Managed XDR

spreadsheet.xls (njRAT) — malware analysis report

File info

Filename
spreadsheet.xls
File type
Composite Document File V2 Document, Little Endian, Os: Windows, Version 6.1, Code page: 1251, Author: Microsoft Corporation, Last Saved By: 1, Name of Creating Application: Microsoft Excel, Create Time/Date: Tue Oct 8 23:32:33 1996, Last Saved Time/Date: Mon Jan 19 12:57:56 2015, Security: 0
File size
24 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
5fc06520ed4eb2a31bd80959314685e1409e4c85
SHA256
e9e4737ce845604931776104d626ba4292c22337a3991ea0662910ce11b0a77e
MD5
5efb4f1f0324401f6818c4648e5cacab

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 macroses (total: 6)
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)
T1059.001 url_cmdline: Cmdline of process contains URL
T1059.003 url_cmdline: Cmdline of process contains URL

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
T1140 unpacking_utilities: Uses Windows utilities to unpack data
T1497 evasion_trustrecords: Attempts to detect Sandbox exploring trusted documents
T1497 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1064 office_macros: The document contains macroses (total: 6)
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 evasion_trustrecords: Attempts to detect Sandbox exploring trusted documents
T1497 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1082 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
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
get_policy_info: Retrieves information about a Policy object
antisandbox_check_graphics_card: Uses CreateDXGIFactory, potentially to detect graphics card

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