Analysis

  • max time kernel
    140s
  • max time network
    159s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-05-2024 01:22

General

  • Target

    9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43.exe

  • Size

    2.0MB

  • MD5

    3a52d37f4e4c3ac752376cfbcc26755d

  • SHA1

    b8bb2de877a135c8fb4e50a297e78aefc81939e9

  • SHA256

    9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43

  • SHA512

    e8abe45358606273cf82eccd4dfe9f8ef6dfa03b400f15e79db99988fb3f5faed77d228cbf30b3d3855b3ee0f35425d2c089e6fe225cb7d584afbd2deab42aa6

  • SSDEEP

    49152:7QzHt472D7JtTF+TxMoxc1TU+j+dAzGwlrh:7QzHt9tIuoITsdZ

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

  • Detect Vidar Stealer 9 IoCs
  • Stealc

    Stealc is an infostealer written in C++.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Suspicious use of SetThreadContext 1 IoCs
  • Checks processor information in registry 2 TTPs 1 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43.exe
    "C:\Users\Admin\AppData\Local\Temp\9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:568
    • C:\Users\Admin\AppData\Local\Temp\kat1623.tmp
      C:\Users\Admin\AppData\Local\Temp\kat1623.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4048
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4416 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4644

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\kat1623.tmp
      Filesize

      861KB

      MD5

      66064dbdb70a5eb15ebf3bf65aba254b

      SHA1

      0284fd320f99f62aca800fb1251eff4c31ec4ed7

      SHA256

      6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

      SHA512

      b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

    • memory/568-9-0x0000000000400000-0x0000000000601000-memory.dmp
      Filesize

      2.0MB

    • memory/568-1-0x0000000004120000-0x0000000004269000-memory.dmp
      Filesize

      1.3MB

    • memory/568-0-0x00000000023B0000-0x00000000023B1000-memory.dmp
      Filesize

      4KB

    • memory/4048-10-0x0000000000400000-0x0000000000646000-memory.dmp
      Filesize

      2.3MB

    • memory/4048-8-0x0000000000400000-0x0000000000646000-memory.dmp
      Filesize

      2.3MB

    • memory/4048-4-0x0000000000400000-0x0000000000646000-memory.dmp
      Filesize

      2.3MB

    • memory/4048-14-0x0000000000400000-0x0000000000646000-memory.dmp
      Filesize

      2.3MB

    • memory/4048-15-0x0000000000400000-0x0000000000646000-memory.dmp
      Filesize

      2.3MB

    • memory/4048-16-0x0000000000400000-0x0000000000646000-memory.dmp
      Filesize

      2.3MB

    • memory/4048-18-0x0000000019340000-0x000000001959F000-memory.dmp
      Filesize

      2.4MB

    • memory/4048-33-0x0000000000400000-0x0000000000646000-memory.dmp
      Filesize

      2.3MB

    • memory/4048-34-0x0000000000400000-0x0000000000646000-memory.dmp
      Filesize

      2.3MB