Managed XDR

windecryptor.7z (BlackMatter, Lockbit, DarkSide) — malware analysis report

File info

Filename
windecryptor.7z
File type
7-zip archive data, version 0.4
File size
20.7 KB
First seen
Last seen

Environment

w10/x86 en

Hashes

SHA1
8343fc64081512459d6730457cb2c766074d8931
SHA256
ce4d674820fe1729f8e0ada945792872413122afbc4af37743be2208c9c90a80
MD5
03b59becc09bf5f07b388ae446cb44be

Malwares

  • BlackMatter
  • Lockbit
  • DarkSide

Signatures

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 antidbg_setinformationthread: Attempts to evade debugger using NtSetInformationThread
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

Credential Access

T1552 infostealer_mail: Collects personal data from local email clients
T1552 infostealer_browser: Retrieves personal information from local Internet browsers
T1552.001 infostealer_bitcoin: Attempts to obtain access to Bitcoin/ALTCoin wallets
T1503 infostealer_browser: Retrieves personal information from local Internet browsers
T1555.003 cookie_files: Accesses cookie files
T1552 cookie_files: Accesses cookie files

Discovery

T1497 antidbg_setinformationthread: Attempts to evade debugger using NtSetInformationThread
T1083 crawls_directories: Opens a huge number of directories all over disk C: (possibly, searches for sensitive data)

Collection

T1114 infostealer_mail: Collects personal data from local email clients

Other

yara_rules: Static rules
only_exec_in_archive: The archive contains only an executable file
static_pe_duplicate_sections: The PE file structure contains anomalies: duplicate section names
require_administrator: Requests administrator privileges
test_check_service: Starts services
writes_data: Writes big amount of data to disk

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