General
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Target
VIR Virus.zip
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Size
295.2MB
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Sample
240528-1apcbach8x
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MD5
4568557191778f07e87931a3cb8bb19f
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SHA1
2de50b104aaa20166ac4a5ca54ffa2f7a10967ff
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SHA256
10749906bc204c15934fdba1c3c5bb113156aadacd47d8609a3e543620f05c9a
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SHA512
e29c43a141e5b83bb83bbb2cb86ce7b2b100163e1ec5557522cf4b6c5d2e83066539b4359f0adce282517300d5ce988e7c7f88a03b8d984c303a49033b915d6c
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SSDEEP
6291456:iw1tbMVOw5GAdBLYWk8KmMzMr+Z3NaUSCs5rTZ/eLRl5:i8QhooYQKtzMr+ZdG/Y
Behavioral task
behavioral1
Sample
VIR Virus.zip
Resource
win10v2004-20240426-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 Virus.zip
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Size
295.2MB
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MD5
4568557191778f07e87931a3cb8bb19f
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SHA1
2de50b104aaa20166ac4a5ca54ffa2f7a10967ff
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SHA256
10749906bc204c15934fdba1c3c5bb113156aadacd47d8609a3e543620f05c9a
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SHA512
e29c43a141e5b83bb83bbb2cb86ce7b2b100163e1ec5557522cf4b6c5d2e83066539b4359f0adce282517300d5ce988e7c7f88a03b8d984c303a49033b915d6c
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SSDEEP
6291456:iw1tbMVOw5GAdBLYWk8KmMzMr+Z3NaUSCs5rTZ/eLRl5:i8QhooYQKtzMr+ZdG/Y
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Detect Umbral payload
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Modifies WinLogon for persistence
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Quasar payload
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Blocklisted process makes network request
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Drops file in Drivers directory
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Manipulates Digital Signatures
Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to obtain their binary as valid.
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Modifies Windows Firewall
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Possible privilege escalation attempt
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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 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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Registers COM server for autorun
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Adds Run key to start application
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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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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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AutoIT Executable
AutoIT scripts compiled to PE executables.
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Drops file in System32 directory
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Sets desktop wallpaper using registry
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Suspicious use of SetThreadContext
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Target
vir.exe
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Size
336.1MB
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MD5
bc82ea785da1180a8a964b3e54ad106c
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SHA1
4c1952ce778455af8ed10dca7b9f77d7815e8d0a
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SHA256
c283ed662a29c18b117ba63ac41cca356934c6a29a1eb66e30d8305637e3411b
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SHA512
62bf34d75e913a47185664a34555678d0b8c2cf03c9e922b0bdcb085713322bafba2bf396b43a4cda7e0be6d315aea027bba29c628fe561d01e3026b4e0b405b
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SSDEEP
6291456:72qVJw+odBeWFv1k4R4b0ewZkhT4ofHwJjvZDQPf2tLSkHZdHVeVF0oJ:yr+WeSWgfecGT4RjvqP85/A33
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Detect Umbral payload
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Modifies firewall policy service
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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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Downloads MZ/PE file
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Drops file in Drivers directory
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Manipulates Digital Signatures
Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to obtain their binary as valid.
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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 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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Drops Chrome extension
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Drops desktop.ini file(s)
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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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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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Sets desktop wallpaper using registry
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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
5Registry Run Keys / Startup Folder
4Winlogon Helper DLL
1Create or Modify System Process
2Windows Service
2Event 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
5Registry Run Keys / Startup Folder
4Winlogon Helper DLL
1Create or Modify System Process
2Windows Service
2Event 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
1Hidden Files and Directories
1Impair Defenses
4Disable or Modify System Firewall
1Disable or Modify Tools
3Modify Registry
13Pre-OS Boot
1Bootkit
1Subvert Trust Controls
2Install Root Certificate
1SIP and Trust Provider Hijacking
1Virtualization/Sandbox Evasion
1