Overview

overview

10

Static

static

10

JJSploit.exe

windows7-x64

10

JJSploit.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    23-02-2025 02:24

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General

  • Target

    JJSploit.exe

  • Size

    6.6MB

  • MD5

    f29fd0bb7218e3cf63ab6040be0a1698

  • SHA1

    c078e4888d6e1cf6c75a4141d51a1d375c2f71c8

  • SHA256

    ccbcc6269218d292a06db3d9896dc621598a76794881ffbeb6f093d8b54e1c43

  • SHA512

    b68185e83baca3f8779e085fed57a0324fee7528139c4afa245900f206707b645f631cb08d8a2cc3ea6b75a65d0e5ac76c250897e28df2c6e7c4724f7790f40d

  • SSDEEP

    196608:1dNnRdvjsTOvHK19gO8xbecifaCI1L5N1JTLX46:z1RSavI9sbf8vKf5

Score
10/10
umbralxwormdiscoveryexecutionratstealertrojan

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1324340303330545737/uIs8g3XVai83nQDHiKK-YVa0ltDQNJzxQbjP4uxON9omg5HXiArLuwvr7JPc6YmtXDeK

Extracted

Family

xworm

C2

study-conclusions.gl.at.ply.gg:20142

Attributes
  • Install_directory

    %Temp%

  • install_file

    System32.exe

Signatures

  • Detect Umbral payload 3 IoCs
  • Detect Xworm Payload 2 IoCs
  • Umbral

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

    stealerumbral
  • Umbral family
    umbral
  • Xworm

    Xworm is a remote access trojan written in C#.

    trojanratxworm
  • Xworm family
    xworm
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell and hide display window.

    execution
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 9 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

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

  • Looks up external IP address via web service 1 IoCs

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

  • Drops file in Program Files directory 23 IoCs
  • Drops file in Windows directory 12 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

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

    discovery
  • Modifies data under HKEY_USERS 46 IoCs
  • Modifies registry class 35 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs
  • Uses Volume Shadow Copy service COM API

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

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\JJSploit.exe
    "C:\Users\Admin\AppData\Local\Temp\JJSploit.exe"
    1⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2660
    • C:\Users\Admin\AppData\Local\Temp\JJSploitInjector.exe
      "C:\Users\Admin\AppData\Local\Temp\JJSploitInjector.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2764
      • C:\Windows\System32\Wbem\wmic.exe
        "wmic.exe" csproduct get uuid
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2056
    • C:\Users\Admin\AppData\Local\Temp\JJSplo.exe
      "C:\Users\Admin\AppData\Local\Temp\JJSplo.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2752
    • C:\Windows\SysWOW64\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\jjsploit_8.12.2_x64_en-US (1).msi"
      2⤵
      • Enumerates connected drives
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:2012
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Loads dropped DLL
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1236
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding A5A42727AA385EDF6E8646B2D09F5112 C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:2324
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell.exe -NoProfile -windowstyle hidden try { [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12 } catch {}; Invoke-WebRequest -Uri "https://go.microsoft.com/fwlink/p/?LinkId=2124703" -OutFile "$env:TEMP\MicrosoftEdgeWebview2Setup.exe" ; Start-Process -FilePath "$env:TEMP\MicrosoftEdgeWebview2Setup.exe" -ArgumentList ('/silent', '/install') -Wait
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      PID:2472
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
      PID:572
    • C:\Windows\system32\DrvInst.exe
      DrvInst.exe "1" "200" "STORAGE\VolumeSnapshot\HarddiskVolumeSnapshot19" "" "" "61530dda3" "0000000000000000" "0000000000000598" "00000000000005A8"
      1⤵
      • Drops file in Windows directory
      • Modifies data under HKEY_USERS
      PID:2964

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\ProgramData\Microsoft\Windows\Start Menu\Programs\jjsploit\jjsploit.lnk
      Filesize

      1KB

      MD5

      048d1b78c3efecb3e57474414bcf1310

      SHA1

      f9876bb6068c0248a599c444abb6b8350f5cf0a1

      SHA256

      719f149bc7fc9e9abf7fa18fa24a62ae36e50e4813e05025bfb09dc155b7d26a

      SHA512

      e2852e6dac163fb85106d43019efb47a1000ae05bd2d64212a47c02fca2270a97c91f1978c3e1e7b32468d47db2a625ef56d8e5ec062c4cc1ffccfe406956062

      Download Submit

    • C:\Users\Admin\AppData\Local\Temp\MSI5CA1.tmp
      Filesize

      132KB

      MD5

      cfbb8568bd3711a97e6124c56fcfa8d9

      SHA1

      d7a098ae58bdd5e93a3c1b04b3d69a14234d5e57

      SHA256

      7f47d98ab25cfea9b3a2e898c3376cc9ba1cd893b4948b0c27caa530fd0e34cc

      SHA512

      860cbf3286ac4915580cefaf56a9c3d48938eb08e3f31b7f024c4339c037d7c8bdf16e766d08106505ba535be4922a87dc46bd029aae99a64ea2fc02cf3aec04

      Download Submit

    • C:\Users\Admin\AppData\Local\Temp\jjsploit_8.12.2_x64_en-US (1).msi
      Filesize

      6.3MB

      MD5

      d8be6f14b4dd7a85a5b5479e88b940da

      SHA1

      4c1ed04a00fb4fc31cc4c10172d0e6f310faacef

      SHA256

      c3daa5b6503c601bf868de990dc5fe055c266a7cba6e269115290c37fb8a4d05

      SHA512

      77964855eddaf57ebf7810185eacf2bd40bfdd883473ac063223ea496744d81db678c171707d44cfe19077df1fcfb8888a54021fc6af7cb4547dcc464ce717ea

      Download Submit

    • \Program Files\jjsploit\jjsploit.exe
      Filesize

      17.1MB

      MD5

      b393f1b89a320d6a0b42190c6dcb6860

      SHA1

      209e800233976ec908a87db948b5aa175d99b1e8

      SHA256

      ca45895af0e91692514e6f4b8b494e68392821fa18503526243091d7d49e3064

      SHA512

      21be0b7a232e7182455206b13beada6e9614335a0b3ada9875a68620efc14f43723778910dfb6070a47ee8f177d02add1d5a2e60d616fec914a88b9ecb01f0eb

      Download Submit

    • \Users\Admin\AppData\Local\Temp\JJSplo.exe
      Filesize

      68KB

      MD5

      c5ba230193b7f217c0e512a5cb8606e8

      SHA1

      f04b380d5622285d72531e0ed936e5bfe90fb4af

      SHA256

      8fd9fdf831724e2c0227f399e2a8be95304daa91b7fd07db4b245dba1380f9c3

      SHA512

      0c5bd99bdefde5c0a7a809199f0bed1a0590f05ffe12bb554424cf4982b606677c33fafe5e46fc0feb9d5f6163cfbae2fa771a91f9973a6cceae2176b5a3e0a5

      Download Submit

    • \Users\Admin\AppData\Local\Temp\JJSploitInjector.exe
      Filesize

      229KB

      MD5

      760861bfe626a80dcf4d2b13f8d8c76a

      SHA1

      8ce9854d053ce7df079942f6f76550479ccd6325

      SHA256

      ab957ab7e09f994d24ace2b7d1b807e757249465d12e21d5f1916afb1518e27a

      SHA512

      513d447fd8a84b799dbdcd8ea3382375aa8190fb340b51f5b78114bddc721b96fdfbd036ed04520a81664f18ff4a414c908c79bddcf665860486663fbb8d3be2

      Download Submit

    • memory/2472-78-0x000000001B530000-0x000000001B812000-memory.dmp

      Filesize

      2.9MB

      Download

    • memory/2472-79-0x0000000002870000-0x0000000002878000-memory.dmp

      Filesize

      32KB

      Download

    • memory/2660-14-0x0000000000400000-0x0000000000AAC000-memory.dmp

      Filesize

      6.7MB

      Download

    • memory/2752-15-0x0000000000340000-0x0000000000358000-memory.dmp

      Filesize

      96KB

      Download

    • memory/2764-16-0x0000000000940000-0x0000000000980000-memory.dmp

      Filesize

      256KB

      Download