Analysis

  • max time kernel
    15s
  • max time network
    16s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    08-11-2024 19:52

General

  • Target

    e8af6b996ef72510ec7af7342f3a046c4e6ef20fc717af3091ba03a72ffd89eeN.msi

  • Size

    664KB

  • MD5

    94d2ef7db81197413140692de0985b00

  • SHA1

    e52458822912fbd89249b9dae5b24692b8e67cca

  • SHA256

    e8af6b996ef72510ec7af7342f3a046c4e6ef20fc717af3091ba03a72ffd89ee

  • SHA512

    a9ba867949545339e56fd5355681df5dda69b3007d3b6660aa75dc6014a7425d3f000661c6e6a82c899a718eb51cf280616cc718c72d30f5bbb39313f9e9419f

  • SSDEEP

    12288:qtVRQ+gjpjegDro8EdWd10DTCW1uF+Sf2ppmvrfOgR7a+9Rd:qt9cpVDhE81ckhmIvrfnUA

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • Chaos family
  • Modifies file permissions 1 TTPs 2 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Windows directory 11 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 5 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies data under HKEY_USERS 43 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 54 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\e8af6b996ef72510ec7af7342f3a046c4e6ef20fc717af3091ba03a72ffd89eeN.msi
    1⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:3044
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2520
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 7DFCD4DC4D59496333BDC11E185E5247
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1948
      • C:\Windows\SysWOW64\ICACLS.EXE
        "C:\Windows\system32\ICACLS.EXE" "C:\Users\Admin\AppData\Local\Temp\MW-70b2a831-f1f1-446e-b343-11b2e81ff9e3\." /SETINTEGRITYLEVEL (CI)(OI)HIGH
        3⤵
        • Modifies file permissions
        • System Location Discovery: System Language Discovery
        PID:1816
      • C:\Windows\SysWOW64\EXPAND.EXE
        "C:\Windows\system32\EXPAND.EXE" -R files.cab -F:* files
        3⤵
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        PID:1844
      • C:\Users\Admin\AppData\Local\Temp\MW-70b2a831-f1f1-446e-b343-11b2e81ff9e3\files\keygenran.exe
        "C:\Users\Admin\AppData\Local\Temp\MW-70b2a831-f1f1-446e-b343-11b2e81ff9e3\files\keygenran.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2144
        • C:\Windows\system32\WerFault.exe
          C:\Windows\system32\WerFault.exe -u -p 2144 -s 564
          4⤵
            PID:2160
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c rd /s /q "C:\Users\Admin\AppData\Local\Temp\MW-70b2a831-f1f1-446e-b343-11b2e81ff9e3\files"
          3⤵
          • System Location Discovery: System Language Discovery
          PID:2152
        • C:\Windows\SysWOW64\ICACLS.EXE
          "C:\Windows\system32\ICACLS.EXE" "C:\Users\Admin\AppData\Local\Temp\MW-70b2a831-f1f1-446e-b343-11b2e81ff9e3\." /SETINTEGRITYLEVEL (CI)(OI)LOW
          3⤵
          • Modifies file permissions
          • System Location Discovery: System Language Discovery
          PID:1520
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:776
    • C:\Windows\system32\DrvInst.exe
      DrvInst.exe "1" "200" "STORAGE\VolumeSnapshot\HarddiskVolumeSnapshot19" "" "" "61530dda3" "0000000000000000" "0000000000000598" "0000000000000388"
      1⤵
      • Drops file in Windows directory
      • Modifies data under HKEY_USERS
      • Suspicious use of AdjustPrivilegeToken
      PID:2768

    Network

    MITRE ATT&CK Enterprise v15

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\MW-70b2a831-f1f1-446e-b343-11b2e81ff9e3\files.cab

      Filesize

      388KB

      MD5

      03fe272172afe473673575357d0e8cc8

      SHA1

      c65ecd5f16f526782921ecb71643d51ef7304b81

      SHA256

      80f11d6eb95e168459f46201e3aca4fee23bdeb2f7bb5ee710a7d4003f4517e1

      SHA512

      b75b2f82454e3efd106616afa72eefddf00eb85aa3cb209774c1482432d92b65ce19a8bce403b2c5692df6a5fdf48e11cadb693656fc8012551caa2e4df3473a

    • C:\Users\Admin\AppData\Local\Temp\MW-70b2a831-f1f1-446e-b343-11b2e81ff9e3\files\keygenran.exe

      Filesize

      388KB

      MD5

      d313cf4e6bf5e9dcb2ed3e722984bc8e

      SHA1

      21a28a94e0de60603ad1664a843717a8aeba30c9

      SHA256

      739e1ab9e63ec4da436b2861c3c23111a823676896b6f2f40cf0051bf5c0e951

      SHA512

      2a0d479f8b299370bb67ce34f4dfb58b52c70e7edcfa1f9cb6c40a6162455b77aad70bfd1f619dda327d969852eb1c20c7768f1c4247450740c203521f37ff34

    • C:\Users\Admin\AppData\Local\Temp\MW-70b2a831-f1f1-446e-b343-11b2e81ff9e3\msiwrapper.ini

      Filesize

      460B

      MD5

      95ef233c0968f979a74f7bc42f70bcf4

      SHA1

      6139fcf072155b740aeb2bbee5b80054bfb38800

      SHA256

      4ec09a79cf99be52075db055411274ff7658a53fefa581235004eb83cb38e843

      SHA512

      8510f00a1414712cbd55f76bc8da78880d4495ed2a81a9a74881ef20b4f74c29f1577a216d7ce585ddc134acb8d579e828460027faf6018f9e7d8b280e1b1458

    • C:\Users\Admin\AppData\Local\Temp\MW-70b2a831-f1f1-446e-b343-11b2e81ff9e3\msiwrapper.ini

      Filesize

      1KB

      MD5

      2cb136d0484c8150bc9ef28b847868bf

      SHA1

      aeaf1237655b13bd2dfaa20a49f4d85cbe09e777

      SHA256

      503354f06f706784a0c0f72502ae185de463164209d2dbf863652345e10854f8

      SHA512

      ac7f287da1c506275a27f30ed9b76189814bdec5e8056572a79f2a17277a35096fcc63b19207bfd3eb2077dd228d8e0c71fe5fc6661bb551ba3f801b9d7ee91c

    • C:\Windows\Installer\MSIBEFB.tmp

      Filesize

      208KB

      MD5

      0c8921bbcc37c6efd34faf44cf3b0cb5

      SHA1

      dcfa71246157edcd09eecaf9d4c5e360b24b3e49

      SHA256

      fd622cf73ea951a6de631063aba856487d77745dd1500adca61902b8dde56fe1

      SHA512

      ed55443e20d40cca90596f0a0542fa5ab83fe0270399adfaafd172987fb813dfd44ec0da0a58c096af3641003f830341fe259ad5bce9823f238ae63b7e11e108

    • memory/2144-71-0x00000000002C0000-0x0000000000326000-memory.dmp

      Filesize

      408KB