Managed XDR

document_signed_test.doc (njRAT) — malware analysis report

File info

Filename
document_signed_test.doc
File type
Composite Document File V2 Document, Little Endian, Os: Windows, Version 10.0, Code page: 1251, Author: Administrator, Template: Normal.dotm, Last Saved By: Administrator, Revision Number: 15, Name of Creating Application: Microsoft Office Word, Total Editing Time: 38:00, Create Time/Date: Thu May 2 15:14:00 2024, Last Saved Time/Date: Sat May 4 13:37:00 2024, Number of Pages: 1, Number of Words: 0, Number of Characters: 1, Security: 0
File size
246.5 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
7bf6b1135ed7c38c7b69f0baf0111eec4dd10f08
SHA256
2236ffcf2856d5c9c2dedf180654cf318596614be450f6b24621dc13d7370dbf
MD5
7a5cc3ab48c78ed9e9a52cbaa04c79bc

Malwares

  • njRAT

Signatures

Execution

T1059.001 suspicious_powershell: Suspicious document behaviour (creates powershell process)
T1203 office_exploit_creates_cmd: The document exhibits suspicious behaviour (creates a cmd.exe process)
T1064 office_macros_suspicious: Document contains suspicious macro
T1059.001 suspicious_process: Spawns a suspicious process
T1064 office_macros: The document contains 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

T1064 office_macros_suspicious: Document contains suspicious macro
T1497.001 antivm_queries_computername: Retrieves the computer name
T1064 office_macros: The document contains macro
T1064 office_macros_autoexec: The document contains an auto-start macro
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process

Credential Access

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

Discovery

T1497.001 antivm_queries_computername: Retrieves the computer name
T1135 server_share_info: Retrieves information about each shared resource on a server
T1083 checks_recent_files: Attempt to check recently opened files through registry

Other

yara_rules: Static rules
dead_host: Connects to IP addresses that do not respond to requests
office_summary: The document contains suspicious metadata
create_rpc_bindings: Creates RPC connection
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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