Analysis

  • max time kernel
    93s
  • max time network
    95s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-12-2024 23:39

General

  • Target

    4fc9500405b88fd85f73ad7c28aaef1f3db4f4f022d4d00fddc7bfc82a34e6b6N.exe

  • Size

    520KB

  • MD5

    353a0b3789b3b0001ba7736e2f3b7c70

  • SHA1

    84d1dc9b46611f1766cf104d6adfd4130fe423de

  • SHA256

    4fc9500405b88fd85f73ad7c28aaef1f3db4f4f022d4d00fddc7bfc82a34e6b6

  • SHA512

    1a24e3276519905971e8a8d7a02a48858772b4cca5f3cae96b62ad2e3cc8a3b7657f5bb9fe367bc868dba7b8dd860e1b6ae1924795ed20b9ea0894169a55a8ba

  • SSDEEP

    3072:zr8WDrCNeFgma30T7yw9Inoe7HOjg4Sk5ksw2jUK:PuN0gma30T7yIbeajg4lkswgUK

Malware Config

Signatures

  • 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 2 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 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4fc9500405b88fd85f73ad7c28aaef1f3db4f4f022d4d00fddc7bfc82a34e6b6N.exe
    "C:\Users\Admin\AppData\Local\Temp\4fc9500405b88fd85f73ad7c28aaef1f3db4f4f022d4d00fddc7bfc82a34e6b6N.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:5088
    • C:\Users\Admin\AppData\Local\Temp\3582-490\4fc9500405b88fd85f73ad7c28aaef1f3db4f4f022d4d00fddc7bfc82a34e6b6N.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\4fc9500405b88fd85f73ad7c28aaef1f3db4f4f022d4d00fddc7bfc82a34e6b6N.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:972

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\PROGRA~2\Adobe\ACROBA~1\Reader\AcroRd32.exe

    Filesize

    2.4MB

    MD5

    d9e8a1fa55faebd36ed2342fedefbedd

    SHA1

    c25cc7f0035488de9c5df0121a09b5100e1c28e9

    SHA256

    bd7696911d75a9a35dfd125b24cb95003f1e9598592df47fa23a2568986a4a9a

    SHA512

    134644c68bd04536e9ea0a5da6e334d36b1ce8012a061fa6dabd31f85c16a1ac9eee8c40fee3d55f25c4d4edf0672de8ce204e344c800361cbcff092c09d7a33

  • C:\Users\Admin\AppData\Local\Temp\3582-490\4fc9500405b88fd85f73ad7c28aaef1f3db4f4f022d4d00fddc7bfc82a34e6b6N.exe

    Filesize

    480KB

    MD5

    9ca8ab12078543ee4631faab229a35d4

    SHA1

    49d97aa7b43900c3ce4bc5766298b0255e464300

    SHA256

    d94dc4764c323ca9cfe0e2fd6bf032dad96a22eaef2627f5f4538b9bd47403fb

    SHA512

    293f49bf3053c60515ef1bfc6a1498b4a9984e2152f6d299274984dc1b0d3cd38efcb16aebb9cfddd3e816eaa0bc1dd47259113f5bb3dae30247d5cc932b8efc

  • memory/5088-96-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/5088-97-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/5088-99-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB