Managed XDR

c-windows-707wk.exe (BlackMatter, Lockbit, DarkSide) — malware analysis report

File info

Filename
c-windows-707wk.exe
File type
PE32 executable (GUI) Intel 80386, for MS Windows
File size
95 KB
First seen
Last seen

Environment

w10/x86 en

Hashes

SHA1
951ebe2da599f1119497046c90b3ec9684063ec6
SHA256
1c2c30813fac0c79e2d5443d298b7eb49fb382c77a272f2896f19ca677752eb7
MD5
acae510fdbdfb3321064050a97541330

Malwares

  • BlackMatter
  • Lockbit
  • DarkSide

Signatures

Execution

T1047 has_wmi: Executes one or several WMI requests

Persistence

T1574.011 persistence_services: Modifies Services registry key
T1543.003 persistence_services: Modifies Services registry key

Privilege Escalation

T1574.011 persistence_services: Modifies Services registry key
T1543.003 persistence_services: Modifies Services registry key
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
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1574.011 persistence_services: Modifies Services registry key
T1027.002 packer_entropy: Probably contains compressed or encrypted data
T1497.001 antivm_queries_computername: Retrieves the computer name
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

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

Discovery

T1497 antidbg_setinformationthread: Attempts to evade debugger using NtSetInformationThread
T1497.001 antivm_disk_size: Checks the amount of free disk space
T1497.001 antivm_queries_computername: Retrieves the computer name

Collection

T1113 screenshot_file: Possibly, makes a screenshot and saves it to a file
T1114 infostealer_mail: Collects personal data from local email clients
T1074.001 access_recyclebin: Manipulation with recyclebin detected

Command and Control

T1071 internet_security_options: Sets Internet connections options that are not secure
T1071.001 network_cnc_http: Suspicious HTTP traffic
T1032 internet_security_options: Sets Internet connections options that are not secure
T1071.001 network_http: Performs HTTP requests
T1071.001 wininet_https: Performs HTTP/HTTPS requests using WinInet

Impact

T1489 stops_service: Stops Windows services
T1486 modifies_files2: Cryptolocker indicators detected (100 or more files are modified)
T1486 modifies_files: Cryptolocker indicators detected (renamed 100 or more files)
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)
T1489 service_control_stop: Stops services via ControlService

Other

yara_rules: Static rules
suricata_alert: Malicious traffic detected
ce_info: Lockbit, BlackMatter Configuration Data found
blackmatter: Detected ransomware BlackMatter
multiple_useragents: Uses more than one unique User-Agent
cryptolocker_wallpaper: Ransomware indicators detected (changes the desktop wallpaper file)
create_rpc_bindings: Creates RPC connection
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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