Analysis

  • max time kernel
    26s
  • max time network
    15s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-06-2024 11:21

General

  • Target

    Downloads.exe

  • Size

    411KB

  • MD5

    87ac4c646fd5b62dbabf59fb6ef34fd7

  • SHA1

    45832029b6cfa6c4020ee0e1f965bd5898d5f137

  • SHA256

    65b6f1f4ac0fbc8a7a113548630b284a731e0b219bee029745f2710b6e02c51c

  • SHA512

    b647910eaeaee60b8d2378986bf824dfddfd9b3a4e0f2a8a723406da1a6072bf9171ee12fd0178e027ddfdc4be8fbb4d74f9e94dd470d4342c6711dbe9ea02b7

  • SSDEEP

    12288:Kat0EAH49n8BLaWNO8DlIlaRJ3wWxJS7Xy4WtZ:Ft24saW02pbWO4g

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:32901

engineering-thoroughly.gl.at.ply.gg:32901

Attributes
  • Install_directory

    %AppData%

  • install_file

    OxyInstaller.exe

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/1253302699978526772/b5mqXVOEs47XQy9dHee2Po12VotJwgdPtLauhKlKoyBH-xF42vUZ2Glc0N58n1pvAEdH

Signatures

  • 44Caliber

    An open source infostealer written in C#.

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Drops startup file 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in Program Files directory 6 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Modifies data under HKEY_USERS 15 IoCs
  • Suspicious behavior: EnumeratesProcesses 26 IoCs
  • Suspicious behavior: LoadsDriver 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 10 IoCs
  • Suspicious use of FindShellTrayWindow 26 IoCs
  • Suspicious use of SendNotifyMessage 26 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Downloads.exe
    "C:\Users\Admin\AppData\Local\Temp\Downloads.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:2516
    • C:\Program Files (x86)\sigma\Insidious.exe
      "C:\Program Files (x86)\sigma\Insidious.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4024
    • C:\Program Files (x86)\sigma\oxyinstaller.exe
      "C:\Program Files (x86)\sigma\oxyinstaller.exe"
      2⤵
      • Checks computer location settings
      • Drops startup file
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:400
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\sigma\oxyinstaller.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2920
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'oxyinstaller.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3532
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\OxyInstaller.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3828
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'OxyInstaller.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4884
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /0
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:2012
  • C:\Windows\system32\LogonUI.exe
    "LogonUI.exe" /flags:0x0 /state0:0xa3978055 /state1:0x41c64e6d
    1⤵
    • Modifies data under HKEY_USERS
    • Suspicious use of SetWindowsHookEx
    PID:980

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Program Files (x86)\sigma\Insidious.exe

    Filesize

    303KB

    MD5

    eefb066dcbb1ae4273c3834f74881a25

    SHA1

    013657673cb6fbdc4a04db2a4d01332d9ec37363

    SHA256

    9a23c010ab4bdd266a109740796baecc5b4eb583c1fe8d94b53961a029ca7cc2

    SHA512

    8d5eab85b0a56351bfc56a4940c1097bc3abb93e003135cdacc3e4cbf5b6a464bb3f46750c1466f1ddcffd265f52abf74951eda632d7b31dbd0b7e38c0d99741

  • C:\Program Files (x86)\sigma\oxyinstaller.exe

    Filesize

    325KB

    MD5

    f65b6e70becdeafa363cd101646a0602

    SHA1

    1c6ebde3a18aa9ba02202e8ef4139f6c8bbf0c68

    SHA256

    e304be47ba6bd5a80284e6750f4c97181134e9daa0f581c8c47a665084e49555

    SHA512

    409601c4f5f8c4856d77aded96d466f3f9f057bf1edd635de8db42a946478aed467145249bdc6243d2df0172007b76345550b937d8191c403806ce0a755f21fd

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

    Filesize

    2KB

    MD5

    d85ba6ff808d9e5444a4b369f5bc2730

    SHA1

    31aa9d96590fff6981b315e0b391b575e4c0804a

    SHA256

    84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

    SHA512

    8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    944B

    MD5

    98baf5117c4fcec1692067d200c58ab3

    SHA1

    5b33a57b72141e7508b615e17fb621612cb8e390

    SHA256

    30bf8496e9a08f4fdfe4767abcd565f92b6da06ca1c7823a70cb7cab16262e51

    SHA512

    344a70bfc037d54176f12db91f05bf4295bb587a5062fd1febe6f52853571170bd8ef6042cb87b893185bbae1937cf77b679d7970f8cc1c2666b0b7c1b32987d

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    944B

    MD5

    d28a889fd956d5cb3accfbaf1143eb6f

    SHA1

    157ba54b365341f8ff06707d996b3635da8446f7

    SHA256

    21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

    SHA512

    0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    944B

    MD5

    50632ca0f9f268214d6838e8b7c1fe6f

    SHA1

    5597251238406133385670a63c0b2c3958712f98

    SHA256

    507b78ee9c8e87d59684d3d2cfed038d896b8f9c37c6c36a2a32ef1777eef3dd

    SHA512

    d9997fbd906311e72a928dbcf474dfdd4869a49729e32cec6c529adbb8e48257c21bec4b79b48e396de239b8ea3c668a1eb1092fcbeb09c0b81094da3228c433

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vv4guqwj.jhk.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\OxyInstaller.lnk

    Filesize

    798B

    MD5

    7c111b0c33535e19e32bbc0efd2a9970

    SHA1

    07719cd7ee99c57727e95eb4c132b3f2f562299f

    SHA256

    73e31410099723752c22242ae324497fee3170be7d0ade3f17fc9456140ad65c

    SHA512

    09b2e8d313d2b31bd143c304ae4e9262d91489f190d99e79767887c75e0f54270fd315e8bc1826f28dfdf31e4124e09f4c1cee005faf2ef074d6c42ba1078daf

  • memory/400-124-0x00007FFBF7540000-0x00007FFBF8001000-memory.dmp

    Filesize

    10.8MB

  • memory/400-26-0x0000000000F40000-0x0000000000F98000-memory.dmp

    Filesize

    352KB

  • memory/400-52-0x00007FFBF7540000-0x00007FFBF8001000-memory.dmp

    Filesize

    10.8MB

  • memory/2012-116-0x000001F94F790000-0x000001F94F791000-memory.dmp

    Filesize

    4KB

  • memory/2012-113-0x000001F94F790000-0x000001F94F791000-memory.dmp

    Filesize

    4KB

  • memory/2012-111-0x000001F94F790000-0x000001F94F791000-memory.dmp

    Filesize

    4KB

  • memory/2012-105-0x000001F94F790000-0x000001F94F791000-memory.dmp

    Filesize

    4KB

  • memory/2012-107-0x000001F94F790000-0x000001F94F791000-memory.dmp

    Filesize

    4KB

  • memory/2012-106-0x000001F94F790000-0x000001F94F791000-memory.dmp

    Filesize

    4KB

  • memory/2012-117-0x000001F94F790000-0x000001F94F791000-memory.dmp

    Filesize

    4KB

  • memory/2012-112-0x000001F94F790000-0x000001F94F791000-memory.dmp

    Filesize

    4KB

  • memory/2012-115-0x000001F94F790000-0x000001F94F791000-memory.dmp

    Filesize

    4KB

  • memory/2012-114-0x000001F94F790000-0x000001F94F791000-memory.dmp

    Filesize

    4KB

  • memory/2920-59-0x000001A350CD0000-0x000001A350CF2000-memory.dmp

    Filesize

    136KB

  • memory/4024-57-0x00007FFBF7540000-0x00007FFBF8001000-memory.dmp

    Filesize

    10.8MB

  • memory/4024-58-0x00007FFBF7540000-0x00007FFBF8001000-memory.dmp

    Filesize

    10.8MB

  • memory/4024-24-0x00007FFBF7543000-0x00007FFBF7545000-memory.dmp

    Filesize

    8KB

  • memory/4024-25-0x0000024A7A540000-0x0000024A7A592000-memory.dmp

    Filesize

    328KB