Analysis
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max time kernel
142s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20240611-en -
resource tags
arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system -
submitted
21-06-2024 23:05
Behavioral task
behavioral1
Sample
XClient.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
XClient.exe
Resource
win10v2004-20240611-en
General
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Target
XClient.exe
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Size
71KB
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MD5
b82626cc0347f048f8da43fb67033b74
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SHA1
2a5ea2cc17682a0750b4d9f9ab84c53e20ab49c9
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SHA256
da823b302bfe968cb38012247306efe78d3de49dfd2e46988222edd92bae4599
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SHA512
434d1d159ef525ca5fce31d88499cce87e1d9620c906f465e245a711a6f44b6c85838d87d4c76f4efd2ae4364be3fdbb51e4e262dd3eab12b7ac0c528b8d123a
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SSDEEP
1536:YSZYQ7TuBPAcJzvtC5mQWtKSEzhdAb0Yd/JFwNNm+2WOEjPQ59GRV:YSr8lEWtysb0YLFwNNm+ZOEjP3V
Malware Config
Extracted
xworm
runderscore00-25851.portmap.host:25851
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Install_directory
%ProgramData%
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install_file
USB.exe
Signatures
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Detect Xworm Payload 2 IoCs
Processes:
resource yara_rule behavioral2/memory/1628-1-0x0000000000CB0000-0x0000000000CC8000-memory.dmp family_xworm C:\ProgramData\svchost family_xworm -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
XClient.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2447855248-390457009-3660902674-1000\Control Panel\International\Geo\Nation XClient.exe -
Drops startup file 2 IoCs
Processes:
XClient.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk XClient.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk XClient.exe -
Executes dropped EXE 3 IoCs
Processes:
svchostsvchostsvchostpid process 4260 svchost 2472 svchost 4600 svchost -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
XClient.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2447855248-390457009-3660902674-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost" XClient.exe -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 18 ip-api.com -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 1 IoCs
Processes:
XClient.exepid process 1628 XClient.exe -
Suspicious use of AdjustPrivilegeToken 5 IoCs
Processes:
XClient.exesvchostsvchostsvchostdescription pid process Token: SeDebugPrivilege 1628 XClient.exe Token: SeDebugPrivilege 1628 XClient.exe Token: SeDebugPrivilege 4260 svchost Token: SeDebugPrivilege 2472 svchost Token: SeDebugPrivilege 4600 svchost -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
XClient.exepid process 1628 XClient.exe -
Suspicious use of WriteProcessMemory 2 IoCs
Processes:
XClient.exedescription pid process target process PID 1628 wrote to memory of 1924 1628 XClient.exe schtasks.exe PID 1628 wrote to memory of 1924 1628 XClient.exe schtasks.exe -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\XClient.exe"C:\Users\Admin\AppData\Local\Temp\XClient.exe"1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1628 -
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost"2⤵
- Scheduled Task/Job: Scheduled Task
PID:1924
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C:\ProgramData\svchostC:\ProgramData\svchost1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4260
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C:\ProgramData\svchostC:\ProgramData\svchost1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2472
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C:\ProgramData\svchostC:\ProgramData\svchost1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4600
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
71KB
MD5b82626cc0347f048f8da43fb67033b74
SHA12a5ea2cc17682a0750b4d9f9ab84c53e20ab49c9
SHA256da823b302bfe968cb38012247306efe78d3de49dfd2e46988222edd92bae4599
SHA512434d1d159ef525ca5fce31d88499cce87e1d9620c906f465e245a711a6f44b6c85838d87d4c76f4efd2ae4364be3fdbb51e4e262dd3eab12b7ac0c528b8d123a
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Filesize
654B
MD52ff39f6c7249774be85fd60a8f9a245e
SHA1684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA256e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
SHA5121d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1