Analysis
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max time kernel
119s -
max time network
177s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
01-10-2022 22:36
Static task
static1
Behavioral task
behavioral1
Sample
ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe
Resource
win10v2004-20220812-en
General
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Target
ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe
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Size
392KB
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MD5
d4bb706e3e461f1ccf390fc2fc786faf
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SHA1
94b8dee04b501862d4b66f376a806ccaaebb4122
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SHA256
ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56
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SHA512
384a5639ed3e9074600430183634ba7bd52b26190041241012970e164dc6f08e6b4eef5f8d4ba9ab4ff79ad01cd08ed93e7f7e0b62662a5cce80fb2b80dee3cb
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SSDEEP
12288:xZNq9Q5uxGnhiqti9tb/eT3BK/AMKEOL+:xua2GnUqtYyT8/xOL+
Malware Config
Signatures
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ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
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ISR Stealer payload 4 IoCs
resource yara_rule behavioral2/memory/3796-137-0x0000000000400000-0x0000000000442000-memory.dmp family_isrstealer behavioral2/memory/3796-142-0x0000000000400000-0x0000000000442000-memory.dmp family_isrstealer behavioral2/memory/3796-150-0x0000000000400000-0x0000000000442000-memory.dmp family_isrstealer behavioral2/memory/3796-158-0x0000000000400000-0x0000000000442000-memory.dmp family_isrstealer -
NirSoft MailPassView 3 IoCs
Password recovery tool for various email clients
resource yara_rule behavioral2/memory/3812-155-0x0000000000400000-0x000000000041F000-memory.dmp MailPassView behavioral2/memory/3812-156-0x0000000000400000-0x000000000041F000-memory.dmp MailPassView behavioral2/memory/3812-157-0x0000000000400000-0x000000000041F000-memory.dmp MailPassView -
Nirsoft 3 IoCs
resource yara_rule behavioral2/memory/3812-155-0x0000000000400000-0x000000000041F000-memory.dmp Nirsoft behavioral2/memory/3812-156-0x0000000000400000-0x000000000041F000-memory.dmp Nirsoft behavioral2/memory/3812-157-0x0000000000400000-0x000000000041F000-memory.dmp Nirsoft -
resource yara_rule behavioral2/memory/3500-144-0x0000000000400000-0x0000000000453000-memory.dmp upx behavioral2/memory/3500-146-0x0000000000400000-0x0000000000453000-memory.dmp upx behavioral2/memory/3500-147-0x0000000000400000-0x0000000000453000-memory.dmp upx behavioral2/memory/3500-148-0x0000000000400000-0x0000000000453000-memory.dmp upx behavioral2/memory/3812-152-0x0000000000400000-0x000000000041F000-memory.dmp upx behavioral2/memory/3812-154-0x0000000000400000-0x000000000041F000-memory.dmp upx behavioral2/memory/3812-155-0x0000000000400000-0x000000000041F000-memory.dmp upx behavioral2/memory/3812-156-0x0000000000400000-0x000000000041F000-memory.dmp upx behavioral2/memory/3812-157-0x0000000000400000-0x000000000041F000-memory.dmp upx -
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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe -
Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts cvtres.exe -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run reg.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XGdES9N8RW = "C:\\Users\\Admin\\AppData\\Roaming\\dGNIWZiH\\seb2plM.exe.lnk" reg.exe -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 4764 set thread context of 3796 4764 ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe 92 PID 3796 set thread context of 3500 3796 cvtres.exe 93 PID 3796 set thread context of 3812 3796 cvtres.exe 97 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 4764 ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe 4764 ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4764 ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 3796 cvtres.exe -
Suspicious use of WriteProcessMemory 29 IoCs
description pid Process procid_target PID 4764 wrote to memory of 2864 4764 ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe 88 PID 4764 wrote to memory of 2864 4764 ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe 88 PID 4764 wrote to memory of 2864 4764 ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe 88 PID 2864 wrote to memory of 2312 2864 cmd.exe 90 PID 2864 wrote to memory of 2312 2864 cmd.exe 90 PID 2864 wrote to memory of 2312 2864 cmd.exe 90 PID 4764 wrote to memory of 3796 4764 ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe 92 PID 4764 wrote to memory of 3796 4764 ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe 92 PID 4764 wrote to memory of 3796 4764 ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe 92 PID 4764 wrote to memory of 3796 4764 ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe 92 PID 4764 wrote to memory of 3796 4764 ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe 92 PID 4764 wrote to memory of 3796 4764 ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe 92 PID 4764 wrote to memory of 3796 4764 ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe 92 PID 3796 wrote to memory of 3500 3796 cvtres.exe 93 PID 3796 wrote to memory of 3500 3796 cvtres.exe 93 PID 3796 wrote to memory of 3500 3796 cvtres.exe 93 PID 3796 wrote to memory of 3500 3796 cvtres.exe 93 PID 3796 wrote to memory of 3500 3796 cvtres.exe 93 PID 3796 wrote to memory of 3500 3796 cvtres.exe 93 PID 3796 wrote to memory of 3500 3796 cvtres.exe 93 PID 3796 wrote to memory of 3500 3796 cvtres.exe 93 PID 3796 wrote to memory of 3812 3796 cvtres.exe 97 PID 3796 wrote to memory of 3812 3796 cvtres.exe 97 PID 3796 wrote to memory of 3812 3796 cvtres.exe 97 PID 3796 wrote to memory of 3812 3796 cvtres.exe 97 PID 3796 wrote to memory of 3812 3796 cvtres.exe 97 PID 3796 wrote to memory of 3812 3796 cvtres.exe 97 PID 3796 wrote to memory of 3812 3796 cvtres.exe 97 PID 3796 wrote to memory of 3812 3796 cvtres.exe 97
Processes
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C:\Users\Admin\AppData\Local\Temp\ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe"C:\Users\Admin\AppData\Local\Temp\ac2cfb961139a24edca708958b6f6a72666f3f711696065435fcf169bee64a56.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4764 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "XGdES9N8RW" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\dGNIWZiH\seb2plM.exe.lnk"2⤵
- Suspicious use of WriteProcessMemory
PID:2864 -
C:\Windows\SysWOW64\reg.exereg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "XGdES9N8RW" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\dGNIWZiH\seb2plM.exe.lnk"3⤵
- Adds Run key to start application
PID:2312
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C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe"C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe"2⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3796 -
C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe/scomma "C:\Users\Admin\AppData\Local\Temp\dEU3zCj7jT.ini"3⤵PID:3500
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C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe/scomma "C:\Users\Admin\AppData\Local\Temp\XMNmOabcSk.ini"3⤵
- Accesses Microsoft Outlook accounts
PID:3812
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
5B
MD5d1ea279fb5559c020a1b4137dc4de237
SHA1db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3