Managed XDR

c-users-user-desktop-accounts.xls (Cobalt Strike) — malware analysis report

File info

Filename
c-users-user-desktop-accounts.xls
File type
Composite Document File V2 Document, Little Endian, Os: Windows, Version 10.0, Code page: 936, Last Saved By: , Name of Creating Application: WPS Office, Create Time/Date: Fri May 12 11:23:08 2023, Last Saved Time/Date: Sat Jul 5 08:28:02 2025, Security: 0
File size
45 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
f27b2a0fd62268b2e40a6846e7f0a834ad95d85e
SHA256
5ef4c4e055e2067872bde13d6b0eeb59d13926cc855715ae630b21e4b6776bfe
MD5
42f5bdbd4ab9d822237e220ef6fa4667

Malwares

  • Cobalt Strike

Signatures

Execution

T1064 office_macros_suspicious: Document contains suspicious macro
T1204.002 office_vb_load: Microsoft Office is loading VB DLL files (macros usage indicator)
T1064 office_macros: The document contains macroses (total: 4)
T1064 office_macros_strings: Feature lines found in document macro
T1064 office_macros_autoexec: The document contains an auto-start macro

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 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1497.002 async_mouse: Watches for mouse clicks using GetAsyncKeyState to detect human activity
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: 4)
T1064 office_macros_strings: Feature lines found in document macro
T1064 office_macros_autoexec: The document contains an auto-start macro

Discovery

T1497 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1497.002 async_mouse: Watches for mouse clicks using GetAsyncKeyState to detect human activity
T1082 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining

Other

yara_rules: Static rules
office_summary: The document contains suspicious metadata
break_limit_exceeded: Warning: function calls limit has been exceeded
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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