Analysis
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max time kernel
144s -
max time network
146s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
26/01/2024, 08:54
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
file.exe
Resource
win10v2004-20231222-en
General
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Target
file.exe
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Size
749KB
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MD5
87ba288f14fbf826d4cf061d9f8e72ed
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SHA1
ec1f877e40b5e8917953e54eb51834a15335aa6e
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SHA256
56529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63
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SHA512
200457f3c9f1120c6c97df354d7e9898e0a3dfecb6fb771985f9e28adaab29841e03e37e1100b759ae7baf89072859082aa3ddc340a8501396426441f8391f95
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SSDEEP
12288:lL++FQkxaH3tr2VBEMuw6mQVSql6SoP0bSJg5J8m5ubKrD4Akb5i2yj5+:U+FQkxI2E5oPI0Kp5ubKX4S+
Malware Config
Extracted
djvu
http://habrafa.com/test2/get.php
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extension
.cdxx
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offline_id
LBxKKiegnAy53rpqH3Pj2j46vwldiEt9kqHSuMt1
- payload_url
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ransomnote
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Signatures
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Detected Djvu ransomware 16 IoCs
resource yara_rule behavioral2/memory/4016-1-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4016-2-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4032-0-0x0000000004910000-0x0000000004A2B000-memory.dmp family_djvu behavioral2/memory/4016-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4016-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4016-15-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4936-18-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4936-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4936-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4936-25-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4936-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4936-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4936-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4936-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4936-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4936-36-0x0000000000400000-0x0000000000537000-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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation file.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 4500 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\58b1247e-b89b-44ee-9eb4-235719ffcfba\\file.exe\" --AutoStart" file.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 17 api.2ip.ua 3 api.2ip.ua 5 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 4032 set thread context of 4016 4032 file.exe 38 PID 4544 set thread context of 4936 4544 file.exe 93 -
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 4016 file.exe 4016 file.exe 4936 file.exe 4936 file.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 4032 wrote to memory of 4016 4032 file.exe 38 PID 4032 wrote to memory of 4016 4032 file.exe 38 PID 4032 wrote to memory of 4016 4032 file.exe 38 PID 4032 wrote to memory of 4016 4032 file.exe 38 PID 4032 wrote to memory of 4016 4032 file.exe 38 PID 4032 wrote to memory of 4016 4032 file.exe 38 PID 4032 wrote to memory of 4016 4032 file.exe 38 PID 4032 wrote to memory of 4016 4032 file.exe 38 PID 4032 wrote to memory of 4016 4032 file.exe 38 PID 4032 wrote to memory of 4016 4032 file.exe 38 PID 4016 wrote to memory of 4500 4016 file.exe 90 PID 4016 wrote to memory of 4500 4016 file.exe 90 PID 4016 wrote to memory of 4500 4016 file.exe 90 PID 4016 wrote to memory of 4544 4016 file.exe 92 PID 4016 wrote to memory of 4544 4016 file.exe 92 PID 4016 wrote to memory of 4544 4016 file.exe 92 PID 4544 wrote to memory of 4936 4544 file.exe 93 PID 4544 wrote to memory of 4936 4544 file.exe 93 PID 4544 wrote to memory of 4936 4544 file.exe 93 PID 4544 wrote to memory of 4936 4544 file.exe 93 PID 4544 wrote to memory of 4936 4544 file.exe 93 PID 4544 wrote to memory of 4936 4544 file.exe 93 PID 4544 wrote to memory of 4936 4544 file.exe 93 PID 4544 wrote to memory of 4936 4544 file.exe 93 PID 4544 wrote to memory of 4936 4544 file.exe 93 PID 4544 wrote to memory of 4936 4544 file.exe 93
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4032 -
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4016 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\58b1247e-b89b-44ee-9eb4-235719ffcfba" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4500
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4544 -
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4936
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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
MD573ce21ff1fb2989f6350ace9274ae9b5
SHA17db6c387eb8351f3e8e361d10224711c3477821e
SHA256d7005273bab949c42fcc73eac7820c4c5f08df1e9095020cdb0e17fc9e282d50
SHA512a43767a55a559a8bf51d5dcb9bc378167f63e15f571b6be35903048570d036fed2a3f6a37c91f469ee9808d245cdd875b9dad38556e6bf97258a82c7071aeab3
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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
MD58d699eccc391891118788b5140c392d7
SHA1b746335bdc2f7cc722e4c60eb2209cd9fffcdcfa
SHA2560c6fe140d4e226a13ada3e6fe23429e1fc83f46a681ad907f19f8b8ce38b0e38
SHA512b00fcb838e80688687d802b4aaee77013b6980a6fbd20a3535813253d97603fd6a7e6373a5a38a991a4d0cb5b3fb5679f7c1f03fad4b0e4b1391902cb07ae49a
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5e47a00c22ee8a74aeef59ac8230551d3
SHA15adb725d25f23de452800f3b0eca1c50673661e0
SHA256d0b33662c0cbf1a33a5d552cd92a42a69b48604d9cc1900d0720a235d027c7d5
SHA5121aabaf21b2fa7fd0f1a4245f0d72538e5c481b1acf6636c4f48c5916addbdb05264fd223c83e1add425b97c05c119f5354703455ca867c5cd1ae7ebdc8c32aca
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Filesize
749KB
MD587ba288f14fbf826d4cf061d9f8e72ed
SHA1ec1f877e40b5e8917953e54eb51834a15335aa6e
SHA25656529b359e4c4695a3e290752d61c59ad3327a16574da95ca69a214552241a63
SHA512200457f3c9f1120c6c97df354d7e9898e0a3dfecb6fb771985f9e28adaab29841e03e37e1100b759ae7baf89072859082aa3ddc340a8501396426441f8391f95