Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-12-2024 22:28

General

  • Target

    5439b0c9f352e8cf756159a85cd5320a6354b5df2caeb310f0482ba7023e9e39.exe

  • Size

    1.0MB

  • MD5

    667a5267da6a6348ce1476418e0604ca

  • SHA1

    bd0456534f67a2f4c57bdcd4f7758badc4105341

  • SHA256

    5439b0c9f352e8cf756159a85cd5320a6354b5df2caeb310f0482ba7023e9e39

  • SHA512

    53e352853b78f420fab96c40714e7248fab84804b5ba24e11dd15e5841c942e0530bcd0a5205e06f4cf921ba6e200c1ad7218f01efc1969018a49cce3303b11b

  • SSDEEP

    24576:RrHQefNEhLjdpREeUdc8JqsXxSATrV9tX0cG+auic:RTQefih1EeUdZJqKSATDWvgic

Malware Config

Signatures

  • Detect Neshta payload 4 IoCs
  • Neshta

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

  • Neshta family
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Reads user/profile data of web browsers 3 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).

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

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

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\5439b0c9f352e8cf756159a85cd5320a6354b5df2caeb310f0482ba7023e9e39.exe
    "C:\Users\Admin\AppData\Local\Temp\5439b0c9f352e8cf756159a85cd5320a6354b5df2caeb310f0482ba7023e9e39.exe"
    1⤵
    • Checks computer location settings
    • Modifies system executable filetype association
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2128
    • C:\Users\Admin\AppData\Local\Temp\3582-490\5439b0c9f352e8cf756159a85cd5320a6354b5df2caeb310f0482ba7023e9e39.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\5439b0c9f352e8cf756159a85cd5320a6354b5df2caeb310f0482ba7023e9e39.exe"
      2⤵
      • Executes dropped EXE
      PID:4364

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROTE~1.EXE

    Filesize

    86KB

    MD5

    3b73078a714bf61d1c19ebc3afc0e454

    SHA1

    9abeabd74613a2f533e2244c9ee6f967188e4e7e

    SHA256

    ded54d1fcca07b6bff2bc3b9a1131eac29ff1f836e5d7a7c5c325ec5abe96e29

    SHA512

    75959d4e8a7649c3268b551a2a378e6d27c0bfb03d2422ebeeb67b0a3f78c079473214057518930f2d72773ce79b106fd2d78405e8e3d8883459dcbb49c163c4

  • C:\Users\Admin\AppData\Local\Temp\3582-490\5439b0c9f352e8cf756159a85cd5320a6354b5df2caeb310f0482ba7023e9e39.exe

    Filesize

    996KB

    MD5

    0b5587ab9ec608a09576960078de0e07

    SHA1

    098d6dcedf6007b2400c0c4ce449563378f32651

    SHA256

    ec5bcae788f08cbea0a82e48cee15e82b0cd3c0764f2206f543ccda04657f61f

    SHA512

    3bc662d2c8a099e2ab7599d4b3dd0029bdc057494f25d2b629dfc7abf5e2e8e76703a8de2e0caa174f8c4e68522bef0e0e47ec3190357a18de7a8b3c01c4f113

  • C:\Users\Admin\AppData\Local\WebEx\atinst.exe

    Filesize

    1.0MB

    MD5

    cc9431efaa03c2e2c9da373ff58b599c

    SHA1

    b1a86871f44624883bf3842e482fe9f518566abb

    SHA256

    8e1f12200aa5d6b117d98362912bacf9772293a809e7477b73b9a6b201936e7b

    SHA512

    50d74c6ac1e1209bdf70b7a5392064fa9749f618b33b5715eb8b78111311c0a076a7b4e31c28944a54280d6fd5c4a17b41d87392a024a34241d92e983ba7ee62

  • memory/2128-98-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/2128-99-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/2128-101-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB