Overview

overview

10

Static

static

3

221231-xf4gmsac98.exe

windows7-x64

10

221231-xf4gmsac98.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-03-2024 09:50

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General

  • Target

    221231-xf4gmsac98.exe

  • Size

    268KB

  • MD5

    d3fdd9807a32f5c27c14879336762119

  • SHA1

    73132972d130adb7106e6b9319b21856434eff65

  • SHA256

    fc184274ad3908021e4c8ef28f35dc77447ed6457375d2a4e7b411955e042527

  • SHA512

    87468ab4136f449cab6e3689b4460de6dc59421ad20ce8208e251b3e4ef63f4ac281288ec51a35469e2473328de8b45b487cd72f40ba72d304a44b89a99a7a80

  • SSDEEP

    6144:IXJ6Mv/PMB5lZOx4ccuiA8HYVVo7bBPxwdNaLvo:KJf/kBrZOxfwAsYVVoZZwdNaE

Score
10/10
cerberdiscoveryevasionransomware

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Microsoft\OneNote\16.0\cache\_R_E_A_D___T_H_I_S___03J98GQ_.txt

Family

cerber

Ransom Note
Hi, I'am CRBR ENCRYPTOR ;) ----- YOUR DOCUMENTS, PHOTOS, DATABASES AND OTHER IMPORTANT FILES HAVE BEEN ENCRYPTED! ----- The only way to decrypt your files is to receive the private key and decryption program. To receive the private key and decryption program go to any decrypted folder, inside there is the special file (*_R_E_A_D___T_H_I_S_*) with complete instructions how to decrypt your files. If you cannot find any (*_R_E_A_D___T_H_I_S_*) file at your PC, follow the instructions below: ----- 1. Download "Tor Browser" from https://www.torproject.org/ and install it. 2. In the "Tor Browser" open your personal page here: http://xpcx6erilkjced3j.onion/0FA4-E7E5-AB6A-005C-9DF0 Note! This page is available via "Tor Browser" only. ----- Also you can use temporary addresses on your personal page without using "Tor Browser". ----- 1. http://xpcx6erilkjced3j.1t2jhk.top/0FA4-E7E5-AB6A-005C-9DF0 2. http://xpcx6erilkjced3j.1e6ly3.top/0FA4-E7E5-AB6A-005C-9DF0 3. http://xpcx6erilkjced3j.1ewuh5.top/0FA4-E7E5-AB6A-005C-9DF0 4. http://xpcx6erilkjced3j.15ezkm.top/0FA4-E7E5-AB6A-005C-9DF0 5. http://xpcx6erilkjced3j.16umxg.top/0FA4-E7E5-AB6A-005C-9DF0 ----- Note! These are temporary addresses! They will be available for a limited amount of time! -----
URLs

http://xpcx6erilkjced3j.onion/0FA4-E7E5-AB6A-005C-9DF0

http://xpcx6erilkjced3j.1t2jhk.top/0FA4-E7E5-AB6A-005C-9DF0

http://xpcx6erilkjced3j.1e6ly3.top/0FA4-E7E5-AB6A-005C-9DF0

http://xpcx6erilkjced3j.1ewuh5.top/0FA4-E7E5-AB6A-005C-9DF0

http://xpcx6erilkjced3j.15ezkm.top/0FA4-E7E5-AB6A-005C-9DF0

http://xpcx6erilkjced3j.16umxg.top/0FA4-E7E5-AB6A-005C-9DF0

Signatures

  • Cerber

    Cerber is a widely used ransomware-as-a-service (RaaS), first seen in 2017.

    ransomwarecerber
  • Contacts a large (1106) amount of remote hosts 1 TTPs

    This may indicate a network scan to discover remotely running services.

    discovery
  • Modifies Windows Firewall 2 TTPs 2 IoCs
    evasion
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 1 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

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

  • Drops file in System32 directory 38 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
    ransomware
  • Drops file in Program Files directory 20 IoCs
  • Drops file in Windows directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
    evasion
  • Modifies registry class 1 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
    ransomware
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\221231-xf4gmsac98.exe
    "C:\Users\Admin\AppData\Local\Temp\221231-xf4gmsac98.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Enumerates connected drives
    • Drops file in System32 directory
    • Sets desktop wallpaper using registry
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4624
    • C:\Windows\SysWOW64\netsh.exe
      C:\Windows\system32\netsh.exe advfirewall set allprofiles state on
      2⤵
      • Modifies Windows Firewall
      PID:2512
    • C:\Windows\SysWOW64\netsh.exe
      C:\Windows\system32\netsh.exe advfirewall reset
      2⤵
      • Modifies Windows Firewall
      PID:4188
    • C:\Windows\SysWOW64\mshta.exe
      "C:\Windows\SysWOW64\mshta.exe" "C:\Users\Admin\Desktop\_R_E_A_D___T_H_I_S___HEI4VU_.hta" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}
      2⤵
        PID:4984
      • C:\Windows\SysWOW64\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\_R_E_A_D___T_H_I_S___HASCFFQ_.txt
        2⤵
        • Opens file in notepad (likely ransom note)
        PID:696
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /d /c taskkill /f /im "221231-xf4gmsac98.exe" > NUL & ping -n 1 127.0.0.1 > NUL & del "C:\Users\Admin\AppData\Local\Temp\221231-xf4gmsac98.exe" > NUL && exit
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3268
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /f /im "221231-xf4gmsac98.exe"
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:1112
        • C:\Windows\SysWOW64\PING.EXE
          ping -n 1 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:1636

    Network

    MITRE ATT&CK Matrix ATT&CK v13

    Initial Access

    Execution

    Persistence

    Create or Modify System Process

    1
    T1543

    Windows Service

    1
    T1543.003

    Privilege Escalation

    Create or Modify System Process

    1
    T1543

    Windows Service

    1
    T1543.003

    Defense Evasion

    Impair Defenses

    1
    T1562

    Disable or Modify System Firewall

    1
    T1562.004

    Modify Registry

    1
    T1112

    Credential Access

    Discovery

    Network Service Discovery

    1
    T1046

    Query Registry

    2
    T1012

    System Information Discovery

    3
    T1082

    Peripheral Device Discovery

    1
    T1120

    Remote System Discovery

    1
    T1018

    Lateral Movement

    Collection

    Exfiltration

    Command and Control

    Impact

    Defacement

    1
    T1491

    Resource Development

    Reconnaissance

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\OneNote\16.0\cache\_R_E_A_D___T_H_I_S___03J98GQ_.txt
      Filesize

      1KB

      MD5

      0f6747a0bf029e6ba71aefc2f96ddb3e

      SHA1

      8f718d452612e27ea28b8d4baaca3720daf75777

      SHA256

      59e7953ba9b74f1896de8cf46cf5683c73b8fc866e431869de0fe33e787610c6

      SHA512

      1fc32e6d80cb2346d45b0d241026ea7c977a708f2e95d6027f08611a1df5ce94174c353b5e7f4714500f1ea778d9241c0bbd6cf3e1bc15dce75d7139dd3aef0e

      Download Submit
    • C:\Users\Admin\AppData\Local\Microsoft\OneNote\16.0\cache\_R_E_A_D___T_H_I_S___2JS0RQ3H_.hta
      Filesize

      76KB

      MD5

      d28594ce9ef29f2d1b8000f96b5809ed

      SHA1

      529ac0a074d625edb89983b5fb49c9c4db8c5b4a

      SHA256

      78aa8cf7c8070b8a6aa64929393c8e9aec0be7c245afc71e00a52bcf7d42ec25

      SHA512

      4cc1a576d07d15b64ffd642bd413a1785551224d72388198ca816bb1202a3f26da1d050aaa83bcaad4dccf02295e28124722633bb21b124aca27b22ae8a70130

      Download Submit
    • memory/4624-0-0x00000000021A0000-0x00000000021CE000-memory.dmp
      Filesize

      184KB

      Download
    • memory/4624-1-0x0000000000400000-0x0000000000431000-memory.dmp
      Filesize

      196KB

      Download
    • memory/4624-2-0x0000000000400000-0x0000000000431000-memory.dmp
      Filesize

      196KB

      Download
    • memory/4624-6-0x0000000000400000-0x0000000000431000-memory.dmp
      Filesize

      196KB

      Download
    • memory/4624-13-0x0000000000400000-0x0000000000431000-memory.dmp
      Filesize

      196KB

      Download
    • memory/4624-18-0x0000000000400000-0x0000000000431000-memory.dmp
      Filesize

      196KB

      Download
    • memory/4624-24-0x0000000000400000-0x0000000000431000-memory.dmp
      Filesize

      196KB

      Download
    • memory/4624-43-0x0000000000400000-0x0000000000431000-memory.dmp
      Filesize

      196KB

      Download
    • memory/4624-382-0x0000000000400000-0x0000000000431000-memory.dmp
      Filesize

      196KB

      Download
    • memory/4624-404-0x0000000000400000-0x0000000000431000-memory.dmp
      Filesize

      196KB

      Download