Managed XDR

c-users-user-desktop-readme.doc-copy (njRAT) — malware analysis report

File info

Filename
c-users-user-desktop-readme.doc-copy
File type
Composite Document File V2 Document, Little Endian, Os: Windows, Version 10.0, Code page: 1252, Author: Virus Lab, Template: Normal.dotm, Last Saved By: Bruno, Revision Number: 4, Name of Creating Application: Microsoft Office Word, Total Editing Time: 01:00, Create Time/Date: Wed Jun 16 21:03:00 1999, Last Saved Time/Date: Thu Jul 10 18:24:00 2025, Number of Pages: 1, Number of Words: 1, Number of Characters: 9, Security: 0
File size
81.5 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
c815942708630f4e0120841393332f73629aea78
SHA256
43b98de72f5b113654a83ab2032f84e992659ff23c4a8919b891590fc9eafb28
MD5
1ba22a4f3a224308470a99386afdf02f

Malwares

  • njRAT

Signatures

Execution

T1203 office_write_exe: Office document dropped an executable file
T1559 suspicious_process: Spawns a suspicious process
T1064 office_macros_suspicious: Document contains suspicious macro
T1064 office_macros: The document contains macroses (total: 2)
T1064 office_macros_strings: Feature lines found in document macro
T1064 office_macros_autoexec: The document contains an auto-start macro
T1204.002 office_vb_load: Microsoft Office is loading VB DLL files (macros usage indicator)

Privilege Escalation

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 office_security: Attempts to modify Microsoft Office security settings
T1064 office_macros_suspicious: Document contains suspicious macro
T1564 office_vba_stomping: VBA Stomping was detected in the document (the VBA source code and P-code are different)
T1497 evasion_trustrecords: Attempts to detect Sandbox exploring trusted documents
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1064 office_macros: The document contains macroses (total: 2)
T1064 office_macros_strings: Feature lines found in document macro
T1064 office_macros_autoexec: The document contains an auto-start macro

Credential Access

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

Discovery

T1497 evasion_trustrecords: Attempts to detect Sandbox exploring trusted documents
T1083 checks_recent_files: Attempt to check recently opened files through registry

Other

yara_rules: Static rules
executes_dropped_exe: Executes dropped exe files
creates_exe: Creates executable files in the file system
get_policy_info: Retrieves information about a Policy object
test_check_service: Starts services
antisandbox_check_graphics_card: Uses CreateDXGIFactory, potentially to detect graphics card
checktokenmembership: Checks user token with CheckTokenMembership call

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