General
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Target
vir.exe
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Size
286.1MB
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Sample
240524-ntfhasfe96
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MD5
6bc843fcda3370c21284715cc6949d72
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SHA1
4e95631af3d2a87831599233390f62549fdcc8ad
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SHA256
18cdbfed464f46936c57294978d0efe89e4fc7439435645bc2efcb130b5bb1e7
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SHA512
591964023d2e44519722666889434720870d363671aaaa13df1d005c76df82df0107f02a6f4197cbcbc1b4c88a18a755118d17617dc7e9c41d291ef79d59018c
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SSDEEP
6291456:HdHVeV6odBeWFv1k4R4b0ewZkhT4ofHwJjvZDQPf2tLSkHt:9AQWeSWgfecGT4RjvqP85N
Behavioral task
behavioral1
Sample
vir.exe
Resource
win10v2004-20240508-en
Malware Config
Extracted
quasar
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reconnect_delay
3000
Extracted
quasar
1.4.1
romka
jozzu420-51305.portmap.host:51305
0445c342-b551-411c-9b80-cd437437f491
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encryption_key
E1BF1D99459F04CAF668F054744BC2C514B0A3D6
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install_name
Romilyaa.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Windows 10 Boot
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subdirectory
SubDir
Targets
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Target
vir.exe
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Size
286.1MB
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MD5
6bc843fcda3370c21284715cc6949d72
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SHA1
4e95631af3d2a87831599233390f62549fdcc8ad
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SHA256
18cdbfed464f46936c57294978d0efe89e4fc7439435645bc2efcb130b5bb1e7
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SHA512
591964023d2e44519722666889434720870d363671aaaa13df1d005c76df82df0107f02a6f4197cbcbc1b4c88a18a755118d17617dc7e9c41d291ef79d59018c
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SSDEEP
6291456:HdHVeV6odBeWFv1k4R4b0ewZkhT4ofHwJjvZDQPf2tLSkHt:9AQWeSWgfecGT4RjvqP85N
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Modifies WinLogon for persistence
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Modifies firewall policy service
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Modifies visibility of file extensions in Explorer
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Modifies visiblity of hidden/system files in Explorer
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PrivateLoader
PrivateLoader is a downloader sold as a pay-per-install malware distribution service.
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Quasar payload
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Identifies VirtualBox via ACPI registry values (likely anti-VM)
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Modifies boot configuration data using bcdedit
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Blocklisted process makes network request
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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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Disables RegEdit via registry modification
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Downloads MZ/PE file
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Drops file in Drivers directory
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Modifies Installed Components in the registry
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Sets service image path in registry
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.NET Reactor proctector
Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.
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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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Modifies file permissions
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Modifies system executable filetype association
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Registers COM server for autorun
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Unexpected DNS network traffic destination
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
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Adds Run key to start application
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Checks for any installed AV software in registry
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Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
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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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Legitimate hosting services abused for malware hosting/C2
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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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Modifies WinLogon
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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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AutoIT Executable
AutoIT scripts compiled to PE executables.
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Drops file in System32 directory
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Suspicious use of NtSetInformationThreadHideFromDebugger
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Suspicious use of SetThreadContext
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
6Registry Run Keys / Startup Folder
4Winlogon Helper DLL
2Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Change Default File Association
1Pre-OS Boot
1Bootkit
1Scheduled Task/Job
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
6Registry Run Keys / Startup Folder
4Winlogon Helper DLL
2Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Change Default File Association
1Scheduled Task/Job
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1File and Directory Permissions Modification
1Hide Artifacts
2Hidden Files and Directories
2Impair Defenses
3Disable or Modify Tools
3Modify Registry
15Pre-OS Boot
1Bootkit
1Subvert Trust Controls
1Install Root Certificate
1Virtualization/Sandbox Evasion
1