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Analysis
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max time kernel
139s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20230915-en -
resource tags
arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system -
submitted
14/10/2023, 03:30
Static task
static1
Behavioral task
behavioral1
Sample
b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe
Resource
win10v2004-20230915-en
General
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Target
b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe
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Size
809KB
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MD5
0c2114f292da69f8b82e78a1a8441649
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SHA1
908a6fd97369255fa3fca0fede95e0a985cce375
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SHA256
b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502
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SHA512
bad5cb1ae71dee29e22729e06eb2293a8b92093b7fbcdf41813427a638b816b4394afa4ad1a69e3c7ee97d153473f5dbe68f78be6fe8037180c8ca55a72e5fb2
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SSDEEP
12288:eMb3r6sp6A3X39nZgbsPt3hb/QusXDNE8M/hlMbH3JfkLd052ksYT:eMbu4H39nZg4FRbnszNE868RkOr
Malware Config
Extracted
djvu
http://zexeq.com/raud/get.php
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extension
.ooza
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offline_id
dhL6XvokZotUzL67Na5WfNIBufODsob7eYc3mzt1
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payload_url
http://colisumy.com/dl/build2.exe
http://zexeq.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 9 IoCs
resource yara_rule behavioral2/memory/2020-2-0x0000000004110000-0x000000000422B000-memory.dmp family_djvu behavioral2/memory/2004-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2004-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2004-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2004-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2004-15-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4308-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4308-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4308-23-0x0000000000400000-0x0000000000537000-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-1-5-21-3027552071-446050021-1254071215-1000\Control Panel\International\Geo\Nation b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 3488 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3027552071-446050021-1254071215-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\af21e22b-3197-4714-9004-b8b5647f7841\\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe\" --AutoStart" b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe -
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 18 api.2ip.ua 19 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 2020 set thread context of 2004 2020 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 87 PID 5084 set thread context of 4308 5084 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 91 -
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 3080 4308 WerFault.exe 91 -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 2004 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 2004 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 2020 wrote to memory of 2004 2020 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 87 PID 2020 wrote to memory of 2004 2020 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 87 PID 2020 wrote to memory of 2004 2020 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 87 PID 2020 wrote to memory of 2004 2020 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 87 PID 2020 wrote to memory of 2004 2020 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 87 PID 2020 wrote to memory of 2004 2020 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 87 PID 2020 wrote to memory of 2004 2020 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 87 PID 2020 wrote to memory of 2004 2020 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 87 PID 2020 wrote to memory of 2004 2020 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 87 PID 2020 wrote to memory of 2004 2020 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 87 PID 2004 wrote to memory of 3488 2004 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 88 PID 2004 wrote to memory of 3488 2004 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 88 PID 2004 wrote to memory of 3488 2004 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 88 PID 2004 wrote to memory of 5084 2004 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 89 PID 2004 wrote to memory of 5084 2004 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 89 PID 2004 wrote to memory of 5084 2004 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 89 PID 5084 wrote to memory of 4308 5084 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 91 PID 5084 wrote to memory of 4308 5084 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 91 PID 5084 wrote to memory of 4308 5084 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 91 PID 5084 wrote to memory of 4308 5084 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 91 PID 5084 wrote to memory of 4308 5084 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 91 PID 5084 wrote to memory of 4308 5084 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 91 PID 5084 wrote to memory of 4308 5084 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 91 PID 5084 wrote to memory of 4308 5084 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 91 PID 5084 wrote to memory of 4308 5084 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 91 PID 5084 wrote to memory of 4308 5084 b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe"C:\Users\Admin\AppData\Local\Temp\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2020 -
C:\Users\Admin\AppData\Local\Temp\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe"C:\Users\Admin\AppData\Local\Temp\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2004 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\af21e22b-3197-4714-9004-b8b5647f7841" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:3488
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C:\Users\Admin\AppData\Local\Temp\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe"C:\Users\Admin\AppData\Local\Temp\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5084 -
C:\Users\Admin\AppData\Local\Temp\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe"C:\Users\Admin\AppData\Local\Temp\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe" --Admin IsNotAutoStart IsNotTask4⤵PID:4308
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4308 -s 5685⤵
- Program crash
PID:3080
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4308 -ip 43081⤵PID:1808
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\af21e22b-3197-4714-9004-b8b5647f7841\b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502.exe
Filesize809KB
MD50c2114f292da69f8b82e78a1a8441649
SHA1908a6fd97369255fa3fca0fede95e0a985cce375
SHA256b8bab1dc91278db234438483c3619bc310e1969db6405533fc836aad60a7e502
SHA512bad5cb1ae71dee29e22729e06eb2293a8b92093b7fbcdf41813427a638b816b4394afa4ad1a69e3c7ee97d153473f5dbe68f78be6fe8037180c8ca55a72e5fb2