Analysis
- max time kernel
142s - max time network
172s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
25/12/2023, 10:03
General
- Target 15dbc954cd4f54abc55486ef11375fa6.exe
- Size 25.5MB
- Sample231225-l3mxmacha4
- SHA256 1e71f322863511ac34ab0013f3740b1921a9756f4b326d2184a8f6159e61ccff
Malware Config
Extracted
-
44caliber
-
https://discord.com/api/webhooks/870377028749242408/bsw2VmRGeiAIilnd9vwqpCOLMZO_5v4RLwcEnrTBTCpbNpQmrUG6iRNERPAwaRZbpXqc
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.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Themida packer 2 IoCs
Detects Themida, an advanced Windows software protection system.
- 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
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 5 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\15dbc954cd4f54abc55486ef11375fa6.exe"C:\Users\Admin\AppData\Local\Temp\15dbc954cd4f54abc55486ef11375fa6.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Process.txt
Process.txt
Process.txt
memory/1980-3-0x00007FF900030000-0x00007FF900031000-memory.dmp
memory/1980-4-0x00007FF928BB0000-0x00007FF928DA5000-memory.dmp
memory/1980-7-0x00007FF909710000-0x00007FF90A1D1000-memory.dmp
memory/1980-8-0x00007FF755CE0000-0x00007FF759FE0000-memory.dmp
memory/1980-9-0x00007FF755CE0000-0x00007FF759FE0000-memory.dmp
memory/1980-10-0x0000000003730000-0x0000000003740000-memory.dmp
memory/1980-0-0x00007FF926830000-0x00007FF926AF9000-memory.dmp
memory/1980-2-0x00007FF900000000-0x00007FF900002000-memory.dmp
memory/1980-1-0x00007FF926830000-0x00007FF926AF9000-memory.dmp
memory/1980-138-0x00007FF928BB0000-0x00007FF928DA5000-memory.dmp
memory/1980-137-0x00007FF926830000-0x00007FF926AF9000-memory.dmp
memory/1980-139-0x00007FF909710000-0x00007FF90A1D1000-memory.dmp