Analysis

  • max time kernel
    142s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/01/2025, 12:55

General

  • Target

    random.exe

  • Size

    1.4MB

  • MD5

    ebe8a0f61f53a3817c3fbcc3ab3a1f4c

  • SHA1

    d87d66d53f29464d1f32b2c1e3b7ce507c51c40d

  • SHA256

    27f53d6d1b4f4edb6c517ac1a517a4e9158d5d96eeccfd324c925d3772c3f44c

  • SHA512

    33138b6fc03af9598821377dfdacaad64a56b7a05e7c7ae48de958e0002c8eec695e49633aec8be212be321f525ca165e40abf81bf0c69a57a0582f94698385b

  • SSDEEP

    24576:HMjhUS5MaULo18LoNubLFwUoTh+tasCU1Yc0zRgYEz405bmktUNudtJjdPrF:6t5CLQ8sNg9oThYoic27cab7SNudXjdZ

Malware Config

Extracted

Family

xworm

Version

5.0

C2

91.212.166.99:4404

Mutex

f35pmRFzPiiasEf1

Attributes
  • Install_directory

    %LocalAppData%

  • install_file

    dllhost.exe

aes.plain

Signatures

  • Detect Xworm Payload 1 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Xworm family
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 8 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

    Using powershell.exe command.

  • Looks up external IP address via web service 1 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • 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.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\random.exe
    "C:\Users\Admin\AppData\Local\Temp\random.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4992
    • C:\Users\Admin\AppData\Local\Temp\is-O9LEQ.tmp\random.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-O9LEQ.tmp\random.tmp" /SL5="$6020E,1104885,161792,C:\Users\Admin\AppData\Local\Temp\random.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4740
      • C:\Users\Admin\AppData\Local\Temp\random.exe
        "C:\Users\Admin\AppData\Local\Temp\random.exe" /VERYSILENT
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:5084
        • C:\Users\Admin\AppData\Local\Temp\is-LKMU5.tmp\random.tmp
          "C:\Users\Admin\AppData\Local\Temp\is-LKMU5.tmp\random.tmp" /SL5="$501F6,1104885,161792,C:\Users\Admin\AppData\Local\Temp\random.exe" /VERYSILENT
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of WriteProcessMemory
          PID:2376
          • C:\Windows\SysWOW64\regsvr32.exe
            "regsvr32.exe" /s /i:SYNC "C:\Users\Admin\AppData\Roaming\\uxtheme_2.drv"
            5⤵
            • Loads dropped DLL
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:1336
            • C:\Windows\system32\regsvr32.exe
              /s /i:SYNC "C:\Users\Admin\AppData\Roaming\\uxtheme_2.drv"
              6⤵
              • Loads dropped DLL
              • Suspicious behavior: AddClipboardFormatListener
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:2856
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/S /i:SYNC C:\Users\Admin\AppData\Roaming\uxtheme_2.drv' }) { exit 0 } else { exit 1 }"
                7⤵
                • Command and Scripting Interpreter: PowerShell
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:4468
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                "powershell" "Register-ScheduledTask -Action (New-ScheduledTaskAction -Execute \"regsvr32\" -Argument \"/S /i:SYNC C:\Users\Admin\AppData\Roaming\uxtheme_2.drv\") -Trigger (New-ScheduledTaskTrigger -Once -At (Get-Date).AddMinutes(1) -RepetitionInterval (New-TimeSpan -Minutes 1)) -TaskName 'MicrosoftEdgeUpdateTaskMachineUA{D1AD7B3E-B38B-4E86-8B24-44C6BE037043}' -Description 'MicrosoftEdgeUpdateTaskMachineUA' -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -ExecutionTimeLimit 0) -RunLevel Highest"
                7⤵
                • Command and Scripting Interpreter: PowerShell
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:2444
              • C:\Windows\System32\schtasks.exe
                "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "dllhost" /tr "C:\Users\Admin\AppData\Local\dllhost.exe"
                7⤵
                • Scheduled Task/Job: Scheduled Task
                PID:1660
  • C:\Users\Admin\AppData\Local\dllhost.exe
    C:\Users\Admin\AppData\Local\dllhost.exe
    1⤵
    • Executes dropped EXE
    PID:2236
  • C:\Windows\system32\regsvr32.EXE
    C:\Windows\system32\regsvr32.EXE /S /i:SYNC C:\Users\Admin\AppData\Roaming\uxtheme_2.drv
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3468
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/S /i:SYNC C:\Users\Admin\AppData\Roaming\uxtheme_2.drv' }) { exit 0 } else { exit 1 }"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      PID:2396
  • C:\Users\Admin\AppData\Local\dllhost.exe
    C:\Users\Admin\AppData\Local\dllhost.exe
    1⤵
    • Executes dropped EXE
    PID:1628
  • C:\Windows\system32\regsvr32.EXE
    C:\Windows\system32\regsvr32.EXE /S /i:SYNC C:\Users\Admin\AppData\Roaming\uxtheme_2.drv
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3248
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/S /i:SYNC C:\Users\Admin\AppData\Roaming\uxtheme_2.drv' }) { exit 0 } else { exit 1 }"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      PID:2008

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    3KB

    MD5

    661739d384d9dfd807a089721202900b

    SHA1

    5b2c5d6a7122b4ce849dc98e79a7713038feac55

    SHA256

    70c3ecbaa6df88e88df4efc70968502955e890a2248269641c4e2d4668ef61bf

    SHA512

    81b48ae5c4064c4d9597303d913e32d3954954ba1c8123731d503d1653a0d848856812d2ee6951efe06b1db2b91a50e5d54098f60c26f36bc8390203f4c8a2d8

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

    Filesize

    1KB

    MD5

    fc35bf2367ee5c6feb084ab39f5c26eb

    SHA1

    cd9742c05391a92780a81fe836797a5909c7f9c1

    SHA256

    7ad08f1c2e7df4102eb3a6d213f4a0c245300c275fd53e463655a8ab9fa3ec64

    SHA512

    0b6662ea93907902c9f5db98bed4e9d322a69e7b8df921f6b8bd8026fdbfa556b0afe29013e3ecc8982a6339c48b4fe371ba587f02c39de72cb3840ed0e6747b

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

    Filesize

    1KB

    MD5

    00068d34580ca0b4e186c4a6f303b09e

    SHA1

    59fe7294b796d4848709b32042246f1bb73acfab

    SHA256

    68f5b87085e5d444e29c42f79d24740e03f6658edb8bd2230cce896aac871fa6

    SHA512

    96359172ef18684d8b81977a3d79246427ce0b328e160f2e8b548b338feb081817293b04593960f679915c42a5b86255b30f5b56d06318de8dcb4e77e9d277ea

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

    Filesize

    1KB

    MD5

    9c594f077d5a28f772c2f05ada17636b

    SHA1

    f139c59084f7a70b19e67dfae9e99a66b95d601d

    SHA256

    d8d871ff1409d75e4b05bb96983ad4cb62ba156908f583ab92e5f05098bde16c

    SHA512

    4e8d476e9b56016bcddd26f66a093eb258b0e4430b0741bf2d1bcb9656d2de0d2ea48a90f68ff6986441ccb5c8a38bc3c4710833de089e8fb5309313b93762fb

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_grfgq1f5.tq0.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\is-76G93.tmp\_isetup\_isdecmp.dll

    Filesize

    13KB

    MD5

    a813d18268affd4763dde940246dc7e5

    SHA1

    c7366e1fd925c17cc6068001bd38eaef5b42852f

    SHA256

    e19781aabe466dd8779cb9c8fa41bbb73375447066bb34e876cf388a6ed63c64

    SHA512

    b310ed4cd2e94381c00a6a370fcb7cc867ebe425d705b69caaaaffdafbab91f72d357966916053e72e68ecf712f2af7585500c58bb53ec3e1d539179fcb45fb4

  • C:\Users\Admin\AppData\Local\Temp\is-K8LG1.tmp\_isetup\_shfoldr.dll

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • C:\Users\Admin\AppData\Local\Temp\is-O9LEQ.tmp\random.tmp

    Filesize

    1.1MB

    MD5

    bcc236a3921e1388596a42b05686ff5e

    SHA1

    43bffbbac6a1bf5f1fa21e971e06e6f1d0af9263

    SHA256

    43a656bcd060e8a36502ca2deb878d56a99078f13d3e57dcd73a87128588c9e9

    SHA512

    e3baaf1a8f4eb0e1ab57a1fb35bc7ded476606b65fafb09835d34705d8c661819c3cfa0ecc43c5a0d0085fd570df581438de27944e054e12c09a6933bbf5ce04

  • C:\Users\Admin\AppData\Local\dllhost.exe

    Filesize

    24KB

    MD5

    b0c2fa35d14a9fad919e99d9d75e1b9e

    SHA1

    8d7c2fd354363daee63e8f591ec52fa5d0e23f6f

    SHA256

    022cb167a29a32dae848be91aef721c74f1975af151807dafcc5ed832db246b7

    SHA512

    a6155e42b605425914d1bf745d9b2b5ed57976e161384731c6821a1f8fa2bc3207a863ae45d6ad371ac82733b72bb024204498baa4fb38ad46c6d7bc52e5a022

  • C:\Users\Admin\AppData\Roaming\uxtheme_2.drv

    Filesize

    3.0MB

    MD5

    022a2e01cd6ff624652952cf43b0fe0d

    SHA1

    f3670138ac48304d5ce26202ed51b20ada4f0052

    SHA256

    f4213387bf82edf9929ba45b8c4d6942e99b31b7b3d155f0b7d1d22bffe1d607

    SHA512

    c0ad1737197ce2216287a2d53251048a8cfca7ee67a54f3316b0d7be12728114e2b68e8b92b67eb5b6e3115164a02589c449f4432c1b9a7dc35c2f49d44e6155

  • memory/2376-31-0x00007FFA26150000-0x00007FFA26345000-memory.dmp

    Filesize

    2.0MB

  • memory/2376-53-0x00007FFA26150000-0x00007FFA26345000-memory.dmp

    Filesize

    2.0MB

  • memory/2376-52-0x0000000000400000-0x000000000052D000-memory.dmp

    Filesize

    1.2MB

  • memory/2856-83-0x00007FFA07760000-0x00007FFA07A60000-memory.dmp

    Filesize

    3.0MB

  • memory/2856-82-0x0000000002420000-0x0000000002430000-memory.dmp

    Filesize

    64KB

  • memory/3248-123-0x00007FFA07760000-0x00007FFA07A60000-memory.dmp

    Filesize

    3.0MB

  • memory/3468-103-0x00007FFA07760000-0x00007FFA07A60000-memory.dmp

    Filesize

    3.0MB

  • memory/4468-56-0x0000023DC3AD0000-0x0000023DC3AF2000-memory.dmp

    Filesize

    136KB

  • memory/4740-24-0x0000000000400000-0x000000000052D000-memory.dmp

    Filesize

    1.2MB

  • memory/4740-25-0x00007FFA26150000-0x00007FFA26345000-memory.dmp

    Filesize

    2.0MB

  • memory/4740-7-0x00007FFA26150000-0x00007FFA26345000-memory.dmp

    Filesize

    2.0MB

  • memory/4992-0-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB

  • memory/4992-2-0x00007FFA26150000-0x00007FFA26345000-memory.dmp

    Filesize

    2.0MB

  • memory/4992-27-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB

  • memory/5084-23-0x00007FFA26150000-0x00007FFA26345000-memory.dmp

    Filesize

    2.0MB

  • memory/5084-54-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB

  • memory/5084-21-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB