Analysis

  • max time kernel
    91s
  • max time network
    94s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-12-2024 23:13

General

  • Target

    b2f3f2f41bc570044ef62331b30645a87cbb636da192d670fdd2c0e96e5bf5d6N.exe

  • Size

    669KB

  • MD5

    3c8039d07dd040b9b204d31f3e356730

  • SHA1

    3da0c4bfc00e90a26447fa7550b7aa9b14eeabe9

  • SHA256

    b2f3f2f41bc570044ef62331b30645a87cbb636da192d670fdd2c0e96e5bf5d6

  • SHA512

    efe2378608932af5448c49a11b9cad003514d1a55e0eb4b4f51d8087c410f795690cfe3d65bd30fefba329797110129c61961b77157bdf589ef6e48efc256635

  • SSDEEP

    6144:k9OMeK33nG5OfBRtCi7sRftMgBUSfIU5yWV1RobpMwUhS3Qzr:u4uWy26Qz

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 2 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 3 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 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b2f3f2f41bc570044ef62331b30645a87cbb636da192d670fdd2c0e96e5bf5d6N.exe
    "C:\Users\Admin\AppData\Local\Temp\b2f3f2f41bc570044ef62331b30645a87cbb636da192d670fdd2c0e96e5bf5d6N.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:1656
    • C:\Users\Admin\AppData\Local\Temp\3582-490\b2f3f2f41bc570044ef62331b30645a87cbb636da192d670fdd2c0e96e5bf5d6N.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\b2f3f2f41bc570044ef62331b30645a87cbb636da192d670fdd2c0e96e5bf5d6N.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3656
      • C:\Users\Admin\AppData\Local\Temp\~nsu.tmp\Au_.exe
        "C:\Users\Admin\AppData\Local\Temp\~nsu.tmp\Au_.exe" _?=C:\Users\Admin\AppData\Local\Temp\3582-490\
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:4492

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\b2f3f2f41bc570044ef62331b30645a87cbb636da192d670fdd2c0e96e5bf5d6N.exe

    Filesize

    629KB

    MD5

    28eefa51ac6d66df48c11387430a8fe6

    SHA1

    e61f7bbcdb193b7790b71a1b469b1b1dd801fbf1

    SHA256

    c69377a4b6d79dc16fdf9eee72c12d6d9865acf6bf87c56355a7b6d35e337b74

    SHA512

    5ce8484a060c1727c6854f09b959beb769a659b0edd1e8b32e021a6af9b20d7cba7002509b4b1d64fe483b49734b021063aa2eacd87969658f2e2a742e67b10f

  • memory/1656-102-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/1656-103-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/1656-105-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB