Analysis

  • max time kernel
    127s
  • max time network
    141s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    22-08-2024 23:18

General

  • Target

    cum.exe

  • Size

    7.2MB

  • MD5

    e458411c85a5aea36d6314e286bafdbf

  • SHA1

    750f15ec6e86e74ef852f7f43395145dbd873b98

  • SHA256

    02be84308541ec4d7614933e6a4985c8fdc7213ab873e7ca5c0aabfe5356e473

  • SHA512

    129083d7d8804ee46f8021895e162fdc0229ad5e75abeabb2b070036c1fc436f33a770d329f89c5d310b5e9ac1c91eace67e3782bda28fcc6fc800244dd07af2

  • SSDEEP

    196608:tkpNA8RaKWfeYWBFrUpBfNNNAqvM4M+etNvdv:tkpNAGvHlSNhMH+oNV

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1276045605986107432/__jDxBNn4eIwDgfsF9Nvf_usMcbmRdQMO6KCi-9i1IoMGuWJto51uvjMtD8ys47YkqVM

Extracted

Family

xworm

C2

10.9.92.54:80

Attributes
  • install_file

    USB.exe

Signatures

  • Detect Umbral payload 2 IoCs
  • Detect Xworm Payload 2 IoCs
  • Umbral

    Umbral stealer is an opensource moduler stealer written in C#.

  • Xworm

    Xworm is a remote access trojan written in C#.

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 6 IoCs

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

  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • Detects Pyinstaller 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 57 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cum.exe
    "C:\Users\Admin\AppData\Local\Temp\cum.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2712
    • C:\Users\Admin\AppData\Roaming\lol.exe
      "C:\Users\Admin\AppData\Roaming\lol.exe"
      2⤵
      • Drops file in Drivers directory
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:664
      • C:\Windows\system32\attrib.exe
        "attrib.exe" +h +s "C:\Users\Admin\AppData\Roaming\lol.exe"
        3⤵
        • Views/modifies file attributes
        PID:2692
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\lol.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2952
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2120
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1944
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2460
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" os get Caption
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1752
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" computersystem get totalphysicalmemory
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2604
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        3⤵
          PID:948
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
          3⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          PID:1192
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic" path win32_VideoController get name
          3⤵
          • Detects videocard installed
          PID:752
        • C:\Windows\system32\cmd.exe
          "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Roaming\lol.exe" && pause
          3⤵
          • System Network Configuration Discovery: Internet Connection Discovery
          • Suspicious use of WriteProcessMemory
          PID:2124
          • C:\Windows\system32\PING.EXE
            ping localhost
            4⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Runs ping.exe
            PID:1572
      • C:\Users\Admin\AppData\Roaming\Genesis_Loader.exe
        "C:\Users\Admin\AppData\Roaming\Genesis_Loader.exe"
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:2912
        • C:\Users\Admin\AppData\Roaming\obf.exe
          "C:\Users\Admin\AppData\Roaming\obf.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2868
          • 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\obf.exe'
            4⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:936
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'obf.exe'
            4⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:2084
        • C:\Users\Admin\AppData\Roaming\Main (1).exe
          "C:\Users\Admin\AppData\Roaming\Main (1).exe"
          3⤵
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:2756
          • C:\Users\Admin\AppData\Roaming\Main (1).exe
            "C:\Users\Admin\AppData\Roaming\Main (1).exe"
            4⤵
            • Executes dropped EXE
            • Loads dropped DLL
            PID:2664

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\_MEI27562\python312.dll

      Filesize

      6.6MB

      MD5

      d521654d889666a0bc753320f071ef60

      SHA1

      5fd9b90c5d0527e53c199f94bad540c1e0985db6

      SHA256

      21700f0bad5769a1b61ea408dc0a140ffd0a356a774c6eb0cc70e574b929d2e2

      SHA512

      7a726835423a36de80fb29ef65dfe7150bd1567cac6f3569e24d9fe091496c807556d0150456429a3d1a6fd2ed0b8ae3128ea3b8674c97f42ce7c897719d2cd3

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

      Filesize

      7.0MB

      MD5

      899a7de8d656ccb777f62ae16ee99ae9

      SHA1

      40ee23565d7d3d51f1abca51d1721c684f3955c2

      SHA256

      210a96f684b7cea559d755f27933d623beb50be519ace32a851bb9ac3ee8e44a

      SHA512

      b7bcb936d028cd6f61e074a57bbb7f2a62c1e974afa55c16f88a45b1a0c6cad1fd19f28cb63dfcb6d1cf1a107e6d6a33def79a1099023f2fde012963a087e3e8

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

      Filesize

      7KB

      MD5

      166c4054423cc1fb87425c4d8014bdcb

      SHA1

      cadccb892f4202af862951b4f8185e61bdbe4296

      SHA256

      dd37040ab8c7b912595d344c61ecb2c5857efcd1c4e7c4793eb571874650d094

      SHA512

      dcaad4825a0545aac9ed227fa47247414636504afa75e6157dc2a813b82c2a10c2911cebd16685d7ea623a835b4c7823667af92d323682802fc5abccf58d3535

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

      Filesize

      229KB

      MD5

      ea031754ac9fe28dbc0c5915cb638e44

      SHA1

      14b2c7b94aefdfc911e26fc5deb6eb8b6d7c0aed

      SHA256

      cfb7119e9b1eea0c3f511fb51952399c3f10edb91e12030e49a30172b0510e7e

      SHA512

      39a0790b3bae0862b1ba87bd6d1165694ba09cfa5104935e00ebaa13924699b2efba92ee6e744d3d820a9c05f80fa41fa1649498dce8f430835e8c6e813c25bb

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

      Filesize

      72KB

      MD5

      5c2b1ec1c68b749d6a276addd31460d7

      SHA1

      0a370422c2c29aed0d16e8012545e21197d21821

      SHA256

      b486197aa0e45a64681e66d42a3041461f5a665d24010f36d7d78dfeec828d4b

      SHA512

      b7a2fdc569a8f423a9b9001ccb0e7376355b2e9b8bc6380805fe2ebd196371e11a0dd1a67ea2d01541b0495d4bfa692dcecb6911963fd1b0ce5831223d5a3595

    • \Users\Admin\AppData\Roaming\Main (1).exe

      Filesize

      6.9MB

      MD5

      376a81c9dbc8637ff9d12b382c7b5649

      SHA1

      52dc9915ce4f05054c7130c061683edd7b97978c

      SHA256

      94374b24ffd5dd3422890e362c8cd49c785b536d6148698b00cbcbcccc2eac75

      SHA512

      ce270e7dc43697bf98798f66f7c5a8724b75bee58cacf3a183f73d70785976425b8b518776060267f181fe1b7bfa4f36e1d47a7be81f9ee916f997c310ff7c05

    • memory/664-7-0x0000000001270000-0x00000000012B0000-memory.dmp

      Filesize

      256KB

    • memory/664-16-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

      Filesize

      9.9MB

    • memory/664-105-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

      Filesize

      9.9MB

    • memory/664-96-0x000007FEF5580000-0x000007FEF5F6C000-memory.dmp

      Filesize

      9.9MB

    • memory/2120-63-0x00000000024E0000-0x00000000024E8000-memory.dmp

      Filesize

      32KB

    • memory/2120-62-0x000000001B3C0000-0x000000001B6A2000-memory.dmp

      Filesize

      2.9MB

    • memory/2712-0-0x000007FEF5583000-0x000007FEF5584000-memory.dmp

      Filesize

      4KB

    • memory/2712-1-0x0000000000B70000-0x00000000012B0000-memory.dmp

      Filesize

      7.2MB

    • memory/2868-20-0x00000000010B0000-0x00000000010C8000-memory.dmp

      Filesize

      96KB

    • memory/2912-13-0x00000000000E0000-0x00000000007E4000-memory.dmp

      Filesize

      7.0MB

    • memory/2952-46-0x0000000001E20000-0x0000000001E28000-memory.dmp

      Filesize

      32KB

    • memory/2952-45-0x000000001B210000-0x000000001B4F2000-memory.dmp

      Filesize

      2.9MB