Resubmissions

21-02-2024 14:33

240221-rw8hmsha2y 10

21-02-2024 14:31

240221-rvtm4agh7w 10

21-02-2024 11:52

240221-n1xedseg6t 10

Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240215-en
  • resource tags

    arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
  • submitted
    21-02-2024 14:31

General

  • Target

    cerber.exe

  • Size

    604KB

  • MD5

    8b6bc16fd137c09a08b02bbe1bb7d670

  • SHA1

    c69a0f6c6f809c01db92ca658fcf1b643391a2b7

  • SHA256

    e67834d1e8b38ec5864cfa101b140aeaba8f1900a6e269e6a94c90fcbfe56678

  • SHA512

    b53d2cc0fe5fa52262ace9f6e6ea3f5ce84935009822a3394bfe49c4d15dfeaa96bfe10ce77ffa93dbf81e5428122aa739a94bc709f203bc346597004fd75a24

  • SSDEEP

    6144:yYghlI5/u8f1mr+4RJ99MpDa52RX5wRDhOOU0qsR:yYKlYmDXEpDHRXP01

Malware Config

Extracted

Path

C:\Users\Admin\Desktop\_R_E_A_D___T_H_I_S___ZOK1_.txt

Family

cerber

Ransom Note
CERBER RANSOMWARE ----- YOUR DOCUMENTS, PH0TOS, DATABASES AND OTHER IMPORTANT FILES HAVE BEEN ENCRYPTED! ----- The only way to decrypt y0ur 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 (*_READ_THIS_FILE_*) with complete instructions how to decrypt your files. If you cannot find any (*_READ_THIS_FILE_*) 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://p27dokhpz2n7nvgr.onion/821A-B9E1-D844-0446-9DBB 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://p27dokhpz2n7nvgr.12hygy.top/821A-B9E1-D844-0446-9DBB 2. http://p27dokhpz2n7nvgr.14ewqv.top/821A-B9E1-D844-0446-9DBB 3. http://p27dokhpz2n7nvgr.14vvrc.top/821A-B9E1-D844-0446-9DBB 4. http://p27dokhpz2n7nvgr.129p1t.top/821A-B9E1-D844-0446-9DBB 5. http://p27dokhpz2n7nvgr.1apgrn.top/821A-B9E1-D844-0446-9DBB ----- Note! These are temporary addresses! They will be available for a limited amount of time! -----
URLs

http://p27dokhpz2n7nvgr.onion/821A-B9E1-D844-0446-9DBB

http://p27dokhpz2n7nvgr.12hygy.top/821A-B9E1-D844-0446-9DBB

http://p27dokhpz2n7nvgr.14ewqv.top/821A-B9E1-D844-0446-9DBB

http://p27dokhpz2n7nvgr.14vvrc.top/821A-B9E1-D844-0446-9DBB

http://p27dokhpz2n7nvgr.129p1t.top/821A-B9E1-D844-0446-9DBB

http://p27dokhpz2n7nvgr.1apgrn.top/821A-B9E1-D844-0446-9DBB

Signatures

  • Cerber

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

  • Contacts a large (1089) amount of remote hosts 1 TTPs

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

  • Modifies Windows Firewall 2 TTPs 2 IoCs
  • Deletes itself 1 IoCs
  • Drops file in System32 directory 38 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • 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
  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cerber.exe
    "C:\Users\Admin\AppData\Local\Temp\cerber.exe"
    1⤵
    • Drops file in System32 directory
    • Sets desktop wallpaper using registry
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of UnmapMainImage
    • Suspicious use of WriteProcessMemory
    PID:3056
    • C:\Windows\SysWOW64\netsh.exe
      C:\Windows\system32\netsh.exe advfirewall set allprofiles state on
      2⤵
      • Modifies Windows Firewall
      PID:2300
    • C:\Windows\SysWOW64\netsh.exe
      C:\Windows\system32\netsh.exe advfirewall reset
      2⤵
      • Modifies Windows Firewall
      PID:2152
    • C:\Windows\SysWOW64\mshta.exe
      "C:\Windows\SysWOW64\mshta.exe" "C:\Users\Admin\Desktop\_R_E_A_D___T_H_I_S___2T7QY8_.hta"
      2⤵
      • Modifies Internet Explorer settings
      PID:2700
    • C:\Windows\SysWOW64\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\_R_E_A_D___T_H_I_S___ZOK1_.txt
      2⤵
      • Opens file in notepad (likely ransom note)
      PID:2688
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe"
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1944
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /f /im "cerber.exe"
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:2940
      • C:\Windows\SysWOW64\PING.EXE
        ping -n 1 127.0.0.1
        3⤵
        • Runs ping.exe
        PID:1916

Network

MITRE ATT&CK Matrix ATT&CK v13

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

2
T1112

Discovery

Network Service Discovery

1
T1046

System Information Discovery

1
T1082

Remote System Discovery

1
T1018

Impact

Defacement

1
T1491

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\Desktop\_R_E_A_D___T_H_I_S___2T7QY8_.hta
    Filesize

    75KB

    MD5

    cc101e647f9d4bde1d29b4da037b3dd4

    SHA1

    f576ca6e4bb98f8c728acaa2a80c5927650b3d3a

    SHA256

    a7fae0bfc9ab7706caec270d924e8ca02a84b3c2637f09f61bfb65c332380bdc

    SHA512

    d2eb384fa04007517b0b7f0fbee4cf31ff29d36fca515fd40627284a47b8ca531e8845b6101893f547bc5c2c4730aabb288c763de529d789825b96f86cbcadbe

  • C:\Users\Admin\Desktop\_R_E_A_D___T_H_I_S___ZOK1_.txt
    Filesize

    1KB

    MD5

    88cb9d10aac30a56d9864dc225886d6a

    SHA1

    cf460a1e7df51db0c5d49f8a7eee8a57f8f8250a

    SHA256

    d2daf13ca8948bf3110d35fa2d5a00c026f87642d7ffa54d1a099707568bff92

    SHA512

    42ba64e3b1294d3cb10ab998649a75460d6ad7b3d37bddfe5300e208d6551aa32b5abd6055adf3ae3146cbf4631ac6152b7fb4b7ce72577ada02adfb38a3893b

  • memory/3056-0-0x0000000000220000-0x0000000000251000-memory.dmp
    Filesize

    196KB

  • memory/3056-1-0x0000000000400000-0x0000000000435000-memory.dmp
    Filesize

    212KB

  • memory/3056-2-0x0000000000400000-0x0000000000435000-memory.dmp
    Filesize

    212KB

  • memory/3056-5-0x0000000000400000-0x0000000000435000-memory.dmp
    Filesize

    212KB

  • memory/3056-9-0x0000000000400000-0x0000000000435000-memory.dmp
    Filesize

    212KB

  • memory/3056-13-0x0000000000400000-0x0000000000435000-memory.dmp
    Filesize

    212KB

  • memory/3056-81-0x0000000000400000-0x0000000000435000-memory.dmp
    Filesize

    212KB

  • memory/3056-122-0x0000000000400000-0x0000000000435000-memory.dmp
    Filesize

    212KB