Analysis

  • max time kernel
    93s
  • max time network
    136s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    13-06-2022 09:18

General

  • Target

    89a332fd5581babca990f18a2d51d0da.exe

  • Size

    939KB

  • MD5

    89a332fd5581babca990f18a2d51d0da

  • SHA1

    0a8e53e9046ed6da95e455117f49c49b546a0c2c

  • SHA256

    a70171a1bc2a7fba0f4dcc65d2f0458f4e08388fcea7fe880c26341dcaaed413

  • SHA512

    a96bee9ee61d230c19737418f5390e7724e4520c53aca179be4f3cb212ede4c63e27f7143242a62b7bac64b63030c8708bcf1e16ce4df8cdbd126f0b1aec2a05

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.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops file in Program Files directory 64 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 behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\89a332fd5581babca990f18a2d51d0da.exe
    "C:\Users\Admin\AppData\Local\Temp\89a332fd5581babca990f18a2d51d0da.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:4216
    • C:\Users\Admin\AppData\Local\Temp\3582-490\89a332fd5581babca990f18a2d51d0da.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\89a332fd5581babca990f18a2d51d0da.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3576
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 3576 -s 804
        3⤵
        • Program crash
        PID:5028
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3576 -ip 3576
    1⤵
      PID:892

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Change Default File Association

    1
    T1042

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Credentials in Files

    1
    T1081

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    2
    T1082

    Collection

    Data from Local System

    1
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\3582-490\89a332fd5581babca990f18a2d51d0da.exe
      Filesize

      899KB

      MD5

      e167ddc32938561b2a9e63c181a815ae

      SHA1

      b651f3786f0bf09d4aac4003e4d261f0dcd44072

      SHA256

      b907e3d83695ba1ac9894b33985c2a4b28eeca3b8b89eefce876222c771a3ca7

      SHA512

      ae3d3ea44ae69f7b2c3a62d08905c6ed4350acd7097c9df6bd586318262938626e6d1b085ec0491f56216fedb088f3ac6217a70853951560316209c2196bc33e

    • C:\Users\Admin\AppData\Local\Temp\3582-490\89a332fd5581babca990f18a2d51d0da.exe
      Filesize

      899KB

      MD5

      e167ddc32938561b2a9e63c181a815ae

      SHA1

      b651f3786f0bf09d4aac4003e4d261f0dcd44072

      SHA256

      b907e3d83695ba1ac9894b33985c2a4b28eeca3b8b89eefce876222c771a3ca7

      SHA512

      ae3d3ea44ae69f7b2c3a62d08905c6ed4350acd7097c9df6bd586318262938626e6d1b085ec0491f56216fedb088f3ac6217a70853951560316209c2196bc33e

    • memory/3576-130-0x0000000000000000-mapping.dmp
    • memory/3576-133-0x0000000000F70000-0x000000000105A000-memory.dmp
      Filesize

      936KB