Analysis
- max time kernel
90s - max time network
158s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
01/02/2024, 08:18
General
- Target 8663ed0caec9adcb980a4a7ea23e7984.exe
- Size 1.3MB
- Sample240201-j7m23shcel
- SHA256 bbe006688e5f74473a5e248bc83651cbb7e9efbe8410abb8d8b84b4a59ed7750
Malware Config
Extracted
-
oski
-
fine.le-pearl.com
Signatures
- Oski
Oski is an infostealer targeting browser data, crypto wallets.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 9 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of WriteProcessMemory 24 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\8663ed0caec9adcb980a4a7ea23e7984.exe"C:\Users\Admin\AppData\Local\Temp\8663ed0caec9adcb980a4a7ea23e7984.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\8663ed0caec9adcb980a4a7ea23e7984.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\ImauUieIe.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ImauUieIe" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF48.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\8663ed0caec9adcb980a4a7ea23e7984.exe"C:\Users\Admin\AppData\Local\Temp\8663ed0caec9adcb980a4a7ea23e7984.exe"2⤵
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C:\Users\Admin\AppData\Local\Temp\8663ed0caec9adcb980a4a7ea23e7984.exe"C:\Users\Admin\AppData\Local\Temp\8663ed0caec9adcb980a4a7ea23e7984.exe"2⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3808 -s 13283⤵
- Program crash
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\ImauUieIe.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3808 -ip 38081⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
powershell.exe.log
suspendedpage[1].htm
StartupProfileData-NonInteractive
__PSScriptPolicyTest_1jx5o5fh.fct.ps1
tmpF48.tmp
memory/388-132-0x0000000007070000-0x0000000007078000-memory.dmp
memory/388-23-0x0000000004530000-0x0000000004540000-memory.dmp
memory/388-142-0x0000000074B40000-0x00000000752F0000-memory.dmp
memory/388-87-0x000000007FD60000-0x000000007FD70000-memory.dmp
memory/388-90-0x0000000071330000-0x000000007137C000-memory.dmp
memory/388-27-0x0000000005380000-0x00000000053E6000-memory.dmp
memory/388-126-0x0000000006FD0000-0x0000000007066000-memory.dmp
memory/388-124-0x0000000006D50000-0x0000000006D6A000-memory.dmp
memory/388-131-0x0000000007090000-0x00000000070AA000-memory.dmp
memory/388-122-0x0000000006C60000-0x0000000006D03000-memory.dmp
memory/388-66-0x0000000005A60000-0x0000000005AAC000-memory.dmp
memory/388-21-0x0000000074B40000-0x00000000752F0000-memory.dmp
memory/388-22-0x0000000004530000-0x0000000004540000-memory.dmp
memory/388-26-0x00000000051A0000-0x0000000005206000-memory.dmp
memory/388-25-0x0000000004A30000-0x0000000004A52000-memory.dmp
memory/2368-10-0x0000000007BE0000-0x0000000007C80000-memory.dmp
memory/2368-7-0x00000000027F0000-0x0000000002802000-memory.dmp
memory/2368-11-0x0000000000830000-0x0000000000868000-memory.dmp
memory/2368-5-0x0000000004D70000-0x0000000004D7A000-memory.dmp
memory/2368-4-0x0000000005060000-0x0000000005070000-memory.dmp
memory/2368-3-0x0000000004D90000-0x0000000004E22000-memory.dmp
memory/2368-6-0x0000000005110000-0x00000000051AC000-memory.dmp
memory/2368-9-0x0000000005060000-0x0000000005070000-memory.dmp
memory/2368-2-0x0000000005430000-0x00000000059D4000-memory.dmp
memory/2368-52-0x0000000074B40000-0x00000000752F0000-memory.dmp
memory/2368-1-0x0000000000230000-0x0000000000382000-memory.dmp
memory/2368-0-0x0000000074B40000-0x00000000752F0000-memory.dmp
memory/2368-8-0x0000000074B40000-0x00000000752F0000-memory.dmp
memory/3612-16-0x0000000074B40000-0x00000000752F0000-memory.dmp
memory/3612-111-0x00000000065A0000-0x00000000065BE000-memory.dmp
memory/3612-141-0x0000000074B40000-0x00000000752F0000-memory.dmp
memory/3612-81-0x0000000004B50000-0x0000000004B60000-memory.dmp
memory/3612-51-0x00000000059B0000-0x0000000005D04000-memory.dmp
memory/3612-86-0x0000000074B40000-0x00000000752F0000-memory.dmp
memory/3612-14-0x00000000049F0000-0x0000000004A26000-memory.dmp
memory/3612-129-0x0000000007530000-0x000000000753E000-memory.dmp
memory/3612-110-0x000000007FA30000-0x000000007FA40000-memory.dmp
memory/3612-65-0x0000000004D40000-0x0000000004D5E000-memory.dmp
memory/3612-17-0x0000000004B50000-0x0000000004B60000-memory.dmp
memory/3612-19-0x0000000004B50000-0x0000000004B60000-memory.dmp
memory/3612-89-0x0000000071330000-0x000000007137C000-memory.dmp
memory/3612-20-0x0000000005190000-0x00000000057B8000-memory.dmp
memory/3808-28-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3808-29-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3808-128-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3808-41-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3808-42-0x0000000000400000-0x0000000000438000-memory.dmp
memory/4524-54-0x00000000055D0000-0x00000000055E0000-memory.dmp
memory/4524-127-0x0000000007E20000-0x0000000007E31000-memory.dmp
memory/4524-125-0x0000000007C90000-0x0000000007C9A000-memory.dmp
memory/4524-130-0x0000000007E60000-0x0000000007E74000-memory.dmp
memory/4524-123-0x0000000008270000-0x00000000088EA000-memory.dmp
memory/4524-88-0x0000000006ED0000-0x0000000006F02000-memory.dmp
memory/4524-91-0x000000007F8B0000-0x000000007F8C0000-memory.dmp
memory/4524-92-0x0000000071330000-0x000000007137C000-memory.dmp
memory/4524-84-0x00000000055D0000-0x00000000055E0000-memory.dmp
memory/4524-140-0x0000000074B40000-0x00000000752F0000-memory.dmp
memory/4524-55-0x00000000055D0000-0x00000000055E0000-memory.dmp
memory/4524-53-0x0000000074B40000-0x00000000752F0000-memory.dmp