Analysis
- max time kernel
150s - max time network
127s - platform
windows10-2004_x64 - resource
win10v2004-20220901-en - resource tags
- submitted
09/11/2022, 22:42
General
- Target file.exe
- Size 189KB
- Sample221109-2mnf8acgd2
- SHA256 28bbd3dae95a79a6bb45f40d0585c1f3a776fcc991bd6fb8f20e3da5b9646801
Malware Config
Extracted
-
vidar
-
55.6
-
1515
-
https://t.me/seclab_new
-
https://mas.to/@ofadex
-
profile_id
1515
Signatures
- Detects Smokeloader packer 1 IoCs
- SmokeLoader
Modular backdoor trojan in use since 2014.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Downloads MZ/PE file
- Executes dropped EXE 1 IoCs
- 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.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Program crash 2 IoCs
- Checks SCSI registry key(s) 3 TTPs 3 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 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 6 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
-
C:\Users\Admin\AppData\Local\Temp\4834.exeC:\Users\Admin\AppData\Local\Temp\4834.exe1⤵
- Executes dropped EXE
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\4834.exe" & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout /t 63⤵
- Delays execution with timeout.exe
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-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2000 -s 18362⤵
- Program crash
-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2000 -s 19642⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 2000 -ip 20001⤵
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 2000 -ip 20001⤵
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
mozglue.dll
nss3.dll
4834.exe
4834.exe
memory/2000-139-0x00000000006FD000-0x0000000000729000-memory.dmp
memory/2000-140-0x0000000000630000-0x000000000067B000-memory.dmp
memory/2000-141-0x0000000000400000-0x00000000005A6000-memory.dmp
memory/2000-142-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/2000-164-0x00000000006FD000-0x0000000000729000-memory.dmp
memory/2000-165-0x0000000000400000-0x00000000005A6000-memory.dmp
memory/4876-132-0x00000000007DD000-0x00000000007EE000-memory.dmp
memory/4876-135-0x0000000000400000-0x000000000058B000-memory.dmp
memory/4876-134-0x0000000000400000-0x000000000058B000-memory.dmp
memory/4876-133-0x0000000000600000-0x0000000000609000-memory.dmp