Managed XDR

vtdl_f4wi9mui (FormBookFormgrabber) — malware analysis report

File info

Filename
vtdl_f4wi9mui
File type
Composite Document File V2 Document, Little Endian, Os: Windows, Version 6.2, Code page: 1252, Name of Creating Application: Microsoft Excel, Create Time/Date: Sat Sep 16 00:00:00 2006, Last Saved Time/Date: Tue Nov 8 14:59:19 2022, Security: 1
File size
529 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
45c2eb81a41b3c0282b696af334a21637ccb2330
SHA256
744c1686065dc5955a640c92733581cde86edb45df6fabbe788d105c9dbb8d26
MD5
eaeff24aa5872f50aa640865e04ca793

Malwares

  • FormBookFormgrabber

Signatures

Execution

T1559 suricata_alert: Malicious traffic detected
T1559 executes_dropped_exe: Executes dropped exe files
T1203 exploit_CVE_2017_11882: Exploits CVE-2017-11882 vulnerability
T1059.001 suspicious_powershell: Suspicious document behaviour (creates powershell process)
T1559 formbook: FormBook stealer found
T1053.005 creates_tasks: Creates a delayed task using Task Manager
T1203 office_exploit_http: The document exhibits suspicious behaviour (performs HTTP requests)
T1559 creates_exe: Creates executable files in the file system
T1559 runs_utility_without_cmdline: Runs system utility without arguments (non-typical usage)
T1559 suspicious_process_network: Unusual process network activity detected
T1559 suspicious_process: Spawns a suspicious process
T1559 unexpected_exception: Unexpected exception
T1064 office_macros: The document contains macro
T1559 break_limit_exceeded: Warning: function calls limit has been exceeded
T1559 office_summary: The document contains suspicious metadata
T1559 get_sid_domain: Get user's SID
T1559 test_check_service: Starts services
T1559 create_rpc_bindings: Creates RPC connection
T1559 checktokenmembership: Checks user token with CheckTokenMembership call

Persistence

T1053.005 creates_tasks: Creates a delayed task using Task Manager

Privilege Escalation

T1053.005 creates_tasks: Creates a delayed task using Task Manager
T1055 injection_runpe_2: Executes injected code in another process
T1055.012 injection_runpe: Injects code into another process
T1055.002 inject_write_pe: Writes PE file to another process's memory

Defense Evasion

T1055 injection_runpe_2: Executes injected code in another process
T1055.012 injection_runpe: Injects code into another process
T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1027.002 unnamed_memory_regions_contains_pe: One or several unnamed memory regions are PE files
T1564.001 stealth_file: Creates hidden or system files
T1055.002 inject_write_pe: Writes PE file to another process's memory
T1497 antidbg_query_system: Checks for kernel debugger (SystemKernelDebuggerInformation)
T1497 antidbg_query_process: Checks if the process is being debugged (ProcessDebugPort)
T1497 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1064 office_macros: The document contains macro
T1070 stealth_window: A process created a hidden window

Discovery

T1497 antidbg_query_system: Checks for kernel debugger (SystemKernelDebuggerInformation)
T1497 antidbg_query_process: Checks if the process is being debugged (ProcessDebugPort)
T1518 locates_browser: Attempts to identify where browsers are installed
T1497 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1083 checks_recent_files: Attempt to check recently opened files through registry
T1082 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining

Command and Control

T1071.001 office_exploit_http: The document exhibits suspicious behaviour (performs HTTP requests)
T1071.001 network_cnc_http: Suspicious HTTP traffic
T1071.004 office_exploit_dns: The document exhibits suspicious behaviour (performs DNS requests)
T1071.001 network_http: Performs HTTP requests
T1071.001 wininet_https: Performs HTTP/HTTPS requests using WinInet

Other

yara_rules: Static rules
get_memory_status: Gets information about the virtual and physical memory of the system
get_username: Gets username

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