Managed XDR

attachment.xls (njRAT) — malware analysis report

File info

Filename
attachment.xls
File type
Composite Document File V2 Document, Little Endian, Os: Windows, Version 10.0, Code page: 1252, Author: IEUser, Last Saved By: IEUser, Name of Creating Application: Microsoft Excel, Create Time/Date: Tue Jan 29 08:37:51 2019, Last Saved Time/Date: Tue Jan 29 14:58:46 2019, Security: 0
File size
84.5 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
69b7ecf56c0f8c5f37ee8235745a48d9b31e7d4a
SHA256
05b819b3deb9a9ecdf2733336622709b9a1dcfe8db4f1e6c972ee89ced09b00e
MD5
f6f978910024cc51b85a62d71a59e8d1

Malwares

  • njRAT

Signatures

Execution

T1064 office_macros: The document contains macroses (total: 5)
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

T1564 office_vba_stomping: VBA Stomping was detected in the document (the VBA source code and P-code are different)
T1064 office_macros: The document contains macroses (total: 5)
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

T1083 checks_recent_files: Attempt to check recently opened files through registry

Other

yara_rules: Static rules
no_graphical_activity: No graphic activity
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

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