Analysis
- max time kernel
92s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
23/01/2025, 17:36
General
- Target ZCYxSCA9cbn8voXjBSQrPnD8.exe
- Size 2.5MB
- Sample250123-v6kfcaxlbs
- SHA256 fb110b1db7c02725d6cb0953cf153a2b5e158d358db136aece90ac06d79cb07d
Malware Config
Extracted
-
stealc
-
http://stair585.com
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Stealc family
- 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.
- Themida packer 2 IoCs
Detects Themida, an advanced Windows software protection system.
- Checks whether UAC is enabled 1 TTPs 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\ZCYxSCA9cbn8voXjBSQrPnD8.exe"C:\Users\Admin\AppData\Local\Temp\ZCYxSCA9cbn8voXjBSQrPnD8.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
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"2⤵
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
memory/2144-21-0x0000000002F00000-0x0000000002F1C000-memory.dmp
memory/2144-22-0x0000000002F00000-0x0000000002F15000-memory.dmp
memory/2144-2-0x0000000074F20000-0x0000000075010000-memory.dmp
memory/2144-3-0x0000000074F20000-0x0000000075010000-memory.dmp
memory/2144-4-0x0000000074F20000-0x0000000075010000-memory.dmp
memory/2144-7-0x0000000074F20000-0x0000000075010000-memory.dmp
memory/2144-6-0x0000000074F20000-0x0000000075010000-memory.dmp
memory/2144-5-0x0000000074F20000-0x0000000075010000-memory.dmp
memory/2144-10-0x0000000000630000-0x0000000000C54000-memory.dmp
memory/2144-29-0x0000000002F00000-0x0000000002F15000-memory.dmp
memory/2144-12-0x0000000000630000-0x0000000000C54000-memory.dmp
memory/2144-13-0x0000000074F40000-0x0000000074F41000-memory.dmp
memory/2144-14-0x0000000074F20000-0x0000000075010000-memory.dmp
memory/2144-15-0x0000000074F20000-0x0000000075010000-memory.dmp
memory/2144-16-0x0000000074F20000-0x0000000075010000-memory.dmp
memory/2144-17-0x0000000074F20000-0x0000000075010000-memory.dmp
memory/2144-18-0x0000000074F20000-0x0000000075010000-memory.dmp
memory/2144-20-0x0000000074F20000-0x0000000075010000-memory.dmp
memory/2144-1-0x0000000074F40000-0x0000000074F41000-memory.dmp
memory/2144-0-0x0000000000630000-0x0000000000C54000-memory.dmp
memory/2144-11-0x0000000005620000-0x00000000056BC000-memory.dmp
memory/2144-43-0x0000000002F00000-0x0000000002F15000-memory.dmp
memory/2144-41-0x0000000002F00000-0x0000000002F15000-memory.dmp
memory/2144-55-0x0000000074F20000-0x0000000075010000-memory.dmp
memory/2144-39-0x0000000002F00000-0x0000000002F15000-memory.dmp
memory/2144-37-0x0000000002F00000-0x0000000002F15000-memory.dmp
memory/2144-35-0x0000000002F00000-0x0000000002F15000-memory.dmp
memory/2144-33-0x0000000002F00000-0x0000000002F15000-memory.dmp
memory/2144-31-0x0000000002F00000-0x0000000002F15000-memory.dmp
memory/2144-27-0x0000000002F00000-0x0000000002F15000-memory.dmp
memory/2144-25-0x0000000002F00000-0x0000000002F15000-memory.dmp
memory/2144-45-0x0000000002F00000-0x0000000002F15000-memory.dmp
memory/2144-23-0x0000000002F00000-0x0000000002F15000-memory.dmp
memory/2144-54-0x0000000000630000-0x0000000000C54000-memory.dmp
memory/4352-49-0x0000000074F20000-0x0000000075010000-memory.dmp
memory/4352-50-0x0000000074F20000-0x0000000075010000-memory.dmp
memory/4352-48-0x0000000000400000-0x000000000062D000-memory.dmp
memory/4352-46-0x0000000000400000-0x000000000062D000-memory.dmp