Analysis

  • max time kernel
    50s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    24-05-2022 01:23

General

  • Target

    eb78d59cc372f65a13acff914d45d6f38d532405d338facc48dae2f24fb791ef.exe

  • Size

    273KB

  • MD5

    c388e87f1e4f31ec55f155749df1854f

  • SHA1

    6ebe5db1c8751686cd85a90d919b73ea5f246c89

  • SHA256

    eb78d59cc372f65a13acff914d45d6f38d532405d338facc48dae2f24fb791ef

  • SHA512

    2ecbe1ad25aa245d579e4f765ab85187b11e4dad19af6fef8781811a6944398bccaea3fad738c73b541f94873cd09e3d233366155e049c0d32e95ebf3d3facdf

Malware Config

Signatures

  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops file in Program Files directory 14 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\eb78d59cc372f65a13acff914d45d6f38d532405d338facc48dae2f24fb791ef.exe
    "C:\Users\Admin\AppData\Local\Temp\eb78d59cc372f65a13acff914d45d6f38d532405d338facc48dae2f24fb791ef.exe"
    1⤵
    • Modifies system executable filetype association
    • Checks computer location settings
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:3288
    • C:\Users\Admin\AppData\Local\Temp\3582-490\eb78d59cc372f65a13acff914d45d6f38d532405d338facc48dae2f24fb791ef.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\eb78d59cc372f65a13acff914d45d6f38d532405d338facc48dae2f24fb791ef.exe"
      2⤵
      • Executes dropped EXE
      PID:2424
      • C:\Windows\system32\WerFault.exe
        C:\Windows\system32\WerFault.exe -u -p 2424 -s 972
        3⤵
        • Program crash
        PID:3552
  • C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -pss -s 452 -p 2424 -ip 2424
    1⤵
      PID:4480

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\3582-490\eb78d59cc372f65a13acff914d45d6f38d532405d338facc48dae2f24fb791ef.exe

      Filesize

      233KB

      MD5

      a8fee8f535c073bec67a9e240e0efef7

      SHA1

      d26467643ab9f26da1b2d58e6757a1deedc7765e

      SHA256

      583112111ec2038d31bd2fc1a6a1f2b77e9ca0306fbf957fffcfe491e082fb90

      SHA512

      c9e95d8abc8ce334abebc8f087361c9fcd58e9fe6c832a551f252b32f8948dd630d6c54b3e45cc19573171ac71b2b032df3ac71388392789846cce57d411223c

    • C:\Users\Admin\AppData\Local\Temp\3582-490\eb78d59cc372f65a13acff914d45d6f38d532405d338facc48dae2f24fb791ef.exe

      Filesize

      233KB

      MD5

      a8fee8f535c073bec67a9e240e0efef7

      SHA1

      d26467643ab9f26da1b2d58e6757a1deedc7765e

      SHA256

      583112111ec2038d31bd2fc1a6a1f2b77e9ca0306fbf957fffcfe491e082fb90

      SHA512

      c9e95d8abc8ce334abebc8f087361c9fcd58e9fe6c832a551f252b32f8948dd630d6c54b3e45cc19573171ac71b2b032df3ac71388392789846cce57d411223c

    • memory/2424-130-0x0000000000000000-mapping.dmp

    • memory/2424-133-0x000001C488CF0000-0x000001C488D30000-memory.dmp

      Filesize

      256KB

    • memory/2424-134-0x00007FF94E510000-0x00007FF94EFD1000-memory.dmp

      Filesize

      10.8MB