Managed XDR

b70e78971fc44f84134471...0f66f41cd6100a1c95.exe (Conti, BlackMatter) — malware analysis report

File info

Filename
b70e78971fc44f8413447139afe777f19fd1b0d203f2d40f66f41cd6100a1c95.exe
File type
PE32 executable (GUI) Intel 80386, for MS Windows
File size
503.5 KB
First seen
Last seen

Environment

w10/x64 en

Hashes

SHA1
dfa652d5f4551af2771c9329d42185bc36cc26ef
SHA256
b70e78971fc44f8413447139afe777f19fd1b0d203f2d40f66f41cd6100a1c95
MD5
39af13642e6ecaf97c4b36eb81fa809f

Malwares

  • Conti
  • BlackMatter

Signatures

Execution

T1047 has_wmi: Executes one or several WMI requests
T1047 antivm_wmi: Uses WMI to detect virtual environment

Persistence

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup

Privilege Escalation

T1547.001 persistence_autorun: Makes itself run automatically on Windows startup
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

T1562.001 disables_app_launch: Modifies system policies to prevent several applications from running
T1497.001 antivm_wmi: Uses WMI to detect virtual environment
T1027.002 pe_features: Executable file has PE anomalies (may be false positive)
T1497 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497 evasion_prefetch: Attempts to detect Sandbox by process run count
T1497.001 antivm_generic_productname: Checks system product name in registry, possibly for anti-virtualization
T1134 opens_thread_token: Opens the access token associated with a thread
T1134 opens_process_token: Opens the access token associated with a process
T1027.002 packer_entropy: Probably contains compressed or encrypted data

Credential Access

T1552.001 infostealer_bitcoin: Attempts to obtain access to Bitcoin/ALTCoin wallets
T1555.004 windows_credential_manager: Acquire credentials from the Windows Credential Manager

Discovery

T1057 has_wmi: Executes one or several WMI requests
T1082 has_wmi: Executes one or several WMI requests
T1497.001 antivm_wmi: Uses WMI to detect virtual environment
T1083 crawls_directories: Opens a huge number of directories all over disk C: (possibly, searches for sensitive data)
T1057 process_interest: Enumerates processes
T1518 locates_browser: Attempts to identify where browsers are installed
T1497 evasion_printers: Attempts to detect Sandbox by exploring existing printers
T1497 evasion_prefetch: Attempts to detect Sandbox by process run count
T1497.001 antivm_generic_productname: Checks system product name in registry, possibly for anti-virtualization
T1016 get_hostname: Attempts to get hostname

Collection

T1074.001 access_recyclebin: Manipulation with recyclebin detected

Command and Control

T1071.001 winhttp_https: Performs HTTP/HTTPS requests using WinHttp

Impact

T1486 modifies_files: Cryptolocker indicators detected (renamed 500 or more files)
T1486 modifies_files2: Cryptolocker indicators detected (500 or more files are modified)
T1486 ransomware_files: Ransomware indicators detected BlackMatter (creates keys and the instruction on how to unlock the files)
T1486 mass_data_encryption: Encrypts data using the same key (possible ransomware behavior)
T1489 net_stop: Stops services through the use of net stop
T1489 service_control_stop: Stops services via ControlService

Other

yara_rules: Static rules
blackmatter: Detected ransomware BlackMatter
locker_taskmgr: Disables Windows Task Manager
creates_in_windows: Creates files in the Windows directory
cryptolocker_wallpaper: Ransomware indicators detected (changes the desktop wallpaper file)
network_bind: Starts servers listening at None
bitcoin_opencl: Installs the OpenCL library, possibly to mine bitcoins
dns_without_resolve: DNS query without a response
create_rpc_bindings: Creates RPC connection
creates_suspended_process: Creates suspended process
creates_in_programdata: Creates files in the ProgramData directory
suspicious_network_port: Performs TCP or UDP request to non-standard port
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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