Analysis

  • max time kernel
    158s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-en-20211104
  • submitted
    22-11-2021 13:14

General

  • Target

    3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe

  • Size

    79KB

  • MD5

    35aaa2a2208956d1b8752954722ff76d

  • SHA1

    fccda267f03d8dcd815f662f0fdc1e18e9fd4be3

  • SHA256

    3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40

  • SHA512

    25cca12fd228932402aa4ee3f88f1d1db45ff8167aa4a260ecc1d1911f500c239a9d0465547974abfa3ed6f330a4654932df0fa820b8bcd9c9acfb99ccbcb1e3

Malware Config

Extracted

Path

C:\gawreXkrr.README.txt

Family

blackmatter

Ransom Note
~+ * + ' BLACK | () .-.,='``'=. - o - '=/_ \ | * | '=._ | \ `=./`, ' . '=.__.=' `=' * + Matter + O * ' . >>> What happens? Your network is encrypted, and currently not operational. We need only money, after payment we will give you a decryptor for the entire network and you will restore all the data. >>> What data stolen? From your network was stolen sensitive data. If you do not contact us we will publish all your data in our blog and will send it to the biggest mass media. >>> What guarantees? We are not a politically motivated group and we do not need anything other than your money. If you pay, we will provide you the programs for decryption and we will delete your data. If we do not give you decrypters or we do not delete your data, no one will pay us in the future, this does not comply with our goals. We always keep our promises. >> How to contact with us? 1. Download and install TOR Browser (https://www.torproject.org/). 2. Open http://supp24yy6a66hwszu2piygicgwzdtbwftb76htfj7vnip3getgqnzxid.onion/D4MX4VGFCMO7MFQ6P >> Warning! Recovery recommendations. We strongly recommend you to do not MODIFY or REPAIR your files, that will damage them.
URLs

http://supp24yy6a66hwszu2piygicgwzdtbwftb76htfj7vnip3getgqnzxid.onion/D4MX4VGFCMO7MFQ6P

Signatures

  • BlackMatter Ransomware

    BlackMatter ransomware group claims to be Darkside and REvil succesor.

  • suricata: ET MALWARE BlackMatter CnC Domain in DNS Lookup (mojobiden .com)

    suricata: ET MALWARE BlackMatter CnC Domain in DNS Lookup (mojobiden .com)

  • suricata: ET MALWARE BlackMatter CnC Domain in DNS Lookup (nowautomation .com)

    suricata: ET MALWARE BlackMatter CnC Domain in DNS Lookup (nowautomation .com)

  • Modifies extensions of user files 13 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Modifies Control Panel 3 IoCs
  • Modifies registry class 20 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 17 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe
    "C:\Users\Admin\AppData\Local\Temp\3a4bd5288b89aa26fbe39353b93c1205efa671be4f96e50beae0965f45fdcc40.exe"
    1⤵
    • Modifies extensions of user files
    • Sets desktop wallpaper using registry
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Modifies Control Panel
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:580
    • C:\Windows\SysWOW64\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" /p C:\gawreXkrr.README.txt
      2⤵
      • Opens file in notepad (likely ransom note)
      • Suspicious use of WriteProcessMemory
      PID:1668
      • C:\Windows\splwow64.exe
        C:\Windows\splwow64.exe 12288
        3⤵
        • Modifies registry class
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of SetWindowsHookEx
        PID:1392
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1864

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Modify Registry

1
T1112

Discovery

System Information Discovery

1
T1082

Impact

Defacement

1
T1491

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\gawreXkrr.README.txt
    MD5

    5fc34d51147df5696554dd7cca4febaa

    SHA1

    cc58005940434a64e8c1f18a1a645a09869abeb4

    SHA256

    a811e4d76dc3a6014a3a41a6692a09ce82a0f28276df1b9252b87894a69e3fce

    SHA512

    1a50b466e43259b2f7faf5a472759a8a355609186bd1227dcf64309a3e9eab7d258c0d8931d4c283156a61558b678c1563a6ea05dfe489f75316b1b3c7e9da23

  • memory/580-55-0x0000000075A01000-0x0000000075A03000-memory.dmp
    Filesize

    8KB

  • memory/580-56-0x0000000001E35000-0x0000000001E46000-memory.dmp
    Filesize

    68KB

  • memory/580-57-0x0000000001E30000-0x0000000001E31000-memory.dmp
    Filesize

    4KB

  • memory/580-58-0x0000000001E46000-0x0000000001E47000-memory.dmp
    Filesize

    4KB

  • memory/1392-62-0x0000000000000000-mapping.dmp
  • memory/1392-63-0x000007FEFBF21000-0x000007FEFBF23000-memory.dmp
    Filesize

    8KB

  • memory/1392-64-0x00000000041E0000-0x00000000041E1000-memory.dmp
    Filesize

    4KB

  • memory/1668-59-0x0000000000000000-mapping.dmp