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Analysis
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max time kernel
148s -
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
06/04/2024, 21:35
Static task
static1
Behavioral task
behavioral1
Sample
f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral2
Sample
f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe
Resource
win11-20240221-en
General
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Target
f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe
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Size
745KB
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MD5
db45443586d5e4d78ce547cc809af356
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SHA1
8e360a89ddf44358876b60ff17e20c2375ba2f80
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SHA256
f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b
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SHA512
687b3b033370ba9becf095e1dc5aeccc2db745a84f7b3ececdb463e65856caa0dd0158d722144f6a605027bfeb44f52cb12e3f593282926046aee387a52f1c55
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SSDEEP
12288:0dlg0H/qp2xYQZNONtuoBLP66Ff59lhP30GSBNRmVUZzmhhUGcbvv:0deAqpG5OT/FFhMRMVUihhUx7
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 behavioral1/memory/2572-2-0x0000000004AD0000-0x0000000004BEB000-memory.dmp family_djvu behavioral1/memory/3764-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3764-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3764-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3764-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3764-15-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2164-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2164-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2164-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2164-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2164-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2164-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2164-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2164-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2164-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2164-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2164-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Checks computer location settings 2 TTPs 1 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 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 2224 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\\73fb1565-7e91-4ae6-b972-d3bdf793871c\\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe\" --AutoStart" f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.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 14 api.2ip.ua 19 api.2ip.ua 13 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 2572 set thread context of 3764 2572 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 88 PID 1128 set thread context of 2164 1128 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 96 -
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 3764 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 3764 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 2164 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 2164 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 2572 wrote to memory of 3764 2572 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 88 PID 2572 wrote to memory of 3764 2572 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 88 PID 2572 wrote to memory of 3764 2572 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 88 PID 2572 wrote to memory of 3764 2572 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 88 PID 2572 wrote to memory of 3764 2572 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 88 PID 2572 wrote to memory of 3764 2572 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 88 PID 2572 wrote to memory of 3764 2572 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 88 PID 2572 wrote to memory of 3764 2572 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 88 PID 2572 wrote to memory of 3764 2572 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 88 PID 2572 wrote to memory of 3764 2572 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 88 PID 3764 wrote to memory of 2224 3764 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 91 PID 3764 wrote to memory of 2224 3764 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 91 PID 3764 wrote to memory of 2224 3764 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 91 PID 3764 wrote to memory of 1128 3764 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 92 PID 3764 wrote to memory of 1128 3764 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 92 PID 3764 wrote to memory of 1128 3764 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 92 PID 1128 wrote to memory of 2164 1128 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 96 PID 1128 wrote to memory of 2164 1128 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 96 PID 1128 wrote to memory of 2164 1128 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 96 PID 1128 wrote to memory of 2164 1128 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 96 PID 1128 wrote to memory of 2164 1128 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 96 PID 1128 wrote to memory of 2164 1128 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 96 PID 1128 wrote to memory of 2164 1128 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 96 PID 1128 wrote to memory of 2164 1128 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 96 PID 1128 wrote to memory of 2164 1128 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 96 PID 1128 wrote to memory of 2164 1128 f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe 96
Processes
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C:\Users\Admin\AppData\Local\Temp\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe"C:\Users\Admin\AppData\Local\Temp\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2572 -
C:\Users\Admin\AppData\Local\Temp\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe"C:\Users\Admin\AppData\Local\Temp\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3764 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\73fb1565-7e91-4ae6-b972-d3bdf793871c" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2224
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C:\Users\Admin\AppData\Local\Temp\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe"C:\Users\Admin\AppData\Local\Temp\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1128 -
C:\Users\Admin\AppData\Local\Temp\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe"C:\Users\Admin\AppData\Local\Temp\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2164
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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
MD538fe440dcb41bf01baa39153169a3d74
SHA174a11892ffb1e9baf34fca27ce617993a3221080
SHA25680c40063d4b3729809906924dd55487a4f20c5bc8aeefa8cfc313dc532f7e423
SHA512eaf66971a2b57aa93c9fb3c2d25759174dfb0a90d61f2589aeee59d3c540b5cbd9fb669891616e57b41d66b41b6586c3724d3b02f91a86bb7bd905bf2faac31c
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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
MD57fced6d76d82044e78e0c08c443079c2
SHA129c2d428e7d9a56a6bf3d04c8e3af900dbe0158f
SHA25677cb4a7b7f3ca860907393d270a712bfdf10290d24a5f78ab4a916bdc9e5435d
SHA512fc690e3541d4d9aee815227e1363cf0740008279639ff4b7ebd1a63af1826d44f199741107d43082dfb0ce672412cd35d553ae598f8c143664426b51e0033f39
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD512eb31545ecb648063b59b6fd8d6b498
SHA1c2f2e3eb3fe8a25ecb02132c71ecf21fa5eb6a12
SHA2563efffa605924172d35761fa1725290dfe505e988c37f89bcb93844dc9b44fb6b
SHA512e98e48947f350a54ea9376ed1581458d2e02ce70a88fac7ca2b65708e60f1e4d3ddb64669ed616469f931a47b6a47892b4f90000790197c954d50aa9fa587325
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C:\Users\Admin\AppData\Local\73fb1565-7e91-4ae6-b972-d3bdf793871c\f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b.exe
Filesize745KB
MD5db45443586d5e4d78ce547cc809af356
SHA18e360a89ddf44358876b60ff17e20c2375ba2f80
SHA256f35a051f2c35585aec7f30f2aabb5dcc413f20fd89de031b47f5ccb3c6e37d0b
SHA512687b3b033370ba9becf095e1dc5aeccc2db745a84f7b3ececdb463e65856caa0dd0158d722144f6a605027bfeb44f52cb12e3f593282926046aee387a52f1c55