Analysis
- max time kernel
118s - max time network
124s - platform
windows10_x64 - resource
win10-en-20211208 - submitted
10/01/2022, 04:27
General
- Target 2d6eca88082c6abce764f8a54b9b9917.exe
- Size 1.6MB
- Sample220110-e24enadha6
- SHA256 f960b96c81f71d848a119d18aa4074ecaa71e39086a611f2dc637d579b9f6afa
Malware Config
Signatures
- Arkei
Arkei is an infostealer written in C++.
- Arkei Stealer Payload 4 IoCs
- Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
- Downloads MZ/PE file
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Loads dropped DLL 3 IoCs
- 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 installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Checks whether UAC is enabled 1 TTPs 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\2d6eca88082c6abce764f8a54b9b9917.exe"C:\Users\Admin\AppData\Local\Temp\2d6eca88082c6abce764f8a54b9b9917.exe"1⤵
- Checks BIOS information in registry
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\2d6eca88082c6abce764f8a54b9b9917.exe" & exit2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exetimeout /t 53⤵
- Delays execution with timeout.exe
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/948-125-0x0000000001070000-0x000000000142F000-memory.dmp
memory/948-128-0x0000000001070000-0x000000000142F000-memory.dmp
memory/948-122-0x0000000001070000-0x000000000142F000-memory.dmp
memory/948-123-0x0000000002F50000-0x0000000002F51000-memory.dmp
memory/948-121-0x0000000001070000-0x000000000142F000-memory.dmp
memory/948-124-0x00000000746A0000-0x0000000074862000-memory.dmp
memory/948-115-0x0000000001070000-0x000000000142F000-memory.dmp
memory/948-126-0x0000000001070000-0x000000000142F000-memory.dmp
memory/948-127-0x0000000001070000-0x000000000142F000-memory.dmp
memory/948-120-0x0000000001070000-0x000000000142F000-memory.dmp
memory/948-130-0x0000000001070000-0x000000000142F000-memory.dmp
memory/948-129-0x0000000001070000-0x000000000142F000-memory.dmp
memory/948-131-0x0000000077BB0000-0x0000000077D3E000-memory.dmp
memory/948-118-0x0000000002F00000-0x0000000002F44000-memory.dmp
memory/948-119-0x0000000001070000-0x000000000142F000-memory.dmp
memory/948-117-0x0000000001070000-0x000000000142F000-memory.dmp
memory/948-116-0x0000000001070000-0x000000000142F000-memory.dmp