Analysis

  • max time kernel
    146s
  • max time network
    164s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30-01-2024 05:44

General

  • Target

    95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe

  • Size

    5.3MB

  • MD5

    79b6d4f066d1875b18de19ad54177fa7

  • SHA1

    d99188afd625268875b1050bd561a72c51d51d38

  • SHA256

    95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c

  • SHA512

    365ac763dfd0986ad06acfc6b5d6a1c124ec8816d5a5ddc05f4145a91bb6fd50b7e97b4fa3d309adfe4995f57375583c619d919ecdcc1b3c792cdef9e6414cd6

  • SSDEEP

    49152:CGUKMViI+OozP3w5C49ckglrOugdutUeUCyLQrO/LH:IK0iI+HPA

Malware Config

Signatures

  • Jigsaw Ransomware

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

  • Renames multiple (244) files with added filename extension

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

  • UPX dump on OEP (original entry point) 6 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • UPX packed file 6 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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).

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe
    "C:\Users\Admin\AppData\Local\Temp\95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4292
    • C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe
      "C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe" C:\Users\Admin\AppData\Local\Temp\95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      PID:4336

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    5.3MB

    MD5

    79b6d4f066d1875b18de19ad54177fa7

    SHA1

    d99188afd625268875b1050bd561a72c51d51d38

    SHA256

    95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c

    SHA512

    365ac763dfd0986ad06acfc6b5d6a1c124ec8816d5a5ddc05f4145a91bb6fd50b7e97b4fa3d309adfe4995f57375583c619d919ecdcc1b3c792cdef9e6414cd6

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

    Filesize

    4.0MB

    MD5

    b32f0e8fed8a89c1250f5e548c27aaa7

    SHA1

    8f6c091ebf41b757f9503895b607b46f9c7eb87d

    SHA256

    d78c903bc4cf0c9a1a0280feeb4b16c0deb57382d2195307fcb48c21e052ff32

    SHA512

    b45c86e08d4fed14c2b87c95d2c2890457a90d101158ebcfdd903ca1426b73bfb125e951c52373dd40b29d66d578add0657335b5b93cc79e7a3c3b8b65f94baa

  • memory/4292-51-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-8-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-2-0x00000000748B0000-0x0000000074E61000-memory.dmp

    Filesize

    5.7MB

  • memory/4292-3-0x00000000025B0000-0x00000000025C0000-memory.dmp

    Filesize

    64KB

  • memory/4292-4-0x00000000025B0000-0x00000000025C0000-memory.dmp

    Filesize

    64KB

  • memory/4292-7-0x00000000025B0000-0x00000000025C0000-memory.dmp

    Filesize

    64KB

  • memory/4292-9-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-55-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-11-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-13-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-15-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-17-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-19-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-21-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-23-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-25-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-27-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-29-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-31-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-33-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-35-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-37-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-39-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-41-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-43-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-45-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-47-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-49-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-0-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/4292-53-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-59-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-57-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-1-0x00000000748B0000-0x0000000074E61000-memory.dmp

    Filesize

    5.7MB

  • memory/4292-61-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-63-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-65-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-67-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-69-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-71-0x00000000051A0000-0x00000000051D4000-memory.dmp

    Filesize

    208KB

  • memory/4292-166-0x0000000005240000-0x0000000005241000-memory.dmp

    Filesize

    4KB

  • memory/4292-170-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/4292-171-0x00000000748B0000-0x0000000074E61000-memory.dmp

    Filesize

    5.7MB

  • memory/4292-183-0x00000000025B0000-0x00000000025C0000-memory.dmp

    Filesize

    64KB

  • memory/4292-189-0x00000000025B0000-0x00000000025C0000-memory.dmp

    Filesize

    64KB

  • memory/4292-199-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/4292-202-0x00000000748B0000-0x0000000074E61000-memory.dmp

    Filesize

    5.7MB

  • memory/4336-194-0x0000000002540000-0x0000000002550000-memory.dmp

    Filesize

    64KB

  • memory/4336-356-0x00000000748B0000-0x0000000074E61000-memory.dmp

    Filesize

    5.7MB

  • memory/4336-187-0x0000000002540000-0x0000000002550000-memory.dmp

    Filesize

    64KB

  • memory/4336-354-0x0000000002540000-0x0000000002550000-memory.dmp

    Filesize

    64KB

  • memory/4336-192-0x00000000748B0000-0x0000000074E61000-memory.dmp

    Filesize

    5.7MB

  • memory/4336-184-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/4336-186-0x00000000748B0000-0x0000000074E61000-memory.dmp

    Filesize

    5.7MB

  • memory/4336-188-0x0000000002540000-0x0000000002550000-memory.dmp

    Filesize

    64KB

  • memory/4336-353-0x0000000004F70000-0x0000000004F71000-memory.dmp

    Filesize

    4KB

  • memory/4336-379-0x0000000002540000-0x0000000002550000-memory.dmp

    Filesize

    64KB

  • memory/4336-380-0x0000000002540000-0x0000000002550000-memory.dmp

    Filesize

    64KB

  • memory/4336-381-0x0000000002540000-0x0000000002550000-memory.dmp

    Filesize

    64KB

  • memory/4336-382-0x00000000748B0000-0x0000000074E61000-memory.dmp

    Filesize

    5.7MB

  • memory/4336-383-0x0000000002540000-0x0000000002550000-memory.dmp

    Filesize

    64KB

  • memory/4336-385-0x0000000002540000-0x0000000002550000-memory.dmp

    Filesize

    64KB