Analysis
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max time kernel
143s -
max time network
123s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
21-05-2024 17:11
Static task
static1
Behavioral task
behavioral1
Sample
f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
Resource
win10v2004-20240508-en
Behavioral task
behavioral2
Sample
f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
Resource
win11-20240508-en
General
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Target
f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
-
Size
738KB
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MD5
3272f4177ebd454a5d1ba9279f20e1a1
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SHA1
fd8a0f709d84c07f79cd21b7ec1aa73e3310b2b0
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SHA256
f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d
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SHA512
6486a6b6403eaec5640cc657bcce4280af824c8d9318f80d08a7f347068c7dca461bf2998f973ba5ba7085027c5f56d55d91504a6d9b4611d374ab67ff63f047
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SSDEEP
12288:MY5C0LI3iARtuv881XKkVrzXyomCOzqlqQE26d:HC0WiAnuHIag26
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 behavioral1/memory/4788-2-0x0000000004140000-0x000000000425B000-memory.dmp family_djvu behavioral1/memory/1328-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1328-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1328-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1328-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1328-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3748-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3748-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3748-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3748-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3748-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3748-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3748-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3748-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3748-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\bfb93ab8-d199-42cf-a5fb-cfe7ccc77f1b\\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe\" --AutoStart" f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.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 4 api.2ip.ua 20 api.2ip.ua 2 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exef289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exedescription pid process target process PID 4788 set thread context of 1328 4788 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 5004 set thread context of 3748 5004 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.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:
f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exef289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exepid process 1328 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe 1328 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe 3748 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe 3748 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exef289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exef289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exedescription pid process target process PID 4788 wrote to memory of 1328 4788 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 4788 wrote to memory of 1328 4788 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 4788 wrote to memory of 1328 4788 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 4788 wrote to memory of 1328 4788 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 4788 wrote to memory of 1328 4788 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 4788 wrote to memory of 1328 4788 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 4788 wrote to memory of 1328 4788 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 4788 wrote to memory of 1328 4788 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 4788 wrote to memory of 1328 4788 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 4788 wrote to memory of 1328 4788 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 1328 wrote to memory of 2072 1328 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe icacls.exe PID 1328 wrote to memory of 2072 1328 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe icacls.exe PID 1328 wrote to memory of 2072 1328 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe icacls.exe PID 1328 wrote to memory of 5004 1328 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 1328 wrote to memory of 5004 1328 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 1328 wrote to memory of 5004 1328 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 5004 wrote to memory of 3748 5004 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 5004 wrote to memory of 3748 5004 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 5004 wrote to memory of 3748 5004 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 5004 wrote to memory of 3748 5004 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 5004 wrote to memory of 3748 5004 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 5004 wrote to memory of 3748 5004 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 5004 wrote to memory of 3748 5004 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 5004 wrote to memory of 3748 5004 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 5004 wrote to memory of 3748 5004 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe PID 5004 wrote to memory of 3748 5004 f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe"C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4788 -
C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe"C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1328 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\bfb93ab8-d199-42cf-a5fb-cfe7ccc77f1b" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2072 -
C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe"C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5004 -
C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe"C:\Users\Admin\AppData\Local\Temp\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3748
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD5df80f9ba75076db634761b6132e0d4e3
SHA107983946fb660752c7cccb2ef82d01ec4c9ecc5d
SHA256d5ff96fd8b416de93a85783192206224cf8821c240cd8ff755f2e8270153dd99
SHA5124ec734c5d29e9ce00b00e42b627253195e8c7a158433fedfcee428e692a6501981c33d7c8a39235f8b691f087145cdbe660b430493edbeedb12588c5cdd5a66a
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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
MD57ab7f71ca3b66c963f16ced32610976d
SHA1c955b825cf828d5dfbafcebd99e6dcaea67a1046
SHA256519300bbc8fa37d9edd179022cbe6060cf5d61851d041699f20f9623d1a6e542
SHA512de1088561d7df6a6806b230fad1ba6472c16b9ef2dce528fe31c287cba5074f2d8a2ee2606b7282cbb5f12734a49a40de17e694ad5ff817dca722540e9b44167
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD511f278ecfadd681ed364f1d2378e1c12
SHA186ca6ba60845cb97e850c3849028735b799607d7
SHA2564f9ab2929062209a0fef639022b39e69aa46473633ca68853a91340f0dd6e5fd
SHA512d4ba5faf3ca38d8a709f0fdb2a2657732a14be4f6107a7725b3e3d13b1d8f1d6d4602c72ff70ba200f5f2a49b76caea59f28cc29a008e2de7ca36ef017b54aaa
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C:\Users\Admin\AppData\Local\bfb93ab8-d199-42cf-a5fb-cfe7ccc77f1b\f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d.exe
Filesize738KB
MD53272f4177ebd454a5d1ba9279f20e1a1
SHA1fd8a0f709d84c07f79cd21b7ec1aa73e3310b2b0
SHA256f289a570acf7065f25cd7bbcdc1b34992324a9f7d6ac709f41544c5c5a99ba6d
SHA5126486a6b6403eaec5640cc657bcce4280af824c8d9318f80d08a7f347068c7dca461bf2998f973ba5ba7085027c5f56d55d91504a6d9b4611d374ab67ff63f047