Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-09-2024 08:35

General

  • Target

    42.exe

  • Size

    285KB

  • MD5

    20af51324fe5cadbeaedf2945ead21e8

  • SHA1

    3e24cc45468317f97e5491bfe89463c7933c1481

  • SHA256

    08136ea4cfafdb12d88a0a0dcb1dd05769dc329e6db100aac6c5502f16337925

  • SHA512

    cb1ece3e3c0d6cc1d6136ac1e783d851f1c34dbc7e5d752552ffa7b1a0d97056ca2de15ec7a4fce29ce67edcf7f8ddd6139fd43f15f93b14587768bc91bc2dbf

  • SSDEEP

    6144:nhj3y9UAgG0AmETEVJAHgStBRceZ6QO+YzoKZ:nLAgQsVJ0BRceZLO+YE

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Roaming\Microsoft\OneNote\16.0\_R_E_A_D___T_H_I_S___84VGF_.txt

Family

cerber

Ransom Note
Hi, I'am CRBR ENCRYPTOR ;) ----- ALL YOUR DOCUMENTS, PH0TOS, DATABASES AND 0THER IMPORTANT FILES HAVE BEEN ENCRYPTED! ----- The only one 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://qfjhpgbefuhenjp7.onion/0AD0-8B07-B19D-009E-D3AC 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://qfjhpgbefuhenjp7.13iuvw.top/0AD0-8B07-B19D-009E-D3AC 2. http://qfjhpgbefuhenjp7.158ugp.top/0AD0-8B07-B19D-009E-D3AC 3. http://qfjhpgbefuhenjp7.1fcfjn.top/0AD0-8B07-B19D-009E-D3AC 4. http://qfjhpgbefuhenjp7.1225wj.top/0AD0-8B07-B19D-009E-D3AC 5. http://qfjhpgbefuhenjp7.1a2jzy.top/0AD0-8B07-B19D-009E-D3AC ----- Note! These are temporary addresses! They will be available for a limited amount of time! -----
URLs

http://qfjhpgbefuhenjp7.onion/0AD0-8B07-B19D-009E-D3AC

http://qfjhpgbefuhenjp7.13iuvw.top/0AD0-8B07-B19D-009E-D3AC

http://qfjhpgbefuhenjp7.158ugp.top/0AD0-8B07-B19D-009E-D3AC

http://qfjhpgbefuhenjp7.1fcfjn.top/0AD0-8B07-B19D-009E-D3AC

http://qfjhpgbefuhenjp7.1225wj.top/0AD0-8B07-B19D-009E-D3AC

http://qfjhpgbefuhenjp7.1a2jzy.top/0AD0-8B07-B19D-009E-D3AC

Signatures

  • Cerber

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

  • Contacts a large (1099) amount of remote hosts 1 TTPs

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

  • Modifies Windows Firewall 2 TTPs 2 IoCs
  • 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
  • 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).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Modifies registry class 1 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • 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\42.exe
    "C:\Users\Admin\AppData\Local\Temp\42.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
    • System Location Discovery: System Language Discovery
    • Enumerates system info in registry
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2736
    • C:\Windows\SysWOW64\netsh.exe
      C:\Windows\system32\netsh.exe advfirewall set allprofiles state on
      2⤵
      • Modifies Windows Firewall
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:5084
    • C:\Windows\SysWOW64\netsh.exe
      C:\Windows\system32\netsh.exe advfirewall reset
      2⤵
      • Modifies Windows Firewall
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:3448
    • C:\Windows\SysWOW64\mshta.exe
      "C:\Windows\SysWOW64\mshta.exe" "C:\Users\Admin\Desktop\_R_E_A_D___T_H_I_S___FBI926_.hta" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4956
    • C:\Windows\SysWOW64\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\_R_E_A_D___T_H_I_S___XE8U2GR_.txt
      2⤵
      • System Location Discovery: System Language Discovery
      • Opens file in notepad (likely ransom note)
      PID:2892
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /d /c taskkill /f /im "4" > NUL & ping -n 1 127.0.0.1 > NUL & del "C" > NUL && exit
      2⤵
      • System Location Discovery: System Language Discovery
      • System Network Configuration Discovery: Internet Connection Discovery
      • Suspicious use of WriteProcessMemory
      PID:3460
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /f /im "4"
        3⤵
        • System Location Discovery: System Language Discovery
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:4032
      • C:\Windows\SysWOW64\PING.EXE
        ping -n 1 127.0.0.1
        3⤵
        • System Location Discovery: System Language Discovery
        • System Network Configuration Discovery: Internet Connection Discovery
        • Runs ping.exe
        PID:4600

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___84VGF_.txt

    Filesize

    1KB

    MD5

    e4b9b2a342aa24e40afeb77014b69e7a

    SHA1

    ca376c25bf107d1037e2013109045758830fcaf0

    SHA256

    a3850ae7004d098f0df5c5613d0e0d80e0356d1f8e72437ef5d96cf26e665c9b

    SHA512

    edb880cbd162fb8eb73bc14071a47d75bb51277b68373d2ff3b7e85b0ec22c6f97f9828eeec73e3139d732169146aa73ce925f686b2f400caf98817be1ab7019

  • C:\Users\Admin\AppData\Roaming\Microsoft\OneNote\16.0\_R_E_A_D___T_H_I_S___WX3Z5IZM_.hta

    Filesize

    76KB

    MD5

    fc99dfe53f5ceaf2f8d90ac152ded0bf

    SHA1

    0a31a21b4f60c3403f797f09eaf77bc56c3e9dce

    SHA256

    361b3e3fe9009b5609bd93b63a72cb9792b3c5d76bb2b7cbf6be6e53e6d7365e

    SHA512

    6f534619c9e73fde90e3a0d2e95e2654bfc88bd0066ae208497c4dc0e3cc01f3eb550216b4c9be520323f526c237a6341fbc3b10c3a6cf4566644ae77fa9334e

  • memory/2736-0-0x00000000022E0000-0x00000000022E1000-memory.dmp

    Filesize

    4KB

  • memory/2736-1-0x0000000000540000-0x0000000000541000-memory.dmp

    Filesize

    4KB

  • memory/2736-2-0x0000000000400000-0x0000000000489000-memory.dmp

    Filesize

    548KB

  • memory/2736-3-0x0000000000400000-0x0000000000489000-memory.dmp

    Filesize

    548KB

  • memory/2736-4-0x0000000000400000-0x0000000000489000-memory.dmp

    Filesize

    548KB

  • memory/2736-5-0x00000000022E0000-0x00000000022E1000-memory.dmp

    Filesize

    4KB

  • memory/2736-6-0x0000000000540000-0x0000000000541000-memory.dmp

    Filesize

    4KB

  • memory/2736-7-0x0000000000400000-0x0000000000489000-memory.dmp

    Filesize

    548KB

  • memory/2736-413-0x0000000000400000-0x0000000000489000-memory.dmp

    Filesize

    548KB