Managed XDR

cryptor.exe (Conti, BlackMatter) — malware analysis report

File info

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

Environment

win7/x86 en

Hashes

SHA1
c6c8547ed95bb1df1212e8b893bbc4cef3693154
SHA256
e398bbf7cb5533430fa866627e28cbc0730b4f5a887f3f6b8f2f4c2b4dc23ac3
MD5
34dbabba981f96b24626b38aa38b5db8

Malwares

  • Conti
  • BlackMatter

Signatures

Execution

T1047 has_wmi: Executes one or several WMI requests

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

T1027.002 pe_features: Executable file has PE anomalies (may be false positive)
T1497 evasion_prefetch: Attempts to detect Sandbox by process run count
T1497.003 antisandbox_sleep: The process attempted to slow down analysis
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
T1555.003 cookie_files: Accesses cookie files
T1552 cookie_files: Accesses cookie files

Discovery

T1057 process_interest: Enumerates processes
T1083 crawls_directories: Opens a huge number of directories all over disk C: (possibly, searches for sensitive data)
T1518 locates_browser: Attempts to identify where browsers are installed
T1497 evasion_prefetch: Attempts to detect Sandbox by process run count
T1497.003 antisandbox_sleep: The process attempted to slow down analysis

Collection

T1074.001 access_recyclebin: Manipulation with recyclebin detected

Impact

T1486 modifies_files2: Cryptolocker indicators detected (500 or more files are modified)
T1486 modifies_files: Cryptolocker indicators detected (renamed 500 or more files)
T1486 ransomware_windows_possible: Ransomware indicators detected (possible ransom window creation)
T1490 vssadmin_delete_shadows: Attempt to delete volume shadow copies
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 behaviour)
T1489 service_control_stop: Stops services via ControlService

Other

yara_rules: Static rules
ce_info: BlackMatter Configuration Data found
blackmatter: Detected ransomware BlackMatter
ransomware_shadowcopy: Removes volume shadow copies
creates_in_windows: Creates files in the Windows directory
cryptolocker_wallpaper: Ransomware indicators detected (changes the desktop wallpaper file)
process_crashed: One of the processes has failed
unexpected_exception: Unexpected exception
creates_in_programdata: Creates files in the ProgramData directory
test_check_service: Starts services
writes_data: Writes big amount of data to disk

Related reports

Managed XDR