Analysis
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max time kernel
142s -
max time network
123s -
platform
windows11-21h2_x64 -
resource
win11-20240221-en -
resource tags
arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system -
submitted
09/04/2024, 02:51
Static task
static1
Behavioral task
behavioral1
Sample
3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral2
Sample
3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe
Resource
win11-20240221-en
General
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Target
3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe
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Size
771KB
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MD5
a63c52af85c756814f48887bd8c50e8d
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SHA1
8fcb6f701b995d0c5bb9b8c3d77199a7aaae63ec
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SHA256
3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee
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SHA512
505dea5fe013e031aab981c6816254977dbcd5c38aae5410f31fb7d40b8b619fa43ad93d467426034926d79386d08ad330ea0711a052c03a843b16186e386596
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SSDEEP
12288:/JXZ4iJn1bSWll7DBPyOqZ9v70PTIultZdTL50WV1w2:5Zl7DBKL9uIul/d3G2
Malware Config
Extracted
djvu
http://sajdfue.com/test1/get.php
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extension
.uajs
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offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://sajdfue.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 17 IoCs
resource yara_rule behavioral2/memory/820-2-0x0000000004B40000-0x0000000004C5B000-memory.dmp family_djvu behavioral2/memory/4708-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4708-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4708-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4708-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4708-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2764-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2764-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2764-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2764-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2764-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2764-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2764-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2764-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2764-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2764-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2764-39-0x0000000000400000-0x0000000000537000-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
pid Process 3132 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-4280069375-290121026-380765049-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b4d3f298-9f80-48f6-b4e9-01c39371c9e2\\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe\" --AutoStart" 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.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.
flow ioc 3 api.2ip.ua 7 api.2ip.ua 1 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 820 set thread context of 4708 820 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 76 PID 2828 set thread context of 2764 2828 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 81 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 4708 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 4708 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 2764 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 2764 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 820 wrote to memory of 4708 820 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 76 PID 820 wrote to memory of 4708 820 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 76 PID 820 wrote to memory of 4708 820 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 76 PID 820 wrote to memory of 4708 820 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 76 PID 820 wrote to memory of 4708 820 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 76 PID 820 wrote to memory of 4708 820 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 76 PID 820 wrote to memory of 4708 820 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 76 PID 820 wrote to memory of 4708 820 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 76 PID 820 wrote to memory of 4708 820 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 76 PID 820 wrote to memory of 4708 820 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 76 PID 4708 wrote to memory of 3132 4708 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 77 PID 4708 wrote to memory of 3132 4708 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 77 PID 4708 wrote to memory of 3132 4708 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 77 PID 4708 wrote to memory of 2828 4708 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 78 PID 4708 wrote to memory of 2828 4708 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 78 PID 4708 wrote to memory of 2828 4708 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 78 PID 2828 wrote to memory of 2764 2828 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 81 PID 2828 wrote to memory of 2764 2828 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 81 PID 2828 wrote to memory of 2764 2828 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 81 PID 2828 wrote to memory of 2764 2828 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 81 PID 2828 wrote to memory of 2764 2828 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 81 PID 2828 wrote to memory of 2764 2828 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 81 PID 2828 wrote to memory of 2764 2828 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 81 PID 2828 wrote to memory of 2764 2828 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 81 PID 2828 wrote to memory of 2764 2828 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 81 PID 2828 wrote to memory of 2764 2828 3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe"C:\Users\Admin\AppData\Local\Temp\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:820 -
C:\Users\Admin\AppData\Local\Temp\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe"C:\Users\Admin\AppData\Local\Temp\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4708 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\b4d3f298-9f80-48f6-b4e9-01c39371c9e2" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3132
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C:\Users\Admin\AppData\Local\Temp\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe"C:\Users\Admin\AppData\Local\Temp\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2828 -
C:\Users\Admin\AppData\Local\Temp\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe"C:\Users\Admin\AppData\Local\Temp\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2764
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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
MD5580071ebd24cccfd9268e1474bb8134e
SHA1443665efe7009fe1d4c5bc4786dc9cc540e59ef6
SHA25653e3fd53196b53d23b724612cf2704518edf3e979dca02f5674ac419b5f7b461
SHA51213d52455d8a30a0af06c420cd01f13f55efc4c55b59883c5208bf4929352e7b783557bff6a157c4fc71a8e7cbfadf00d55eef8ebef4b984624d8feb116a960a4
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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
MD52d6908b19c25a0c28432963f2f2f74c3
SHA16caaf71a2841453e5f42d90d678bcca7539c55ac
SHA256c0bf97897f361135c4093eb828a6f04a8400256852cb859d4ad20cbc32b6e295
SHA5123d5d2300dcb22d7ea28414a4fe904c3e9655c3e946a5881cc8a83ffc8228e53818fc1017ba89eb78256519f57c24a23c258b69ece68fd8fa4ad067b731f87619
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5b3afcf7aaf0b889d295585484a5b6df6
SHA110c0e9f93203975dddde7f51d01eb604054fd439
SHA256a8e46e106323f65e2a37228940ffaa4d69498615a1f640bf054067ce2495fad8
SHA512768cf0edbe98611ea751af30cb7ee5750e89fba8d10229feb76cdbbdc65232cbc2c1054f3d99fd3caedce8cdc3242bbf31e568e055bc13a02695f2391f3573de
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C:\Users\Admin\AppData\Local\b4d3f298-9f80-48f6-b4e9-01c39371c9e2\3e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee.exe
Filesize771KB
MD5a63c52af85c756814f48887bd8c50e8d
SHA18fcb6f701b995d0c5bb9b8c3d77199a7aaae63ec
SHA2563e92693afc4f1eaf83695fc2c1d0c2b9e1bbf837a46acc6b978e6ba7ee1528ee
SHA512505dea5fe013e031aab981c6816254977dbcd5c38aae5410f31fb7d40b8b619fa43ad93d467426034926d79386d08ad330ea0711a052c03a843b16186e386596