Analysis

  • max time kernel
    142s
  • max time network
    142s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-04-2024 23:44

General

  • Target

    99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe

  • Size

    26KB

  • MD5

    8222cc29fdeb85cc5e71e5d2ba2cdc0e

  • SHA1

    467737c290a4db43806df42bcbdf4e37586a2f11

  • SHA256

    99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af

  • SHA512

    5cbae650c63b1f8d10943a9925af881b8dbafd27305997a0450c21993c45c862ed84b934860955f938ea3bdeffc791470e391370d933b2bc071cf72e7d07bb71

  • SSDEEP

    768:XkX3LKew369lp2z3Sd4baFXLjwP/Tgj93b8NIoT:6KcR4mjD9r82E

Malware Config

Signatures

  • UPX dump on OEP (original entry point) 7 IoCs
  • 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.

  • UPX packed file 7 IoCs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe
    "C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4364
    • C:\Windows\CTS.exe
      "C:\Windows\CTS.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      PID:3388
  • 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=760 --field-trial-handle=2276,i,1205556100727695622,5044463180471657307,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:2000

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

      Filesize

      349KB

      MD5

      8dd6b7bea58e828ba83664e97517d2b3

      SHA1

      570d5859ef904e1ccfd8a5099c610112af5b1846

      SHA256

      f9fa35a38a5cd40a9be1737ed6fd53d7a26ef74590d2e80ba24dac487e2c6b3d

      SHA512

      814e7a73b0280e139e0ee4ff8cfab822e142ba575d3efb4612c8369be5230e115bf25c545636091b30de4098ac693b7d93e8238845830d2e654e44bde574ec11

    • C:\Users\Admin\AppData\Local\Temp\fkN11rRNfm4VVt7.exe

      Filesize

      26KB

      MD5

      f8f8c93eac92cd71e178137ccef9ef55

      SHA1

      af3dde6566485eeaeec26de3908d3098354369a0

      SHA256

      f992a996512c53eb0c51ba0ed95825826ca45d516eb960233cc8e8aec306eb2b

      SHA512

      b330b26413300c7f727b86f7cb5550780d0151b306b3ed169889fca8b2b069d46eb408756d24033bacff2eacb8fa30fd09c6390be4f5a94e66d89145a7bc8a7c

    • C:\Windows\CTS.exe

      Filesize

      26KB

      MD5

      286211b8e0aad0533c45d8b8c351cc70

      SHA1

      cb54a305a566c00742fb972c4ee62266e880ea78

      SHA256

      1955407b2fd523e375303d560b987216b95105b421a8471218c0b65ceba847f3

      SHA512

      91eddd484a40aee3a7a9254fd6843b3d9dd455e6a2c4d685d499ab1704d8644a6dc604ad14449e96b0754ae3e6c1c14c16d068605aa4e39840e0421aa7a4be35

    • memory/3388-8-0x0000000000130000-0x0000000000147000-memory.dmp

      Filesize

      92KB

    • memory/3388-30-0x0000000000130000-0x0000000000147000-memory.dmp

      Filesize

      92KB

    • memory/4364-0-0x00000000005C0000-0x00000000005D7000-memory.dmp

      Filesize

      92KB

    • memory/4364-6-0x00000000005C0000-0x00000000005D7000-memory.dmp

      Filesize

      92KB