Analysis
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max time kernel
148s -
max time network
132s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
26-05-2024 12:21
Behavioral task
behavioral1
Sample
XClient.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
XClient.exe
Resource
win10v2004-20240508-en
General
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Target
XClient.exe
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Size
39KB
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MD5
66f5cca568b2b83c23a69295ad2c643b
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SHA1
b822f0bcded0f587413d84f27eb2f5fdcdb48304
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SHA256
971294811a8fd3c967958db073238a75573ea1db5749b8153e5f684b27f99da6
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SHA512
c8bf4acc4644b614715eeaf4cda10ba100afeceaab0f7b7cb627f1c6f7676308c0c73e7dbbe6833ec3da1f9c10616e2c28a9ba4fc88e180ff3e0123071c50469
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SSDEEP
768:VG7+qmT8ztyh6pwDYvCL2v6hCuuJf27iJ1fFWPG9/hL6OOwhnjibH:4fmT8ztyh6pwDnKwCuuJfBFv9/hL6OO3
Malware Config
Extracted
xworm
5.0
127.0.0.1:54921
Zv7fhTadtKHCA29x
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Install_directory
%AppData%
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install_file
XClient.exe
Signatures
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Detect Xworm Payload 5 IoCs
Processes:
resource yara_rule behavioral1/memory/2852-1-0x0000000001300000-0x0000000001310000-memory.dmp family_xworm C:\Users\Admin\AppData\Roaming\XClient.exe family_xworm behavioral1/memory/1488-37-0x0000000000120000-0x0000000000130000-memory.dmp family_xworm behavioral1/memory/668-42-0x00000000009F0000-0x0000000000A00000-memory.dmp family_xworm behavioral1/memory/2892-44-0x00000000001A0000-0x00000000001B0000-memory.dmp family_xworm -
Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
Processes:
powershell.exepowershell.exepowershell.exepowershell.exepid process 2820 powershell.exe 2400 powershell.exe 2388 powershell.exe 2284 powershell.exe -
Drops startup file 2 IoCs
Processes:
XClient.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk XClient.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk XClient.exe -
Executes dropped EXE 3 IoCs
Processes:
XClient.exeXClient.exeXClient.exepid process 1488 XClient.exe 668 XClient.exe 2892 XClient.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
XClient.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe" XClient.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 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 5 IoCs
Processes:
powershell.exepowershell.exepowershell.exepowershell.exeXClient.exepid process 2284 powershell.exe 2820 powershell.exe 2400 powershell.exe 2388 powershell.exe 2852 XClient.exe -
Suspicious use of AdjustPrivilegeToken 9 IoCs
Processes:
XClient.exepowershell.exepowershell.exepowershell.exepowershell.exeXClient.exeXClient.exeXClient.exedescription pid process Token: SeDebugPrivilege 2852 XClient.exe Token: SeDebugPrivilege 2284 powershell.exe Token: SeDebugPrivilege 2820 powershell.exe Token: SeDebugPrivilege 2400 powershell.exe Token: SeDebugPrivilege 2388 powershell.exe Token: SeDebugPrivilege 2852 XClient.exe Token: SeDebugPrivilege 1488 XClient.exe Token: SeDebugPrivilege 668 XClient.exe Token: SeDebugPrivilege 2892 XClient.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
XClient.exepid process 2852 XClient.exe -
Suspicious use of WriteProcessMemory 24 IoCs
Processes:
XClient.exetaskeng.exedescription pid process target process PID 2852 wrote to memory of 2284 2852 XClient.exe powershell.exe PID 2852 wrote to memory of 2284 2852 XClient.exe powershell.exe PID 2852 wrote to memory of 2284 2852 XClient.exe powershell.exe PID 2852 wrote to memory of 2820 2852 XClient.exe powershell.exe PID 2852 wrote to memory of 2820 2852 XClient.exe powershell.exe PID 2852 wrote to memory of 2820 2852 XClient.exe powershell.exe PID 2852 wrote to memory of 2400 2852 XClient.exe powershell.exe PID 2852 wrote to memory of 2400 2852 XClient.exe powershell.exe PID 2852 wrote to memory of 2400 2852 XClient.exe powershell.exe PID 2852 wrote to memory of 2388 2852 XClient.exe powershell.exe PID 2852 wrote to memory of 2388 2852 XClient.exe powershell.exe PID 2852 wrote to memory of 2388 2852 XClient.exe powershell.exe PID 2852 wrote to memory of 2268 2852 XClient.exe schtasks.exe PID 2852 wrote to memory of 2268 2852 XClient.exe schtasks.exe PID 2852 wrote to memory of 2268 2852 XClient.exe schtasks.exe PID 1456 wrote to memory of 1488 1456 taskeng.exe XClient.exe PID 1456 wrote to memory of 1488 1456 taskeng.exe XClient.exe PID 1456 wrote to memory of 1488 1456 taskeng.exe XClient.exe PID 1456 wrote to memory of 668 1456 taskeng.exe XClient.exe PID 1456 wrote to memory of 668 1456 taskeng.exe XClient.exe PID 1456 wrote to memory of 668 1456 taskeng.exe XClient.exe PID 1456 wrote to memory of 2892 1456 taskeng.exe XClient.exe PID 1456 wrote to memory of 2892 1456 taskeng.exe XClient.exe PID 1456 wrote to memory of 2892 1456 taskeng.exe XClient.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⤵
- 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:2852 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\XClient.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2284
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2820
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\XClient.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2400
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2388
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"2⤵
- Creates scheduled task(s)
PID:2268
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C:\Windows\system32\taskeng.exetaskeng.exe {D122CE25-E8EE-4924-B75E-E5B3667417C0} S-1-5-21-1298544033-3225604241-2703760938-1000:IZKCKOTP\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
PID:1456 -
C:\Users\Admin\AppData\Roaming\XClient.exeC:\Users\Admin\AppData\Roaming\XClient.exe2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1488
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C:\Users\Admin\AppData\Roaming\XClient.exeC:\Users\Admin\AppData\Roaming\XClient.exe2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:668
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C:\Users\Admin\AppData\Roaming\XClient.exeC:\Users\Admin\AppData\Roaming\XClient.exe2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2892
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
Filesize7KB
MD5b01181a1c8559c8c865751e6001c2a5e
SHA1fbb6cc2b672982f4dfb4878e69c481807975cc28
SHA2564d6983e3cadadd40e0a6b8c5bb812c574b560c8418107f14acf36ecb9df95c85
SHA5121d2c230fc53464f00c5e0dff16e7ae651bbccf04092bfd03018bad803a651b69590b59fe38d1fd047ce665797fce5b01ff53d0aec404994e8238a1ee7149df77
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Filesize
39KB
MD566f5cca568b2b83c23a69295ad2c643b
SHA1b822f0bcded0f587413d84f27eb2f5fdcdb48304
SHA256971294811a8fd3c967958db073238a75573ea1db5749b8153e5f684b27f99da6
SHA512c8bf4acc4644b614715eeaf4cda10ba100afeceaab0f7b7cb627f1c6f7676308c0c73e7dbbe6833ec3da1f9c10616e2c28a9ba4fc88e180ff3e0123071c50469
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MD5
d41d8cd98f00b204e9800998ecf8427e
SHA1da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e