Managed XDR

vtdl_1734516508_54hq4_s_ (Nymeria) — malware analysis report

File info

Filename
vtdl_1734516508_54hq4_s_
File type
Microsoft OOXML
File size
3 MB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
8f6608778f5031d4fc1afdeb177fc96c96fd0a78
SHA256
0d426ca68a82c93d7d3a2fe8ba18fdd4ec7b7ae2d6873801867afccd06686ef6
MD5
55f047b0559d612be9f7ff03ca97179d

Malwares

  • Nymeria

Signatures

Execution

T1203 office_exploit_crash: Microsoft Office process crashes (failed exploitation of a vulnerability is possible)
T1059 autoit: AutoIt script execution detected
T1059 autoit_suspicious_script: Autoit contains suspicious script
T1106 susp_callbacks: Suspicious usage of some WinAPI with callbacks

Persistence

T1546.010 persistence_autorun: Makes itself run automatically on Windows startup
T1547 persistence_autorun: Makes itself run automatically on Windows startup
T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
T1547.004 persistence_autorun: Makes itself run automatically on Windows startup
T1546.007 netsh_helper_added: Netsh Helper DLL was added
T1546.010 installs_appinit: Installs itself in AppInit to inject into new processes
T1176 browser_addon: Installs browser extension
T1547 apppath_hijack: Achieves persistence by modifying AppPath in registry
T1547 gpextensions_autorun: Achieves persistence by modifying GPExtensions in registry
T1547 explorer_applications_autorun: Achieves persistence by modifying Windows Explorer-related applications in registry (MyComputer)

Privilege Escalation

T1546.010 persistence_autorun: Makes itself run automatically on Windows startup
T1547 persistence_autorun: Makes itself run automatically on Windows startup
T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
T1547.004 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
T1546.007 netsh_helper_added: Netsh Helper DLL was added
T1546.010 installs_appinit: Installs itself in AppInit to inject into new processes
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
T1547 apppath_hijack: Achieves persistence by modifying AppPath in registry
T1547 gpextensions_autorun: Achieves persistence by modifying GPExtensions in registry
T1547 explorer_applications_autorun: Achieves persistence by modifying Windows Explorer-related applications in registry (MyComputer)

Defense Evasion

T1027.002 unnamed_memory_regions_contains_pe: One or several unnamed memory regions are PE files
T1055.002 inject_write_pe: Writes PE file to another process's memory
T1055.012 injection_runpe: Injects code into another process
T1553.003 sip_hijacking: Replaces Dlls or function used by SIP or Trust Provider
T1027.002 unnamed_memory_regions: Code was executed in unnamed regions
T1562.001 office_security: Attempts to modify Microsoft Office security settings
T1562.001 browser_security: Modifies browser security settings
T1497.001 antisandbox_productid: Obtains Windows ProductID, probably to fingerprint a sandbox
T1497.002 detects_mousemove: Checks if the mouse is moving
T1027.002 packer_upx: The executable file is compressed using UPX
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1497 office_security_check: Checks Microsoft Office security settings
T1497 antidbg_query_process: Checks if the process is being debugged (ProcessDebugPort)
T1497.002 antisandbox_foregroundwindows: Checks whether any human activity is being performed by constantly checking whether the foreground window has changed
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 evasion_runmru: Attempts to detect Sandbox by Run MRU
T1497 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497 evasion_trustrecords: Attempts to detect Sandbox exploring trusted documents
T1497.001 antivm_queries_computername: Retrieves the computer name
T1497.002 async_mouse: Watches for mouse clicks using GetAsyncKeyState to detect human activity

Credential Access

T1552 infostealer_mail: Collects personal data from local email clients

Discovery

T1497.001 antisandbox_productid: Obtains Windows ProductID, probably to fingerprint a sandbox
T1497.002 detects_mousemove: Checks if the mouse is moving
T1057 pidbruteforce: Enumerates processes using PID Bruteforce
T1057 process_interest: Enumerates processes
T1497 office_security_check: Checks Microsoft Office security settings
T1497 antidbg_query_process: Checks if the process is being debugged (ProcessDebugPort)
T1497.002 antisandbox_foregroundwindows: Checks whether any human activity is being performed by constantly checking whether the foreground window has changed
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1518 locates_browser: Attempts to identify where browsers are installed
T1497 evasion_runmru: Attempts to detect Sandbox by Run MRU
T1497 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497 evasion_trustrecords: Attempts to detect Sandbox exploring trusted documents
T1497.001 antivm_queries_computername: Retrieves the computer name
T1497.002 async_mouse: Watches for mouse clicks using GetAsyncKeyState to detect human activity
T1083 checks_recent_files: Attempt to check recently opened files through registry
T1082 reads_csrss: Attempts to read csrss.exe memory

Collection

T1114 infostealer_mail: Collects personal data from local email clients

Other

yara_rules: Static rules
office_embedded: Office document contains embedded executable file(s)
caon_rat_behavior: Exhibits behavior characteristics of BoxCaon RAT
runs_utility_without_cmdline: Runs system utility without arguments (non-typical usage)
installs_bho: Installs Browser Helper Object
cryptolocker_wallpaper: Ransomware indicators detected (changes the desktop wallpaper file)
browser_startpage: Changes Internet Explorer homepage
process_crashed: One of the processes has failed
modifies_mouse_cursor: Changes mouse cursor parameters
create_rpc_bindings: Creates RPC connection
require_administrator: Requests administrator privileges
creates_suspended_process: Creates suspended process
break_limit_exceeded: Warning: function calls limit has been exceeded
get_policy_info: Retrieves information about a Policy object
creates_in_programdata: Creates files in the ProgramData directory
test_check_service: Starts services
antisandbox_check_graphics_card: Uses CreateDXGIFactory, potentially to detect graphics card
checktokenmembership: Checks user token with CheckTokenMembership call
open_winlogon_process: Trying to open winlogon process
enables_execute_access_on_stack: Enable execution access on stack

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