Managed XDR

c-windows-3skit3.exe (BlackCat) — malware analysis report

File info

Filename
c-windows-3skit3.exe
File type
PE32 executable (GUI) Intel 80386 (stripped to external PDB), for MS Windows
File size
1.1 MB
First seen
Last seen

Environment

w10/x86 en

Hashes

SHA1
f5e7fda51a59ef4b7d69a75e3c88d3eaddb04265
SHA256
5e07cb0f5b09882c43662a6bdf61b73aac3e0a313f4e8ee82d45555251658a21
MD5
1ec182b82c900f8e40726dd38fa3d56a

Malwares

  • BlackCat

Signatures

Execution

T1047 has_wmi: Executes one or several WMI requests

Privilege Escalation

T1134 sets_privilegies_via_adjusttokenprivileges: Sets process privilege via AdjustTokenPrivileges
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 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 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
T1552 infostealer_mail: Collects personal data from local email clients

Discovery

T1057 process_interest: Enumerates processes
T1083 crawls_directories: Opens a huge number of directories all over disk C: (possibly, searches for sensitive data)
T1497 evasion_diskenum: Sandbox evasion using enumeration of partitions
T1497.001 antivm_queries_computername: Retrieves the computer name
T1016 get_hostname: Attempts to get hostname

Collection

T1114 infostealer_mail: Collects personal data from local email clients

Command and Control

T1071.001 wininet_openurl: Performs HTTP/HTTPS-requests using InternetOpenUrl

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_message: Ransomware indicators detected (possible ransom message creation)

Other

ransomware_blackcat: Detected BlackCat ransomware
accesses_mailslot: Performs a Mailslot ping, possibly used to get Domain Controller information
create_rpc_bindings: Creates RPC connection
access_recyclebin: Manipulation with recyclebin detected
test_check_service: Starts services
checktokenmembership: Checks user token with CheckTokenMembership call
writes_data: Writes big amount of data to disk
suricata_alert: Malicious traffic detected

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