Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    01-05-2024 08:44

General

  • Target

    GandCrab.exe

  • Size

    183KB

  • MD5

    07fadb006486953439ce0092651fd7a6

  • SHA1

    e42431d37561cc695de03b85e8e99c9e31321742

  • SHA256

    d77378dcc42b912e514d3bd4466cdda050dda9b57799a6c97f70e8489dd8c8d0

  • SHA512

    5b09a07371bb5350b22c78aa3e7e673ba61ce72a964e072749a4633e2c15f416c05953cc6e6f6c586df010aa7f2c9c0ab87a014e4f732e5fdb2d58778a1fb437

  • SSDEEP

    3072:Ealy19emgKe0QuYS3UmWuDTEltI3S/7IarDrjCgrQp0M7W:EaqxxDwx/7IS40MS

Malware Config

Signatures

  • Gandcrab

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

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (312) files with added filename extension

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

  • Reads user/profile data of web browsers 2 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 40 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 13 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 43 IoCs
  • Suspicious use of WriteProcessMemory 4 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\GandCrab.exe
    "C:\Users\Admin\AppData\Local\Temp\GandCrab.exe"
    1⤵
    • Enumerates connected drives
    • Sets desktop wallpaper using registry
    • Drops file in Program Files directory
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2240
    • C:\Windows\SysWOW64\wbem\wmic.exe
      "C:\Windows\system32\wbem\wmic.exe" shadowcopy delete
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2852
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2252

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

    Filesize

    68KB

    MD5

    29f65ba8e88c063813cc50a4ea544e93

    SHA1

    05a7040d5c127e68c25d81cc51271ffb8bef3568

    SHA256

    1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

    SHA512

    e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357

    Filesize

    1KB

    MD5

    a266bb7dcc38a562631361bbf61dd11b

    SHA1

    3b1efd3a66ea28b16697394703a72ca340a05bd5

    SHA256

    df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e

    SHA512

    0da8ef4f8f6ed3d16d2bc8eb816b9e6e1345dfe2d91160196c47e6149a1d6aedaafadcefd66acdea7f72dcf0832770192ceac15b0c559c4ccc2c0e5581d5aefc

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    304B

    MD5

    dfbcf75883b20bb9301e2c90e6609204

    SHA1

    0fcb4140b7e25dd149bbeb2d4cfa698f09127626

    SHA256

    587eeccf677e80fd19a4f44ae3103c46e797794649768e2096a343016be1c694

    SHA512

    423e1a579df7efb50219e1bd0305ad77ffd3bf3ee3d4f51a58c171344efd78951cad98a0bec9c580f65e6433d88b377d54ae7f5707ea2994961e444d9a730856

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    304B

    MD5

    273cedb3e16b0960e0dcfdd490df5ac5

    SHA1

    78c950d5fa21c9fb935e5fd373fdbdfced82fcc5

    SHA256

    06e98bb7518a23b6d3968c1d028f9c7d1c56e83cb315952942d03e5b9993eba6

    SHA512

    a9178d5e73bfbeef08a8d980aeb146e7b50fb4122762b36c0a3e7fb71fd61f0817786338fca74fb4c36c6d2e8b6674b76d90371d35ec4da0d3259a6be3ab20e5

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357

    Filesize

    242B

    MD5

    ac285a5fd284526369e5cd680282ff6b

    SHA1

    48e65b03e47e19724e06a422dbb6848f4aa365a0

    SHA256

    4819fd081a797a2f311de47586db9615063bfce9abfd99e73a5c225ea862e4c9

    SHA512

    ef521f04b87d41768ad842b432525747877cc1bd03ddc671cd4d43d6d127b8593890070a73a0aca9abb2481aee2669466d3e2104cf8c257581a66076cadcc053

  • C:\Users\Admin\AppData\Local\Temp\Tar1A5B.tmp

    Filesize

    177KB

    MD5

    435a9ac180383f9fa094131b173a2f7b

    SHA1

    76944ea657a9db94f9a4bef38f88c46ed4166983

    SHA256

    67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

    SHA512

    1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

  • F:\$RECYCLE.BIN\S-1-5-21-3452737119-3959686427-228443150-1000\OLZQD-DECRYPT.html

    Filesize

    64KB

    MD5

    4005a3f031f469455c04ba17a611c682

    SHA1

    e4500dde71dac777c769b1214c992cbc0a276b5a

    SHA256

    cee37d3f5b6f4ea7b379e25803962db6a149bc7882d7246ac7be19e10bc18036

    SHA512

    d17cf5da20018fe32af08a94306ab7e191d27f76e1f5e6d92f16bf3d9b0ad2901a42f24eaca607b0bcecf3d555a6b7309880c5d6e384aed040d0ac4705a7eafc