Analysis

  • max time kernel
    148s
  • max time network
    137s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    07-05-2021 01:18

General

  • Target

    keygen-step-4.exe

  • Size

    3.3MB

  • MD5

    c679be2fa8a3ab7a239aa742471ba852

  • SHA1

    73ba03c525f2d759bf3c3d60c4a6e1d75cf33031

  • SHA256

    b67bbcbde3ed2da03e506745e4288ef3d328964dbc8eb22f1f198a973020e5b6

  • SHA512

    9f163dd544ee782dfa98a3d5fe2c3b7e85f92e58052b7eaf36989b07bb1eb31890e9ede07a3b990728f815860aa4ae6212c0df8fd91088d3d52eaa34530c2f9b

Malware Config

Signatures

  • PlugX

    PlugX is a RAT (Remote Access Trojan) that has been around since 2008.

  • Executes dropped EXE 6 IoCs
  • UPX packed file 4 IoCs

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

  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Kills process with taskkill 1 IoCs
  • Modifies data under HKEY_USERS 13 IoCs
  • Modifies registry class 12 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 55 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s Themes
    1⤵
      PID:1164
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s WpnService
      1⤵
        PID:2724
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
        1⤵
        • Modifies registry class
        PID:2712
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Browser
        1⤵
          PID:2604
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
          1⤵
            PID:2380
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
            1⤵
              PID:2368
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
              1⤵
                PID:1924
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s SENS
                1⤵
                  PID:1380
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                  1⤵
                    PID:1368
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                    1⤵
                      PID:1112
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                      1⤵
                        PID:344
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                        1⤵
                          PID:996
                        • C:\Users\Admin\AppData\Local\Temp\keygen-step-4.exe
                          "C:\Users\Admin\AppData\Local\Temp\keygen-step-4.exe"
                          1⤵
                          • Suspicious use of WriteProcessMemory
                          PID:2204
                          • C:\Users\Admin\AppData\Local\Temp\RarSFX0\jg6_6asg.exe
                            "C:\Users\Admin\AppData\Local\Temp\RarSFX0\jg6_6asg.exe"
                            2⤵
                            • Executes dropped EXE
                            • Checks whether UAC is enabled
                            • Suspicious use of AdjustPrivilegeToken
                            PID:1524
                          • C:\Users\Admin\AppData\Local\Temp\RarSFX0\askinstall20.exe
                            "C:\Users\Admin\AppData\Local\Temp\RarSFX0\askinstall20.exe"
                            2⤵
                            • Executes dropped EXE
                            • Modifies system certificate store
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of WriteProcessMemory
                            PID:3496
                            • C:\Windows\SysWOW64\cmd.exe
                              cmd.exe /c taskkill /f /im chrome.exe
                              3⤵
                              • Suspicious use of WriteProcessMemory
                              PID:3784
                              • C:\Windows\SysWOW64\taskkill.exe
                                taskkill /f /im chrome.exe
                                4⤵
                                • Kills process with taskkill
                                • Suspicious use of AdjustPrivilegeToken
                                PID:988
                          • C:\Users\Admin\AppData\Local\Temp\RarSFX0\Full Version.exe
                            "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Full Version.exe"
                            2⤵
                            • Executes dropped EXE
                            • Suspicious use of SetWindowsHookEx
                            • Suspicious use of WriteProcessMemory
                            PID:3408
                            • C:\Windows\SysWOW64\rundll32.exe
                              "C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\install.dll",install
                              3⤵
                              • Loads dropped DLL
                              • Modifies registry class
                              • Suspicious behavior: EnumeratesProcesses
                              • Suspicious use of AdjustPrivilegeToken
                              • Suspicious use of WriteProcessMemory
                              PID:1968
                          • C:\Users\Admin\AppData\Local\Temp\RarSFX0\gcttt.exe
                            "C:\Users\Admin\AppData\Local\Temp\RarSFX0\gcttt.exe"
                            2⤵
                            • Executes dropped EXE
                            • Adds Run key to start application
                            • Suspicious use of WriteProcessMemory
                            PID:1788
                            • C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
                              C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe /scookiestxt C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
                              3⤵
                              • Executes dropped EXE
                              PID:296
                            • C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
                              C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe /scookiestxt C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
                              3⤵
                              • Executes dropped EXE
                              • Suspicious behavior: EnumeratesProcesses
                              PID:4264
                        • \??\c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s BITS
                          1⤵
                          • Suspicious use of SetThreadContext
                          • Modifies registry class
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious use of AdjustPrivilegeToken
                          • Suspicious use of WriteProcessMemory
                          PID:3896
                          • C:\Windows\system32\svchost.exe
                            C:\Windows\system32\svchost.exe -k SystemNetworkService
                            2⤵
                            • Drops file in System32 directory
                            • Checks processor information in registry
                            • Modifies data under HKEY_USERS
                            • Modifies registry class
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of WriteProcessMemory
                            PID:4084

                        Network

                        MITRE ATT&CK Enterprise v6

                        Replay Monitor

                        Loading Replay Monitor...

                        Downloads

                        • memory/344-239-0x00000224AD310000-0x00000224AD380000-memory.dmp

                          Filesize

                          448KB

                        • memory/344-205-0x00000224ACD70000-0x00000224ACDE0000-memory.dmp

                          Filesize

                          448KB

                        • memory/996-197-0x000001DC55270000-0x000001DC552E0000-memory.dmp

                          Filesize

                          448KB

                        • memory/996-254-0x000001DC55400000-0x000001DC55470000-memory.dmp

                          Filesize

                          448KB

                        • memory/1112-203-0x0000019FE7160000-0x0000019FE71D0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1112-173-0x0000019FE70C0000-0x0000019FE70C2000-memory.dmp

                          Filesize

                          8KB

                        • memory/1112-234-0x0000019FE70C0000-0x0000019FE70C2000-memory.dmp

                          Filesize

                          8KB

                        • memory/1112-236-0x0000019FE7E40000-0x0000019FE7EB0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1164-211-0x0000021100500000-0x0000021100570000-memory.dmp

                          Filesize

                          448KB

                        • memory/1164-181-0x0000021100570000-0x0000021100572000-memory.dmp

                          Filesize

                          8KB

                        • memory/1164-247-0x00000211005F0000-0x0000021100660000-memory.dmp

                          Filesize

                          448KB

                        • memory/1368-249-0x000001583BC20000-0x000001583BC90000-memory.dmp

                          Filesize

                          448KB

                        • memory/1368-213-0x000001583B800000-0x000001583B870000-memory.dmp

                          Filesize

                          448KB

                        • memory/1380-207-0x00000193E1C80000-0x00000193E1CF0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1380-177-0x00000193E15D0000-0x00000193E15D2000-memory.dmp

                          Filesize

                          8KB

                        • memory/1380-242-0x00000193E2340000-0x00000193E23B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1524-119-0x0000000003800000-0x0000000003810000-memory.dmp

                          Filesize

                          64KB

                        • memory/1524-125-0x00000000039A0000-0x00000000039B0000-memory.dmp

                          Filesize

                          64KB

                        • memory/1924-209-0x000001F2A9EB0000-0x000001F2A9F20000-memory.dmp

                          Filesize

                          448KB

                        • memory/1924-245-0x000001F2A9F90000-0x000001F2AA000000-memory.dmp

                          Filesize

                          448KB

                        • memory/1968-188-0x000000000478C000-0x000000000488D000-memory.dmp

                          Filesize

                          1.0MB

                        • memory/1968-189-0x0000000004A00000-0x0000000004A5C000-memory.dmp

                          Filesize

                          368KB

                        • memory/2368-199-0x000001FB60400000-0x000001FB60470000-memory.dmp

                          Filesize

                          448KB

                        • memory/2368-256-0x000001FB60470000-0x000001FB604E0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2380-233-0x0000024F7F2C0000-0x0000024F7F2C2000-memory.dmp

                          Filesize

                          8KB

                        • memory/2380-258-0x0000024F7FCB0000-0x0000024F7FD20000-memory.dmp

                          Filesize

                          448KB

                        • memory/2380-201-0x0000024F7FC40000-0x0000024F7FCB0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2380-171-0x0000024F7F2C0000-0x0000024F7F2C2000-memory.dmp

                          Filesize

                          8KB

                        • memory/2604-240-0x000001CD00840000-0x000001CD008B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2604-193-0x000001CD00310000-0x000001CD00380000-memory.dmp

                          Filesize

                          448KB

                        • memory/2712-215-0x0000023DBEB40000-0x0000023DBEBB0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2712-251-0x0000023DBEF70000-0x0000023DBEFE0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2724-217-0x0000023132F10000-0x0000023132F80000-memory.dmp

                          Filesize

                          448KB

                        • memory/2724-253-0x00000231334B0000-0x0000023133520000-memory.dmp

                          Filesize

                          448KB

                        • memory/3896-225-0x0000027DFB260000-0x0000027DFB264000-memory.dmp

                          Filesize

                          16KB

                        • memory/3896-190-0x0000027DFB530000-0x0000027DFB57B000-memory.dmp

                          Filesize

                          300KB

                        • memory/3896-191-0x0000027DFB5F0000-0x0000027DFB660000-memory.dmp

                          Filesize

                          448KB

                        • memory/3896-229-0x0000027DFB1A0000-0x0000027DFB1A4000-memory.dmp

                          Filesize

                          16KB

                        • memory/3896-227-0x0000027DFB210000-0x0000027DFB214000-memory.dmp

                          Filesize

                          16KB

                        • memory/3896-226-0x0000027DFB210000-0x0000027DFB211000-memory.dmp

                          Filesize

                          4KB

                        • memory/4084-224-0x000002BA5BF90000-0x000002BA5C091000-memory.dmp

                          Filesize

                          1.0MB

                        • memory/4084-196-0x000002BA59A70000-0x000002BA59AE0000-memory.dmp

                          Filesize

                          448KB