Analysis
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max time kernel
159s -
max time network
204s -
platform
windows10-2004_x64 -
resource
win10v2004-20230915-en -
resource tags
arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system -
submitted
12/10/2023, 10:38
Static task
static1
Behavioral task
behavioral1
Sample
97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe
Resource
win10v2004-20230915-en
General
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Target
97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe
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Size
738KB
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MD5
a728ffeedadb894aa1db6c01e9e3920f
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SHA1
3a00d95c56cb353486a4c7deeebf33e13951428d
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SHA256
97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc
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SHA512
74c7b08285fe94d90239ac8781687f89ec9da57045a612de5cac1a895eee3bf037e24a1ca5a5491f44ba5892ea06a4a6f542c6e53eeece20531ddfd6ed3d2bcd
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SSDEEP
12288:NoQ9ym7sbNqZhrTX3qXqh4n8gxXuJSTCZoZmoowiA1aWDY1e2SSPiNN:NoQcm/qXqh4nJXOPkLionDPk2N
Malware Config
Extracted
djvu
http://zexeq.com/test1/get.php
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extension
.wwpl
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offline_id
LtYnlJvK0hICyOCeum6Tv4pbia9jcIGHVgA3Xht1
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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 10 IoCs
resource yara_rule behavioral2/memory/1676-1-0x0000000002320000-0x000000000243B000-memory.dmp family_djvu behavioral2/memory/4056-2-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4056-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4056-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4056-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4056-15-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4056-18-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3084-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3084-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3084-26-0x0000000000400000-0x0000000000537000-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-1-5-21-1045988481-1457812719-2617974652-1000\Control Panel\International\Geo\Nation 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 2028 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1045988481-1457812719-2617974652-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\53ee8169-bceb-4fb0-acd3-931dec043476\\97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe\" --AutoStart" 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.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 24 api.2ip.ua 23 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 1676 set thread context of 4056 1676 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 84 PID 5044 set thread context of 3084 5044 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 92 -
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 1148 3084 WerFault.exe 92 -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 4056 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 4056 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 1676 wrote to memory of 4056 1676 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 84 PID 1676 wrote to memory of 4056 1676 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 84 PID 1676 wrote to memory of 4056 1676 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 84 PID 1676 wrote to memory of 4056 1676 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 84 PID 1676 wrote to memory of 4056 1676 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 84 PID 1676 wrote to memory of 4056 1676 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 84 PID 1676 wrote to memory of 4056 1676 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 84 PID 1676 wrote to memory of 4056 1676 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 84 PID 1676 wrote to memory of 4056 1676 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 84 PID 1676 wrote to memory of 4056 1676 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 84 PID 4056 wrote to memory of 2028 4056 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 85 PID 4056 wrote to memory of 2028 4056 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 85 PID 4056 wrote to memory of 2028 4056 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 85 PID 4056 wrote to memory of 5044 4056 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 89 PID 4056 wrote to memory of 5044 4056 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 89 PID 4056 wrote to memory of 5044 4056 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 89 PID 5044 wrote to memory of 3084 5044 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 92 PID 5044 wrote to memory of 3084 5044 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 92 PID 5044 wrote to memory of 3084 5044 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 92 PID 5044 wrote to memory of 3084 5044 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 92 PID 5044 wrote to memory of 3084 5044 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 92 PID 5044 wrote to memory of 3084 5044 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 92 PID 5044 wrote to memory of 3084 5044 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 92 PID 5044 wrote to memory of 3084 5044 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 92 PID 5044 wrote to memory of 3084 5044 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 92 PID 5044 wrote to memory of 3084 5044 97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe 92
Processes
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C:\Users\Admin\AppData\Local\Temp\97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe"C:\Users\Admin\AppData\Local\Temp\97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1676 -
C:\Users\Admin\AppData\Local\Temp\97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe"C:\Users\Admin\AppData\Local\Temp\97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4056 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\53ee8169-bceb-4fb0-acd3-931dec043476" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2028
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C:\Users\Admin\AppData\Local\Temp\97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe"C:\Users\Admin\AppData\Local\Temp\97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5044 -
C:\Users\Admin\AppData\Local\Temp\97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe"C:\Users\Admin\AppData\Local\Temp\97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe" --Admin IsNotAutoStart IsNotTask4⤵PID:3084
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 5685⤵
- Program crash
PID:1148
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3084 -ip 30841⤵PID:2548
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\53ee8169-bceb-4fb0-acd3-931dec043476\97f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc.exe
Filesize738KB
MD5a728ffeedadb894aa1db6c01e9e3920f
SHA13a00d95c56cb353486a4c7deeebf33e13951428d
SHA25697f5ba88957bcddbe310c6636e508b4621834955e2177d8d4bc9eb7faa90e2dc
SHA51274c7b08285fe94d90239ac8781687f89ec9da57045a612de5cac1a895eee3bf037e24a1ca5a5491f44ba5892ea06a4a6f542c6e53eeece20531ddfd6ed3d2bcd