Analysis

  • max time kernel
    91s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    23-05-2022 23:56

General

  • Target

    bb3217d01b9e6523c76e8436248cc2a324ef02fdde24b657c6f871d77b6dffde.exe

  • Size

    231KB

  • MD5

    bc8c8b7f8b8d53b737b4b1dc67fbde1d

  • SHA1

    6fe6fecc194ec5ceb7103fb35a74bb473606dcd0

  • SHA256

    bb3217d01b9e6523c76e8436248cc2a324ef02fdde24b657c6f871d77b6dffde

  • SHA512

    0d338306e000757d19562a7eb158b9fa750bc72b95dacee746c7fa6f571c4eaf6dc25689f51d4f3d442c518b06f75cc9640bbd1ae32565ddbae5691b14da3bbb

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 use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bb3217d01b9e6523c76e8436248cc2a324ef02fdde24b657c6f871d77b6dffde.exe
    "C:\Users\Admin\AppData\Local\Temp\bb3217d01b9e6523c76e8436248cc2a324ef02fdde24b657c6f871d77b6dffde.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:4656
    • C:\Users\Admin\AppData\Local\Temp\3582-490\bb3217d01b9e6523c76e8436248cc2a324ef02fdde24b657c6f871d77b6dffde.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\bb3217d01b9e6523c76e8436248cc2a324ef02fdde24b657c6f871d77b6dffde.exe"
      2⤵
      • Executes dropped EXE
      PID:1664
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1664 -s 888
        3⤵
        • Program crash
        PID:5084
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 180 -p 1664 -ip 1664
    1⤵
      PID:4372

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\3582-490\bb3217d01b9e6523c76e8436248cc2a324ef02fdde24b657c6f871d77b6dffde.exe

      Filesize

      190KB

      MD5

      4e86d49dfed8ce8b22902ee4ccfc9e42

      SHA1

      4002981830efa4dd6d31f84cc74fda2e570edc6f

      SHA256

      256f1d4ba320195215f4b0b8a9a7178ce5f00d967864e43595bb59b0e0adcb2c

      SHA512

      953c0e7d1a182dd86c4c8e3d855bc03f19f48b26e1f86f434a50acd5b837ee513ff80003ca2fb2055ba78feeb9c547912ae6e2fdfca224b35f110235275ce524

    • C:\Users\Admin\AppData\Local\Temp\3582-490\bb3217d01b9e6523c76e8436248cc2a324ef02fdde24b657c6f871d77b6dffde.exe

      Filesize

      190KB

      MD5

      4e86d49dfed8ce8b22902ee4ccfc9e42

      SHA1

      4002981830efa4dd6d31f84cc74fda2e570edc6f

      SHA256

      256f1d4ba320195215f4b0b8a9a7178ce5f00d967864e43595bb59b0e0adcb2c

      SHA512

      953c0e7d1a182dd86c4c8e3d855bc03f19f48b26e1f86f434a50acd5b837ee513ff80003ca2fb2055ba78feeb9c547912ae6e2fdfca224b35f110235275ce524

    • memory/1664-130-0x0000000000000000-mapping.dmp

    • memory/1664-133-0x0000000000CF0000-0x0000000000D26000-memory.dmp

      Filesize

      216KB