Analysis
- max time kernel
69s - max time network
73s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
08/07/2024, 14:21
General
- Target AIO checker 2023.exe
- Size 1.6MB
- Sample240708-rn38yswang
- SHA256 7132de359cbddd24073be632e3f1a6a8dd926d8e2bb9b4b4cb633143ceb0ee55
Malware Config
Signatures
- DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
- DCRat payload 4 IoCs
Detects payload of DCRat, commonly dropped by NSIS installers.
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Drops startup file 2 IoCs
- Executes dropped EXE 2 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
- Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 12 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\AIO checker 2023.exe"C:\Users\Admin\AppData\Local\Temp\AIO checker 2023.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\ms_update.exe"C:\Users\Admin\AppData\Roaming\ms_update.exe"2⤵
- Drops startup file
- Executes dropped EXE
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C:\Users\Admin\AppData\Roaming\ms_updater.exe"C:\Users\Admin\AppData\Roaming\ms_updater.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\uE1uhqNQVG.bat" "3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\w32tm.exew32tm /stripchart /computer:localhost /period:5 /dataonly /samples:24⤵
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
uE1uhqNQVG.bat
ms_update.exe
ms_updater.exe
memory/1036-27-0x00007FFC401D3000-0x00007FFC401D5000-memory.dmp
memory/1036-33-0x000001427EC60000-0x000001427EC68000-memory.dmp
memory/2520-7-0x0000000002D50000-0x0000000002EC7000-memory.dmp
memory/2520-31-0x0000000002D50000-0x0000000002EC7000-memory.dmp
memory/2520-29-0x0000000002D50000-0x0000000002EC7000-memory.dmp
memory/2520-0-0x0000000002D50000-0x0000000002EC7000-memory.dmp
memory/3108-35-0x0000000000530000-0x000000000066C000-memory.dmp
memory/3108-39-0x000000001B940000-0x000000001B990000-memory.dmp
memory/3108-40-0x000000001B2B0000-0x000000001B2C6000-memory.dmp
memory/3108-38-0x00007FFC401D0000-0x00007FFC40C91000-memory.dmp
memory/3108-37-0x000000001B290000-0x000000001B2AC000-memory.dmp
memory/3108-41-0x0000000002680000-0x0000000002690000-memory.dmp
memory/3108-36-0x00007FFC401D0000-0x00007FFC40C91000-memory.dmp
memory/3108-81-0x00007FFC401D0000-0x00007FFC40C91000-memory.dmp