Analysis
- max time kernel
150s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20230220-en - resource tags
- submitted
11/03/2023, 19:54
General
- Target test.exe
- Size 2.9MB
- Sample230311-yml2lsbb27
- SHA256 01035e3da31903105da034556332fdb5e12b1b73d3bdd743c53dda86b1a02f2f
Malware Config
Extracted
-
asyncrat
-
1.0.7
-
Default
-
coolmaneurokoolcom-26401.portmap.host:26401
-
DcRatMutex_qwqdanchun
-
delay
1
-
install
true
-
install_file
ABDJCM.exe
-
install_folder
%AppData%
Signatures
- AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
- Async RAT payload 2 IoCs
- 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.
- Themida packer 2 IoCs
Detects Themida, an advanced Windows software protection system.
- Checks whether UAC is enabled 1 TTPs 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 23 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\test.exe"C:\Users\Admin\AppData\Local\Temp\test.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ABDJCM" /tr '"C:\Users\Admin\AppData\Roaming\ABDJCM.exe"' & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "ABDJCM" /tr '"C:\Users\Admin\AppData\Roaming\ABDJCM.exe"'3⤵
- Creates scheduled task(s)
-
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/620-133-0x0000000000EC0000-0x00000000016D6000-memory.dmp
memory/620-136-0x0000000000EC0000-0x00000000016D6000-memory.dmp
memory/620-137-0x0000000000EC0000-0x00000000016D6000-memory.dmp
memory/620-138-0x00000000057E0000-0x00000000057F0000-memory.dmp
memory/620-140-0x0000000000EC0000-0x00000000016D6000-memory.dmp
memory/620-141-0x00000000057E0000-0x00000000057F0000-memory.dmp