Analysis
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max time kernel
146s -
max time network
148s -
platform
windows11-21h2_x64 -
resource
win11-20240508-en -
resource tags
arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system -
submitted
21-05-2024 22:02
Static task
static1
Behavioral task
behavioral1
Sample
d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
Resource
win11-20240508-en
General
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Target
d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
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Size
709KB
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MD5
a8a057d904ff939a2e74bc340391122e
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SHA1
2f1c5113abda6750f790d1338b15232259b6a85c
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SHA256
d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458
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SHA512
bf7fe893d919d454202c7e4f4ac618af616c22db6938175466bd2b0251e9f2fff7f4b9b205e6ee9a28200faba4ad8194f13c82600b41f7225575913121aedd0e
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SSDEEP
12288:jJHb/Q8qaDugZCA9R1/cxGtUcauu1xasDi4lREee3y:FHb/n5dutrRwy
Malware Config
Extracted
djvu
http://cajgtus.com/test1/get.php
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extension
.vepi
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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/3716-2-0x00000000042B0000-0x00000000043CB000-memory.dmp family_djvu behavioral2/memory/480-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/480-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/480-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/480-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/480-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/328-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/328-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/328-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/328-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/328-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/328-39-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/328-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/328-40-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/328-41-0x0000000000400000-0x0000000000537000-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:
d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\53fd561c-eef8-46b2-a745-f1bbef598a30\\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe\" --AutoStart" d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.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 1 api.2ip.ua 2 api.2ip.ua 6 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exed83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exedescription pid process target process PID 3716 set thread context of 480 3716 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 4848 set thread context of 328 4848 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.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:
d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exed83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exepid process 480 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe 480 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe 328 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe 328 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exed83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exed83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exedescription pid process target process PID 3716 wrote to memory of 480 3716 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 3716 wrote to memory of 480 3716 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 3716 wrote to memory of 480 3716 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 3716 wrote to memory of 480 3716 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 3716 wrote to memory of 480 3716 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 3716 wrote to memory of 480 3716 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 3716 wrote to memory of 480 3716 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 3716 wrote to memory of 480 3716 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 3716 wrote to memory of 480 3716 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 3716 wrote to memory of 480 3716 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 480 wrote to memory of 4688 480 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe icacls.exe PID 480 wrote to memory of 4688 480 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe icacls.exe PID 480 wrote to memory of 4688 480 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe icacls.exe PID 480 wrote to memory of 4848 480 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 480 wrote to memory of 4848 480 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 480 wrote to memory of 4848 480 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 4848 wrote to memory of 328 4848 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 4848 wrote to memory of 328 4848 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 4848 wrote to memory of 328 4848 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 4848 wrote to memory of 328 4848 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 4848 wrote to memory of 328 4848 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 4848 wrote to memory of 328 4848 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 4848 wrote to memory of 328 4848 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 4848 wrote to memory of 328 4848 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 4848 wrote to memory of 328 4848 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe PID 4848 wrote to memory of 328 4848 d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe"C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3716 -
C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe"C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:480 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\53fd561c-eef8-46b2-a745-f1bbef598a30" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4688 -
C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe"C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4848 -
C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe"C:\Users\Admin\AppData\Local\Temp\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:328
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
MD5a1d955617a4d146e70544d0d9a0390ca
SHA15ffdc4453b23e24a7cb0e634b26864c169f5257b
SHA2568dbff2c0018158256912d87dd495a68c351303a319f50f204a930317e867aeb3
SHA5120bffbc27638b12cc04f335de8c4f3c74df01ae55b56f389f8d046d797b4c62d31bbff057ea75ce32f67cdd3b878fd0aad3eb62e983f814296e1b94de3c6ba810
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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
MD50cb7015e93dc42b9f96423fda1e0313f
SHA15e8d7080eb2735474513778f91a0545c79222047
SHA2560a5c1ec0b5fad59a0869f5f68ed31eadf4f62652911cd14936ecd3f788a3d478
SHA512c2d156fce982f02b6326f093397dbcc8abd19abc263584cde07893c1233b2b82b13c972f98e45896a2dd2b44cc3d0e9bfbaaac550182b355a01d28fb234458a1
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD508544f9d19303a8518b07f4ed540937b
SHA13a99f3338df4edee14c8b74e83edd2e17cd16574
SHA25610343036511eb97f78b69390b4047954c947aa5dbb1720510a57b9cc15d65533
SHA5123dc1410432ad3505a485ae410fdf6417b063fa4ead090e048b273ecfb18e28b5f5ad314536e756f7cbf07ce9fe9d8a8a10f0284ca02aa5a0985346b8789379aa
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C:\Users\Admin\AppData\Local\53fd561c-eef8-46b2-a745-f1bbef598a30\d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458.exe
Filesize709KB
MD5a8a057d904ff939a2e74bc340391122e
SHA12f1c5113abda6750f790d1338b15232259b6a85c
SHA256d83e1644b8554921261b610d2e3dd5e8de0153f550749bcbfc805cfbc3e4b458
SHA512bf7fe893d919d454202c7e4f4ac618af616c22db6938175466bd2b0251e9f2fff7f4b9b205e6ee9a28200faba4ad8194f13c82600b41f7225575913121aedd0e