Managed XDR

c-users-user-desktop-4b1a0000 — malware analysis report

File info

Filename
c-users-user-desktop-4b1a0000
File type
Microsoft Excel 2007+
File size
15.1 KB
First seen
Last seen

Environment

win7/x86 en

Hashes

SHA1
a170d5a60cb187d88fd6ff0aeb1c4f210b5aa296
SHA256
5c3a6d9663be20149407d959fdab46f27655b65d1c308ad6e8d13aeedfc14082
MD5
61177c37d09baf811956e32469b6fda4

Signatures

Execution

T1559 suspicious_process: Spawns a suspicious process
T1204.002 office_vb_load: Microsoft Office is loading VB DLL files (macros usage indicator)
T1064 office_macros: The document contains macroses (total: 2)
T1064 office_macros_autoexec: The document contains an auto-start macro

Privilege Escalation

T1134 sets_privilegies_via_rtladjustprivilege: Sets process privilege via RtlAdjustPrivilege
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

T1497 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1134 sets_privilegies_via_rtladjustprivilege: Sets process privilege via RtlAdjustPrivilege
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1480 system_default_lang_id_present: Checks the system language
T1064 office_macros: The document contains macroses (total: 2)
T1064 office_macros_autoexec: The document contains an auto-start macro

Credential Access

T1056.001 infostealer_keylogger: Keylogger (intercepts keystrokes)

Discovery

T1057 pidbruteforce: Enumerates processes using PID Bruteforce
T1497 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1083 checks_recent_files: Attempt to check recently opened files through registry
T1082 windows_enumthread: Attempts to enumerate windows using EnumThreadWindows and SendMessage for text obtaining

Collection

T1560.001 archive_via_utility: Detected archiving data via utility
T1056.001 infostealer_keylogger: Keylogger (intercepts keystrokes)

Impact

T1486 modifies_files2: Cryptolocker indicators detected (100 or more files are modified)
T1529 shutdown_system: Shuts the system down

Other

creates_many_processes: Spawns a lot of processes (over 70)
creates_suspended_process: Creates suspended process
break_limit_exceeded: Warning: function calls limit has been exceeded
message_box: Displays a message
rpc_listen: Waits for 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