163 lines
7.7 KiB
Plaintext
163 lines
7.7 KiB
Plaintext
import "hash"
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rule Globeimposter {
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meta:
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description = "Detect the risk of Ransomware Globeimposter Rule 1"
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hash1 = "e478fe703e64b417ed40b35dc5063e78afc00b26b867b12e648efd94d8be59cc"
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strings:
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$s1 = "fistulization7.dll" fullword ascii
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$s2 = "Husmandsforeningen.exe" fullword wide
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$s3 = "GetPrintProcessorDirectoryA" fullword ascii
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$s4 = "C:\\Program Files (x86)\\Microsoft Visual Studio\\VB98\\VB6.OLB" fullword ascii
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$s5 = "AShell_NotifyIconA" fullword ascii
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$s6 = "EnumPortsA" fullword ascii
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$s7 = "Tittupping" fullword ascii
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$s8 = "Husmandsforeningen" fullword wide
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$s9 = "Slappendes" fullword ascii
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$s10 = "Cosmetics" fullword ascii
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$s11 = "Besindedes" fullword ascii
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$s12 = "Pimpstenens" fullword ascii
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$s13 = "Pneumatogenic" fullword ascii
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$s14 = "Epimorphosis8" fullword ascii
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$s15 = "Antistimulation4" fullword ascii
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$s16 = "Crithidia3" fullword ascii
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$s17 = "Teksthenvisningen5" fullword ascii
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$s18 = "Unpuddled7" fullword ascii
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$s19 = "Underfakturerings6" fullword ascii
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$s20 = "UY3 /i" fullword ascii
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condition:
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uint16(0) == 0x5a4d and filesize < 1000KB and
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8 of them
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}
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rule Ransomware_Globeimposter {
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meta:
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description = "Detect the risk of Ransomware Globeimposter Rule 2"
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hash1 = "e478fe703e64b417ed40b35dc5063e78afc00b26b867b12e648efd94d8be59cc"
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strings:
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$s1 = "fistulization7.dll" fullword ascii
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$s2 = "Husmandsforeningen.exe" fullword wide
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$s3 = "GetPrintProcessorDirectoryA" fullword ascii
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$s4 = "C:\\Program Files (x86)\\Microsoft Visual Studio\\VB98\\VB6.OLB" fullword ascii
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$s5 = "AShell_NotifyIconA" fullword ascii
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$s6 = "EnumPortsA" fullword ascii
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$s7 = "Tittupping" fullword ascii
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$s8 = "Husmandsforeningen" fullword wide
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$s9 = "Slappendes" fullword ascii
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$s10 = "Cosmetics" fullword ascii
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$s11 = "Besindedes" fullword ascii
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$s12 = "Pimpstenens" fullword ascii
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$s13 = "Pneumatogenic" fullword ascii
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$s14 = "Epimorphosis8" fullword ascii
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$s15 = "Antistimulation4" fullword ascii
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$s16 = "Crithidia3" fullword ascii
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$s17 = "Teksthenvisningen5" fullword ascii
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$s18 = "Unpuddled7" fullword ascii
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$s19 = "Underfakturerings6" fullword ascii
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$s20 = "UY3 /i" fullword ascii
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condition:
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uint16(0) == 0x5a4d and filesize < 1000KB and
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5 of them
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}
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rule win_globeimposter_auto {
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meta:
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description = "Detect the risk of Ransomware Globeimposter Rule 3"
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strings:
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$sequence_0 = { 0ff4d0 0f6e6604 0ff4e0 0f6e7608 0ff4f0 0f6e7e0c }
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// n = 6, score = 700
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// 0ff4d0 | pmuludq mm2, mm0
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// 0f6e6604 | movd mm4, dword ptr [esi + 4]
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// 0ff4e0 | pmuludq mm4, mm0
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// 0f6e7608 | movd mm6, dword ptr [esi + 8]
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// 0ff4f0 | pmuludq mm6, mm0
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// 0f6e7e0c | movd mm7, dword ptr [esi + 0xc]
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$sequence_1 = { 45 8364241000 8d442410 50 6880000000 8d44241c }
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// n = 6, score = 700
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// 45 | inc ebp
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// 8364241000 | and dword ptr [esp + 0x10], 0
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// 8d442410 | lea eax, [esp + 0x10]
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// 50 | push eax
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// 6880000000 | push 0x80
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// 8d44241c | lea eax, [esp + 0x1c]
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$sequence_2 = { 43 85d2 7e18 8d4e7c 8b41fc 3b01 }
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// n = 6, score = 700
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// 43 | inc ebx
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// 85d2 | test edx, edx
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// 7e18 | jle 0x1a
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// 8d4e7c | lea ecx, [esi + 0x7c]
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// 8b41fc | mov eax, dword ptr [ecx - 4]
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// 3b01 | cmp eax, dword ptr [ecx]
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$sequence_3 = { 8b450c 99 33c2 c745f401000000 }
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// n = 4, score = 700
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// 8b450c | mov eax, dword ptr [ebp + 0xc]
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// 99 | cdq
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// 33c2 | xor eax, edx
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// c745f401000000 | mov dword ptr [ebp - 0xc], 1
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$sequence_4 = { 48 8bfb 2bf8 89442414 }
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// n = 4, score = 700
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// 48 | dec eax
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// 8bfb | mov edi, ebx
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// 2bf8 | sub edi, eax
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// 89442414 | mov dword ptr [esp + 0x14], eax
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$sequence_5 = { 5e 5b 5f 5d 83c420 c20c00 }
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// n = 6, score = 700
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// 5e | pop esi
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// 5b | pop ebx
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// 5f | pop edi
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// 5d | pop ebp
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// 83c420 | add esp, 0x20
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// c20c00 | ret 0xc
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$sequence_6 = { 7e0e 8d4678 8928 41 8d4014 3b4e6c }
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// n = 6, score = 700
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// 7e0e | jle 0x10
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// 8d4678 | lea eax, [esi + 0x78]
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// 8928 | mov dword ptr [eax], ebp
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// 41 | inc ecx
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// 8d4014 | lea eax, [eax + 0x14]
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// 3b4e6c | cmp ecx, dword ptr [esi + 0x6c]
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$sequence_7 = { 7505 6ac4 58 eb2f }
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// n = 4, score = 700
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// 7505 | jne 7
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// 6ac4 | push -0x3c
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// 58 | pop eax
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// eb2f | jmp 0x31
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$sequence_8 = { 8d0445ffffffff 8945f0 8d45fc 8945f8 8d45f0 50 }
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// n = 6, score = 700
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// 8d0445ffffffff | lea eax, [eax*2 - 1]
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// 8945f0 | mov dword ptr [ebp - 0x10], eax
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// 8d45fc | lea eax, [ebp - 4]
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// 8945f8 | mov dword ptr [ebp - 8], eax
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// 8d45f0 | lea eax, [ebp - 0x10]
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// 50 | push eax
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$sequence_9 = { ff15???????? 85c0 7405 3975fc 7405 6afe 58 }
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// n = 7, score = 700
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// ff15???????? |
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// 85c0 | test eax, eax
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// 7405 | je 7
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// 3975fc | cmp dword ptr [ebp - 4], esi
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// 7405 | je 7
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// 6afe | push -2
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// 58 | pop eax
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condition:
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7 of them and filesize < 327680
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}
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rule globeimposter_hash
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{
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meta:
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description ="Detect the risk of globeimposter Rule 4"
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condition:
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hash.sha256(0,filesize) =="70866cee3b129918e2ace1870e66801bc25a18efd6a8c0234a63fccaee179b68" or
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hash.sha256(0,filesize) =="8b6993a935c33bbc028b2c72d7b2e769ff2cd5ad35331bc4d2dcce67a0c81569"
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}
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