Analysis
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max time kernel
149s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
29/03/2024, 07:30
Static task
static1
Behavioral task
behavioral1
Sample
817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral2
Sample
817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe
Resource
win11-20240221-en
General
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Target
817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe
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Size
732KB
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MD5
ec1b4124cea7ec9f0173b8742e525b94
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SHA1
b8a59973e6b06339fb92373ea9f434a5418d2663
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SHA256
817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb
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SHA512
f376bdb59f2b88c135e9013a435872248ea9a0a86859c1b65c9092870edb17075dec05910cda0725f0f12193565263f100a5095d30ec8c3993ce99985dbbdc13
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SSDEEP
12288:aTmCAE1hLsu8q+IxfHTfP8ShBNin5T5SudqueYU4eh4f1gE1vaPs:aTg8hLRjxndh3ulSI9Le8paPs
Malware Config
Extracted
djvu
http://sajdfue.com/test2/get.php
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extension
.looy
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offline_id
1eSPzWRaNslCgtjBZfL5pzvovoiaVI4IZSnvAwt1
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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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Extracted
vidar
8.6
5739ef2bbcd39fcd59c5746bfe4238c5
https://steamcommunity.com/profiles/76561199658817715
https://t.me/sa9ok
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profile_id_v2
5739ef2bbcd39fcd59c5746bfe4238c5
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user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36
Signatures
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Detect Vidar Stealer 5 IoCs
resource yara_rule behavioral1/memory/5076-47-0x0000000000400000-0x0000000000644000-memory.dmp family_vidar_v7 behavioral1/memory/2244-49-0x0000000002170000-0x00000000021A1000-memory.dmp family_vidar_v7 behavioral1/memory/5076-52-0x0000000000400000-0x0000000000644000-memory.dmp family_vidar_v7 behavioral1/memory/5076-53-0x0000000000400000-0x0000000000644000-memory.dmp family_vidar_v7 behavioral1/memory/5076-71-0x0000000000400000-0x0000000000644000-memory.dmp family_vidar_v7 -
Detected Djvu ransomware 16 IoCs
resource yara_rule behavioral1/memory/2080-2-0x00000000023A0000-0x00000000024BB000-memory.dmp family_djvu behavioral1/memory/1540-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1540-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1540-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1540-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1540-15-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/440-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/440-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/440-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/440-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/440-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/440-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/440-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/440-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/440-69-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/440-74-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Downloads MZ/PE file
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Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe Key value queried \REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe -
Executes dropped EXE 5 IoCs
pid Process 2244 build2.exe 5076 build2.exe 316 build3.exe 3228 build3.exe 3504 mstsca.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 952 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\96efd875-7879-49b0-b194-f3e002077395\\817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe\" --AutoStart" 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.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 6 api.2ip.ua 21 api.2ip.ua 5 api.2ip.ua -
Suspicious use of SetThreadContext 4 IoCs
description pid Process procid_target PID 2080 set thread context of 1540 2080 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 88 PID 1748 set thread context of 440 1748 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 93 PID 2244 set thread context of 5076 2244 build2.exe 100 PID 316 set thread context of 3228 316 build3.exe 109 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 1 IoCs
pid pid_target Process procid_target 1688 5076 WerFault.exe 100 -
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 1544 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1540 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 1540 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 440 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 440 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe -
Suspicious use of WriteProcessMemory 54 IoCs
description pid Process procid_target PID 2080 wrote to memory of 1540 2080 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 88 PID 2080 wrote to memory of 1540 2080 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 88 PID 2080 wrote to memory of 1540 2080 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 88 PID 2080 wrote to memory of 1540 2080 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 88 PID 2080 wrote to memory of 1540 2080 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 88 PID 2080 wrote to memory of 1540 2080 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 88 PID 2080 wrote to memory of 1540 2080 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 88 PID 2080 wrote to memory of 1540 2080 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 88 PID 2080 wrote to memory of 1540 2080 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 88 PID 2080 wrote to memory of 1540 2080 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 88 PID 1540 wrote to memory of 952 1540 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 90 PID 1540 wrote to memory of 952 1540 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 90 PID 1540 wrote to memory of 952 1540 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 90 PID 1540 wrote to memory of 1748 1540 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 91 PID 1540 wrote to memory of 1748 1540 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 91 PID 1540 wrote to memory of 1748 1540 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 91 PID 1748 wrote to memory of 440 1748 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 93 PID 1748 wrote to memory of 440 1748 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 93 PID 1748 wrote to memory of 440 1748 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 93 PID 1748 wrote to memory of 440 1748 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 93 PID 1748 wrote to memory of 440 1748 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 93 PID 1748 wrote to memory of 440 1748 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 93 PID 1748 wrote to memory of 440 1748 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 93 PID 1748 wrote to memory of 440 1748 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 93 PID 1748 wrote to memory of 440 1748 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 93 PID 1748 wrote to memory of 440 1748 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 93 PID 440 wrote to memory of 2244 440 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 99 PID 440 wrote to memory of 2244 440 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 99 PID 440 wrote to memory of 2244 440 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 99 PID 2244 wrote to memory of 5076 2244 build2.exe 100 PID 2244 wrote to memory of 5076 2244 build2.exe 100 PID 2244 wrote to memory of 5076 2244 build2.exe 100 PID 2244 wrote to memory of 5076 2244 build2.exe 100 PID 2244 wrote to memory of 5076 2244 build2.exe 100 PID 2244 wrote to memory of 5076 2244 build2.exe 100 PID 2244 wrote to memory of 5076 2244 build2.exe 100 PID 2244 wrote to memory of 5076 2244 build2.exe 100 PID 2244 wrote to memory of 5076 2244 build2.exe 100 PID 2244 wrote to memory of 5076 2244 build2.exe 100 PID 440 wrote to memory of 316 440 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 102 PID 440 wrote to memory of 316 440 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 102 PID 440 wrote to memory of 316 440 817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe 102 PID 316 wrote to memory of 3228 316 build3.exe 109 PID 316 wrote to memory of 3228 316 build3.exe 109 PID 316 wrote to memory of 3228 316 build3.exe 109 PID 316 wrote to memory of 3228 316 build3.exe 109 PID 316 wrote to memory of 3228 316 build3.exe 109 PID 316 wrote to memory of 3228 316 build3.exe 109 PID 316 wrote to memory of 3228 316 build3.exe 109 PID 316 wrote to memory of 3228 316 build3.exe 109 PID 316 wrote to memory of 3228 316 build3.exe 109 PID 3228 wrote to memory of 1544 3228 build3.exe 110 PID 3228 wrote to memory of 1544 3228 build3.exe 110 PID 3228 wrote to memory of 1544 3228 build3.exe 110
Processes
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C:\Users\Admin\AppData\Local\Temp\817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe"C:\Users\Admin\AppData\Local\Temp\817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2080 -
C:\Users\Admin\AppData\Local\Temp\817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe"C:\Users\Admin\AppData\Local\Temp\817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1540 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\96efd875-7879-49b0-b194-f3e002077395" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:952
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C:\Users\Admin\AppData\Local\Temp\817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe"C:\Users\Admin\AppData\Local\Temp\817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1748 -
C:\Users\Admin\AppData\Local\Temp\817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe"C:\Users\Admin\AppData\Local\Temp\817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:440 -
C:\Users\Admin\AppData\Local\50fae896-0745-472a-98d3-0201bee9b730\build2.exe"C:\Users\Admin\AppData\Local\50fae896-0745-472a-98d3-0201bee9b730\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2244 -
C:\Users\Admin\AppData\Local\50fae896-0745-472a-98d3-0201bee9b730\build2.exe"C:\Users\Admin\AppData\Local\50fae896-0745-472a-98d3-0201bee9b730\build2.exe"6⤵
- Executes dropped EXE
PID:5076 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 5076 -s 21727⤵
- Program crash
PID:1688
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C:\Users\Admin\AppData\Local\50fae896-0745-472a-98d3-0201bee9b730\build3.exe"C:\Users\Admin\AppData\Local\50fae896-0745-472a-98d3-0201bee9b730\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:316 -
C:\Users\Admin\AppData\Local\50fae896-0745-472a-98d3-0201bee9b730\build3.exe"C:\Users\Admin\AppData\Local\50fae896-0745-472a-98d3-0201bee9b730\build3.exe"6⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3228 -
C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"7⤵
- Creates scheduled task(s)
PID:1544
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 5076 -ip 50761⤵PID:4836
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C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe1⤵
- Executes dropped EXE
PID:3504
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
MD5e03f10ddbb0600e6b05e45889577c078
SHA1d6a0476b5157fd39b8d7e87cada0913fe89d9227
SHA2565a7ccfd3b4012748c70631674957a82fd7507b719f1c13498336dbd20de841e2
SHA512f2f5d4ec612ec23ab5fdec665896bc288d538b77a708766bdf29eb0827a6de030889ac97e75d2a9f8143e75fb5d512589944d91acb628b3e45750c89a55db312
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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
MD50f5882b534c0a558525162f55a6099c6
SHA18ed8683013c44ad3d60f496f85ce10aafd57e86c
SHA256fad8618cf204b70a5e9e1d3a5dfc915625da709f6a29985b9c0bdc5fae2c3935
SHA512df4e3ffb4669d4edfbf0b8adcf16027f841a08ac9acec5638445d0c71d54c22ffce524b45aa72dd267eff92b91a3e81733ddd65b7877bbe3e9e091c6099daa46
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD53b377b5948e12542d90c2171aa70bcf4
SHA1b6a6ce808df1434d6681f60bfa21a86160e8ca8f
SHA25630f0682b22e5746f28523df75f8b0859ef880ed5307ea5579d9fa49845b324c4
SHA512b56a55bff4ff3e4e60aa0f790f24b6bad8607cf8bf351793bb4f73ed17839f04e2c0a626f174f6fb4de04347be209775af7e282740a14d1010d5c2baeb19ca95
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Filesize
277KB
MD58dae8b6a6be6e3527183594d1c26a2d3
SHA1b87e40cee60869a36e79c88c8a3a34baf0bc4889
SHA256afce72cd3bc717c784962083066e3ede2b0aaadbe0908ec7360096c923774fa5
SHA5120bf065700db647efba39a13a58242a595907e6c11885575cf0bdad9e23ab40583c8a6535464e46d75d075e20d88b7a6305a761df9da787fdc8728483dd48f96e
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Filesize
299KB
MD541b883a061c95e9b9cb17d4ca50de770
SHA11daf96ec21d53d9a4699cea9b4db08cda6fbb5ad
SHA256fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408
SHA512cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319
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C:\Users\Admin\AppData\Local\96efd875-7879-49b0-b194-f3e002077395\817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb.exe
Filesize732KB
MD5ec1b4124cea7ec9f0173b8742e525b94
SHA1b8a59973e6b06339fb92373ea9f434a5418d2663
SHA256817d98223a4947b1f6c7c842bfe080ee76228ca968bc5e25cc52a03004af28fb
SHA512f376bdb59f2b88c135e9013a435872248ea9a0a86859c1b65c9092870edb17075dec05910cda0725f0f12193565263f100a5095d30ec8c3993ce99985dbbdc13