Managed XDR

build-lb3_rundll32.dll (Lockbit, BlackMatter) — malware analysis report

File info

Filename
build-lb3_rundll32.dll
File type
PE32 executable (DLL) (GUI) Intel 80386, for MS Windows
File size
147 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
76e211f63e50284776cbf5bf5076bda4bf913409
SHA256
14cc4a66babc3f0a2bf700068098809ba7836f92355d9b167df0aae5acced3fa
MD5
933992945706ccc066e387628dfdac2f

Malwares

  • Lockbit
  • BlackMatter

Signatures

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

T1055.012 injection_runpe: Injects code into another process
T1562.001 disables_security: Disables Windows Security options
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
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
T1497.001 antivm_queries_computername: Retrieves the computer name
T1070 stealth_window: A process created a hidden window
T1070.004 self_removal_command: Executes command to delete itself

Discovery

T1497 antidbg_setinformationthread: Attempts to evade debugger using NtSetInformationThread
T1518.001 antiav_detectservice: Attempts to detect installed antiviruses by a certain service
T1518 locates_browser: Attempts to identify where browsers are installed
T1087.001 local_account_discovery: Enumerates local accounts
T1497.001 antivm_queries_computername: Retrieves the computer name

Impact

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
no_graphical_activity: No graphic activity
create_rpc_bindings: Creates RPC connection
creates_suspended_process: Creates suspended process
message_box: Displays a message
error_drawtext: An error occured while executing the file
get_policy_info: Retrieves information about a Policy object
creates_in_programdata: Creates files in the ProgramData directory
test_check_service: Starts services
checktokenmembership: Checks user token with CheckTokenMembership call

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