Overview

overview

10

Static

static

3

3ac7f91e37...38.exe

windows7-x64

10

3ac7f91e37...38.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    109s
  • max time network
    113s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-03-2024 13:43

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General

  • Target

    3ac7f91e37572c0d15de4de96ab4719531c30536409fda4acb3e0071ab726338.exe

  • Size

    390KB

  • MD5

    08109df08fa4a035c59d56d1e6c5baf4

  • SHA1

    bec86bce6f6963d0cc69c441c6d5fb6d04d3a833

  • SHA256

    3ac7f91e37572c0d15de4de96ab4719531c30536409fda4acb3e0071ab726338

  • SHA512

    61e6cc3e94ddb7a980bfb0a2e5e5ffeeb5414c9e2ef3e42551820017dbedab5cccdd8ece1fed2ca057e240bdb7836663a7f9be28f1bb9136da972750caf59704

  • SSDEEP

    12288:s8TC7FeAA9IsQwycG888888888888W88888888888E7xCYsdG:s8TygVinw1Z7xCZdG

Score
10/10
cerberdiscoveryevasionransomware

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Roaming\Microsoft\OneNote\16.0\_R_E_A_D___T_H_I_S___C5R2Y_.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/6509-D5BF-6070-0098-91D2 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.19kxwa.top/6509-D5BF-6070-0098-91D2 2. http://xpcx6erilkjced3j.1eht65.top/6509-D5BF-6070-0098-91D2 3. http://xpcx6erilkjced3j.1t2jhk.top/6509-D5BF-6070-0098-91D2 4. http://xpcx6erilkjced3j.1e6ly3.top/6509-D5BF-6070-0098-91D2 5. http://xpcx6erilkjced3j.16umxg.top/6509-D5BF-6070-0098-91D2 ----- Note! These are temporary addresses! They will be available for a limited amount of time! -----
URLs

http://xpcx6erilkjced3j.onion/6509-D5BF-6070-0098-91D2

http://xpcx6erilkjced3j.19kxwa.top/6509-D5BF-6070-0098-91D2

http://xpcx6erilkjced3j.1eht65.top/6509-D5BF-6070-0098-91D2

http://xpcx6erilkjced3j.1t2jhk.top/6509-D5BF-6070-0098-91D2

http://xpcx6erilkjced3j.1e6ly3.top/6509-D5BF-6070-0098-91D2

http://xpcx6erilkjced3j.16umxg.top/6509-D5BF-6070-0098-91D2

Signatures

  • Cerber

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

    ransomwarecerber
  • Contacts a large (1104) 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\3ac7f91e37572c0d15de4de96ab4719531c30536409fda4acb3e0071ab726338.exe
    "C:\Users\Admin\AppData\Local\Temp\3ac7f91e37572c0d15de4de96ab4719531c30536409fda4acb3e0071ab726338.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:4124
    • C:\Windows\SysWOW64\netsh.exe
      C:\Windows\system32\netsh.exe advfirewall set allprofiles state on
      2⤵
      • Modifies Windows Firewall
      PID:964
    • C:\Windows\SysWOW64\netsh.exe
      C:\Windows\system32\netsh.exe advfirewall reset
      2⤵
      • Modifies Windows Firewall
      PID:2320
    • C:\Windows\SysWOW64\mshta.exe
      "C:\Windows\SysWOW64\mshta.exe" "C:\Users\Admin\Desktop\_R_E_A_D___T_H_I_S___5Q4581T_.hta" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}
      2⤵
        PID:2372
      • C:\Windows\SysWOW64\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\_R_E_A_D___T_H_I_S___K5AL9_.txt
        2⤵
        • Opens file in notepad (likely ransom note)
        PID:1752
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /d /c taskkill /f /im "3ac7f91e37572c0d15de4de96ab4719531c30536409fda4acb3e0071ab726338.exe" > NUL & ping -n 1 127.0.0.1 > NUL & del "C:\Users\Admin\AppData\Local\Temp\3ac7f91e37572c0d15de4de96ab4719531c30536409fda4acb3e0071ab726338.exe" > NUL && exit
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4324
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /f /im "3ac7f91e37572c0d15de4de96ab4719531c30536409fda4acb3e0071ab726338.exe"
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:4340
        • C:\Windows\SysWOW64\PING.EXE
          ping -n 1 127.0.0.1
          3⤵
          • Runs ping.exe
          PID:2604

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Roaming\Microsoft\OneNote\16.0\_R_E_A_D___T_H_I_S___C5R2Y_.txt
      Filesize

      1KB

      MD5

      34f37248a56e1c78ec0d80cc5d8b4433

      SHA1

      60d197cac90ad114602f3cf3839d0d0a97e528a5

      SHA256

      bddc739ba837d4b8b366aefcb42ec2242e1e4177e4481cad760fdd9d6e59069b

      SHA512

      932f7044e0604aa371b620cf90d92d3836e218eda68b8afe5df2623f121cc5fb310ac1f8312399b6718f5e583aad86b900050cb386a85a0e7b201aa12bd71078

      Download Submit

    • C:\Users\Admin\AppData\Roaming\Microsoft\OneNote\16.0\_R_E_A_D___T_H_I_S___H6FABQP_.hta
      Filesize

      76KB

      MD5

      15bf55566c36a9f5f0aa96f04efc9652

      SHA1

      42e166f6ee615e889ad267b3ce09802160dea0c2

      SHA256

      ceebbeeb4750e878c0416dca58f650e5e9b166ab67e678929fd53a80d47385cd

      SHA512

      cfa4436dae1154d8da95ad83657eda00416e9d31fa4c7fc2d283e8b9ba3db8e6b3f1cbb84ffb0bdec22e7ed22bfab2f0a020256f3d45a5022eb6a5fa5fe4d87d

      Download Submit

    • memory/4124-0-0x0000000001500000-0x0000000001532000-memory.dmp

      Filesize

      200KB

      Download

    • memory/4124-1-0x0000000000400000-0x0000000000436000-memory.dmp

      Filesize

      216KB

      Download

    • memory/4124-2-0x0000000000400000-0x0000000000436000-memory.dmp

      Filesize

      216KB

      Download

    • memory/4124-6-0x0000000000400000-0x0000000000436000-memory.dmp

      Filesize

      216KB

      Download

    • memory/4124-357-0x0000000000400000-0x0000000000436000-memory.dmp

      Filesize

      216KB

      Download

    • memory/4124-382-0x0000000000400000-0x0000000000436000-memory.dmp

      Filesize

      216KB

      Download