Overview

overview

10

Static

static

3

42.exe

windows7-x64

10

42.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    146s
  • max time network
    149s
  • 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 13:27

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General

  • Target

    42.exe

  • Size

    285KB

  • MD5

    20af51324fe5cadbeaedf2945ead21e8

  • SHA1

    3e24cc45468317f97e5491bfe89463c7933c1481

  • SHA256

    08136ea4cfafdb12d88a0a0dcb1dd05769dc329e6db100aac6c5502f16337925

  • SHA512

    cb1ece3e3c0d6cc1d6136ac1e783d851f1c34dbc7e5d752552ffa7b1a0d97056ca2de15ec7a4fce29ce67edcf7f8ddd6139fd43f15f93b14587768bc91bc2dbf

  • SSDEEP

    6144:nhj3y9UAgG0AmETEVJAHgStBRceZ6QO+YzoKZ:nLAgQsVJ0BRceZLO+YE

Score
10/10
cerberdiscoveryevasionpersistenceprivilege_escalationransomware

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Roaming\Microsoft\OneNote\16.0\_R_E_A_D___T_H_I_S___R53H_.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/AE45-2249-E019-009E-D66E 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/AE45-2249-E019-009E-D66E 2. http://qfjhpgbefuhenjp7.158ugp.top/AE45-2249-E019-009E-D66E 3. http://qfjhpgbefuhenjp7.1fcfjn.top/AE45-2249-E019-009E-D66E 4. http://qfjhpgbefuhenjp7.1225wj.top/AE45-2249-E019-009E-D66E 5. http://qfjhpgbefuhenjp7.1a2jzy.top/AE45-2249-E019-009E-D66E ----- Note! These are temporary addresses! They will be available for a limited amount of time! -----
URLs

http://qfjhpgbefuhenjp7.onion/AE45-2249-E019-009E-D66E

http://qfjhpgbefuhenjp7.13iuvw.top/AE45-2249-E019-009E-D66E

http://qfjhpgbefuhenjp7.158ugp.top/AE45-2249-E019-009E-D66E

http://qfjhpgbefuhenjp7.1fcfjn.top/AE45-2249-E019-009E-D66E

http://qfjhpgbefuhenjp7.1225wj.top/AE45-2249-E019-009E-D66E

http://qfjhpgbefuhenjp7.1a2jzy.top/AE45-2249-E019-009E-D66E

Signatures

  • Cerber

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

    ransomwarecerber
  • Contacts a large (1100) 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).

  • 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.

    persistenceprivilege_escalation
  • 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.

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

    Adversaries may check for Internet connectivity on compromised systems.

    discovery
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • 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\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:1220
    • 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:3488
    • 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:4376
    • C:\Windows\SysWOW64\mshta.exe
      "C:\Windows\SysWOW64\mshta.exe" "C:\Users\Admin\Desktop\_R_E_A_D___T_H_I_S___0OUWPZ_.hta" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4092
    • C:\Windows\SysWOW64\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\_R_E_A_D___T_H_I_S___NFFK8N_.txt
      2⤵
      • System Location Discovery: System Language Discovery
      • Opens file in notepad (likely ransom note)
      PID:4532
    • 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:4908
      • 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:928
      • 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:1672

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Privilege Escalation

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

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

Peripheral Device Discovery

1
T1120

Query Registry

3
T1012

Remote System Discovery

1
T1018

System Information Discovery

4
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

System Network Configuration Discovery

1
T1016

Internet Connection Discovery

1
T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

1
T1491

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Downloads

  • C:\Users\Admin\AppData\Roaming\Microsoft\OneNote\16.0\_R_E_A_D___T_H_I_S___B149SHMV_.hta
    Filesize

    76KB

    MD5

    8ab888fb9794dab8e449d2498823924c

    SHA1

    7e43478aaf560e74181dbe2407655c4e2fb61293

    SHA256

    7124afbab7e3ad3cd812f35a78c7941cdc83839eb52cc6af94aac32683ca0aef

    SHA512

    f0c0aa261020c143d5e5b31175768fd1688b97833651c326cdd5857c9a1f943de40e0c851a370ea37e201cd9654e4751c9498238b79558d6509afd712c7840d2

    Download Submit

  • C:\Users\Admin\AppData\Roaming\Microsoft\OneNote\16.0\_R_E_A_D___T_H_I_S___R53H_.txt
    Filesize

    1KB

    MD5

    8b5f7a8fc8bfda4a64db4c0965f50151

    SHA1

    8118877fd0b69eb212b309b0c668fb8a67b7b82b

    SHA256

    0cfeb7228b28f52dc3798ab181c79b8f20abb4314c443b191fb53665975e254e

    SHA512

    fd2af3d1b102e727b2d5345672d955e39289f66b4379073a857cc463f9f5c455b066e13deeb4ea1ebc9f67049eb58ebb594461ad96baea23dc8f09b489d08e1a

    Download Submit

  • memory/1220-0-0x0000000002440000-0x0000000002441000-memory.dmp

    Filesize

    4KB

    Download

  • memory/1220-1-0x0000000002240000-0x0000000002241000-memory.dmp

    Filesize

    4KB

    Download

  • memory/1220-2-0x0000000000400000-0x0000000000489000-memory.dmp

    Filesize

    548KB

    Download

  • memory/1220-3-0x0000000000400000-0x0000000000489000-memory.dmp

    Filesize

    548KB

    Download

  • memory/1220-4-0x0000000000400000-0x0000000000489000-memory.dmp

    Filesize

    548KB

    Download

  • memory/1220-5-0x0000000002440000-0x0000000002441000-memory.dmp

    Filesize

    4KB

    Download

  • memory/1220-6-0x0000000002240000-0x0000000002241000-memory.dmp

    Filesize

    4KB

    Download

  • memory/1220-7-0x0000000000400000-0x0000000000489000-memory.dmp

    Filesize

    548KB

    Download

  • memory/1220-403-0x0000000000400000-0x0000000000489000-memory.dmp

    Filesize

    548KB

    Download