Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-03-2024 03:21

General

  • Target

    8c6c723a4839d62780e8761b9513df5b.exe

  • Size

    189KB

  • MD5

    8c6c723a4839d62780e8761b9513df5b

  • SHA1

    3704056af3cc91c56fcca5577a60843a99732e7d

  • SHA256

    279ef35a9f2748763ffa8107d1f6c3cf6d629979ea58403af6b2297f80d9eb72

  • SHA512

    46360c4493ade57dc92112bc59681c0cc787fc192b132cbd8e62bdbbeeb23694c2a112ec2d6fad20e4630a92eaacfbf5444bc817e281fd7da7ff85b43737562d

  • SSDEEP

    3072:lojUMpar9prL/txWwbPCXMoHTXdv14469I6HptMTmshOR9:hrr9pnzbPnoH36HptMphOR

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 2 IoCs
  • Renames multiple (172) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 3 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.

  • Drops desktop.ini file(s) 34 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies registry class 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 56 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8c6c723a4839d62780e8761b9513df5b.exe
    "C:\Users\Admin\AppData\Local\Temp\8c6c723a4839d62780e8761b9513df5b.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3740
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Checks computer location settings
      • Drops startup file
      • Executes dropped EXE
      • Drops desktop.ini file(s)
      • Sets desktop wallpaper using registry
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4212
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\@zarik [email protected]
        3⤵
          PID:4052
    • 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=4796 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8
      1⤵
        PID:4024

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Roaming\svchost.exe

        Filesize

        189KB

        MD5

        8c6c723a4839d62780e8761b9513df5b

        SHA1

        3704056af3cc91c56fcca5577a60843a99732e7d

        SHA256

        279ef35a9f2748763ffa8107d1f6c3cf6d629979ea58403af6b2297f80d9eb72

        SHA512

        46360c4493ade57dc92112bc59681c0cc787fc192b132cbd8e62bdbbeeb23694c2a112ec2d6fad20e4630a92eaacfbf5444bc817e281fd7da7ff85b43737562d

      • C:\Users\Admin\Documents\@zarik [email protected]

        Filesize

        192B

        MD5

        0f3192c97d96e862abdd464698ecbc9f

        SHA1

        d6ad1e331a8c8403159e09a16cc1ddb4b24534fb

        SHA256

        ae0665dbe51e1fc225ed189c55b77b33a17d2f707201abdc1fc3d587a424ba0e

        SHA512

        847836318b900001b2da9db34a70d8139f19132ed5d69d78c1015f24d7c5b0d4eeedae3c74717a2e24f67ec96ed68dc143dfae55db9a6773602756edac2f0aa7

      • memory/3740-0-0x0000000000670000-0x00000000006A6000-memory.dmp

        Filesize

        216KB

      • memory/3740-1-0x00007FF893B40000-0x00007FF894601000-memory.dmp

        Filesize

        10.8MB

      • memory/3740-14-0x00007FF893B40000-0x00007FF894601000-memory.dmp

        Filesize

        10.8MB

      • memory/4212-15-0x00007FF893B40000-0x00007FF894601000-memory.dmp

        Filesize

        10.8MB

      • memory/4212-400-0x00007FF893B40000-0x00007FF894601000-memory.dmp

        Filesize

        10.8MB