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Analysis

  • max time kernel
    1800s
  • max time network
    1800s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    28-04-2021 04:33

General

  • Target

    keygen-step-4.exe

Score
8/10

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 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 2 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 4 IoCs

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

  • Modifies data under HKEY_USERS 16 IoCs
  • Modifies registry class 16 IoCs
  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 62 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
    1⤵
      PID:1100
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s SENS
      1⤵
        PID:1448
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2372
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s WpnService
        1⤵
          PID:2708
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
          1⤵
            PID:2680
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s Browser
            1⤵
              PID:2560
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
              1⤵
                PID:2424
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
                1⤵
                  PID:1872
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                  1⤵
                    PID:1348
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s Themes
                    1⤵
                    • Modifies registry class
                    PID:1316
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                    1⤵
                      PID:912
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                      1⤵
                        PID:1012
                      • 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:3212
                        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe
                          "C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe"
                          2⤵
                          • Executes dropped EXE
                          • Drops file in Program Files directory
                          • Suspicious use of SetWindowsHookEx
                          • Suspicious use of WriteProcessMemory
                          PID:3508
                          • C:\Windows\SysWOW64\rundll32.exe
                            "C:\Windows\System32\rundll32.exe" "C:\Program Files\install.dll",install
                            3⤵
                            • Loads dropped DLL
                            • Modifies registry class
                            • Suspicious behavior: EnumeratesProcesses
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of WriteProcessMemory
                            PID:200
                        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe
                          "C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe"
                          2⤵
                          • Executes dropped EXE
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3752
                          • C:\Windows\system32\WerFault.exe
                            C:\Windows\system32\WerFault.exe -u -p 3752 -s 1596
                            3⤵
                            • Program crash
                            • Suspicious behavior: EnumeratesProcesses
                            • Suspicious use of AdjustPrivilegeToken
                            PID:2256
                      • \??\c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s BITS
                        1⤵
                        • Suspicious use of SetThreadContext
                        • Modifies data under HKEY_USERS
                        • Modifies registry class
                        • Suspicious behavior: EnumeratesProcesses
                        • Suspicious use of AdjustPrivilegeToken
                        • Suspicious use of WriteProcessMemory
                        PID:904
                        • C:\Windows\system32\svchost.exe
                          C:\Windows\system32\svchost.exe -k SystemNetworkService
                          2⤵
                          • Checks processor information in registry
                          • Modifies data under HKEY_USERS
                          • Modifies registry class
                          PID:1492
                        • 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:2384

                      Network

                      MITRE ATT&CK Matrix ATT&CK v6

                      Discovery

                      System Information Discovery

                      2
                      T1082

                      Query Registry

                      1
                      T1012

                      Command and Control

                      Web Service

                      1
                      T1102

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      • C:\Program Files\install.dat
                        MD5

                        806c3221a013fec9530762750556c332

                        SHA1

                        36475bcfd0a18555d7c0413d007bbe80f7d321b5

                        SHA256

                        9bcecc5fb84d21db673c81a7ed1d10b28686b8261f79136f748ab7bbad7752f7

                        SHA512

                        56bbaafe7b0883f4e5dcff00ae69339a3b81ac8ba90b304aeab3e4e7e7523b568fd9b269241fc38a39f74894084f1f252a91c22b79cc0a16f9e135859a13145e

                      • C:\Program Files\install.dll
                        MD5

                        fe60ddbeab6e50c4f490ddf56b52057c

                        SHA1

                        6a71fdf73761a1192fd9c6961f66754a63d6db17

                        SHA256

                        9fcfa73600ff1b588015ffa20779cec6714e48ee6ae15db8766f7ffd5ee3031d

                        SHA512

                        0113b47ba1a33a2f597a26c9b66435483373cde4edb183e0e92abef8ed003743f426ba5ffe25a5807c030cc14d8a95d73aa6af95a85f44a86dd40264ecb96536

                      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe
                        MD5

                        3b1b318df4d314a35dce9e8fd89e5121

                        SHA1

                        55b0f8d56212a74bda0fc5f8cc0632ef52a4bc71

                        SHA256

                        4df9e7fcd10900ae5def897377f54856b0ddad1798fa22614eba56096940885b

                        SHA512

                        f04faca320d344378dd31bf05556fb3ac02873e46e2140d5858162e739f5c25bc9b32d619587c84c36b768b9193ea5292d63f62bb0b8458b35d65959b52df6b4

                      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe
                        MD5

                        3b1b318df4d314a35dce9e8fd89e5121

                        SHA1

                        55b0f8d56212a74bda0fc5f8cc0632ef52a4bc71

                        SHA256

                        4df9e7fcd10900ae5def897377f54856b0ddad1798fa22614eba56096940885b

                        SHA512

                        f04faca320d344378dd31bf05556fb3ac02873e46e2140d5858162e739f5c25bc9b32d619587c84c36b768b9193ea5292d63f62bb0b8458b35d65959b52df6b4

                      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe
                        MD5

                        e72eb3a565d7b5b83c7ff6fad519c6c9

                        SHA1

                        1a2668a26b01828eec1415aa614743abb0a4fb70

                        SHA256

                        8ff1e74643983f7ca9bca70f1bea562e805a86421defde1bd57fc0da3722f599

                        SHA512

                        71ae4db9c307c068f31a4e6471d950d1112d89d5661a4960dffbf6a7343cc313f98cfc35c5a10d38aae68be4b0a3f6a702fd5c28d938ca00094b26d0bcf03da3

                      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe
                        MD5

                        e72eb3a565d7b5b83c7ff6fad519c6c9

                        SHA1

                        1a2668a26b01828eec1415aa614743abb0a4fb70

                        SHA256

                        8ff1e74643983f7ca9bca70f1bea562e805a86421defde1bd57fc0da3722f599

                        SHA512

                        71ae4db9c307c068f31a4e6471d950d1112d89d5661a4960dffbf6a7343cc313f98cfc35c5a10d38aae68be4b0a3f6a702fd5c28d938ca00094b26d0bcf03da3

                      • \Program Files\install.dll
                        MD5

                        fe60ddbeab6e50c4f490ddf56b52057c

                        SHA1

                        6a71fdf73761a1192fd9c6961f66754a63d6db17

                        SHA256

                        9fcfa73600ff1b588015ffa20779cec6714e48ee6ae15db8766f7ffd5ee3031d

                        SHA512

                        0113b47ba1a33a2f597a26c9b66435483373cde4edb183e0e92abef8ed003743f426ba5ffe25a5807c030cc14d8a95d73aa6af95a85f44a86dd40264ecb96536

                      • memory/200-146-0x0000000004719000-0x000000000481A000-memory.dmp
                        Filesize

                        1.0MB

                      • memory/200-119-0x0000000000000000-mapping.dmp
                      • memory/200-148-0x0000000004820000-0x000000000487C000-memory.dmp
                        Filesize

                        368KB

                      • memory/904-153-0x00000147AC150000-0x00000147AC1C0000-memory.dmp
                        Filesize

                        448KB

                      • memory/912-150-0x000001E4B4460000-0x000001E4B44AB000-memory.dmp
                        Filesize

                        300KB

                      • memory/912-210-0x000001E4B4BF0000-0x000001E4B4C61000-memory.dmp
                        Filesize

                        452KB

                      • memory/912-154-0x000001E4B4B10000-0x000001E4B4B80000-memory.dmp
                        Filesize

                        448KB

                      • memory/1012-214-0x000001E6DB8B0000-0x000001E6DB921000-memory.dmp
                        Filesize

                        452KB

                      • memory/1012-170-0x000001E6DB280000-0x000001E6DB2F0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1100-207-0x00000258DF540000-0x00000258DF5B1000-memory.dmp
                        Filesize

                        452KB

                      • memory/1100-147-0x00000258DF030000-0x00000258DF0A0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1316-222-0x000001F058F40000-0x000001F058FB1000-memory.dmp
                        Filesize

                        452KB

                      • memory/1316-173-0x000001F058470000-0x000001F0584E0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1348-227-0x0000022EED520000-0x0000022EED591000-memory.dmp
                        Filesize

                        452KB

                      • memory/1348-179-0x0000022EED100000-0x0000022EED170000-memory.dmp
                        Filesize

                        448KB

                      • memory/1448-215-0x000001A710770000-0x000001A7107E1000-memory.dmp
                        Filesize

                        452KB

                      • memory/1448-160-0x000001A710610000-0x000001A710680000-memory.dmp
                        Filesize

                        448KB

                      • memory/1492-165-0x00000271778D0000-0x0000027177940000-memory.dmp
                        Filesize

                        448KB

                      • memory/1492-131-0x00007FF6A78A4060-mapping.dmp
                      • memory/1872-166-0x0000023E97740000-0x0000023E977B0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1872-219-0x0000023E977B0000-0x0000023E97821000-memory.dmp
                        Filesize

                        452KB

                      • memory/2372-204-0x000001A3B5940000-0x000001A3B59B1000-memory.dmp
                        Filesize

                        452KB

                      • memory/2372-184-0x000001A3B4EE0000-0x000001A3B4F50000-memory.dmp
                        Filesize

                        448KB

                      • memory/2384-197-0x000002015EC00000-0x000002015ECFF000-memory.dmp
                        Filesize

                        1020KB

                      • memory/2384-191-0x00007FF6A78A4060-mapping.dmp
                      • memory/2384-194-0x000002015C330000-0x000002015C37B000-memory.dmp
                        Filesize

                        300KB

                      • memory/2384-195-0x000002015C4C0000-0x000002015C531000-memory.dmp
                        Filesize

                        452KB

                      • memory/2424-223-0x0000018CA4510000-0x0000018CA4581000-memory.dmp
                        Filesize

                        452KB

                      • memory/2424-174-0x0000018CA3F40000-0x0000018CA3FB0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2560-203-0x000001B2752B0000-0x000001B275321000-memory.dmp
                        Filesize

                        452KB

                      • memory/2560-161-0x000001B274C80000-0x000001B274CF0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2680-185-0x0000023A60240000-0x0000023A602B0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2680-229-0x0000023A60940000-0x0000023A609B1000-memory.dmp
                        Filesize

                        452KB

                      • memory/2708-190-0x0000020ED6B70000-0x0000020ED6BE0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2708-233-0x0000020ED6F20000-0x0000020ED6F91000-memory.dmp
                        Filesize

                        452KB

                      • memory/3508-116-0x0000000000000000-mapping.dmp
                      • memory/3752-136-0x0000000000C30000-0x0000000000C4C000-memory.dmp
                        Filesize

                        112KB

                      • memory/3752-130-0x0000000000C20000-0x0000000000C21000-memory.dmp
                        Filesize

                        4KB

                      • memory/3752-141-0x0000000000C50000-0x0000000000C51000-memory.dmp
                        Filesize

                        4KB

                      • memory/3752-126-0x0000000000620000-0x0000000000621000-memory.dmp
                        Filesize

                        4KB

                      • memory/3752-182-0x00000000026D0000-0x00000000026D2000-memory.dmp
                        Filesize

                        8KB

                      • memory/3752-120-0x0000000000000000-mapping.dmp