Managed XDR

sleestak_payload_1.bin (Remcos) — malware analysis report

File info

Filename
sleestak_payload_1.bin
File type
SMTP mail, ASCII text
File size
423.8 KB
First seen
Last seen

Environment

w10/x64 en

Hashes

SHA1
7dd5dd49c0b2f0fbf4a489998546aaace46fb0b8
SHA256
9ddb7cac72fa387ed71fe3f31cb1f5378e8a6805d6fec14390cbe4218f93f361
MD5
0934fbfcb5a59cf8396351ae5402b436

Malwares

  • Remcos

Signatures

Execution

T1059.001 suspicious_powershell: Creates suspicious PowerShell process
T1047 antivm_wmi: Uses WMI to detect virtual environment
T1047 has_wmi: Executes one or several WMI requests
T1059.001 suspicious_process: Spawns a suspicious process

Persistence

T1037 persistence_autorun: Makes itself run automatically on Windows startup

Privilege Escalation

T1037 persistence_autorun: Makes itself run automatically on Windows startup
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

T1564.001 stealth_file: Creates hidden or system files
T1497.001 antivm_wmi: Uses WMI to detect virtual environment
T1070 stealth_window: A process created a hidden window
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 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497.001 antisandbox_script_timer: Detected script timer window (indicative of sleep style evasion)
T1497.001 antivm_generic_productname: Checks system product name in registry, possibly for anti-virtualization
T1562.001 amsi_patching_attempt: Attempts to patch Microsoft AMSI protection (amsi.dll)

Credential Access

T1552 infostealer_mail: Collects personal data from local email clients
T1552 infostealer_browser: Retrieves personal information from local Internet browsers
T1503 infostealer_browser: Retrieves personal information from local Internet browsers
T1552 infostealer_im: Collects information about installed messengers
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_wmi: Uses WMI to detect virtual environment
T1082 has_wmi: Executes one or several WMI requests
T1057 has_wmi: Executes one or several WMI requests
T1518 recon_programs: Collects information about installed programs
T1518 locates_browser: Attempts to identify where browsers are installed
T1497 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497.001 antisandbox_script_timer: Detected script timer window (indicative of sleep style evasion)
T1497.001 antivm_generic_productname: Checks system product name in registry, possibly for anti-virtualization

Collection

T1114 infostealer_mail: Collects personal data from local email clients

Command and Control

T1071.001 network_http: Performs HTTP requests
T1071.001 winhttp_https: Performs HTTP/HTTPS requests using WinHttp

Other

copies_self: Creates a copy of itself
network_bind: Starts servers listening at None
creates_exe: Creates executable files in the file system
network_powershell: PowerShell process network connection detected
no_graphical_activity: No graphic activity
create_rpc_bindings: Creates RPC connection
creates_suspended_process: Creates suspended process
suspicious_network_port: Performs TCP or UDP request to non-standard port
test_check_service: Starts services
yara_rules: Static rules

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