Overview

overview

10

Static

static

3

samples4.zip

windows7-x64

1

samples4.zip

windows10-2004-x64

1

0e60d49a96...01.exe

windows7-x64

0e60d49a96...01.exe

windows10-2004-x64

1ce5dd21fb...1e.exe

windows7-x64

10

1ce5dd21fb...1e.exe

windows10-2004-x64

10

3c73425d02...e6.exe

windows7-x64

6

3c73425d02...e6.exe

windows10-2004-x64

6

5df6314b5c...5b.exe

windows7-x64

10

5df6314b5c...5b.exe

windows10-2004-x64

10

5ee5166c02...93.exe

windows7-x64

10

5ee5166c02...93.exe

windows10-2004-x64

10

5f7cdd8c28...02.exe

windows7-x64

7

5f7cdd8c28...02.exe

windows10-2004-x64

7

Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/01/2024, 15:38

Sharing

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General

  • Target
    5ee5166c02636f294fb8f6da69d5c0ae893a1c4694ae1bcc3753b497598121a0/5ee5166c02636f294fb8f6da69d5c0ae893.exe
  • Size 2.2MB
  • Sample240101-s2944adcem
  • SHA256 5ee5166c02636f294fb8f6da69d5c0ae893a1c4694ae1bcc3753b497598121a0
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
ctblockerransomware

Malware Config

Extracted

Path

  • C:\ProgramData\lcrueog.html

Ransom Note
  • Your documents, photos, databases and other important files have been encrypted with strongest encryption and unique key, generated for this computer. Private decryption key is stored on a secret Internet server and nobody can decrypt your files until you pay and obtain the private key. If you see the main locker window, follow the instructions on the locker. Overwise, it's seems that you or your antivirus deleted the locker program. Now you have the last chance to decrypt your files. Open http://jssestaew3e7ao3q.onion.cab or http://jssestaew3e7ao3q.tor2web.org in your browser. They are public gates to the secret server. If you have problems with gates, use direct connection: 1. Download Tor Browser from http://torproject.org. 2. In the Tor Browser open the http://jssestaew3e7ao3q.onion Note that this server is available via Tor Browser only. Retry in 1 hour if site is not reachable. Copy and paste the following public key in the input form on server. Avoid missprints. Follow the instructions on the server. The list of your encrypted files: Path File
URLs

  • http://jssestaew3e7ao3q.onion.cab

  • http://jssestaew3e7ao3q.tor2web.org

  • http://jssestaew3e7ao3q.onion

Signatures

  • CTB-Locker

    Ransomware family which uses Tor to hide its C2 communications.

    ransomwarectblocker
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Drops desktop.ini file(s) 2 IoCs
  • Enumerates connected drives 3 TTPs 1 IoCs

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

  • Drops file in System32 directory 5 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
    ransomware
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
    adwarespyware
  • Modifies data under HKEY_USERS 23 IoCs
  • Modifies registry class 35 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Sets desktop wallpaper using registry
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of UnmapMainImage
    PID:3560
    • C:\Users\Admin\AppData\Local\Temp\5ee5166c02636f294fb8f6da69d5c0ae893a1c4694ae1bcc3753b497598121a0\5ee5166c02636f294fb8f6da69d5c0ae893.exe
      "C:\Users\Admin\AppData\Local\Temp\5ee5166c02636f294fb8f6da69d5c0ae893a1c4694ae1bcc3753b497598121a0\5ee5166c02636f294fb8f6da69d5c0ae893.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:3264
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k DcomLaunch -p
    1⤵
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:804
    • C:\Windows\system32\wbem\wmiprvse.exe
      C:\Windows\system32\wbem\wmiprvse.exe -secured -Embedding
      2⤵
        PID:2292
      • C:\Windows\system32\DllHost.exe
        C:\Windows\system32\DllHost.exe /Processid:{AB8902B4-09CA-4BB6-B78D-A8F59079A8D5}
        2⤵
          PID:4880
        • C:\Windows\System32\mousocoreworker.exe
          C:\Windows\System32\mousocoreworker.exe -Embedding
          2⤵
            PID:2260
          • C:\Windows\system32\backgroundTaskHost.exe
            "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
            2⤵
              PID:2624
            • C:\Windows\system32\backgroundTaskHost.exe
              "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
              2⤵
                PID:3416
              • C:\Windows\system32\backgroundTaskHost.exe
                "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
                2⤵
                  PID:2492
                • C:\Windows\system32\BackgroundTransferHost.exe
                  "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1
                  2⤵
                    PID:4896
                  • C:\Windows\system32\BackgroundTransferHost.exe
                    "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1
                    2⤵
                      PID:180
                    • C:\Windows\system32\backgroundTaskHost.exe
                      "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
                      2⤵
                        PID:5088
                      • C:\Windows\system32\BackgroundTaskHost.exe
                        "C:\Windows\system32\BackgroundTaskHost.exe" -ServerName:BackgroundTaskHost.WebAccountProvider
                        2⤵
                          PID:1420
                      • C:\Users\Admin\AppData\Local\Temp\pcftxel.exe
                        C:\Users\Admin\AppData\Local\Temp\pcftxel.exe
                        1⤵
                        • Executes dropped EXE
                        • Suspicious behavior: EnumeratesProcesses
                        • Suspicious use of AdjustPrivilegeToken
                        • Suspicious use of WriteProcessMemory
                        PID:1192
                        • C:\Users\Admin\AppData\Local\Temp\pcftxel.exe
                          "C:\Users\Admin\AppData\Local\Temp\pcftxel.exe" -u
                          2⤵
                          • Checks computer location settings
                          • Executes dropped EXE
                          • Drops file in System32 directory
                          • Modifies Internet Explorer settings
                          • Suspicious use of FindShellTrayWindow
                          • Suspicious use of SendNotifyMessage
                          • Suspicious use of SetWindowsHookEx
                          PID:4372
                        • C:\Windows\SysWOW64\WerFault.exe
                          C:\Windows\SysWOW64\WerFault.exe -u -p 1192 -s 728
                          2⤵
                          • Program crash
                          PID:1580
                      • C:\Windows\SysWOW64\WerFault.exe
                        C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1192 -ip 1192
                        1⤵
                          PID:3416

                        Network

                              MITRE ATT&CK Enterprise v15

                              Replay Monitor

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                              Downloads

                              csllzaa
                              • Path C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\csllzaa
                              • Size 654B
                              • SHA256 8710149afed5be5d1411ff22b402f9a68dd5cf738170b681c86274f7dfcf83d2
                              • MD5 SHA1 SHA512
                              Submit Download

                              csllzaa
                              • Path C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\csllzaa
                              • Size 654B
                              • SHA256 f488b40901536fe9404befeba5688422355e69a0da99114722ed604da67786a0
                              • MD5 SHA1 SHA512
                              Submit Download

                              csllzaa
                              • Path C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\csllzaa
                              • Size 654B
                              • SHA256 fd412ca09aab8b87e7954f61f5da678f4e6e96aa24428bc4ff8916636dd14ca2
                              • MD5 SHA1 SHA512
                              Submit Download

                              csllzaa
                              • Path C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\csllzaa
                              • Size 654B
                              • SHA256 c7bac4e7254ec928ffead5688dca22f9c3b6ec86759b167e61628a48f3c01244
                              • MD5 SHA1 SHA512
                              Submit Download

                              csllzaa
                              • Path C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\csllzaa
                              • Size 654B
                              • SHA256 d4bbc984d19458e1242956cb6408ee77cdc05cfda94c4fdb96fba12d3325bc3a
                              • MD5 SHA1 SHA512
                              Submit Download

                              lcrueog.html
                              • Path C:\ProgramData\lcrueog.html
                              • Size 92KB
                              • SHA256 d007458ab4b6c924f0ca12b3cc924f3bf2857e0489331eb387cc332c953f360b
                              • MD5 SHA1 SHA512 SSDEEP
                              Submit Download

                              pcftxel.exe
                              • Path C:\Users\Admin\AppData\Local\Temp\pcftxel.exe
                              • Size 1.0MB
                              • SHA256 5d182cd219ec791fe2d9ee46b141f003baef4b88c0d6c274f1cb1b977690caa2
                              • MD5 SHA1 SHA512 SSDEEP
                              Submit Download

                              pcftxel.exe
                              • Path C:\Users\Admin\AppData\Local\Temp\pcftxel.exe
                              • Size 1.4MB
                              • SHA256 6263719feef138c624bf4df8e331da67860a643396a20b79a03306b3af072174
                              • MD5 SHA1 SHA512 SSDEEP
                              Submit Download

                              pcftxel.exe
                              • Path C:\Users\Admin\AppData\Local\Temp\pcftxel.exe
                              • Size 857KB
                              • SHA256 ffb9a1270f7cd52e77d473966c4009203452090a1a5d091abc419e5f137d085d
                              • MD5 SHA1 SHA512 SSDEEP
                              Submit Download

                              CachedImage_1280_720_POS4.JPG.eayftga
                              • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Themes\CachedFiles\CachedImage_1280_720_POS4.JPG.eayftga
                              • Size 36KB
                              • SHA256 99f0bd0f94bf510c4f7813a84184bafa0df786709c28542abb561170d8669c4f
                              • MD5 SHA1 SHA512 SSDEEP
                              Submit Download

                              desktop.ini
                              • Path F:\$RECYCLE.BIN\S-1-5-18\desktop.ini
                              • Size 129B
                              • SHA256 e1b9ce9b57957b1a0607a72a057d6b7a9b34ea60f3f8aa8f38a3af979bd23066
                              • MD5 SHA1 SHA512
                              Submit Download

                              memory/804-19-0x000000000C6D0000-0x000000000C747000-memory.dmp
                              Download

                              memory/804-17-0x000000000C6D0000-0x000000000C747000-memory.dmp
                              Download

                              memory/804-22-0x000000000C6D0000-0x000000000C747000-memory.dmp
                              Download

                              memory/804-248-0x000000000C6D0000-0x000000000C747000-memory.dmp
                              Download

                              memory/804-13-0x000000000C6D0000-0x000000000C747000-memory.dmp
                              Download

                              memory/804-14-0x000000000C6D0000-0x000000000C747000-memory.dmp
                              Download

                              memory/804-3373-0x000000000C6D0000-0x000000000C747000-memory.dmp
                              Download

                              memory/804-11-0x000000000C6D0000-0x000000000C747000-memory.dmp
                              Download

                              memory/804-21-0x000000000C6D0000-0x000000000C747000-memory.dmp
                              Download

                              memory/1192-3385-0x0000000001930000-0x0000000001B7B000-memory.dmp
                              Download

                              memory/1192-8-0x0000000001930000-0x0000000001B7B000-memory.dmp
                              Download

                              memory/3264-0-0x0000000000BE0000-0x0000000000DFA000-memory.dmp
                              Download

                              memory/3264-2-0x0000000000E00000-0x000000000104B000-memory.dmp
                              Download

                              memory/3264-1-0x00000000005D0000-0x00000000005D1000-memory.dmp
                              Download

                              memory/4372-3405-0x0000000000FD0000-0x000000000121B000-memory.dmp
                              Download

                              memory/4372-3406-0x0000000000FD0000-0x000000000121B000-memory.dmp
                              Download