Analysis
- max time kernel
237s - max time network
346s - platform
windows7_x64 - resource
win7-20221111-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.
- Deletes itself 1 IoCs
- 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 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 7 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 8 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
- Loads dropped DLL
- Checks whether UAC is enabled
- Writes to the Master Boot Record (MBR)
- Suspicious use of NtSetInformationThreadHideFromDebugger
- 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⤵
- Deletes itself
- 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/652-60-0x0000000002A10000-0x000000000302E000-memory.dmp
memory/652-64-0x0000000003030000-0x0000000003166000-memory.dmp
memory/652-58-0x0000000000360000-0x0000000000B33000-memory.dmp
memory/652-59-0x0000000000360000-0x0000000000B33000-memory.dmp
memory/652-54-0x0000000076391000-0x0000000076393000-memory.dmp
memory/652-63-0x00000000773E0000-0x0000000077560000-memory.dmp
memory/652-69-0x000000000C390000-0x000000000C6AF000-memory.dmp
memory/652-65-0x00000000773E0000-0x0000000077560000-memory.dmp
memory/652-66-0x0000000000360000-0x0000000000B33000-memory.dmp
memory/652-67-0x0000000002A10000-0x000000000302E000-memory.dmp
memory/652-57-0x0000000000360000-0x0000000000B33000-memory.dmp
memory/652-68-0x0000000003030000-0x0000000003166000-memory.dmp
memory/652-56-0x00000000773E0000-0x0000000077560000-memory.dmp
memory/652-73-0x0000000002C10000-0x0000000002C6F000-memory.dmp
memory/652-74-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/652-92-0x000000000C390000-0x000000000C6AF000-memory.dmp
memory/652-70-0x000000000C390000-0x000000000C6AF000-memory.dmp
memory/652-55-0x0000000000360000-0x0000000000B33000-memory.dmp
memory/652-100-0x0000000003030000-0x0000000003166000-memory.dmp
memory/652-97-0x0000000000360000-0x0000000000B33000-memory.dmp
memory/652-99-0x0000000002A10000-0x0000000002B90000-memory.dmp
memory/652-98-0x00000000773E0000-0x0000000077560000-memory.dmp