General
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Target
x4rr.exe
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Size
200KB
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Sample
240621-h2j8kazhph
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MD5
68cb20861106daca8c5a347b8b4fac1b
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SHA1
9faa34aff1e704b593b308ca516777343b497369
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SHA256
ac8734f52d12c32450bd49a97fc803c730e4f03b89698bb49e9db473c7730400
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SHA512
9c0ff47641457dcd5d350d39e0c843568b97bb25ea45e086b9cfd2adbbcfa405ad0c2cbe18637409c7369c719e98b40984cde01e68b8a285a998dd318d33bfff
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SSDEEP
3072:uO2MN1EALtYwx4XqLqejJ3uW4biLseLQGfFJgcmodkUkJp9nK2jJWe96YTgWa:uIN1EAr4SeBid/eedEKMJWe96Yz
Static task
static1
Behavioral task
behavioral1
Sample
x4rr.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
x4rr.exe
Resource
win10v2004-20240508-en
Malware Config
Extracted
xworm
127.0.0.1:13576
edition-eat.gl.at.ply.gg:13576
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Install_directory
%AppData%
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install_file
x4svchost.exe
Targets
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Target
x4rr.exe
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Size
200KB
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MD5
68cb20861106daca8c5a347b8b4fac1b
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SHA1
9faa34aff1e704b593b308ca516777343b497369
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SHA256
ac8734f52d12c32450bd49a97fc803c730e4f03b89698bb49e9db473c7730400
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SHA512
9c0ff47641457dcd5d350d39e0c843568b97bb25ea45e086b9cfd2adbbcfa405ad0c2cbe18637409c7369c719e98b40984cde01e68b8a285a998dd318d33bfff
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SSDEEP
3072:uO2MN1EALtYwx4XqLqejJ3uW4biLseLQGfFJgcmodkUkJp9nK2jJWe96YTgWa:uIN1EAr4SeBid/eedEKMJWe96Yz
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Detect Xworm Payload
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Modifies security service
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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 Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Create or Modify System Process
1Windows Service
1Pre-OS Boot
1Bootkit
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Create or Modify System Process
1Windows Service
1Scheduled Task/Job
1Scheduled Task
1