Managed XDR

wextract.exe-.mui (Tinba) — malware analysis report

File info

Filename
wextract.exe-.mui
File type
PE32 executable (GUI) Intel 80386, for MS Windows
File size
4.3 MB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
287b092b5d8152870cec006e3f2a2974daade66a
SHA256
82eab7910286d096098a88d9f18aa2e554b27f9df46cc7b0be975b7118e6c438
MD5
ee9be65a77581138e1724fa50803b86e

Malwares

  • Tinba

Signatures

Execution

T1059.003 executes_dropped_cmd: Executes dropped batch files
T1047 has_wmi: Executes one or several WMI requests
T1059.003 suspicious_batch: Suspicious batch

Persistence

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

Privilege Escalation

T1574.011 persistence_services: Modifies Services registry key
T1543.003 persistence_services: Modifies Services registry key
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
T1027.002 packer_themida: Themida packer signatures detected
T1562.001 stops_security_center: Stops Security Center
T1574.011 persistence_services: Modifies Services registry key
T1027.002 packer_enigma: Enigma protector indicators detected
T1497.001 antivm_disk_size: Checks the amount of free disk space
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_generic_video: Checks information about video adapters in registry, possibly for anti-virtualization
T1497.001 antivm_queries_computername: Retrieves the computer name

Discovery

T1518.001 antiav_detectservice: Attempts to detect installed antiviruses by a certain service
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1082 uses_windows_utilities: Uses Windows utilities for basic Windows functionality
T1518 locates_browser: Attempts to identify where browsers are installed
T1497.001 antivm_generic_video: Checks information about video adapters in registry, possibly for anti-virtualization
T1497.001 antivm_queries_computername: Retrieves the computer name
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_exe: Creates executable files in the file system
create_process_failed: Could not start the process
codepage: Checks the system code page
process_crashed: One of the processes has failed
unexpected_exception: Unexpected exception
no_graphical_activity: No graphic activity
create_rpc_bindings: Creates RPC connection
has_pdb: This executable file has a PDB path
creates_suspended_process: Creates suspended process
get_policy_info: Retrieves information about a Policy object
test_check_service: Starts services
checktokenmembership: Checks user token with CheckTokenMembership call
executes_dropped_exe: Executes dropped exe files

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