Managed XDR

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

File info

Filename
wextract.exe-.mui
File type
PE32+ executable (GUI) x86-64, for MS Windows
File size
1.8 MB
First seen
Last seen

Environment

win7/x64 en

Hashes

SHA1
6789c7dc3142326b021c5f90cab7702fde24fcc1
SHA256
39e2b69e045f2f3f089631b053f8127efd14537fa8899c4c07d914ec6a360f17
MD5
a154c1120991c5f2468b16d0816813c5

Malwares

  • Taurus Stealer
  • Tinba

Signatures

Resource Development

T1608.005 contacts_url_shortener: Connects to url shortening services

Execution

T1053.005 creates_tasks: Creates a delayed task using Task Scheduler
T1059 autoit: AutoIt script execution detected
T1047 antivm_wmi: Uses WMI to detect virtual environment
T1047 has_wmi: Executes one or several WMI requests

Persistence

T1053.005 creates_tasks: Creates a delayed task using Task Scheduler
T1547.009 suspicious_desktop_ini: Creates desktop.ini file with suspicious content

Privilege Escalation

T1055.002 inject_write_pe: Writes PE file to another process's memory
T1055.012 injection_runpe: Injects code into another process
T1053.005 creates_tasks: Creates a delayed task using Task Scheduler
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1547.009 suspicious_desktop_ini: Creates desktop.ini file with suspicious content

Defense Evasion

T1218 bypass_dev_utils: Executing .NET utility in a suspended state, potentially for injection
T1055.002 inject_write_pe: Writes PE file to another process's memory
T1218 suspicious_path_cmdline: Starts process with suspicious command line
T1055.012 injection_runpe: Injects code into another process
T1027.002 unnamed_memory_regions_contains_pe: One or several unnamed memory regions are PE files
T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1564.001 stealth_file: Creates hidden or system files
T1497 office_security_check: Checks Microsoft Office security settings
T1497.001 antivm_wmi: Uses WMI to detect virtual environment
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1480 system_default_lang_id_present: Checks the system language

Credential Access

T1552 infostealer_mail: Collects personal data from local email clients
T1552 infostealer_browser: Retrieves personal information from local Internet browsers
T1552 infostealer_im: Collects information about installed messengers
T1552 infostealer_ftp: Collects data from local FTP clients
T1552.001 infostealer_bitcoin: Attempts to obtain access to Bitcoin/ALTCoin wallets
T1552.001 infostealer_winscp: Collects information from configuration file of WinSCP
T1552.002 infostealer_steam: Attempts to collect information about Steam account
T1503 infostealer_browser: Retrieves personal information from local Internet browsers
T1552.001 infostealer_vpn: Collects information about installed VPN software
T1555.003 cookie_files: Accesses cookie files
T1555.004 windows_credential_manager: Acquire credentials from the Windows Credential Manager
T1552 cookie_files: Accesses cookie files

Discovery

T1497 office_security_check: Checks Microsoft Office security settings
T1497.001 antivm_wmi: Uses WMI to detect virtual environment
T1057 has_wmi: Executes one or several WMI requests
T1057 process_interest: Enumerates processes
T1083 crawls_directories: Opens a huge number of directories all over disk C: (possibly, searches for sensitive data)
T1497.003 antisandbox_sleep: The process attempted to slow down analysis

Collection

T1114 infostealer_mail: Collects personal data from local email clients

Command and Control

T1032 internet_security_options: Sets Internet connections options that are not secure
T1071 internet_security_options: Sets Internet connections options that are not secure
T1568.002 dga_domains: Connects to DGA domains
T1071.001 winhttp_https: Performs HTTP/HTTPS requests using WinHttp
T1071.001 wininet_https: Performs HTTP/HTTPS requests using WinInet

Other

yara_rules: Static rules
predator_or_taurus_behavior: Demonstrates behavioral signs of Taurus Stealer
modifies_certs: Attempts to generate or modify system certificates
multiple_useragents: Uses more than one unique User-Agent
creates_exe: Creates executable files in the file system
suspicious_process_network: Unusual process network activity detected
dns_without_resolve: DNS query without a response
process_crashed: One of the processes has failed
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
error_drawtext: An error occured while executing the file
get_policy_info: Retrieves information about a Policy object
test_check_service: Starts services
executes_dropped_exe: Executes dropped exe files
suricata_alert: Malicious traffic detected

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