Analysis
- max time kernel
148s - max time network
129s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
09/10/2026, 18:41
General
- Target jaffacakes118_Trojan-Dropper.Win32.Fimarker.exe
- Size 696KB
- Sample261009-xb3pjsdf65
- SHA256 5b9128e5ba4e11988a013ed7b145148cd2c992209a49016f09c3b52677c8efa8
Malware Config
Signatures
- Loads dropped DLL 2 IoCs
- Enumerates connected drives 3 TTPs 46 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
- Installs/modifies Browser Helper Object 2 TTPs 1 IoCs
BHOs are DLL modules which act as plugins for Internet Explorer.
- UPX packed file 1 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Drops file in Windows directory 3 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 5 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Modifies registry class 3 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Dropper.Win32.Fimarker.exe"C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Dropper.Win32.Fimarker.exe"1⤵
- Installs/modifies Browser Helper Object
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe"C:\Windows\System32\regsvr32.exe" /s C:\WINDOWS\SYSTEM\msnie.dll2⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
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C:\Windows\SysWOW64\regsvr32.exe"C:\Windows\System32\regsvr32.exe" /s C:\WINDOWS\SYSTEM\bho2.dll2⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
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C:\Program Files (x86)\Windows Media Player\wmplayer.exe"C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /prefetch:9 /Open "C:\WINDOWS\TEMP\temp.mpeg"2⤵
- Enumerates connected drives
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\unregmp2.exe"C:\Windows\System32\unregmp2.exe" /AsyncFirstLogon3⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\unregmp2.exe"C:\Windows\SysNative\unregmp2.exe" /AsyncFirstLogon /REENTRANT4⤵
- Enumerates connected drives
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p -s upnphost1⤵
- Drops file in Windows directory
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
CurrentDatabase_400.wmdb
CurrentDatabase_400.wmdb
LocalMLS_3.wmdb
WMSDKNS.XML.bak
wmsetup.log
bho2.dll
msnie.dll
temp.mpeg
memory/1916-85-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-93-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-92-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-55-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-50-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-49-0x0000000006DD0000-0x0000000006DE0000-memory.dmp
memory/1916-63-0x0000000006DD0000-0x0000000006DE0000-memory.dmp
memory/1916-65-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-64-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-67-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-66-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-68-0x0000000006DD0000-0x0000000006DE0000-memory.dmp
memory/1916-69-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-70-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-71-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-72-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-73-0x0000000006DD0000-0x0000000006DE0000-memory.dmp
memory/1916-76-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-75-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-77-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-79-0x0000000006DD0000-0x0000000006DE0000-memory.dmp
memory/1916-78-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-80-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-81-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-83-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-82-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-84-0x0000000006DD0000-0x0000000006DE0000-memory.dmp
memory/1916-86-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-45-0x0000000006DD0000-0x0000000006DE0000-memory.dmp
memory/1916-87-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-89-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-90-0x0000000006DD0000-0x0000000006DE0000-memory.dmp
memory/1916-54-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-51-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-99-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-95-0x0000000006DD0000-0x0000000006DE0000-memory.dmp
memory/1916-94-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-96-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-97-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-98-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-100-0x0000000006DD0000-0x0000000006DE0000-memory.dmp
memory/1916-91-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-103-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-102-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-104-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-105-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-106-0x0000000006DD0000-0x0000000006DE0000-memory.dmp
memory/1916-107-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-108-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-109-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-110-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-111-0x0000000006DD0000-0x0000000006DE0000-memory.dmp
memory/1916-112-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-113-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-114-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-115-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-116-0x0000000006DD0000-0x0000000006DE0000-memory.dmp
memory/1916-119-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-118-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-121-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-120-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-122-0x0000000006DD0000-0x0000000006DE0000-memory.dmp
memory/1916-123-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/1916-124-0x00000000073E0000-0x00000000073F0000-memory.dmp
memory/4220-0-0x0000000000400000-0x000000000043D000-memory.dmp
memory/4220-12-0x0000000000400000-0x000000000043D000-memory.dmp