Analysis
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max time kernel
144s -
max time network
124s -
platform
windows11-21h2_x64 -
resource
win11-20240221-en -
resource tags
arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system -
submitted
09/04/2024, 05:01
Static task
static1
Behavioral task
behavioral1
Sample
b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral2
Sample
b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe
Resource
win11-20240221-en
General
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Target
b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe
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Size
771KB
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MD5
2a980de49d376b3ce74a9e0d2b62e162
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SHA1
b135b43dfcd38f3d92c8ef89d0c672cb3f297cab
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SHA256
b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027
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SHA512
1f4b5f99cba10082b9f7a7f83e716cebcc711e45fafd932ef255bcd2aef10ff37d8063cffffb5b1af7fa3d6ffef6435a2f66bb715c280579e90d04c44f4d81a5
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SSDEEP
12288:IPiZoikvkDSY0wImPo85s6Gt81RCwiZMNHjpfVsRcdFzVkxjgehS6:gLYzQ85xGORLiGpfucdFzWBhS6
Malware Config
Extracted
djvu
http://sajdfue.com/test1/get.php
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extension
.uajs
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offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://sajdfue.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 17 IoCs
resource yara_rule behavioral2/memory/2336-2-0x0000000004CA0000-0x0000000004DBB000-memory.dmp family_djvu behavioral2/memory/2204-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2204-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2204-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2204-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2204-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2292-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2292-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2292-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2292-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2292-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2292-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2292-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2292-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2292-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2292-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2292-39-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Modifies file permissions 1 TTPs 1 IoCs
pid Process 3908 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-4181651180-3163410697-3990547336-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e71050ca-5251-4d40-ac81-6eb10c00535b\\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe\" --AutoStart" b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe -
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 1 api.2ip.ua 2 api.2ip.ua 6 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 2336 set thread context of 2204 2336 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 78 PID 2468 set thread context of 2292 2468 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 83 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 2204 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 2204 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 2292 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 2292 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 2336 wrote to memory of 2204 2336 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 78 PID 2336 wrote to memory of 2204 2336 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 78 PID 2336 wrote to memory of 2204 2336 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 78 PID 2336 wrote to memory of 2204 2336 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 78 PID 2336 wrote to memory of 2204 2336 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 78 PID 2336 wrote to memory of 2204 2336 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 78 PID 2336 wrote to memory of 2204 2336 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 78 PID 2336 wrote to memory of 2204 2336 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 78 PID 2336 wrote to memory of 2204 2336 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 78 PID 2336 wrote to memory of 2204 2336 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 78 PID 2204 wrote to memory of 3908 2204 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 79 PID 2204 wrote to memory of 3908 2204 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 79 PID 2204 wrote to memory of 3908 2204 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 79 PID 2204 wrote to memory of 2468 2204 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 80 PID 2204 wrote to memory of 2468 2204 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 80 PID 2204 wrote to memory of 2468 2204 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 80 PID 2468 wrote to memory of 2292 2468 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 83 PID 2468 wrote to memory of 2292 2468 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 83 PID 2468 wrote to memory of 2292 2468 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 83 PID 2468 wrote to memory of 2292 2468 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 83 PID 2468 wrote to memory of 2292 2468 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 83 PID 2468 wrote to memory of 2292 2468 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 83 PID 2468 wrote to memory of 2292 2468 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 83 PID 2468 wrote to memory of 2292 2468 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 83 PID 2468 wrote to memory of 2292 2468 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 83 PID 2468 wrote to memory of 2292 2468 b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe"C:\Users\Admin\AppData\Local\Temp\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2336 -
C:\Users\Admin\AppData\Local\Temp\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe"C:\Users\Admin\AppData\Local\Temp\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2204 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\e71050ca-5251-4d40-ac81-6eb10c00535b" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3908
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C:\Users\Admin\AppData\Local\Temp\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe"C:\Users\Admin\AppData\Local\Temp\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2468 -
C:\Users\Admin\AppData\Local\Temp\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe"C:\Users\Admin\AppData\Local\Temp\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2292
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD5fc5408c48a55314c72e200b74330cac4
SHA17e8889ec3189a40e6078088927bf3612753fa628
SHA2567ea2a016d97635b1367455af2250cbf9e9c34d293829d11fc21ce905347590c4
SHA512481753ef755c188012919ea728ea0395f22b6ce83f2f9a11675be6072f154db141b2382dc62ad7c3c95e36596529176a66f40e3d118cf0e33ea8e6f716ae1d77
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize724B
MD58202a1cd02e7d69597995cabbe881a12
SHA18858d9d934b7aa9330ee73de6c476acf19929ff6
SHA25658f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA51297ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize410B
MD5bba8732c6760c04dde5c55e7e954cd12
SHA1c12d6a3a06adadbfe3ac4fefd45ee06cafe3507f
SHA2569f41a73ecea242a7bf5d75ec6d93ddd0b0d32fddef9a173930bbd925dcc6d0e9
SHA512fae6fb700704601dfa6d4481ce8925d010ed641700eea784b471e77cb37878d44ad9283edb28777bdbc2b0f8e4736874a827111aa478c5399a6606efccdeff92
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD50a45ed87e3886281257a7f875ba67804
SHA1c98e0a0e79bda89dfeb1aed386502f8b7bdcb7b2
SHA256ac948a40fdc4bd5b4aa9a2796cb07089414f02393fae58ceeecb39f2bf5b4876
SHA512c80e6602735b12cda6b0d7deb6474b685b6cfc4c950138baab8159be0c9ca30ddbcc9ef0a8eea960964c6a3d816b482778f20d515cfd4afd217c2476ea51ec41
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C:\Users\Admin\AppData\Local\e71050ca-5251-4d40-ac81-6eb10c00535b\b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027.exe
Filesize771KB
MD52a980de49d376b3ce74a9e0d2b62e162
SHA1b135b43dfcd38f3d92c8ef89d0c672cb3f297cab
SHA256b651d3749acd5100b39b60be19f2f94c79f7a6369fbdbfb129924e9fd8967027
SHA5121f4b5f99cba10082b9f7a7f83e716cebcc711e45fafd932ef255bcd2aef10ff37d8063cffffb5b1af7fa3d6ffef6435a2f66bb715c280579e90d04c44f4d81a5