General
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Target
x4svchost.exe
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Size
762KB
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Sample
240701-v87cws1bjg
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MD5
148ec472df90b0fb274c3ce2ad2e811f
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SHA1
378ba02b08494b36ff5a2674cf99eba6c7025d6a
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SHA256
a08b846be9052a2614ef6a6920260d465774f5da9926f6d08449a2e4eb27b787
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SHA512
ab6764b598d538bc726a1e0baf02c8c4a2ccdedf77ff6b3ee63d1e27c0a05e13423142b86f38afbd9462c0d90b5c3a9963a30e110145aca455ffa5403375c5b1
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SSDEEP
12288:0sjApTtnb0TbQxMM90CL7VmADH2eJGCOTJfVXwAfIXZqPtbxZWdezgrrNo02UBYW:djuTt4TbQRjDH2eJQTNqcWOVZK1y02UH
Static task
static1
Behavioral task
behavioral1
Sample
x4svchost.exe
Resource
win7-20240221-en
Malware Config
Extracted
xworm
session-chief.gl.at.ply.gg:36125
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Install_directory
%LocalAppData%
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install_file
x4usb.exe
Targets
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Target
x4svchost.exe
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Size
762KB
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MD5
148ec472df90b0fb274c3ce2ad2e811f
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SHA1
378ba02b08494b36ff5a2674cf99eba6c7025d6a
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SHA256
a08b846be9052a2614ef6a6920260d465774f5da9926f6d08449a2e4eb27b787
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SHA512
ab6764b598d538bc726a1e0baf02c8c4a2ccdedf77ff6b3ee63d1e27c0a05e13423142b86f38afbd9462c0d90b5c3a9963a30e110145aca455ffa5403375c5b1
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SSDEEP
12288:0sjApTtnb0TbQxMM90CL7VmADH2eJGCOTJfVXwAfIXZqPtbxZWdezgrrNo02UBYW:djuTt4TbQRjDH2eJQTNqcWOVZK1y02UH
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Detect Xworm Payload
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Suspicious use of NtCreateUserProcessOtherParentProcess
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Sets service image path in registry
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Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Drops startup file
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Executes dropped EXE
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Adds Run key to start application
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
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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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Suspicious use of SetThreadContext
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MITRE ATT&CK Matrix ATT&CK v13
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Pre-OS Boot
1Bootkit
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2