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Analysis

  • max time kernel
    425s
  • max time network
    433s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20250113-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20250113-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    16-01-2025 12:52

General

  • Target

    Malware-1-master/crb.exe

  • Size

    139KB

  • MD5

    24275604649ac0abafe99b981b914fbc

  • SHA1

    818b0e3018ad27be9887e9e5f4ef1971f422652c

  • SHA256

    4b5fe7497864d07f78af15fa3e1aa3702b303b89f9644624871d83dd0f484749

  • SHA512

    008ef045724963d6ae3b845a6c3de8ebb6682b0f4b8ea77c2d35e2193596b78f0092183de0a88a34f7dde4e71abbc129b2f0f00fd8469801fff66f1b8390b6c8

  • SSDEEP

    1536:JLMVCWvZ8URtqOz3d+1Qs6H9Mk2e3E2avMWC3yMgYxf6+okbdWsWjcdpKCaIxWzX:VM9ntZ3s1QJdnU2SQdf64ZZ8CaIxWec

Malware Config

Extracted

Path

F:\$RECYCLE.BIN\S-1-5-21-3982764349-3037452555-3708423086-1000\BSNVNW-DECRYPT.txt

Ransom Note
---= GANDCRAB V5.0.4 =--- ***********************UNDER NO CIRCUMSTANCES DO NOT DELETE THIS FILE, UNTIL ALL YOUR DATA IS RECOVERED*********************** *****FAILING TO DO SO, WILL RESULT IN YOUR SYSTEM CORRUPTION, IF THERE ARE DECRYPTION ERRORS***** Attention! All your files, documents, photos, databases and other important files are encrypted and have the extension: .BSNVNW 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/155886aaacb6c796 | 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--- lAQAANjvVj/Pjg3aJRz5Gyxoz4FU6VD7+f2sq4tJXes4EtFNVi7B6Zbq3iAMzEL6tLkD6nzO6RJWzycXTUEkyI0uK1TsYyFqdHMFAlVDlOFx2R5McdlURHq5Y5HpMgNdCEirZeu5WwtmBYdqk8VwkH6OMbMHkhsEtL/biKqRQ5O5e77laXUZw8xsm+iFnY8LCjnpvVPO4bUsW2tc/+AUHO0QCKOuJVj0jr7fiHuxAvtzFPbr2no/kkUlaTXpZevmwAQ0NLWlCKBegyYOszwFx3Y5agGKTyd2v0BponJSlMcm5BIYyiWIqa1wQfzmt0welVmwaEzA7/mA6cQ96Mt/FFvPEBebf8qU6AYlsWTFrWQS8AiPAOAsBLkPR9DNdqV92T6URpaMiWpMr/dY8jFpv2YhJ9OVGkSbhWVJeoUUJEgpVRHcv+NWa2gCYne9aNc6ahESWDrV7X/YkqVIh80wgjbINz3U6seaR8/OfBxjchsICNMko5TjnnmfSGAR2bfClRIWJCovfEUr/pnRbpn8IkdLbxqy2i9NCPSOsCB36dmm1Gv92kfN46FAF9QXWcIIeaZq7nz4VTcOQy55+WG89Z9EMb75un+am6tcRediAjA/DT25DfelOoItHhCQBMwtnePnaKa0bqSRWO8lGX5O5svsmzUdX+6WTg6BDlzUHWSZVqyV6WfB4Q8G0CJA9S5lLNzcGVyBDQ7NBT2molqrWZY+zNUbysAVMptIGruQqBT7zAw4o/jiXugw4SB8cxRyHASAyspaKGlQEHnUFMQVTeaTMptsEhwW4oNzjFmvMZry8i2HKeVuMPooloxlPkdz0c+/2PaRUz/NBmOx0BtvWgdlCIXKH5eQUb1PbktVdHAUG0krmBa8JBstMBSQvYrolMQvQYNMVD//QN2Obot+uwiDBGdDuXvKxd88/2J0/ZZQuVW+ftvxrs/nDVs0aghmjAaxUE6nvuaTjuy0Aa1bdWdTvzQ1s5JwHtq5Uq2q9nIFU0Jbd+5j6Zw4a2OULUEnX0MauGubwKJXVT7RSLPix8FGd+NXY+J8CENSjWlCVVSkynF4IvYWTRTcDCPbP4ge54xuadx0B56hCH24wdT7iDNVE63hbt3AkTXBFwusREMRXp6eJENqGPymusbnWbv9z+cZ7wUoFHrPRO61L6OsfkA2G1M1EepqZ0vOJF0VoP0QvYrgsA5G6b23WzCBNkNZfwReQg/reYpXxlzbX5No1XDzlFks+lg+JJA2C22NcZrQc9/iv1E1N87XU00qJPu58x6dyPEofW6vvBOOpr8zhHZgOWgw6jd4iYZ6pmAtB/PwlYtzHHWLC2aZWshLRBIG1o1lQK4nz5hNe2v5l4T7qYwjG0pa2sx6yl8Ym4xvJKb0PMrLIXLijBZpbBIKq7HHG7QbGfJk0Qo1OqQJcrSeJJ0P59a/ahcRHye4fCXsLb7U2+woznrEZSkxDh66i19jnLunmqHjh3Adr9r27oBtaCx0qtObDGkFHwhwS7bJtvwSLJUtTqNvmj/c/S064+pc13ofcaPbhnm7znMWsAOdAfoOzEIApPxEozrfS2dOLnI1W/yFQLLrtWw3xEa32jRM0YTgoUiP5VceVuJzuVUsy3ZD9/w3vbZ2Xg55Am7GIsA9kYOZtSkr72Ddpg3e7DboYJh5yTkEQga4Y3OLbUwB/oQcgRzlW5tXgN6wDLPKC8up5HztmuB5KcjfsB04FzqAusA+KOiIWOicHwHI2YTLUDljCKv5YWhq277GPmdBWzYZOYg42eFe7aBHDpquIpALKGmyZ3VroQMuiV2GQO4jdKhJE4l1Lolh3o+Wlt9okbEjirmXwS5HGck25hsWFTfroi1VoGP9QijM8vaTMEWrrfHaJL1hs8XV0EcpK8PAH8HImtccBd0DaGZxNFIzyyrURlUJrNjUygqj1OISNFTS8N4ZBk2rZQ56y9rzEM/j/TnHGnOpCQ77BZQPVGH/MOqdPj0iKSwI3IrxUfXU6IlBWmwN+SxgZlAClgR/HDfAJxir970po1e+ddiotrcml02ZupsG7Ma/jMXl2hN453k7anzSOSyng0Fsrf/y2FhphxhyQkYM3tmxQDR8jLP29y08bQr8BiE2WMhGEClar1AMWRCeo44oWYjq4b2oHHZBwoW0wSwiLo7AEuzd3xxHHCzoZxPT++xQ7rXKLiRJ4kddlwAK0Q+86efoAB1wl9mvN+h0bzKK24bWxDnFO2IJBDV6/CSPKPt5vbA= ---END GANDCRAB KEY--- ---BEGIN PC DATA--- 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 ---END PC DATA---
URLs

http://gandcrabmfe6mnef.onion/155886aaacb6c796

Signatures

  • Gandcrab

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

  • Gandcrab family
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (285) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Credentials from Password Stores: Windows Credential Manager 1 TTPs

    Suspicious access to Credentials History.

  • Drops startup file 2 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Enumerates connected drives 3 TTPs 23 IoCs

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

  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Drops file in Program Files directory 25 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

  • Checks processor information in registry 2 TTPs 3 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 45 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Malware-1-master\crb.exe
    "C:\Users\Admin\AppData\Local\Temp\Malware-1-master\crb.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Enumerates connected drives
    • Sets desktop wallpaper using registry
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3720
    • C:\Windows\SysWOW64\wbem\wmic.exe
      "C:\Windows\system32\wbem\wmic.exe" shadowcopy delete
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2308
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout -c 5 & del "C:\Users\Admin\AppData\Local\Temp\Malware-1-master\crb.exe" /f /q
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:228
      • C:\Windows\SysWOW64\timeout.exe
        timeout -c 5
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:3088
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3612

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\3F45CFC395459D7C5D5E6E2DBAC3A186

    Filesize

    5B

    MD5

    5bfa51f3a417b98e7443eca90fc94703

    SHA1

    8c015d80b8a23f780bdd215dc842b0f5551f63bd

    SHA256

    bebe2853a3485d1c2e5c5be4249183e0ddaff9f87de71652371700a89d937128

    SHA512

    4cd03686254bb28754cbaa635ae1264723e2be80ce1dd0f78d1ab7aee72232f5b285f79e488e9c5c49ff343015bd07bb8433d6cee08ae3cea8c317303e3ac399

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\3F45CFC395459D7C5D5E6E2DBAC3A186

    Filesize

    414B

    MD5

    8b937a9dad81dc5e3ce9693e272a27f8

    SHA1

    65612f9040657a4e64176ec8ddcb6a19c0b22bc1

    SHA256

    a92630f60de5c78d48c25050ab643f1e66b6ae62dee63b2420063eeabfd14e71

    SHA512

    c60227daaaa519b06b8871169a4fdc64c31bc59d098e4b18709c883ac2a7aa2ac7a44a97e83b3a87d96df1694d49a7ddaecc450d1b3e4e0402c088a18991aac9

  • F:\$RECYCLE.BIN\S-1-5-21-3982764349-3037452555-3708423086-1000\BSNVNW-DECRYPT.txt

    Filesize

    8KB

    MD5

    6aef887deb7e59c74fe4198c5d8bb313

    SHA1

    5d38f4e1683e1cb22926a0bbea357f30d5a4aab4

    SHA256

    1ecf29eb4149c49590ccf06e5f112ea98b4c7e8be92c54ed86faff8e9802677e

    SHA512

    575a33bf0638199946099b97690ea7faecad3fe4adb5f0cbcebd6321ac7a528f51a3d8cfe0f0ac570ac974e8ac49ee77e15c4fe12218f1c8fc8941343ab2d5c7