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
4.2 MB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
59b7a98a6ab742ebc8d7a3aa80a2cf0d2daf7bd4
SHA256
cb64c8fcab95eed5bec912759e355e2679b58c55682a315d3a48adcab6f57ec6
MD5
969ec2b8727c70bb2bb54d8372fcc9b8

Malwares

  • Amadey
  • Symmi

Signatures

Execution

T1569.002 persistence_service: Starts newly created service
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

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
T1543.003 creates_service: Creates a service, that will start automatically
T1574 dropper_dll: Creates DLL, which is then loaded into the process
T1574.011 persistence_services: Modifies Services registry key
T1543.003 persistence_services: Modifies Services registry key
T1542.003 bootkit_like_low_level_disk_access: Bootkit-like low level disk access

Privilege Escalation

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
T1055.002 inject_write_pe: Writes PE file to another process's memory
T1055.012 injection_runpe: Injects code into another process
T1543.003 creates_service: Creates a service, that will start automatically
T1574 dropper_dll: Creates DLL, which is then loaded into the process
T1574.011 persistence_services: Modifies Services registry key
T1543.003 persistence_services: Modifies Services registry key
T1134 sets_privilegies_via_adjusttokenprivileges: Sets process privilege via AdjustTokenPrivileges
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

T1055.002 inject_write_pe: Writes PE file to another process's memory
T1055.012 injection_runpe: Injects code into another process
T1562.001 disables_security: Disables Windows Security options
T1006 direct_disc_access: Direct disk access has been detected
T1027.002 unnamed_memory_regions_contains_pe: One or several unnamed memory regions are PE files
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
T1574 dropper_dll: Creates DLL, which is then loaded into the process
T1574.011 persistence_services: Modifies Services registry key
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_adjusttokenprivileges: Sets process privilege via AdjustTokenPrivileges
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
T1542.003 bootkit_like_low_level_disk_access: Bootkit-like low level disk access
T1070 stealth_window: A process created a hidden window

Credential Access

T1555.003 cookie_files: Accesses cookie files
T1552 cookie_files: Accesses cookie files

Discovery

T1033 sam_users_discovery: Enumerates users or groups in system with SAM API
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
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1082 uses_windows_utilities: Uses Windows utilities for basic Windows functionality
T1518 locates_browser: Attempts to identify where browsers are installed
T1087 has_wmi: Executes one or several WMI requests
T1087.001 local_account_discovery: Enumerates local accounts
T1049 list_ts_rdp_sessions: Lists ts/rdp sessions
T1497.001 antivm_generic_video: Checks information about video adapters in registry, possibly for anti-virtualization
T1057 has_wmi: Executes one or several WMI requests
T1082 reads_csrss: Attempts to read csrss.exe memory
T1082 has_wmi: Executes one or several WMI requests

Command and Control

T1071 network_irc: Connects to the IRC server, probably a botnet part
T1071.001 network_cnc_http: Suspicious HTTP traffic
T1071.001 network_http: Performs HTTP requests
T1102.003 cloud_github: Connects to cloud services of Github (potentially for malicious payload delivery)
T1071.001 winhttp_https: Performs HTTP/HTTPS requests using WinHttp
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)
networkdyndns_checkip: Connects to a Dynamic DNS domain
dll_mapping_exception: Failed mapping of dll with exception
creates_in_windows: Creates files in the Windows directory
modifies_certs: Attempts to generate or modify system certificates
creates_exe: Creates executable files in the file system
create_process_failed: Could not start the process
suspicious_process_network: Unusual process network activity detected
codepage: Checks the system code page
executes_dropped_exe: Executes dropped exe files
unexpected_exception: Unexpected exception
network_ftp: Performs FTP requests
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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