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General
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Target
fwanufwa.exe
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Size
16.7MB
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Sample
240504-xv2xcsah36
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MD5
157d1a68e8368cb8ed46e3173122562b
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SHA1
9fda498d3101ab26afe01a630f7dfec445cbef0c
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SHA256
aa1beca1ce33a11a5c56a8a79d03e38b51339d0fe977495ad72eb8b068b379bc
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SHA512
94ccf7674c0f5f849cd28c04da7d4dd045107fe78ca98e62f622511c3953ef94b6f248703820b29d01713d062984b300b37d5ba1c7d2e5b15febeddcb603a83d
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SSDEEP
393216:Aw73+t5XTNsNiI7T+PkdymUAZDtGACaeIXHZzvhh0fLD4DbTpcF13X:AQ3+t7I7TXCaeaZzv7GDAcF13
Static task
static1
Behavioral task
behavioral1
Sample
fwanufwa.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
fwanufwa.exe
Resource
win10v2004-20240419-en
Malware Config
Extracted
xworm
94.13.152.8:25565
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Install_directory
%AppData%
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install_file
XClient.exe
Targets
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Target
fwanufwa.exe
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Size
16.7MB
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MD5
157d1a68e8368cb8ed46e3173122562b
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SHA1
9fda498d3101ab26afe01a630f7dfec445cbef0c
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SHA256
aa1beca1ce33a11a5c56a8a79d03e38b51339d0fe977495ad72eb8b068b379bc
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SHA512
94ccf7674c0f5f849cd28c04da7d4dd045107fe78ca98e62f622511c3953ef94b6f248703820b29d01713d062984b300b37d5ba1c7d2e5b15febeddcb603a83d
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SSDEEP
393216:Aw73+t5XTNsNiI7T+PkdymUAZDtGACaeIXHZzvhh0fLD4DbTpcF13X:AQ3+t7I7TXCaeaZzv7GDAcF13
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Deletes NTFS Change Journal
The USN change journal is a persistent log of all changes made to local files used by Windows Server systems.
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Detect Xworm Payload
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Identifies VirtualBox via ACPI registry values (likely anti-VM)
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Command and Scripting Interpreter: PowerShell
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
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Sets DLL path for service in the 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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Loads dropped DLL
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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 NtSetInformationThreadHideFromDebugger
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MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
2PowerShell
2Scheduled Task/Job
1System Services
1Service Execution
1Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Create or Modify System Process
1Windows Service
1Pre-OS Boot
1Bootkit
1Scheduled Task/Job
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Create or Modify System Process
1Windows Service
1Scheduled Task/Job
1Defense Evasion
Impair Defenses
1Modify Registry
2Pre-OS Boot
1Bootkit
1Virtualization/Sandbox Evasion
1