Analysis
- max time kernel
149s - max time network
153s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260710-en - resource tags
- submitted
09/08/2026, 18:37
General
- Target ae3811913d691d0327fb5a3dd0ee0c7918bc163fcc7aeda31da319fa7978ec14.exe
- Size 276KB
- Sample260809-w9ymtatejb
- SHA256 ae3811913d691d0327fb5a3dd0ee0c7918bc163fcc7aeda31da319fa7978ec14
Malware Config
Extracted
-
asyncrat
-
0.5.8
-
Default
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2.tcp.eu.ngrok.io:15186
-
M7YeGuHk5V4z
-
delay
3
-
install
true
-
install_file
Primer.exe
-
install_folder
%AppData%
Signatures
- Family: AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
- Async RAT payload 3 IoCs
- Executes dropped EXE 2 IoCs
- Contacts third-party web service commonly abused for C2 1 TTPs 1 IoCs
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Executes a command shell one-liner 1 TTPs 2 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
- System Location Discovery: System Language Discovery 1 TTPs 7 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 31 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\ae3811913d691d0327fb5a3dd0ee0c7918bc163fcc7aeda31da319fa7978ec14.exe"C:\Users\Admin\AppData\Local\Temp\ae3811913d691d0327fb5a3dd0ee0c7918bc163fcc7aeda31da319fa7978ec14.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Primer" /tr '"C:\Users\Admin\AppData\Roaming\Primer.exe"' & exit2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "Primer" /tr '"C:\Users\Admin\AppData\Roaming\Primer.exe"'3⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
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-
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpBD1C.tmp.bat""2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout 33⤵
- System Location Discovery: System Language Discovery
- Delays execution with timeout.exe
-
-
C:\Users\Admin\AppData\Roaming\Primer.exe"C:\Users\Admin\AppData\Roaming\Primer.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
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-
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C:\Users\Admin\AppData\Roaming\Primer.exe"C:\Users\Admin\AppData\Roaming\Primer.exe"1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
tmpBD1C.tmp.bat
Primer.exe
memory/2428-3-0x0000000075120000-0x00000000758DC000-memory.dmp
memory/2428-0-0x0000000075132000-0x0000000075133000-memory.dmp
memory/2428-4-0x0000000075120000-0x00000000758DC000-memory.dmp
memory/2428-5-0x0000000004BD0000-0x0000000004C6C000-memory.dmp
memory/2428-2-0x0000000075120000-0x00000000758DC000-memory.dmp
memory/2428-11-0x0000000075120000-0x00000000758DC000-memory.dmp
memory/2428-1-0x0000000002470000-0x0000000002482000-memory.dmp
memory/2720-14-0x0000000002700000-0x0000000002712000-memory.dmp
memory/2720-15-0x0000000075120000-0x00000000758DC000-memory.dmp
memory/2720-16-0x0000000075120000-0x00000000758DC000-memory.dmp
memory/2720-19-0x0000000075120000-0x00000000758DC000-memory.dmp
memory/2720-20-0x0000000075120000-0x00000000758DC000-memory.dmp
memory/5664-18-0x0000000002600000-0x0000000002612000-memory.dmp