Managed XDR

lawoffice.exe (BlackMatter, Lockbit) — malware analysis report

File info

Filename
lawoffice.exe
File type
PE32 executable (GUI) Intel 80386, for MS Windows
File size
159.5 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
f005b72d83bc292fad91b76bb5a82301d5a5b7a4
SHA256
01c81cc29fc455796042061fac08cca5a0f46b7c84c6ad84bb237cb13e29a6f6
MD5
8fe90853aecc84d7ea2595910c0ff323

Malwares

  • BlackMatter
  • Lockbit

Signatures

Execution

T1047 has_wmi: Executes one or several WMI requests

Persistence

T1574.011 persistence_services: Modifies Services registry key
T1543.003 persistence_services: Modifies Services registry key

Privilege Escalation

T1055.012 injection_runpe: Injects code into another process
T1574.011 persistence_services: Modifies Services registry key
T1543.003 persistence_services: Modifies Services registry key
T1134 sets_privilegies_via_rtladjustprivilege: Sets process privilege via RtlAdjustPrivilege
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

T1070.004 deletes_self: Moves to different location or removes the original executable file
T1055.012 injection_runpe: Injects code into another process
T1497 antidbg_setinformationthread: Attempts to evade debugger using NtSetInformationThread
T1574.011 persistence_services: Modifies Services registry key
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1134 sets_privilegies_via_rtladjustprivilege: Sets process privilege via RtlAdjustPrivilege
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process

Discovery

T1497 antidbg_setinformationthread: Attempts to evade debugger using NtSetInformationThread
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1518 locates_browser: Attempts to identify where browsers are installed

Collection

T1113 screenshot_file: Possibly, makes a screenshot and saves it to a file
T1074.001 access_recyclebin: Manipulation with recyclebin detected

Impact

T1561 wiper_zeroed_bytes: Overwrites multiple files with zero bytes (hex 00)
T1486 modifies_files2: Cryptolocker indicators detected (100 or more files are modified)
T1486 modifies_files: Cryptolocker indicators detected (renamed 100 or more files)
T1489 stops_service: Stops Windows services
T1489 service_control_stop: Stops services via ControlService

Other

yara_rules: Static rules
lockbit: Detected ransomware Lockbit
executes_dropped_exe: Executes dropped exe files
cryptolocker_wallpaper: Ransomware indicators detected (changes the desktop wallpaper file)
unexpected_exception: Unexpected exception
creates_suspended_process: Creates suspended process
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
writes_data: Writes big amount of data to disk

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