Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/10/2024, 08:49

General

  • Target

    541eb776bdc2f8689f7d36d7321860cd2b96a76a5e0b4597466355e92fb52403N.exe

  • Size

    455KB

  • MD5

    ef1865f411ee6d335a598b5986b12060

  • SHA1

    17bc37bbd07cd4629dfe63d357c3f355f11d5da5

  • SHA256

    541eb776bdc2f8689f7d36d7321860cd2b96a76a5e0b4597466355e92fb52403

  • SHA512

    fdfa9efb2651aae9ddc9e8feca8239b9fc90ac248c04edd03a45f756668b5c17fb38ea662bb14414d8860b65ba77ae7b5409abe8db7418f0ea0a9086e893e785

  • SSDEEP

    6144:k9Em6g3oBxSPWMSRaR9bYLw5gQMwv2rn3:lmRaSaRiNSQMwv83

Malware Config

Signatures

  • Detect Neshta payload 7 IoCs
  • Neshta

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

  • Neshta family
  • Downloads MZ/PE file
  • 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\541eb776bdc2f8689f7d36d7321860cd2b96a76a5e0b4597466355e92fb52403N.exe
    "C:\Users\Admin\AppData\Local\Temp\541eb776bdc2f8689f7d36d7321860cd2b96a76a5e0b4597466355e92fb52403N.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:1540
    • C:\Users\Admin\AppData\Local\Temp\3582-490\541eb776bdc2f8689f7d36d7321860cd2b96a76a5e0b4597466355e92fb52403N.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\541eb776bdc2f8689f7d36d7321860cd2b96a76a5e0b4597466355e92fb52403N.exe"
      2⤵
      • Executes dropped EXE
      PID:1892

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\541eb776bdc2f8689f7d36d7321860cd2b96a76a5e0b4597466355e92fb52403N.exe

    Filesize

    415KB

    MD5

    c3464f9a7fec5d9c856ebec5947be8eb

    SHA1

    a372523f4ca1a4d1f4c8c7d8efccf4ffa42c06ee

    SHA256

    455d345e65b3994acbd921e318c91c968bdb2344d259b472dbd16a95787d8388

    SHA512

    cce63ac446a67a6977aee9a48c4552b6caf274c925f10541072618aa6505a18d172799b15e5b5eaf0ba89c685230ab7ad7e1a18aff4aa08cba0e5f913b5e2a9c

  • C:\Users\Admin\AppData\Roaming\Zoom\ZOOMDO~1\INSTAL~1.EXE

    Filesize

    1.1MB

    MD5

    8f1db445e7cef2fa7e87f2ada6e277ad

    SHA1

    b1d66a8feab97d57180c35cf98f42c9e5a9c99a9

    SHA256

    8c700bcd07ac08a6445b4b80c8a6e2d556c2df4f5541024d18cf52b5bef30d40

    SHA512

    5501ab97a3819f5568a8d7a0dceef0e5715dbb1a2d95b8a81119af35f707258be1f9de3c77dad57c48b4ad723715146c74351452d3ac212a4152e94f6026faaf

  • C:\Users\Admin\AppData\Roaming\Zoom\ZOOMDO~1\VCREDI~1.EXE

    Filesize

    4.1MB

    MD5

    f99425f909e162c528e348ec91dedda1

    SHA1

    826f02f8e0bf20566bb2aa62fc366a07935120eb

    SHA256

    98f9645ca3f276e73bdaab64f87ab94396ce5169c87434fe6b7d888b149760a5

    SHA512

    bf5cda9d2b133df420cc27e1b5765a181a9c4fa9bc169c3fa42daba95f14325206d7d13001464ca7aba3ea7bda2225dad23a0efe7abde119fe4ff5ff16bbf0f1

  • C:\Users\Admin\AppData\Roaming\Zoom\ZoomDownload\Installer.exe

    Filesize

    1.1MB

    MD5

    d054774948f320d838fbe6c73135e9e8

    SHA1

    f7008b18aba291e719fb7f8b27d509e03a69ec9b

    SHA256

    ac11c769e26f83b847cf6ca037fa99e9502a2d6902682ef8d2bf0c58900ced1c

    SHA512

    e6e96fc2a27c06ad332bc85d1949163bdb22df69c6cbf092715f1a3be283983c4c76d0751034e0bee9d6a79e8e4d93ca16efbab2642e8e0ad68290ff4fe58c65

  • memory/1540-106-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/1540-107-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/1540-108-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/1540-109-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/1540-111-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB