Analysis
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max time kernel
141s -
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
22-05-2024 00:01
Static task
static1
Behavioral task
behavioral1
Sample
434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe
Resource
win10v2004-20240508-en
Behavioral task
behavioral2
Sample
434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe
Resource
win11-20240508-en
General
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Target
434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe
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Size
806KB
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MD5
94ec3337ff55fbb90c9826771ee1a452
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SHA1
92a37f78607bb102849ee65f6efce5902302a958
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SHA256
434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e
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SHA512
be5f8de7734fde10771cf8567a4b41483bd9033c9ece6a8f92d584b181d7f43e87db22864d33e3cb1c562189dcd230e82e411bb966de9220b5bb8da2e3a89be4
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SSDEEP
12288:YX00kQCEdfrJBMAZc5o35iKAO+N6yUemIC7JNJ5g0kYVSxcnG:el6AfXYy5iKAOsSICpSYVq
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 behavioral2/memory/4360-2-0x00000000041A0000-0x00000000042BB000-memory.dmp family_djvu behavioral2/memory/4328-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4328-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4328-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4328-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4328-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2956-37-0x0000000000400000-0x0000000000537000-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:
434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3433428765-2473475212-4279855560-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f53ff194-04c3-4dcf-b04f-701e28ccea19\\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe\" --AutoStart" 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.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 2 api.2ip.ua 13 api.2ip.ua 1 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exedescription pid process target process PID 4360 set thread context of 4328 4360 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 1312 set thread context of 2956 1312 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.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:
434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exepid process 4328 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 4328 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 2956 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 2956 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exedescription pid process target process PID 4360 wrote to memory of 4328 4360 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 4360 wrote to memory of 4328 4360 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 4360 wrote to memory of 4328 4360 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 4360 wrote to memory of 4328 4360 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 4360 wrote to memory of 4328 4360 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 4360 wrote to memory of 4328 4360 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 4360 wrote to memory of 4328 4360 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 4360 wrote to memory of 4328 4360 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 4360 wrote to memory of 4328 4360 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 4360 wrote to memory of 4328 4360 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 4328 wrote to memory of 1792 4328 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe icacls.exe PID 4328 wrote to memory of 1792 4328 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe icacls.exe PID 4328 wrote to memory of 1792 4328 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe icacls.exe PID 4328 wrote to memory of 1312 4328 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 4328 wrote to memory of 1312 4328 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 4328 wrote to memory of 1312 4328 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 1312 wrote to memory of 2956 1312 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 1312 wrote to memory of 2956 1312 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 1312 wrote to memory of 2956 1312 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 1312 wrote to memory of 2956 1312 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 1312 wrote to memory of 2956 1312 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 1312 wrote to memory of 2956 1312 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 1312 wrote to memory of 2956 1312 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 1312 wrote to memory of 2956 1312 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 1312 wrote to memory of 2956 1312 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe PID 1312 wrote to memory of 2956 1312 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe 434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe"C:\Users\Admin\AppData\Local\Temp\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4360 -
C:\Users\Admin\AppData\Local\Temp\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe"C:\Users\Admin\AppData\Local\Temp\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4328 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\f53ff194-04c3-4dcf-b04f-701e28ccea19" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1792 -
C:\Users\Admin\AppData\Local\Temp\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe"C:\Users\Admin\AppData\Local\Temp\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1312 -
C:\Users\Admin\AppData\Local\Temp\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe"C:\Users\Admin\AppData\Local\Temp\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2956
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
MD5a1d955617a4d146e70544d0d9a0390ca
SHA15ffdc4453b23e24a7cb0e634b26864c169f5257b
SHA2568dbff2c0018158256912d87dd495a68c351303a319f50f204a930317e867aeb3
SHA5120bffbc27638b12cc04f335de8c4f3c74df01ae55b56f389f8d046d797b4c62d31bbff057ea75ce32f67cdd3b878fd0aad3eb62e983f814296e1b94de3c6ba810
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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
MD58bca31f85ccbebe6b793afe5fe223059
SHA1b5f9466693ed21a48b9f5fc6e270d95d3d27ef91
SHA25601566416c9c8d7a5f100c8bb0261eab06cb16ad97438086c31c53ad2bd80059c
SHA512f181eca72a2d407d714effc6827332c2565d8b7191a474e94eb85cc3a2d1f8137b873470d0df0faa1d31667fbb230fadd7fc2d4d78a4d0afe0fac1203ed83279
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5f416017ded3d4b5cc38c940c13f26605
SHA10544209621585aee410c15ac7c38e7cb0f4dd758
SHA256605f0858dc875b86606e3d052d764e9cdb1724052d0109234b56946a244827e4
SHA5120f72f8d79f24e2338919aa99587f550d90675e079a220e6f3a726fd0252dff23f6f035d98ace7e5b2a677e334d7d2494f51f8dfc028226f5f01d01c65b249a7b
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C:\Users\Admin\AppData\Local\f53ff194-04c3-4dcf-b04f-701e28ccea19\434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e.exe
Filesize806KB
MD594ec3337ff55fbb90c9826771ee1a452
SHA192a37f78607bb102849ee65f6efce5902302a958
SHA256434d0afff9951493f14b3df3341106085d6b25585048f24260ea79bca876dd2e
SHA512be5f8de7734fde10771cf8567a4b41483bd9033c9ece6a8f92d584b181d7f43e87db22864d33e3cb1c562189dcd230e82e411bb966de9220b5bb8da2e3a89be4