Analysis
- max time kernel
179s - max time network
196s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
26/12/2023, 01:18
General
- Target 48ad7db5fb10dd9b1c6817d5a9c34865.exe
- Size 2.2MB
- Sample231226-bn2r5abdb2
- SHA256 44cf30bb3e4623c4374ab4132bd419d3a63f119b36eaf66f1a5258e36df3b60a
Malware Config
Extracted
-
44caliber
-
https://discord.com/api/webhooks/850985103400108043/qMVlcxRCEtOy4d0lLo-ckGGqIgWka8O5mwrGC7NwW7qRJs5beglorhRUk-uRy4jQ1Cbz
Signatures
- 44Caliber
An open source infostealer written in C#.
- Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 2 IoCs
- Identifies Wine through registry keys 2 TTPs 1 IoCs
Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Checks whether UAC is enabled 1 TTPs 1 IoCs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 8 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\48ad7db5fb10dd9b1c6817d5a9c34865.exe"C:\Users\Admin\AppData\Local\Temp\48ad7db5fb10dd9b1c6817d5a9c34865.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Identifies Wine through registry keys
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\Insidious — êîïèÿ.exe"C:\Users\Admin\AppData\Local\Temp\Insidious — êîïèÿ.exe"2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Users\Admin\AppData\Local\Temp\12312.exe"C:\Users\Admin\AppData\Local\Temp\12312.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
12312.exe
Insidious — êîïèÿ.exe
Process.txt
Process.txt
Process.txt
memory/2996-21-0x0000000000670000-0x00000000006BA000-memory.dmp
memory/2996-153-0x00007FF8D0630000-0x00007FF8D10F1000-memory.dmp
memory/2996-58-0x000000001B3A0000-0x000000001B3B0000-memory.dmp
memory/2996-57-0x00007FF8D0630000-0x00007FF8D10F1000-memory.dmp
memory/4784-6-0x0000000002B10000-0x0000000002B11000-memory.dmp
memory/4784-20-0x0000000000400000-0x000000000092D000-memory.dmp
memory/4784-27-0x0000000000400000-0x000000000092D000-memory.dmp
memory/4784-5-0x0000000002B00000-0x0000000002B01000-memory.dmp
memory/4784-0-0x0000000000400000-0x000000000092D000-memory.dmp
memory/4784-4-0x0000000000400000-0x000000000092D000-memory.dmp
memory/4784-2-0x0000000000400000-0x000000000092D000-memory.dmp
memory/4784-1-0x0000000076F44000-0x0000000076F46000-memory.dmp