Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
11/01/2025, 09:07
General
- Target JaffaCakes118_fcf393b445d4f0b001d53e097db8e5fe.exe
- Size 71KB
- Sample250111-k3j1astpft
- SHA256 6d42ab03dc8bf128ef84fd8c6a33b113ac9961077f72ab94a353a5e4f05aac61
Malware Config
Extracted
-
asyncrat
-
0.5.7B
-
Default
-
remalarm.ddns.net:6606
-
remalarm.ddns.net:8808
-
AsyncMutex_6SI8OkPnk
-
delay
10
-
install
true
-
install_file
Test.exe
-
install_folder
%AppData%
Signatures
- AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
- Asyncrat family
- Async RAT payload 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 6 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Delays execution with timeout.exe 1 IoCs
- Scheduled Task/Job: Scheduled Task 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 2 IoCs
- Suspicious use of WriteProcessMemory 15 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_fcf393b445d4f0b001d53e097db8e5fe.exe"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_fcf393b445d4f0b001d53e097db8e5fe.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- 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 "Test" /tr '"C:\Users\Admin\AppData\Roaming\Test.exe"' & exit2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "Test" /tr '"C:\Users\Admin\AppData\Roaming\Test.exe"'3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
-
-
-
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpD2D1.tmp.bat""2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exetimeout 33⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
-
-
C:\Users\Admin\AppData\Roaming\Test.exe"C:\Users\Admin\AppData\Roaming\Test.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
tmpD2D1.tmp.bat
Test.exe
memory/1368-4-0x0000000007950000-0x00000000079E2000-memory.dmp
memory/1368-9-0x0000000074AD0000-0x0000000075280000-memory.dmp
memory/1368-0-0x0000000074ADE000-0x0000000074ADF000-memory.dmp
memory/1368-5-0x0000000004E40000-0x0000000004E46000-memory.dmp
memory/1368-6-0x0000000004ED0000-0x0000000004EE2000-memory.dmp
memory/1368-7-0x0000000074AD0000-0x0000000075280000-memory.dmp
memory/1368-8-0x0000000074ADE000-0x0000000074ADF000-memory.dmp
memory/1368-3-0x0000000007F00000-0x00000000084A4000-memory.dmp
memory/1368-10-0x0000000007BF0000-0x0000000007C8C000-memory.dmp
memory/1368-15-0x0000000074AD0000-0x0000000075280000-memory.dmp
memory/1368-2-0x0000000002D00000-0x0000000002D2C000-memory.dmp
memory/1368-1-0x0000000000A30000-0x0000000000A48000-memory.dmp
memory/3000-20-0x0000000074AD0000-0x0000000075280000-memory.dmp
memory/3000-21-0x0000000074AD0000-0x0000000075280000-memory.dmp
memory/3000-22-0x0000000074AD0000-0x0000000075280000-memory.dmp