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
25-05-2024 21:03
Static task
static1
Behavioral task
behavioral1
Sample
83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
Resource
win11-20240508-en
General
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Target
83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
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Size
733KB
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MD5
73b4377ba5da0cff19465f5cc5491388
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SHA1
9af973b66c4b92019e489500b6f0764045c79f62
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SHA256
83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4
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SHA512
6e3c5f1b81e3c1095183bfd4208323b4db711920943da4f81c113f52ec2051dc64e492ff6cf77a413f1e005a2b5dddffb2c7053adc4bffe57552649d404f0cb2
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SSDEEP
12288:tPA8bo0x6NTfQ5fc39l++XeQho/Z+n5PMkFZ3QaPkiTj:tPifNwk37VroEfZL
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/4748-3-0x0000000004AC0000-0x0000000004BDB000-memory.dmp family_djvu behavioral2/memory/240-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/240-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/240-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/240-2-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/240-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1688-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1688-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1688-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1688-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1688-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1688-39-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1688-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1688-40-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1688-41-0x0000000000400000-0x0000000000537000-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:
83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.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\\3d00ac0a-3d56-4630-855e-739ecf5101ad\\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe\" --AutoStart" 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.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 8 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exedescription pid process target process PID 4748 set thread context of 240 4748 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 3684 set thread context of 1688 3684 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.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:
83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exepid process 240 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 240 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 1688 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 1688 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exedescription pid process target process PID 4748 wrote to memory of 240 4748 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 4748 wrote to memory of 240 4748 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 4748 wrote to memory of 240 4748 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 4748 wrote to memory of 240 4748 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 4748 wrote to memory of 240 4748 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 4748 wrote to memory of 240 4748 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 4748 wrote to memory of 240 4748 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 4748 wrote to memory of 240 4748 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 4748 wrote to memory of 240 4748 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 4748 wrote to memory of 240 4748 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 240 wrote to memory of 1620 240 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe icacls.exe PID 240 wrote to memory of 1620 240 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe icacls.exe PID 240 wrote to memory of 1620 240 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe icacls.exe PID 240 wrote to memory of 3684 240 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 240 wrote to memory of 3684 240 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 240 wrote to memory of 3684 240 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 3684 wrote to memory of 1688 3684 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 3684 wrote to memory of 1688 3684 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 3684 wrote to memory of 1688 3684 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 3684 wrote to memory of 1688 3684 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 3684 wrote to memory of 1688 3684 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 3684 wrote to memory of 1688 3684 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 3684 wrote to memory of 1688 3684 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 3684 wrote to memory of 1688 3684 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 3684 wrote to memory of 1688 3684 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe PID 3684 wrote to memory of 1688 3684 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe 83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe"C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4748 -
C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe"C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:240 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\3d00ac0a-3d56-4630-855e-739ecf5101ad" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1620
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C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe"C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3684 -
C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe"C:\Users\Admin\AppData\Local\Temp\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:1688
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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
MD5ad097f8a8502cc72518724d2b31426ec
SHA14fe49565580149ed2638f29a8cb4f19ef9513a56
SHA25633a6fcd25004cbccf304f74a38be16f8cd00840ae4b70bca52d2cc68e14cc486
SHA5122606d0e4798cd79a7a02c49574cc12f0166284923c4f6adb26aeab544a297c4b34fe253452b3fa76c15a1da670f3fe63988fe77e03ff1cd8e8063d37570aefc2
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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
MD5247cc78c939867d351fac9997cc95f1d
SHA12a751c22647bae670777b2da038dac242de65b2d
SHA25685ceb4b39b60278483c991a01524bb09e663019c517e92120f8bf09d77332e8d
SHA512dea0280bd6ef1fd9875f93acc0d06f9d17918ef78d18d29b1210abc110d0819693c3e25bfd25e3e1899cd2837e38bc9fbd70a8bfc19f8efe380db8c57a6c6d84
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5128e335ee7dcf5e52161510d0095ac5c
SHA1740ed5168d6e159e36522a6f064c1789befde92f
SHA256f0f46c9fb256d079956d8fc3dbaeb34bbb06d8d31bd9ea4f9af80ae5ef6665af
SHA51244ccb831690fa385adff696c24f9f9eccdf23542626d153a15b84fde689a09fb20da570260ea8c3091d15a2eabe4d157b8848f789b986b4f93ca85f53111e3b4
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C:\Users\Admin\AppData\Local\3d00ac0a-3d56-4630-855e-739ecf5101ad\83df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4.exe
Filesize733KB
MD573b4377ba5da0cff19465f5cc5491388
SHA19af973b66c4b92019e489500b6f0764045c79f62
SHA25683df54bedb62c2bbe9e1cf0d9a7d27372d53133d4a10a25cf1ee001f0183bcd4
SHA5126e3c5f1b81e3c1095183bfd4208323b4db711920943da4f81c113f52ec2051dc64e492ff6cf77a413f1e005a2b5dddffb2c7053adc4bffe57552649d404f0cb2