Analysis
- max time kernel
149s - max time network
151s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
04/05/2026, 03:39
General
- Target kop.exe
- Size 157KB
- Sample260504-d73vmsfv8k
- SHA256 20da7c750b4c1162896320d3381121eb4bf71a19eee85234e9425d78c92c865c
Malware Config
Extracted
-
xworm
-
5.0
-
admingdtg.vn:6000
-
aliexpress.us.com:6000
-
y5IogJoUK72chel2
-
Install_directory
%AppData%
-
install_file
XClient.exe
Extracted
-
asyncrat
-
0.5.7B
-
C2
-
admingdtg.vn:6606
-
admingdtg.vn:7707
-
admingdtg.vn:8808
-
admingdtg.vn:443
-
admingdtg.vn:80
-
admingdtg.vn:22
-
handyrenuopen.in.net:6606
-
handyrenuopen.in.net:7707
-
handyrenuopen.in.net:8808
-
handyrenuopen.in.net:443
-
handyrenuopen.in.net:80
-
handyrenuopen.in.net:22
-
roofing.gb.net:6606
-
roofing.gb.net:7707
-
roofing.gb.net:8808
-
roofing.gb.net:443
-
roofing.gb.net:80
-
roofing.gb.net:22
-
wplog.jp.net:6606
-
wplog.jp.net:7707
-
AsyncMutex_6SI8OkPnk
-
delay
3
-
install
false
-
install_file
venom.exe
-
install_folder
%AppData%
Signatures
- Family: AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
- Family: Xworm
Xworm is a remote access trojan written in C#.
- Async RAT payload 1 IoCs
- Detect Xworm Payload 3 IoCs
- Executes dropped EXE 2 IoCs
- Contacts third-party web service commonly abused for C2 1 TTPs 2 IoCs
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
- Looks up external IP address via web service 1 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).
- System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\kop.exe"C:\Users\Admin\AppData\Local\Temp\kop.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\XClient.exe"C:\Users\Admin\AppData\Roaming\XClient.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Users\Admin\AppData\Roaming\AsyncClient.exe"C:\Users\Admin\AppData\Roaming\AsyncClient.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
AsyncClient.exe
XClient.exe
memory/1304-0-0x0000000000DE0000-0x0000000000E0E000-memory.dmp
memory/1304-23-0x0000000002F40000-0x0000000002F4C000-memory.dmp
memory/1316-24-0x0000000000450000-0x0000000000460000-memory.dmp
memory/1316-26-0x000000001AED0000-0x000000001AEE0000-memory.dmp
memory/1316-30-0x000000001AE90000-0x000000001AEA0000-memory.dmp
memory/1316-29-0x000000001AF30000-0x000000001AF42000-memory.dmp
memory/1316-28-0x0000000000C60000-0x0000000000C6C000-memory.dmp
memory/3912-27-0x0000000000070000-0x0000000000090000-memory.dmp
memory/3912-31-0x0000000000AA0000-0x0000000000B1B000-memory.dmp
memory/3912-32-0x0000000004950000-0x0000000004A9D000-memory.dmp