Resubmissions

01-12-2021 15:31

211201-sx6k4sddbp 10

20-08-2021 08:25

210820-cnfpwecy2s 7

Analysis

  • max time kernel
    119s
  • max time network
    124s
  • platform
    windows10_x64
  • resource
    win10-en-20211104
  • submitted
    01-12-2021 15:31

General

  • Target

    cf60d0d6b05bfe2e51ca9dac01a4ae506b90d78d8d9d0fc266e3c01d8d2ba6b7.exe

  • Size

    1.3MB

  • MD5

    da3ab4d40944c077f92e52d2c1de8fca

  • SHA1

    6676ef8826b9e5419958761f3a71464105290288

  • SHA256

    cf60d0d6b05bfe2e51ca9dac01a4ae506b90d78d8d9d0fc266e3c01d8d2ba6b7

  • SHA512

    1dcc1259105c730fff76e518d7d57bce8cacacfebc05cf7b3294ccdbf8286635bfe43532f7a19507d3fd42973429f2c9335d031cbd473b356cba1bab79ce318a

Malware Config

Extracted

Path

C:\eeWDzMyD5.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 100 GB of 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. Blog post link: %BLOG_URL% >>> 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://supp24maprinktc7uizgfyqhisx7lkszb6ogh6lwdzpac23w3mh4tvyd.onion/8ZHJ2G2FJDX9JSHTA6S >> Warning! Recovery recommendations. We strongly recommend you to do not MODIFY or REPAIR your files, that will damage them.
URLs

http://supp24maprinktc7uizgfyqhisx7lkszb6ogh6lwdzpac23w3mh4tvyd.onion/8ZHJ2G2FJDX9JSHTA6S

Extracted

Family

blackmatter

Version

1.4

Botnet

caa0d21adc7bdc4dc424497512a8f37d

C2

https://paymenthacks.com

http://paymenthacks.com

https://mojobiden.com

http://mojobiden.com

Attributes
  • attempt_auth

    false

  • create_mutex

    true

  • encrypt_network_shares

    true

  • exfiltrate

    true

  • mount_volumes

    true

rsa_pubkey.base64
aes.base64

Signatures

  • BlackMatter Ransomware

    BlackMatter ransomware group claims to be Darkside and REvil succesor.

  • suricata: ET MALWARE BlackMatter CnC Activity

    suricata: ET MALWARE BlackMatter CnC Activity

  • 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 (paymenthacks .com)

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

  • Modifies extensions of user files 18 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Loads dropped DLL 1 IoCs
  • Enumerates connected drives 3 TTPs 1 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
  • Suspicious use of SetThreadContext 1 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 21 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 17 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cf60d0d6b05bfe2e51ca9dac01a4ae506b90d78d8d9d0fc266e3c01d8d2ba6b7.exe
    "C:\Users\Admin\AppData\Local\Temp\cf60d0d6b05bfe2e51ca9dac01a4ae506b90d78d8d9d0fc266e3c01d8d2ba6b7.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:3772
    • C:\Users\Admin\AppData\Local\Temp\cf60d0d6b05bfe2e51ca9dac01a4ae506b90d78d8d9d0fc266e3c01d8d2ba6b7.exe
      "C:\Users\Admin\AppData\Local\Temp\cf60d0d6b05bfe2e51ca9dac01a4ae506b90d78d8d9d0fc266e3c01d8d2ba6b7.exe"
      2⤵
      • Modifies extensions of user files
      • Enumerates connected drives
      • Sets desktop wallpaper using registry
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Modifies Control Panel
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4080
      • C:\Windows\SysWOW64\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" /p C:\eeWDzMyD5.README.txt
        3⤵
        • Modifies registry class
        • Opens file in notepad (likely ransom note)
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2028
        • C:\Windows\splwow64.exe
          C:\Windows\splwow64.exe 12288
          4⤵
            PID:3460
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3936

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Defense Evasion

    Modify Registry

    1
    T1112

    Discovery

    Query Registry

    1
    T1012

    Peripheral Device Discovery

    1
    T1120

    System Information Discovery

    2
    T1082

    Impact

    Defacement

    1
    T1491

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\eeWDzMyD5.README.txt
      MD5

      6fa43061e83bcd017c53d4193f15a9de

      SHA1

      4967320d8646cdcdc9685ae51cb26bdbcc01eaa9

      SHA256

      7bd9ec7fb1b24ec085bf0f07a0453ad9fcb54ba8093a4fc62c3db3fddf20312e

      SHA512

      18be5472b3caca35ed41821397bede35cb050f0c5994126139c97c6093ce8e0c5cc9cc7da7f372a414205d3116ec9cf37b65a70a843adb743c0f7d92881f9d3e

    • \Users\Admin\AppData\Local\Temp\nswADF5.tmp\System.dll
      MD5

      fccff8cb7a1067e23fd2e2b63971a8e1

      SHA1

      30e2a9e137c1223a78a0f7b0bf96a1c361976d91

      SHA256

      6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e

      SHA512

      f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

    • memory/2028-123-0x0000000000000000-mapping.dmp
    • memory/3460-125-0x0000000000000000-mapping.dmp
    • memory/4080-119-0x000000000040EB61-mapping.dmp
    • memory/4080-120-0x0000000000400000-0x0000000000414000-memory.dmp
      Filesize

      80KB

    • memory/4080-121-0x0000000002023000-0x0000000002025000-memory.dmp
      Filesize

      8KB

    • memory/4080-122-0x0000000002020000-0x0000000002021000-memory.dmp
      Filesize

      4KB