Analysis
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max time kernel
149s -
max time network
158s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
22-05-2024 18:20
Static task
static1
Behavioral task
behavioral1
Sample
50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
Resource
win10v2004-20240508-en
General
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Target
50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
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Size
708KB
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MD5
c991e828e97d9e583ff042e5891d9999
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SHA1
12b6ab69ee99c0c5cb5b4f413f24e84d438b2d96
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SHA256
50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f
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SHA512
f65fcd02981c1a4eea592486ccb6b592fe646dbac48b0104586bf06f96a65124916c9f456ac588411b2b9dc434ede958977cdf47550e957623a1e1c6960573fb
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SSDEEP
12288:tnsGKEfpDplHlPCBMPmpE0NuaAidBVlB+Nze9qXX0S6CjXf23:tsxYpDp9ZCBMI/uaAOug9OfXf4
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/3012-2-0x0000000004230000-0x000000000434B000-memory.dmp family_djvu behavioral2/memory/3444-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3444-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3444-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3444-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3444-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3604-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3604-25-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3604-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3604-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3604-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3604-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3604-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3604-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3604-35-0x0000000000400000-0x0000000000537000-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:
50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\87c61868-8efa-4019-8824-2c994fbeca4a\\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe\" --AutoStart" 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.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 13 api.2ip.ua 5 api.2ip.ua 6 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exedescription pid process target process PID 3012 set thread context of 3444 3012 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3596 set thread context of 3604 3596 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.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:
50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exepid process 3444 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 3444 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 3604 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 3604 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exedescription pid process target process PID 3012 wrote to memory of 3444 3012 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3012 wrote to memory of 3444 3012 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3012 wrote to memory of 3444 3012 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3012 wrote to memory of 3444 3012 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3012 wrote to memory of 3444 3012 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3012 wrote to memory of 3444 3012 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3012 wrote to memory of 3444 3012 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3012 wrote to memory of 3444 3012 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3012 wrote to memory of 3444 3012 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3012 wrote to memory of 3444 3012 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3444 wrote to memory of 3224 3444 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe icacls.exe PID 3444 wrote to memory of 3224 3444 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe icacls.exe PID 3444 wrote to memory of 3224 3444 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe icacls.exe PID 3444 wrote to memory of 3596 3444 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3444 wrote to memory of 3596 3444 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3444 wrote to memory of 3596 3444 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3596 wrote to memory of 3604 3596 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3596 wrote to memory of 3604 3596 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3596 wrote to memory of 3604 3596 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3596 wrote to memory of 3604 3596 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3596 wrote to memory of 3604 3596 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3596 wrote to memory of 3604 3596 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3596 wrote to memory of 3604 3596 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3596 wrote to memory of 3604 3596 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3596 wrote to memory of 3604 3596 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe PID 3596 wrote to memory of 3604 3596 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe 50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe"C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3012 -
C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe"C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3444 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\87c61868-8efa-4019-8824-2c994fbeca4a" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3224 -
C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe"C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3596 -
C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe"C:\Users\Admin\AppData\Local\Temp\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3604
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
MD56728aea2631b86a76c237508d8ba9b55
SHA17a670f95cac088313f7558869162fe01c6dc0ec9
SHA256e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b
SHA512533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5
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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
MD5adead621f2288e26195653c887983fde
SHA1c3e0d98297fd75d9fedfb384dee90a52d81cedf3
SHA2567d82a598981d48e84bf1c2e5e3b7a64338fd1b7ce6c9a38669cb9474171a6f96
SHA512aa810f10532357a96ed94b00404bfffa394c828e4f0f0bd6ec1a029f2d10b296a008daf1160d1fb166feeaded5e100f1ed12a59be117a551b1c78c08dc0306fe
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5a4afb99c6884f5a84aa96b483af9125f
SHA1e80d4ee7937e8622d0c3d1533a81e6e106422e62
SHA256a7f38e972e84069b072fe9ac12605591274a3e5f5a63e4f9d672c05e6ae63fac
SHA51230ec705b8b984083677bd7b7a86591f4966bc1012a8931977b9e0ab60e9dda11530a673d65ffa5a99d079a362b0138a1340d5ddbc433c3bf6929d6e5b9420593
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C:\Users\Admin\AppData\Local\87c61868-8efa-4019-8824-2c994fbeca4a\50e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f.exe
Filesize708KB
MD5c991e828e97d9e583ff042e5891d9999
SHA112b6ab69ee99c0c5cb5b4f413f24e84d438b2d96
SHA25650e67518555f88edc46e95c81c38860c272f45483ccde420315e62827bf3527f
SHA512f65fcd02981c1a4eea592486ccb6b592fe646dbac48b0104586bf06f96a65124916c9f456ac588411b2b9dc434ede958977cdf47550e957623a1e1c6960573fb