Analysis
- max time kernel
45s - max time network
40s - platform
windows10-2004_x64 - resource
win10v2004-20240221-en - resource tags
- submitted
24/02/2024, 22:31
General
- Target aimstar.exe
- Size 7.7MB
- Sample240224-2fm7wagg4y
- SHA256 636e70909dfc21703747ce167243327f31be31210107bfd865ad37a7b90e4720
Malware Config
Extracted
-
blackguard
-
https://api.telegram.org/bot6983151793:AAHNg6Weep9RXr0xtID5GbMp4oUCYfsclrY/sendMessage?chat_id=6591851501
Signatures
- BlackGuard
Infostealer first seen in Late 2021.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 5 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
- Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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.
- Suspicious behavior: EnumeratesProcesses 41 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of FindShellTrayWindow 47 IoCs
- Suspicious use of SendNotifyMessage 47 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\aimstar.exe"C:\Users\Admin\AppData\Local\Temp\aimstar.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\v2.exe"C:\Users\Admin\AppData\Local\Temp\v2.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\system32\taskmgr.exe"C:\Windows\system32\taskmgr.exe" /41⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Newtonsoft.Json.dll
SQLite.Interop.dll
System.Data.SQLite.dll
v2.exe
Bookmarks.txt
Process.txt
memory/1520-84-0x0000017932290000-0x0000017932291000-memory.dmp
memory/1520-93-0x0000017932290000-0x0000017932291000-memory.dmp
memory/1520-99-0x0000017932290000-0x0000017932291000-memory.dmp
memory/1520-98-0x0000017932290000-0x0000017932291000-memory.dmp
memory/1520-87-0x0000017932290000-0x0000017932291000-memory.dmp
memory/1520-97-0x0000017932290000-0x0000017932291000-memory.dmp
memory/1520-85-0x0000017932290000-0x0000017932291000-memory.dmp
memory/1520-92-0x0000017932290000-0x0000017932291000-memory.dmp
memory/1520-96-0x0000017932290000-0x0000017932291000-memory.dmp
memory/1520-94-0x0000017932290000-0x0000017932291000-memory.dmp
memory/2092-31-0x00000000741C0000-0x0000000074970000-memory.dmp
memory/2092-109-0x0000000008150000-0x00000000086F4000-memory.dmp
memory/2092-74-0x0000000006450000-0x00000000064E2000-memory.dmp
memory/2092-83-0x00000000057B0000-0x0000000005842000-memory.dmp
memory/2092-32-0x00000000054C0000-0x00000000054D0000-memory.dmp
memory/2092-102-0x0000000006960000-0x00000000069C8000-memory.dmp
memory/2092-103-0x00000000069D0000-0x0000000006D24000-memory.dmp
memory/2092-104-0x00000000068F0000-0x000000000693C000-memory.dmp
memory/2092-86-0x0000000005760000-0x00000000057B0000-memory.dmp
memory/2092-88-0x0000000005980000-0x00000000059A2000-memory.dmp
memory/2092-110-0x0000000007BA0000-0x0000000007BDC000-memory.dmp
memory/2092-111-0x0000000007CE0000-0x0000000007D01000-memory.dmp
memory/2092-116-0x0000000008A90000-0x0000000008C52000-memory.dmp
memory/2092-30-0x0000000000A20000-0x0000000000A6A000-memory.dmp
memory/2092-212-0x00000000062D0000-0x0000000006336000-memory.dmp
memory/2092-213-0x0000000007F70000-0x0000000007FE6000-memory.dmp
memory/2092-214-0x0000000006360000-0x000000000637E000-memory.dmp
memory/2092-217-0x00000000741C0000-0x0000000074970000-memory.dmp