Managed XDR

wextract.exe-.mui (Amadey, Symmi) — malware analysis report

File info

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

Environment

win7/x86 en

Hashes

SHA1
31295f128ab6270513c5517a60d6e4ef73704393
SHA256
ef50d10dcff2c8ae26b3b534b19a65b8df4272e0fbe61c192c5a2746c3a852ce
MD5
77e04d4e089262aeca85e21660683715

Malwares

  • Amadey
  • Symmi

Signatures

Execution

T1059 autoit: AutoIt script execution detected
T1047 antivm_wmi: Uses WMI to detect virtual environment
T1047 has_wmi: Executes one or several WMI requests
T1059.003 executes_dropped_cmd: Executes dropped batch files
T1059.003 suspicious_batch: Suspicious batch
T1106 susp_callbacks: Suspicious usage of some WinAPI with callbacks

Persistence

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
T1574.011 persistence_services: Modifies Services registry key
T1543.003 persistence_services: Modifies Services registry key

Privilege Escalation

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
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
T1497.001 antivm_virtualpc: Attempts to detect VirtualPC
T1497.001 antisandbox_sunbelt: Attempts to detect SunBelt Sandbox
T1497.001 antisandbox_file: Attempts to detect a sandbox (checks the file name)
T1497.001 antivm_sandboxie: Attempts to detect Sandboxie
T1027.002 packer_themida: Themida packer signatures detected
T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1562.001 stops_security_center: Stops Security Center
T1497.001 antivm_wmi: Uses WMI to detect virtual environment
T1497.001 antivm_directory_objects: Scans directory objects, possibly to find VM indicators
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.003 antisandbox_idletime: Detects Windows Idle Time to determine the uptime
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1574.011 persistence_services: Modifies Services registry key
T1140 unpacking_utilities: Uses Windows utilities to unpack data
T1497.001 antivm_network_adapters: Checks NIC addresses
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
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

Credential Access

T1503 infostealer_browser: Retrieves personal information from local Internet browsers
T1552 infostealer_mail: Collects personal data from local email clients
T1552 infostealer_browser: Retrieves personal information from local Internet browsers
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
T1552 infostealer_ftp: Collects data from local FTP clients
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

T1497.001 antivm_virtualpc: Attempts to detect VirtualPC
T1497.001 antisandbox_sunbelt: Attempts to detect SunBelt Sandbox
T1497.001 antisandbox_file: Attempts to detect a sandbox (checks the file name)
T1497.001 antivm_sandboxie: Attempts to detect Sandboxie
T1518.001 antiav_detectfile: Attempts to detect installed antiviruses by a certain directory
T1518.001 antiav_detectservice: Attempts to detect installed antiviruses by a certain service
T1518.001 antiav_avast_libs: Attempts to detect Avast Antivirus by a certain library
T1497.001 antivm_wmi: Uses WMI to detect virtual environment
T1497.001 antivm_directory_objects: Scans directory objects, possibly to find VM indicators
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.003 antisandbox_idletime: Detects Windows Idle Time to determine the uptime
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1083 crawls_directories: Opens a huge number of directories all over disk C: (possibly, searches for sensitive data)
T1518.001 wmi_check_av: Uses WMI to check for installed antivirus software
T1057 has_wmi: Executes one or several WMI requests
T1057 process_interest: Enumerates processes
T1082 has_wmi: Executes one or several WMI requests
T1082 uses_windows_utilities: Uses Windows utilities for basic Windows functionality
T1497.001 antivm_network_adapters: Checks NIC addresses
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

Collection

T1114 infostealer_mail: Collects personal data from local email clients

Command and Control

T1071 network_irc: Connects to the IRC server, probably a botnet part
T1071.001 network_cnc_http: Suspicious HTTP traffic
T1105 lolbin_extrac32: Download or Copy file with Extrac32
T1568.002 dga_domains: Connects to DGA domains
T1071.001 network_http: Performs HTTP requests
T1071.001 wininet_openurl: Performs HTTP/HTTPS-requests using InternetOpenUrl
T1071.001 wininet_https: Performs HTTP/HTTPS requests using WinInet

Exfiltration

T1022 encrypts_pc_info: Collects and encrypts information about the computer (possibly for exfiltration)

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
suricata_alert: Malicious traffic detected
creates_many_processes: Spawns a lot of processes (over 70)
dll_mapping_exception: Failed mapping of dll with exception
drops_interpreter: Creates intrepreter binary file
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
dns_without_resolve: DNS query without a response
creates_doc: Creates (office) documents in the file system
codepage: Checks the system code page
executes_dropped_exe: Executes dropped exe files
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
creates_in_programdata: Creates files in the ProgramData directory
test_check_service: Starts services
checktokenmembership: Checks user token with CheckTokenMembership call
writes_data: Writes big amount of data to disk

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