Analysis
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max time kernel
143s -
max time network
123s -
platform
windows11-21h2_x64 -
resource
win11-20240508-en -
resource tags
arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system -
submitted
22-05-2024 10:01
Static task
static1
Behavioral task
behavioral1
Sample
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe
Resource
win10v2004-20240508-en
Behavioral task
behavioral2
Sample
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe
Resource
win11-20240508-en
General
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Target
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe
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Size
702KB
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MD5
dd1cb88ac4542fea3c32b4ff7c60483e
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SHA1
b4b716636014911d002c72ca8e35fb90c7074b76
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SHA256
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012
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SHA512
df9929a028576507fbf9307a723877eee25463868499c10d3b2c45defd665331f2425e96a6ad2035f7baa6a0c2fe3a75830d56a9bfc8ae44f1e846043d9f12f1
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SSDEEP
12288:WRuDXAgdLFderRBGPHzyoqJnG7suDKkrq3Daa1qG7GXiLSG4Bfp5C:WREdLXRPGBJG7Rekrq32awCSiLSPV
Malware Config
Extracted
djvu
http://cajgtus.com/test2/get.php
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extension
.vehu
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offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://cajgtus.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 15 IoCs
Processes:
resource yara_rule behavioral2/memory/5048-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/5100-5-0x0000000004B60000-0x0000000004C7B000-memory.dmp family_djvu behavioral2/memory/5048-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/5048-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/5048-2-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/5048-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1364-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1364-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1364-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1364-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1364-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1364-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1364-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1364-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1364-37-0x0000000000400000-0x0000000000537000-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
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3433428765-2473475212-4279855560-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e79973e8-e286-4d03-b4a9-962f6e104a95\\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe\" --AutoStart" 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.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.
Processes:
flow ioc 2 api.2ip.ua 7 api.2ip.ua 1 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exedescription pid process target process PID 5100 set thread context of 5048 5100 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 104 set thread context of 1364 104 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exepid process 5048 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 5048 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 1364 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 1364 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exedescription pid process target process PID 5100 wrote to memory of 5048 5100 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 5100 wrote to memory of 5048 5100 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 5100 wrote to memory of 5048 5100 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 5100 wrote to memory of 5048 5100 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 5100 wrote to memory of 5048 5100 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 5100 wrote to memory of 5048 5100 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 5100 wrote to memory of 5048 5100 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 5100 wrote to memory of 5048 5100 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 5100 wrote to memory of 5048 5100 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 5100 wrote to memory of 5048 5100 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 5048 wrote to memory of 2992 5048 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe icacls.exe PID 5048 wrote to memory of 2992 5048 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe icacls.exe PID 5048 wrote to memory of 2992 5048 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe icacls.exe PID 5048 wrote to memory of 104 5048 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 5048 wrote to memory of 104 5048 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 5048 wrote to memory of 104 5048 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 104 wrote to memory of 1364 104 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 104 wrote to memory of 1364 104 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 104 wrote to memory of 1364 104 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 104 wrote to memory of 1364 104 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 104 wrote to memory of 1364 104 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 104 wrote to memory of 1364 104 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 104 wrote to memory of 1364 104 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 104 wrote to memory of 1364 104 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 104 wrote to memory of 1364 104 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe PID 104 wrote to memory of 1364 104 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe 645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe"C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5100 -
C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe"C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5048 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\e79973e8-e286-4d03-b4a9-962f6e104a95" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2992 -
C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe"C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:104 -
C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe"C:\Users\Admin\AppData\Local\Temp\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:1364
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
MD5195fc28150bef9b30510eed36fb325af
SHA11ea8a314d8af1d431b77d5280d1782e9a8e867c6
SHA2565c2e51ccf5767f80257a0a0bb66dee40957e5379431e15a118e7f1343ad1f6e0
SHA512537da7e46d8b5afc796c1908042088c583c5380fb729f3665845fe36286b3efeaec9fa26475e9c2263f55b1eca04bd7ae26088a9a85950b2b7f750fd24eadcfc
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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
MD5133d62f51f9606e085206c87e3c2c095
SHA1bf3e8aedb2f92b12055730cd544cc4ebe79b45f8
SHA256e0a4a861ec64fe9a3cdd73b2ff7bcdf626e4a965ee22d39a31721b80702d9898
SHA512f8c28a01bf141a43da0b7d0192b27762ddf2ba183fcde5d9f2eb34d96bfdd8046adc1d63211a878b210c1e7abd1f4b3484aa043312b28835dccafc61fbfc8f9b
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5b464283a9104c250b476065b838d6e92
SHA1e6e224b83f022df7eb31dc01d4a7bf3a6506b029
SHA25661c2803fd69a3da8d7747c71fbf9fbd6c1d1b34a1b7b8ae5fd77c65ca8de64b9
SHA512e09b5056794018eb4d48e43512c724796b96c0ae028686d6f16db7546f230a9f2294ecef035c37a096dc97695f273dc5f4347d8c0ad9a624b8557427b537b3cb
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C:\Users\Admin\AppData\Local\e79973e8-e286-4d03-b4a9-962f6e104a95\645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012.exe
Filesize702KB
MD5dd1cb88ac4542fea3c32b4ff7c60483e
SHA1b4b716636014911d002c72ca8e35fb90c7074b76
SHA256645bc13bf5dfefb2f0d2412363f424439f266989a5eba19abe6a2d98a7e2c012
SHA512df9929a028576507fbf9307a723877eee25463868499c10d3b2c45defd665331f2425e96a6ad2035f7baa6a0c2fe3a75830d56a9bfc8ae44f1e846043d9f12f1