Analysis
- max time kernel
150s - max time network
127s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
14/10/2026, 04:04
General
- Target jaffacakes118_not-a-virus.HEUR.AdWare.Win32.BrainInst.heur.exe
- Size 364KB
- Sample261014-em2brafz2p
- SHA256 1cc1f3ade31c52de51a3b953170e7b6a2c7880afee33b7e4442d773e8333b652
Malware Config
Signatures
- Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- UPX packed file 4 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Executes a command shell one-liner 1 TTPs 1 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
- Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious use of WriteProcessMemory 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\jaffacakes118_not-a-virus.HEUR.AdWare.Win32.BrainInst.heur.exe"C:\Users\Admin\AppData\Local\Temp\jaffacakes118_not-a-virus.HEUR.AdWare.Win32.BrainInst.heur.exe"1⤵
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\656.bat2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
656.bat
memory/5048-0-0x00000000001B0000-0x00000000002E3000-memory.dmp
memory/5048-1-0x00000000002E2000-0x00000000002E3000-memory.dmp
memory/5048-2-0x00000000001B0000-0x00000000002E3000-memory.dmp
memory/5048-3-0x00000000001B0000-0x00000000002E3000-memory.dmp
memory/5048-8-0x00000000001B0000-0x00000000002E3000-memory.dmp