Analysis

  • max time kernel
    41s
  • max time network
    18s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    05-11-2024 11:53

General

  • Target

    c242bdd7350afc95fdfabc309744db405c3a16849340fb978bfd428da6bfb7d9N.exe

  • Size

    570KB

  • MD5

    4767f83ca3ff9905cf4dcac847630e50

  • SHA1

    f9f14f1c80643ca3d7317a7c02c06a9c0bcfa18d

  • SHA256

    c242bdd7350afc95fdfabc309744db405c3a16849340fb978bfd428da6bfb7d9

  • SHA512

    0547c48f60bc64f1fc4c96c51e657e09d7b89453c81cdd07f46fd06c37895c67b4156c3bfabc4c67b52e714dbc76fc98e34382063029151a724bf3ee1a2ad24c

  • SSDEEP

    12288:WCLNPL2KestvAeMUbhJlHrfrIf74NCpfUo9ExtytEwEh:WC1L2U5AGLrIf0YExwtmh

Malware Config

Signatures

  • Detect Neshta payload 5 IoCs
  • Neshta

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

  • Neshta family
  • UAC bypass 3 TTPs 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 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.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Hijack Execution Flow: Executable Installer File Permissions Weakness 1 TTPs 1 IoCs

    Possible Turn off User Account Control's privilege elevation for standard users.

  • UPX packed file 3 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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 Internet Explorer settings 1 TTPs 1 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of FindShellTrayWindow 5 IoCs
  • Suspicious use of SendNotifyMessage 4 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs
  • System policy modification 1 TTPs 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c242bdd7350afc95fdfabc309744db405c3a16849340fb978bfd428da6bfb7d9N.exe
    "C:\Users\Admin\AppData\Local\Temp\c242bdd7350afc95fdfabc309744db405c3a16849340fb978bfd428da6bfb7d9N.exe"
    1⤵
    • Loads dropped DLL
    • 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:2236
    • C:\Users\Admin\AppData\Local\Temp\3582-490\c242bdd7350afc95fdfabc309744db405c3a16849340fb978bfd428da6bfb7d9N.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\c242bdd7350afc95fdfabc309744db405c3a16849340fb978bfd428da6bfb7d9N.exe"
      2⤵
      • UAC bypass
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Hijack Execution Flow: Executable Installer File Permissions Weakness
      • System Location Discovery: System Language Discovery
      • Modifies Internet Explorer settings
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      • System policy modification
      PID:1740

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\MSOCache\ALLUSE~1\{90140~1\dwtrig20.exe

    Filesize

    547KB

    MD5

    cf6c595d3e5e9667667af096762fd9c4

    SHA1

    9bb44da8d7f6457099cb56e4f7d1026963dce7ce

    SHA256

    593e60cc30ae0789448547195af77f550387f6648d45847ea244dd0dd7abf03d

    SHA512

    ff4f789df9e6a6d0fbe12b3250f951fcf11e857906c65e96a30bb46266e7e1180d6103a03db2f3764e0d1346b2de7afba8259ba080057e4a268e45e8654dfa80

  • C:\Users\Admin\AppData\Local\Temp\3582-490\c242bdd7350afc95fdfabc309744db405c3a16849340fb978bfd428da6bfb7d9N.exe

    Filesize

    530KB

    MD5

    02c9eb708d1e6d14fbb9455349ede85e

    SHA1

    ed17a7d9b0eb740231cc8154281b8bd3452397e2

    SHA256

    5638a4b19f3911aa543c1e2dac331192535f4fbcb60f0b8dc5c9485379b6b488

    SHA512

    1c6a1760e65f3274f503f905e0948f5d1fef1836eb3fdb594b83a01a8127a1c3bb7c5576446db6d01ac00f2d330663e8f5b27daf39fbbdf2125f5ae4cfb47c17

  • \PROGRA~2\Adobe\READER~1.0\Reader\LOGTRA~1.EXE

    Filesize

    252KB

    MD5

    9e2b9928c89a9d0da1d3e8f4bd96afa7

    SHA1

    ec66cda99f44b62470c6930e5afda061579cde35

    SHA256

    8899b4ed3446b7d55b54defbc1acb7c5392a4b3bc8ec2cdc7c31171708965043

    SHA512

    2ca5ad1d0e12a8049de885b90b7f56fe77c868e0d6dae4ec4b6f3bc0bf7b2e73295cc9b1328c2b45357ffb0d7804622ab3f91a56140b098e93b691032d508156

  • memory/1740-10-0x0000000000400000-0x00000000006C1000-memory.dmp

    Filesize

    2.8MB

  • memory/1740-103-0x0000000000400000-0x00000000006C1000-memory.dmp

    Filesize

    2.8MB

  • memory/2236-8-0x0000000002600000-0x00000000028C1000-memory.dmp

    Filesize

    2.8MB

  • memory/2236-104-0x0000000002600000-0x00000000028C1000-memory.dmp

    Filesize

    2.8MB

  • memory/2236-105-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/2236-106-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/2236-107-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/2236-109-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB