Analysis
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max time kernel
146s -
max time network
150s -
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 19:18
Static task
static1
Behavioral task
behavioral1
Sample
844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
Resource
win11-20240508-en
General
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Target
844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
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Size
710KB
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MD5
f9139094053186c48b13bc99c9adf7b3
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SHA1
bc35ca5986f7f6bd25fdf532bd6479de79f06335
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SHA256
844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08
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SHA512
8f33df09e10d594ab3c99c21f91b3d9846950362d137fce1236ad00f4fbdf25fcfaea25790447a18154300c809f4e767661deb9235b098bfd88860e285feef8c
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SSDEEP
12288:SddazWg8qwt/BWN2Df90NqLiyz5a8HpnhTLPN/9mEPQXKLA2fPXX2P:SdAz78tj02DfSsLbzhHphHTqEAcPW
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/3264-2-0x0000000004B00000-0x0000000004C1B000-memory.dmp family_djvu behavioral2/memory/3520-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3520-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3520-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3520-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3520-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1156-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1156-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1156-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1156-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1156-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1156-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1156-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1156-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1156-37-0x0000000000400000-0x0000000000537000-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:
844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1672260578-815027929-964132517-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\d59068e2-e584-456c-a971-da328e4088e9\\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe\" --AutoStart" 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.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 7 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exedescription pid process target process PID 3264 set thread context of 3520 3264 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 1100 set thread context of 1156 1100 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.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:
844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exepid process 3520 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 3520 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 1156 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 1156 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exedescription pid process target process PID 3264 wrote to memory of 3520 3264 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 3264 wrote to memory of 3520 3264 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 3264 wrote to memory of 3520 3264 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 3264 wrote to memory of 3520 3264 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 3264 wrote to memory of 3520 3264 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 3264 wrote to memory of 3520 3264 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 3264 wrote to memory of 3520 3264 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 3264 wrote to memory of 3520 3264 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 3264 wrote to memory of 3520 3264 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 3264 wrote to memory of 3520 3264 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 3520 wrote to memory of 2272 3520 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe icacls.exe PID 3520 wrote to memory of 2272 3520 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe icacls.exe PID 3520 wrote to memory of 2272 3520 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe icacls.exe PID 3520 wrote to memory of 1100 3520 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 3520 wrote to memory of 1100 3520 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 3520 wrote to memory of 1100 3520 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 1100 wrote to memory of 1156 1100 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 1100 wrote to memory of 1156 1100 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 1100 wrote to memory of 1156 1100 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 1100 wrote to memory of 1156 1100 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 1100 wrote to memory of 1156 1100 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 1100 wrote to memory of 1156 1100 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 1100 wrote to memory of 1156 1100 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 1100 wrote to memory of 1156 1100 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 1100 wrote to memory of 1156 1100 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe PID 1100 wrote to memory of 1156 1100 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe 844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe"C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3264 -
C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe"C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3520 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\d59068e2-e584-456c-a971-da328e4088e9" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2272 -
C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe"C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1100 -
C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe"C:\Users\Admin\AppData\Local\Temp\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:1156
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
MD5a5d4f088e96547b3dab304f5e0304405
SHA1b1ad96e1306891dfab6e6b894b637bc28b8e6b9f
SHA25699248eebdb235875f09fd672cf8dda845555b8a53db4705527f9c5549e1f68c4
SHA5124ec954b05a92ed6fc140011964d8e843f5ec825ecb1da428f06f4e7318492a8d1d6658151ba91dbd08b83310cb89b4e121ea24ca5e2b88555650d5a9fd0c4fd5
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5db3708e6920e8bce34b8d783b599ae4c
SHA134349d4b5ed7f608164bd187cf4d26ce21a7101a
SHA256b3e090c7e06f4ed7c7d5a89ba5bb7694b160182a49cab7f3410dc63a5be3a5ff
SHA51243651210ff4fa6b62eaf2868defc927c5765014976d937f1264d19207ceb0c5bbf7e39dcbf48720983da262e9b519ae1399442dc37c1e4fb45150ac808ccc15f
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C:\Users\Admin\AppData\Local\d59068e2-e584-456c-a971-da328e4088e9\844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08.exe
Filesize710KB
MD5f9139094053186c48b13bc99c9adf7b3
SHA1bc35ca5986f7f6bd25fdf532bd6479de79f06335
SHA256844a51152049af67c9cc604b324da1e5f949fd1b18b6a06a93fea730750a3a08
SHA5128f33df09e10d594ab3c99c21f91b3d9846950362d137fce1236ad00f4fbdf25fcfaea25790447a18154300c809f4e767661deb9235b098bfd88860e285feef8c