Managed XDR

vtdl_idv7o43b (QuasarRat) — malware analysis report

File info

Filename
vtdl_idv7o43b
File type
RAR archive data, v5
File size
7.9 MB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
aaac02a5320d5e80a7b6e8842249340e74165c20
SHA256
d6b9d2345d940f32b1ec5de039587f5daeb69a49a60cc8587ecbcfba163a782c
MD5
19151472f2172620cc9a9306aa885014

Malwares

  • QuasarRat

Signatures

Execution

T1059.001 suspicious_powershell: Creates suspicious powershell process
T1053.005 creates_tasks: Creates a delayed task using Task Scheduler
T1053.005 persistence_autorun: Makes itself run automatically on Windows startup
T1059.003 executes_dropped_cmd: Executes dropped batch files
T1047 has_wmi: Executes one or several WMI requests

Persistence

T1053.005 creates_tasks: Creates a delayed task using Task Scheduler
T1053.005 persistence_autorun: Makes itself run automatically on Windows startup

Privilege Escalation

T1053.005 creates_tasks: Creates a delayed task using Task Scheduler
T1053.005 persistence_autorun: Makes itself run automatically on Windows startup
T1134 sets_privilegies_via_adjusttokenprivileges: Sets process privilege via AdjustTokenPrivileges
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process

Defense Evasion

T1562.001 disables_security: Disables Windows Security options
T1564.001 stealth_file: Creates hidden or system files
T1564.004 removes_zoneid_ads: Attempts to hide the indications that the file was downloaded from the Internet
T1562.001 stops_security_center: Stops Security Center
T1497.003 antisandbox_sleep_utilities: Uses Windows utilities for pausing the execution
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1562 firewall_disable: Disables Firewall
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1134 sets_privilegies_via_adjusttokenprivileges: Sets process privilege via AdjustTokenPrivileges
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1070 stealth_window: A process created a hidden window
T1562 disables_etw: Attempt to disable security Windows Event Logging

Discovery

T1497.003 antisandbox_sleep_utilities: Uses Windows utilities for pausing the execution
T1082 uses_windows_utilities: Uses Windows utilities for basic Windows functionality
T1018 discovery_remote_system: Collects information about remote systems
T1518 locates_browser: Attempts to identify where browsers are installed
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1082 reads_csrss: Attempts to read csrss.exe memory

Impact

T1489 stops_service: Stops Windows services
T1489 stops_security_center: Stops Security Center
T1489 net_stop: Stops services through the use of net stop

Other

yara_rules: Static rules
creates_many_processes: Spawns a lot of processes (over 70)
creates_in_windows: Creates files in the Windows directory
creates_exe: Creates executable files in the file system
create_process_failed: Could not start the process
executes_dropped_exe: Executes dropped exe files
process_crashed: One of the processes has failed
unsigned_driver_drop: Sample is not signed and drops a device driver
create_rpc_bindings: Creates RPC connection
require_administrator: Requests administrator privileges
break_limit_exceeded: Warning: function calls limit has been exceeded
access_recyclebin: Manipulation with recyclebin detected
message_box: Displays a message
get_policy_info: Retrieves information about a Policy object
creates_in_programdata: Creates files in the ProgramData directory
checktokenmembership: Checks user token with CheckTokenMembership call

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