Overview

overview

10

Static

static

4091865e27...8e.exe

windows7_x64

10

4091865e27...8e.exe

windows10_x64

10

Analysis

  • max time kernel
    145s
  • max time network
    153s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    16-06-2021 14:38

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General

  • Target

    4091865e279525545484caf09f8f9930dd9afb7397fa5d694b51531b5527688e.exe

  • Size

    194KB

  • MD5

    c1b8bea674020ad71f3e68734231e3ef

  • SHA1

    8239ff8c3248dd084653560e448857b6428f4e7e

  • SHA256

    4091865e279525545484caf09f8f9930dd9afb7397fa5d694b51531b5527688e

  • SHA512

    3ad4ca3d51b0491eef483e5f16ca3f6205cb81d793430e6f368aee0c967e28299ea19bac3732b6ff03f3dbffe3e2a5eb9cd525d7dd5fe64dbd5fd6d4d9cb3e4d

Score
10/10
gandcrabbackdoorransomwarespywarestealer

Malware Config

Extracted

Path

C:\KRAB-DECRYPT.txt

Ransom Note
---= GANDCRAB V4 =--- Attention! All your files, documents, photos, databases and other important files are encrypted and have the extension: .KRAB The only method of recovering files is to purchase an unique private key. Only we can give you this key and only we can recover your files. The server with your key is in a closed network TOR. You can get there by the following ways: ---------------------------------------------------------------------------------------- | 0. Download Tor browser - https://www.torproject.org/ | 1. Install Tor browser | 2. Open Tor Browser | 3. Open link in TOR browser: http://gandcrabmfe6mnef.onion/fe4944ecf52cb1a | 4. Follow the instructions on this page ---------------------------------------------------------------------------------------- On our page you will see instructions on payment and get the opportunity to decrypt 1 file for free. ATTENTION! IN ORDER TO PREVENT DATA DAMAGE: * DO NOT MODIFY ENCRYPTED FILES * DO NOT CHANGE DATA BELOW ---BEGIN GANDCRAB KEY--- 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 ---END GANDCRAB KEY--- ---BEGIN PC DATA--- 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 ---END PC DATA---
URLs

http://gandcrabmfe6mnef.onion/fe4944ecf52cb1a

Signatures

  • GandCrab Payload 1 IoCs
  • Gandcrab

    Gandcrab is a Trojan horse that encrypts files on a computer.

    ransomwarebackdoorgandcrab
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Modifies extensions of user files 4 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Drops startup file 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Enumerates connected drives 3 TTPs 24 IoCs

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

  • Drops file in Program Files directory 41 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies system certificate store 2 TTPs 4 IoCs
    evasionspywaretrojan
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 45 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4091865e279525545484caf09f8f9930dd9afb7397fa5d694b51531b5527688e.exe
    "C:\Users\Admin\AppData\Local\Temp\4091865e279525545484caf09f8f9930dd9afb7397fa5d694b51531b5527688e.exe"
    1⤵
    • Modifies extensions of user files
    • Drops startup file
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:852
    • C:\Windows\SysWOW64\wbem\wmic.exe
      "C:\Windows\system32\wbem\wmic.exe" shadowcopy delete
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:900
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4020

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File Deletion

1
T1107

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

2
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

3
T1082

Lateral Movement

Collection

Data from Local System

1
T1005

Exfiltration

Command and Control

Impact

Inhibit System Recovery

1
T1490

Replay Monitor

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Downloads

  • memory/852-114-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

    Download
  • memory/900-115-0x0000000000000000-mapping.dmp
    Download