Analysis

  • max time kernel
    54s
  • max time network
    34s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-08-2024 17:32

General

  • Target

    rBlbqI2.exe

  • Size

    291KB

  • MD5

    2fec9bf50de5395f799b23a1099b10d6

  • SHA1

    6000969e75d7d7a3fa1b908bdb9d5daeb5f2534e

  • SHA256

    df049efbfa7ac0b76c8daff5d792c550c7a7a24f6e9e887d01a01013c9caa763

  • SHA512

    5f6885fb1940ee4f84507e2b7929f637d8f264a5c77329aeae31803b772608ea93370177017f90f6f8d8bc9e0b30eb8607ed120d4ead68104fd70feec71a9ab8

  • SSDEEP

    6144:pdSK04ETTZ+4TBpvjLCnVlBpevKBauJirVuD05VSKJ:poL4EnU4T/vjLeVlayRihuA5D

Malware Config

Signatures

  • Jigsaw Ransomware

    Ransomware family first created in 2016. Named based on wallpaper set after infection in the early versions.

  • Renames multiple (466) 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.

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe
    "C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5020
    • C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
      "C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe" C:\Users\Admin\AppData\Local\Temp\rBlbqI2.exe
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:1180

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe

    Filesize

    291KB

    MD5

    2fec9bf50de5395f799b23a1099b10d6

    SHA1

    6000969e75d7d7a3fa1b908bdb9d5daeb5f2534e

    SHA256

    df049efbfa7ac0b76c8daff5d792c550c7a7a24f6e9e887d01a01013c9caa763

    SHA512

    5f6885fb1940ee4f84507e2b7929f637d8f264a5c77329aeae31803b772608ea93370177017f90f6f8d8bc9e0b30eb8607ed120d4ead68104fd70feec71a9ab8

  • memory/1180-607-0x0000000075240000-0x00000000757F1000-memory.dmp

    Filesize

    5.7MB

  • memory/1180-344-0x0000000075240000-0x00000000757F1000-memory.dmp

    Filesize

    5.7MB

  • memory/1180-343-0x0000000075240000-0x00000000757F1000-memory.dmp

    Filesize

    5.7MB

  • memory/1180-340-0x0000000075240000-0x00000000757F1000-memory.dmp

    Filesize

    5.7MB

  • memory/1180-342-0x0000000075240000-0x00000000757F1000-memory.dmp

    Filesize

    5.7MB

  • memory/1180-341-0x0000000075240000-0x00000000757F1000-memory.dmp

    Filesize

    5.7MB

  • memory/1180-339-0x0000000075240000-0x00000000757F1000-memory.dmp

    Filesize

    5.7MB

  • memory/1180-338-0x0000000075240000-0x00000000757F1000-memory.dmp

    Filesize

    5.7MB

  • memory/5020-69-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-51-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-71-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-0-0x0000000075242000-0x0000000075243000-memory.dmp

    Filesize

    4KB

  • memory/5020-68-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-65-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-63-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-62-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-60-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-8-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-264-0x0000000075240000-0x00000000757F1000-memory.dmp

    Filesize

    5.7MB

  • memory/5020-9-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-11-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-58-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-13-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-7-0x0000000075240000-0x00000000757F1000-memory.dmp

    Filesize

    5.7MB

  • memory/5020-6-0x0000000075240000-0x00000000757F1000-memory.dmp

    Filesize

    5.7MB

  • memory/5020-55-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-53-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-49-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-47-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-43-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-41-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-39-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-37-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-35-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-33-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-31-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-29-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-27-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-25-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-45-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-23-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-21-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-19-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-17-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-15-0x0000000005180000-0x00000000051B4000-memory.dmp

    Filesize

    208KB

  • memory/5020-5-0x0000000075240000-0x00000000757F1000-memory.dmp

    Filesize

    5.7MB

  • memory/5020-2-0x0000000075240000-0x00000000757F1000-memory.dmp

    Filesize

    5.7MB

  • memory/5020-1-0x0000000075240000-0x00000000757F1000-memory.dmp

    Filesize

    5.7MB