Analysis
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max time kernel
145s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
15/01/2024, 08:50
Static task
static1
Behavioral task
behavioral1
Sample
5ca3f45557b4e9c5b9c2ace9ae1a4752.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
5ca3f45557b4e9c5b9c2ace9ae1a4752.exe
Resource
win10v2004-20231215-en
General
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Target
5ca3f45557b4e9c5b9c2ace9ae1a4752.exe
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Size
729KB
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MD5
5ca3f45557b4e9c5b9c2ace9ae1a4752
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SHA1
8497aae4a8f26c94bdbd9478db8fd0a5479e81d2
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SHA256
66d68d69e8d3911c571276d89698732c17f35544c5884d548c9260adf01b9839
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SHA512
723171a94fdbbdb3f921ad8d6e63782b8fcebe3db88e1e6557c8ab2c8e897a90c6a673b32a64c2a32f81b472ff32483a7ac64e40c63f940c784cb423bac6b563
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SSDEEP
12288:dMUbKO9Y0irApn/w9tiKFJWP3vxSBh3XzwphP+2FTbvIjK8xf2U:mUFirA4n7aP3e3222FTrIjK8
Malware Config
Extracted
djvu
http://astdg.top/fhsgtsspen6/get.php
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extension
.nooa
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offline_id
PLtnD1U6oAmgxgJ2nJik1mY9SwUQg07CiN0zSet1
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payload_url
http://securebiz.org/dl/build2.exe
http://astdg.top/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 18 IoCs
resource yara_rule behavioral2/memory/1332-2-0x0000000004A10000-0x0000000004B2B000-memory.dmp family_djvu behavioral2/memory/4092-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4092-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4092-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4092-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4092-16-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/860-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/860-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/860-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/860-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/860-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/860-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/860-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/860-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/860-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/860-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/860-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/860-38-0x0000000000400000-0x0000000000537000-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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 2392 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-768304381-2824894965-3840216961-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\05eca6e0-e5ff-48c0-8c05-37cbb624f885\\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe\" --AutoStart" 5ca3f45557b4e9c5b9c2ace9ae1a4752.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 20 api.2ip.ua 13 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 1332 set thread context of 4092 1332 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 89 PID 4180 set thread context of 860 4180 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 97 -
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 4092 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 4092 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 860 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 860 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 1332 wrote to memory of 4092 1332 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 89 PID 1332 wrote to memory of 4092 1332 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 89 PID 1332 wrote to memory of 4092 1332 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 89 PID 1332 wrote to memory of 4092 1332 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 89 PID 1332 wrote to memory of 4092 1332 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 89 PID 1332 wrote to memory of 4092 1332 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 89 PID 1332 wrote to memory of 4092 1332 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 89 PID 1332 wrote to memory of 4092 1332 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 89 PID 1332 wrote to memory of 4092 1332 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 89 PID 1332 wrote to memory of 4092 1332 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 89 PID 4092 wrote to memory of 2392 4092 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 90 PID 4092 wrote to memory of 2392 4092 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 90 PID 4092 wrote to memory of 2392 4092 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 90 PID 4092 wrote to memory of 4180 4092 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 93 PID 4092 wrote to memory of 4180 4092 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 93 PID 4092 wrote to memory of 4180 4092 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 93 PID 4180 wrote to memory of 860 4180 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 97 PID 4180 wrote to memory of 860 4180 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 97 PID 4180 wrote to memory of 860 4180 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 97 PID 4180 wrote to memory of 860 4180 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 97 PID 4180 wrote to memory of 860 4180 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 97 PID 4180 wrote to memory of 860 4180 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 97 PID 4180 wrote to memory of 860 4180 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 97 PID 4180 wrote to memory of 860 4180 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 97 PID 4180 wrote to memory of 860 4180 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 97 PID 4180 wrote to memory of 860 4180 5ca3f45557b4e9c5b9c2ace9ae1a4752.exe 97
Processes
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C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe"C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1332 -
C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe"C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4092 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\05eca6e0-e5ff-48c0-8c05-37cbb624f885" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2392
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C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe"C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4180 -
C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe"C:\Users\Admin\AppData\Local\Temp\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:860
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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
MD5b7470a9aa569b259d4c2bb3b80ae3aa3
SHA1093290296b7f1e402ef96e4b33a88f064aa401eb
SHA256ee8aeed77dd9f1631fa75845214d75bfe04951a61892410ee369035e13fd14c6
SHA5124da3fc09260692f159c37b068664852931b712c8173de5e4b294799ac33ecf179055aaeb016fd0afad88cbfc50a571c4c88033dca56a573431af7462ea7979be
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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
MD5a6b9bf291eb2fba6054942b19caf34a6
SHA18907687ca7d66c8518f50df2695de5966f60e69d
SHA256d3ac5e897b373c3b74cefeb7f0c7f4798a472a53883fe073443db3630f7777a9
SHA5121043772a0cac5ed2fc382abe373a2d667a86974cd082319cf486608f064ee643c53e9349bbacc49d759932ba84c08644dd82f9468962533426a18cfee9e92247
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5adffb09b28da4972e42784a110a7d109
SHA1a6b5a1803e6cd823be0f5509d2993bbcc2fa012d
SHA256d938dec63ace855025e8dbaf47b661e413d6a588d76df4333519c0b303b17187
SHA512a7a132778bb9b404e44b9dee686c49ba35cf775bff18ee58bbe2d993442feb62b5c03370a75bf8f42334942787ae3124c4a8693da8bab0817d6846379b5408c7
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C:\Users\Admin\AppData\Local\05eca6e0-e5ff-48c0-8c05-37cbb624f885\5ca3f45557b4e9c5b9c2ace9ae1a4752.exe
Filesize729KB
MD55ca3f45557b4e9c5b9c2ace9ae1a4752
SHA18497aae4a8f26c94bdbd9478db8fd0a5479e81d2
SHA25666d68d69e8d3911c571276d89698732c17f35544c5884d548c9260adf01b9839
SHA512723171a94fdbbdb3f921ad8d6e63782b8fcebe3db88e1e6557c8ab2c8e897a90c6a673b32a64c2a32f81b472ff32483a7ac64e40c63f940c784cb423bac6b563