General
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Target
MasonClient.exe
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Size
48KB
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Sample
250302-zvmtjsvvex
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MD5
8f28ca9a926d19b481928e7943818c18
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SHA1
c39af1be425a90eb806d2874ad210266f55f297c
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SHA256
ea0cd48a7bbf5c3df7505631380715287c22db6cdb770dc36f211bba02bae59b
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SHA512
2acdbfe077ebc93a50836c7a719646445e48bfb893c05ccc06260bc815b91e28b0f5cd478131be2a71e330621f50d7712a3169c4234e68ebb6d7367aac9fc789
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SSDEEP
1536:Wt1VFdabn9SaSLxeQSoY7r8WnRzWnRYWnRVWnRyWnR899LSyYaW2ta46aXHWnRo5:m1DD3A5b3hbO1
Behavioral task
behavioral1
Sample
MasonClient.exe
Resource
win10v2004-20250217-en
Behavioral task
behavioral2
Sample
MasonClient.exe
Resource
win10ltsc2021-20250217-en
Behavioral task
behavioral3
Sample
MasonClient.exe
Resource
win11-20250217-en
Malware Config
Extracted
xworm
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Install_directory
%port%
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install_file
USB.exe
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pastebin_url
https://pastebin.com/raw/6EU9ps8S
Targets
-
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Target
MasonClient.exe
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Size
48KB
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MD5
8f28ca9a926d19b481928e7943818c18
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SHA1
c39af1be425a90eb806d2874ad210266f55f297c
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SHA256
ea0cd48a7bbf5c3df7505631380715287c22db6cdb770dc36f211bba02bae59b
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SHA512
2acdbfe077ebc93a50836c7a719646445e48bfb893c05ccc06260bc815b91e28b0f5cd478131be2a71e330621f50d7712a3169c4234e68ebb6d7367aac9fc789
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SSDEEP
1536:Wt1VFdabn9SaSLxeQSoY7r8WnRzWnRYWnRVWnRyWnR899LSyYaW2ta46aXHWnRo5:m1DD3A5b3hbO1
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Detect Xworm Payload
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Xworm family
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Disables RegEdit via registry modification
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Downloads MZ/PE file
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE
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Adds Run key to start application
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Legitimate hosting services abused for malware hosting/C2
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Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
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Drops file in System32 directory
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Sets desktop wallpaper using registry
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Pre-OS Boot
1Bootkit
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1