Analysis
- max time kernel
90s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
02/12/2022, 00:12
General
- Target 1d526d81d29d6ade00489f6a2d6b79b0.exe
- Size 7.8MB
- Sample221202-ag8reshf8x
- SHA256 5e609fdb0a898c8fc4510e8f4508618fafb345d71528586b5c0f8eb6df547abe
Malware Config
Extracted
-
vidar
-
56
-
1760
-
https://t.me/vmt001
-
profile_id
1760
Signatures
- Vidar
Vidar is an infostealer based on Arkei stealer.
- 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.
- Loads dropped DLL 2 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses 2FA software files, possible credential harvesting 2 TTPs
- 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
- Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks SCSI registry key(s) 3 TTPs 20 IoCs
SCSI information is often read in order to detect sandboxing environments.
- 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 14 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\1d526d81d29d6ade00489f6a2d6b79b0.exe"C:\Users\Admin\AppData\Local\Temp\1d526d81d29d6ade00489f6a2d6b79b0.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Loads dropped DLL
- Checks whether UAC is enabled
- Writes to the Master Boot Record (MBR)
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks SCSI registry key(s)
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\1d526d81d29d6ade00489f6a2d6b79b0.exe" & exit2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exetimeout /t 63⤵
- Delays execution with timeout.exe
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
mozglue.dll
nss3.dll
memory/3312-137-0x0000000077550000-0x00000000776F3000-memory.dmp
memory/3312-144-0x00000000103E0000-0x000000001043F000-memory.dmp
memory/3312-132-0x0000000000E90000-0x0000000001663000-memory.dmp
memory/3312-138-0x0000000077550000-0x00000000776F3000-memory.dmp
memory/3312-139-0x0000000077550000-0x00000000776F3000-memory.dmp
memory/3312-140-0x0000000000E90000-0x0000000001663000-memory.dmp
memory/3312-141-0x0000000077550000-0x00000000776F3000-memory.dmp
memory/3312-142-0x0000000010430000-0x000000001074F000-memory.dmp
memory/3312-143-0x0000000010430000-0x000000001074F000-memory.dmp
memory/3312-136-0x0000000000E90000-0x0000000001663000-memory.dmp
memory/3312-147-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/3312-135-0x0000000000E90000-0x0000000001663000-memory.dmp
memory/3312-134-0x0000000077550000-0x00000000776F3000-memory.dmp
memory/3312-167-0x0000000010430000-0x000000001074F000-memory.dmp
memory/3312-133-0x0000000000E90000-0x0000000001663000-memory.dmp
memory/3312-171-0x0000000077550000-0x00000000776F3000-memory.dmp
memory/3312-170-0x0000000000E90000-0x0000000001663000-memory.dmp