Resubmissions

09/06/2024, 14:57

240609-sbqb1acd769

09/06/2024, 14:54

240609-r9vtpscd639

Analysis

  • max time kernel
    133s
  • max time network
    139s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    09/06/2024, 14:54

General

  • Target
    ransom.exe
  • Size 9.6MB
  • Sample240609-r9vtpscd63
  • SHA256 7a9d65371caadae24c4890655a13de8b452d2a85cac57916e6000576ac5f9f80
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Renames multiple (157) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Loads dropped DLL 24 IoCs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 8 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Using powershell.exe command.

  • Modifies registry key 1 TTPs 2 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 42 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 60 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ransom.exe
    "C:\Users\Admin\AppData\Local\Temp\ransom.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2768
    • C:\Users\Admin\AppData\Local\Temp\ransom.exe
      "C:\Users\Admin\AppData\Local\Temp\ransom.exe"
      2⤵
      • Loads dropped DLL
      • Drops desktop.ini file(s)
      • Suspicious use of WriteProcessMemory
      PID:4400
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c powershell -command Set-Culture en-US
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:5092
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          powershell -command Set-Culture en-US
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1108
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -ExecutionPolicy Bypass -File C:\Users\Admin\AppData\Local\Temp\tmp57ag2p7d\disable_av.ps1
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1972
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\tmp57ag2p7d\kill_av.bat
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2312
        • C:\Windows\system32\net.exe
          net stop "Security Center"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4800
          • C:\Windows\system32\net1.exe
            C:\Windows\system32\net1 stop "Security Center"
            5⤵
              PID:2848
          • C:\Windows\system32\netsh.exe
            netsh firewall set opmode mode=disable
            4⤵
            • Modifies Windows Firewall
            PID:516
          • C:\Windows\system32\tskill.exe
            tskill /A av*
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:2208
          • C:\Windows\system32\tskill.exe
            tskill /A fire*
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:4532
          • C:\Windows\system32\tskill.exe
            tskill /A anti*
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:2176
          • C:\Windows\system32\tskill.exe
            tskill /A spy*
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:1740
          • C:\Windows\system32\tskill.exe
            tskill /A bullguard
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:792
          • C:\Windows\system32\tskill.exe
            tskill /A PersFw
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:2316
          • C:\Windows\system32\tskill.exe
            tskill /A KAV*
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:3016
          • C:\Windows\system32\tskill.exe
            tskill /A ZONEALARM
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:2228
          • C:\Windows\system32\tskill.exe
            tskill /A SAFEWEB
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:4772
          • C:\Windows\system32\tskill.exe
            tskill /A OUTPOST
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:4128
          • C:\Windows\system32\tskill.exe
            tskill /A nv*
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:1612
          • C:\Windows\system32\tskill.exe
            tskill /A nav*
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:5032
          • C:\Windows\system32\tskill.exe
            tskill /A F-*
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:1232
          • C:\Windows\system32\tskill.exe
            tskill /A ESAFE
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:2872
          • C:\Windows\system32\tskill.exe
            tskill /A cle
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:4304
          • C:\Windows\system32\tskill.exe
            tskill /A BLACKICE
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:3300
          • C:\Windows\system32\tskill.exe
            tskill /A def*
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:1228
          • C:\Windows\system32\tskill.exe
            tskill /A ka*
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:1636
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "reg delete HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v "Windows Update" /f"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:4176
          • C:\Windows\system32\reg.exe
            reg delete HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v "Windows Update" /f
            4⤵
            • Modifies registry key
            PID:4804
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v "Windows Update" /t REG_SZ /d C:\Users\Admin\AppData\Roaming\WindowsUpdate\update.bat /f"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:4744
          • C:\Windows\system32\reg.exe
            reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v "Windows Update" /t REG_SZ /d C:\Users\Admin\AppData\Roaming\WindowsUpdate\update.bat /f
            4⤵
            • Adds Run key to start application
            • Modifies registry key
            PID:4932

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          powershell.exe.log

          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
          • Size 2KB
          • SHA256 dcd32b4386d3af7c5bb776f5110a414bd12c8e58160a385db33c018e7f5e1acb
          • MD5 SHA1 SHA512

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 1KB
          • SHA256 53c531cc510a3afca78636b4f8f2ec88d7545f57b28ebb69cf3310e27735fd5f
          • MD5 SHA1 SHA512

          _ctypes.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI27682\_ctypes.pyd
          • Size 116KB
          • SHA256 9ab1f8cbb50db3d9a00f74447a2275a89ec52d1139fc0a93010e59c412c2c850
          • MD5 SHA1 SHA512 SSDEEP

          base_library.zip

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI27682\base_library.zip
          • Size 812KB
          • SHA256 762591f4a42f9dc8b9e9a6c0ed6bd5c3b39875eeacc34a6bf078c18a3e735982
          • MD5 SHA1 SHA512 SSDEEP

          _openssl.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI27682\cryptography\hazmat\bindings\_openssl.pyd
          • Size 3.8MB
          • SHA256 da0dea85eb34de0e50ab1d343d33ed0a99b3af5e2f479d306fce5c0ed604b1d8
          • MD5 SHA1 SHA512 SSDEEP

          _rust.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI27682\cryptography\hazmat\bindings\_rust.pyd
          • Size 1.6MB
          • SHA256 bca2dd906302a6a84e9aa5f41b06c4deef4fee139e861d5c538ba30bd4c40574
          • MD5 SHA1 SHA512 SSDEEP

          python3.DLL

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI27682\python3.DLL
          • Size 60KB
          • SHA256 84a29c369560c5175d22ee764fe8ada882ab6b37b6b10c005404153518a344ec
          • MD5 SHA1 SHA512 SSDEEP

          python310.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI27682\python310.dll
          • Size 4.2MB
          • SHA256 8d0bec69554317ccf1796c505d749d5c9f3be74ccbfce1d9e4d5fe64a536ae9e
          • MD5 SHA1 SHA512 SSDEEP

          unicodedata.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI27682\unicodedata.pyd
          • Size 1.1MB
          • SHA256 09e1d1e9190160959696aeddb0324667fef39f338edc28f49b5f518b92f27f5f
          • MD5 SHA1 SHA512 SSDEEP

          __PSScriptPolicyTest_x0fzscvj.t4p.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_x0fzscvj.t4p.ps1
          • Size 1B
          • SHA256 6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b
          • MD5 SHA1 SHA512

          file_paths.txt

          • Path C:\Users\Admin\AppData\Local\Temp\tmp57ag2p7d\ROBLOX\file_paths.txt
          • Size 4KB
          • SHA256 6b8a1ba87572a6f51f6e796675dea61c180104d4031e93ac153b22402a504345
          • MD5 SHA1 SHA512 SSDEEP

          disable_av.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\tmp57ag2p7d\disable_av.ps1
          • Size 86B
          • SHA256 d1dcccfd275790c7fa06a9a333c49e58326fc92ebfd20bbfd02d933b591e3dd8
          • MD5 SHA1 SHA512

          kill_av.bat

          • Path C:\Users\Admin\AppData\Local\Temp\tmp57ag2p7d\kill_av.bat
          • Size 434B
          • SHA256 957257c8a0c8523912f0ec37b52ae7418129713c2af42b739d19903c599b667a
          • MD5 SHA1 SHA512

          MSVCP140.dll

          • Path \Users\Admin\AppData\Local\Temp\_MEI27682\MSVCP140.dll
          • Size 559KB
          • SHA256 1e57a6df9e3742e31a1c6d9bff81ebeeae8a7de3b45a26e5079d5e1cce54cd98
          • MD5 SHA1 SHA512 SSDEEP

          VCRUNTIME140.dll

          • Path \Users\Admin\AppData\Local\Temp\_MEI27682\VCRUNTIME140.dll
          • Size 94KB
          • SHA256 ded5adaa94341e6c62aea03845762591666381dca30eb7c17261dd154121b83e
          • MD5 SHA1 SHA512 SSDEEP

          VCRUNTIME140_1.dll

          • Path \Users\Admin\AppData\Local\Temp\_MEI27682\VCRUNTIME140_1.dll
          • Size 36KB
          • SHA256 1554b5802968fdb2705a67cbb61585e9560b9e429d043a5aa742ef3c9bbfb6bf
          • MD5 SHA1 SHA512 SSDEEP

          _brotli.cp310-win_amd64.pyd

          • Path \Users\Admin\AppData\Local\Temp\_MEI27682\_brotli.cp310-win_amd64.pyd
          • Size 861KB
          • SHA256 58bacb135729a70102356c2d110651f1735bf40a602858941e13bdeabfacab4a
          • MD5 SHA1 SHA512 SSDEEP

          _bz2.pyd

          • Path \Users\Admin\AppData\Local\Temp\_MEI27682\_bz2.pyd
          • Size 77KB
          • SHA256 0897e209676f5835f62e5985d7793c884fd91b0cfdfaff893fc05176f2f82095
          • MD5 SHA1 SHA512 SSDEEP

          _cffi_backend.cp310-win_amd64.pyd

          • Path \Users\Admin\AppData\Local\Temp\_MEI27682\_cffi_backend.cp310-win_amd64.pyd
          • Size 179KB
          • SHA256 5763c1d29903567cde4d46355d3a7380d10143543986ca4eebfca4d22d991e3e
          • MD5 SHA1 SHA512 SSDEEP

          _hashlib.pyd

          • Path \Users\Admin\AppData\Local\Temp\_MEI27682\_hashlib.pyd
          • Size 59KB
          • SHA256 2e30544d07f1c55d741b03992ea57d1aa519edaaa121e889f301a5b8b6557fe4
          • MD5 SHA1 SHA512 SSDEEP

          _lzma.pyd

          • Path \Users\Admin\AppData\Local\Temp\_MEI27682\_lzma.pyd
          • Size 150KB
          • SHA256 ce72d59a0e96077c9ea3f1fd7b011287248dc8d80fd3c16916a1d9040a9a941f
          • MD5 SHA1 SHA512 SSDEEP

          _queue.pyd

          • Path \Users\Admin\AppData\Local\Temp\_MEI27682\_queue.pyd
          • Size 26KB
          • SHA256 8e7e758150ea066299a956f268c3eb04bc800e9f3395402cd407c486844a9595
          • MD5 SHA1 SHA512 SSDEEP

          _socket.pyd

          • Path \Users\Admin\AppData\Local\Temp\_MEI27682\_socket.pyd
          • Size 73KB
          • SHA256 130de3506471878031aecc4c9d38355a4719edd3786f27262a724efc287a47b9
          • MD5 SHA1 SHA512 SSDEEP

          _ssl.pyd

          • Path \Users\Admin\AppData\Local\Temp\_MEI27682\_ssl.pyd
          • Size 152KB
          • SHA256 5a4c78adedf0bcb5fc422faac619b4c7b57e3d7ba4f2d47a98c1fb81a503b6b7
          • MD5 SHA1 SHA512 SSDEEP

          _bcrypt.pyd

          • Path \Users\Admin\AppData\Local\Temp\_MEI27682\bcrypt\_bcrypt.pyd
          • Size 294KB
          • SHA256 3d1c66bdcb4fa0b8e917895e1b4d62ee14260eaa1bd6fe908877c47585ec6127
          • MD5 SHA1 SHA512 SSDEEP

          libcrypto-1_1.dll

          • Path \Users\Admin\AppData\Local\Temp\_MEI27682\libcrypto-1_1.dll
          • Size 3.3MB
          • SHA256 9c0a0a11629cced6a064932e95a0158ee936739d75a56338702fed97cb0bad55
          • MD5 SHA1 SHA512 SSDEEP

          libffi-7.dll

          • Path \Users\Admin\AppData\Local\Temp\_MEI27682\libffi-7.dll
          • Size 32KB
          • SHA256 f60dd9f2fcbd495674dfc1555effb710eb081fc7d4cae5fa58c438ab50405081
          • MD5 SHA1 SHA512 SSDEEP

          libssl-1_1.dll

          • Path \Users\Admin\AppData\Local\Temp\_MEI27682\libssl-1_1.dll
          • Size 682KB
          • SHA256 ed1c8769f5096afd000fc730a37b11177fcf90890345071ab7fbceac684d571f
          • MD5 SHA1 SHA512 SSDEEP

          select.pyd

          • Path \Users\Admin\AppData\Local\Temp\_MEI27682\select.pyd
          • Size 25KB
          • SHA256 cb643556c2dcdb957137b25c8a33855067e0d07547e547587c9886238253bfe5
          • MD5 SHA1 SHA512 SSDEEP

          memory/1108-97-0x00007FFD0B760000-0x00007FFD0C14C000-memory.dmp

          memory/1108-96-0x0000018A6C800000-0x0000018A6C876000-memory.dmp

          memory/1108-141-0x00007FFD0B760000-0x00007FFD0C14C000-memory.dmp

          memory/1108-95-0x00007FFD0B760000-0x00007FFD0C14C000-memory.dmp

          memory/1108-89-0x00007FFD0B763000-0x00007FFD0B764000-memory.dmp

          memory/1108-92-0x0000018A6C480000-0x0000018A6C4A2000-memory.dmp