Managed XDR

c-windows-installer-534487.msi (BlackMatter, BlackCat) — malware analysis report

File info

Filename
c-windows-installer-534487.msi
File type
Composite Document File V2 Document, Little Endian, Os: Windows, Version 6.2, MSI Installer, Code page: 1252, Title: Google Chrome - UNREGISTERED - Wrapped using MSI Wrapper from www.exemsi.com 129.0.6668.59, Subject: Google Chrome - UNREGISTERED - Wrapped using MSI Wrapper from www.exemsi.com, Author: Google LLC, Keywords: Installer, Template: x64;1033, Revision Number: {61C53E66-AA92-48F6-B94E-B5390BDDBEAB}, Create Time/Date: Thu Jan 11 14:59:38 2024, Last Saved Time/Date: Thu Jan 11 14:59:38 2024, Number of Pages: 200, Number of Words: 12, Name of Creating Application: MSI Wrapper (11.0.53.0), Security: 2
File size
452 KB
First seen
Last seen

Environment

w10/x64 en

Hashes

SHA1
28cbaad145e394b58c5f7b5556bfe29163e02b99
SHA256
f583b3aa5204fdb45ce32286708027dbbf9d65202293b84403f9680337e78681
MD5
0e4872d9c560c43f5fdb5ad091786837

Malwares

  • BlackMatter
  • BlackCat

Signatures

Execution

T1047 has_wmi: Executes one or several WMI requests
T1059.003 suspicious_process: Spawns a suspicious process

Persistence

T1574.011 persistence_services: Modifies Services registry key
T1543.003 persistence_services: Modifies Services registry key
T1574 dropper_dll: Creates DLL, which is then loaded into the process

Privilege Escalation

T1055.012 injection_runpe: Injects code into another process
T1574.011 persistence_services: Modifies Services registry key
T1543.003 persistence_services: Modifies Services registry key
T1574 dropper_dll: Creates DLL, which is then loaded into the process
T1134 sets_privilegies_via_adjusttokenprivileges: Sets process privilege via AdjustTokenPrivileges
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

T1055.012 injection_runpe: Injects code into another process
T1562.001 disables_security: Disables Windows Security options
T1497 antidbg_setinformationthread: Attempts to evade debugger using NtSetInformationThread
T1564.001 stealth_file: Creates hidden or system files
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1222 icacls: May obtain or change Discretionary access control lists (DACLs)
T1140 unpacking_utilities: Uses Windows utilities to unpack data
T1574.011 persistence_services: Modifies Services registry key
T1497 evasion_diskenum: Sandbox evasion using enumeration of partitions
T1497.001 antivm_queries_computername: Retrieves the computer name
T1134 sets_privilegies_via_adjusttokenprivileges: Sets process privilege via AdjustTokenPrivileges
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
T1070 stealth_window: A process created a hidden window
T1574 dropper_dll: Creates DLL, which is then loaded into the process

Credential Access

T1552 infostealer_mail: Collects personal data from local email clients
T1552.001 infostealer_bitcoin: Attempts to obtain access to Bitcoin/ALTCoin wallets
T1552 infostealer_browser: Retrieves personal information from local Internet browsers
T1503 infostealer_browser: Retrieves personal information from local Internet browsers

Discovery

T1497 antidbg_setinformationthread: Attempts to evade debugger using NtSetInformationThread
T1518.001 antiav_detectservice: Attempts to detect installed antiviruses by a certain service
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
T1518 locates_browser: Attempts to identify where browsers are installed
T1497 evasion_diskenum: Sandbox evasion using enumeration of partitions
T1497.001 antivm_queries_computername: Retrieves the computer name

Collection

T1114 infostealer_mail: Collects personal data from local email clients
T1074.001 access_recyclebin: Manipulation with recyclebin detected

Impact

T1486 ransomware_windows_possible: Ransomware indicators detected (possible ransom window creation)
T1486 modifies_files2: Cryptolocker indicators detected (500 or more files are modified)
T1486 modifies_files: Cryptolocker indicators detected (renamed 500 or more files)
T1561 wiper_zeroed_bytes: Overwrites multiple files with zero bytes (hex 00)
T1489 stops_service: Stops Windows services
T1486 ransomware_message: Ransomware indicators detected (possible ransom message creation)
T1486 ransomware_files: Ransomware indicators detected BlackMatter (creates keys and the instruction on how to unlock the files)
T1565.001 overwrites_firefox_settings: Modifies Mozilla Firefox settings
T1489 service_control_stop: Stops services via ControlService

Other

yara_rules: Static rules
ransomware_blackcat: Detected BlackCat ransomware
executes_dropped_exe: Executes dropped exe files
opens_document: Opens office documents
creates_exe: Creates executable files in the file system
creates_in_windows: Creates files in the Windows directory
create_rpc_bindings: Creates RPC connection
creates_suspended_process: Creates suspended process
msi_has_custom_action: MSI file contains custom action
creates_in_programdata: Creates files in the ProgramData directory
test_check_service: Starts services
checktokenmembership: Checks user token with CheckTokenMembership call
writes_data: Writes big amount of data to disk

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