Analysis

  • max time kernel
    133s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240419-en
  • resource tags

    arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
  • submitted
    01/05/2024, 10:14

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 (249) 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 31 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 9 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:1008
    • C:\Windows\SysWOW64\wbem\wmic.exe
      "C:\Windows\system32\wbem\wmic.exe" shadowcopy delete
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1228
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2800

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    344B

    MD5

    9a24328afa098c3b4b901f9d7111446c

    SHA1

    ec8c477fde548255ec4734ef748b9380ebfdd097

    SHA256

    ac78fe74acd82597f4407454566d74a597a329173b4a747d1dd1c74af5f91e87

    SHA512

    1d413ff62b160209caeb43b351dd749dfc6aa5e1fb10ca7cb966fcea71b7d0c0b0a3e95c4e7409c1115f712a6d30d1d751b928bab024fe6f0d1a0a6a906fcfd4

  • C:\Users\Admin\AppData\Local\Temp\Cab9F2.tmp

    Filesize

    68KB

    MD5

    29f65ba8e88c063813cc50a4ea544e93

    SHA1

    05a7040d5c127e68c25d81cc51271ffb8bef3568

    SHA256

    1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

    SHA512

    e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

  • C:\Users\Admin\AppData\Local\Temp\TarA33.tmp

    Filesize

    177KB

    MD5

    435a9ac180383f9fa094131b173a2f7b

    SHA1

    76944ea657a9db94f9a4bef38f88c46ed4166983

    SHA256

    67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

    SHA512

    1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

  • F:\$RECYCLE.BIN\S-1-5-21-481678230-3773327859-3495911762-1000\JZZGL-DECRYPT.html

    Filesize

    64KB

    MD5

    4ce46efc2ae9e6ab8b4fc9ca0fd29b08

    SHA1

    000c73153d9621b485e173f2d78cc21f1acfe42e

    SHA256

    e68663db2f7709610e7780997685829654447a638d8261c61c16e685fee8d16f

    SHA512

    d1855970be86d86f059e277d021f413aeb50ede0037b2b9ac5063d8d6d58de39d2d71b162928a2010d453648bda6a1e69a25a3d82e246a946ed158cc1650745b