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Analysis

  • max time kernel
    586s
  • max time network
    588s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    09-05-2021 23:24

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 13 IoCs
  • Modifies registry class 16 IoCs
  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 38 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 Themes
    1⤵
      PID:1276
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s UserManager
      1⤵
        PID:1344
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
        1⤵
          PID:2360
        • 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 ShellHWDetection
          1⤵
            PID:1900
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s SENS
            1⤵
              PID:1436
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
              1⤵
                PID:1092
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                1⤵
                  PID:1032
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s WpnService
                  1⤵
                    PID:2524
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
                    1⤵
                    • Modifies registry class
                    PID:2508
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s Browser
                    1⤵
                      PID:2688
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                      1⤵
                        PID:340
                      • 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:584
                        • 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:3028
                          • 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:1448
                        • 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:3356
                          • C:\Windows\system32\WerFault.exe
                            C:\Windows\system32\WerFault.exe -u -p 3356 -s 1600
                            3⤵
                            • Program crash
                            • Suspicious behavior: EnumeratesProcesses
                            • Suspicious use of AdjustPrivilegeToken
                            PID:3940
                      • \??\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:3952
                        • 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:2212
                        • 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:3744

                      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/340-218-0x000001E8EFE40000-0x000001E8EFEB0000-memory.dmp
                        Filesize

                        448KB

                      • memory/340-170-0x000001E8EF760000-0x000001E8EF7D0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1032-178-0x000001DCEFA60000-0x000001DCEFAD0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1032-226-0x000001DCF0140000-0x000001DCF01B0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1092-176-0x000001D848570000-0x000001D8485E0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1092-224-0x000001D8485E0000-0x000001D848650000-memory.dmp
                        Filesize

                        448KB

                      • memory/1276-184-0x0000020FAD340000-0x0000020FAD3B0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1276-232-0x0000020FAD3B0000-0x0000020FAD420000-memory.dmp
                        Filesize

                        448KB

                      • memory/1344-186-0x000001AFC0120000-0x000001AFC0190000-memory.dmp
                        Filesize

                        448KB

                      • memory/1344-234-0x000001AFC0640000-0x000001AFC06B0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1436-228-0x000002AD457B0000-0x000002AD45820000-memory.dmp
                        Filesize

                        448KB

                      • memory/1436-180-0x000002AD45140000-0x000002AD451B0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1448-133-0x0000000000B10000-0x0000000000B6C000-memory.dmp
                        Filesize

                        368KB

                      • memory/1448-119-0x0000000000000000-mapping.dmp
                      • memory/1448-123-0x0000000000C25000-0x0000000000D26000-memory.dmp
                        Filesize

                        1.0MB

                      • memory/1900-230-0x0000015957C10000-0x0000015957C80000-memory.dmp
                        Filesize

                        448KB

                      • memory/1900-182-0x0000015957BA0000-0x0000015957C10000-memory.dmp
                        Filesize

                        448KB

                      • memory/2212-169-0x000001E94F040000-0x000001E94F0B0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2212-136-0x00007FF6CA784060-mapping.dmp
                      • memory/2360-172-0x000002806CBB0000-0x000002806CC20000-memory.dmp
                        Filesize

                        448KB

                      • memory/2360-220-0x000002806CC90000-0x000002806CD00000-memory.dmp
                        Filesize

                        448KB

                      • memory/2372-174-0x00000253F9840000-0x00000253F98B0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2372-222-0x00000253F98B0000-0x00000253F9920000-memory.dmp
                        Filesize

                        448KB

                      • memory/2508-236-0x000001B9DBF00000-0x000001B9DBF70000-memory.dmp
                        Filesize

                        448KB

                      • memory/2508-188-0x000001B9DB430000-0x000001B9DB4A0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2524-238-0x000001DC1C410000-0x000001DC1C480000-memory.dmp
                        Filesize

                        448KB

                      • memory/2524-190-0x000001DC1BE80000-0x000001DC1BEF0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2688-216-0x000002A38BB70000-0x000002A38BBE0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2688-166-0x000002A38BAA0000-0x000002A38BB10000-memory.dmp
                        Filesize

                        448KB

                      • memory/3028-116-0x0000000000000000-mapping.dmp
                      • memory/3356-130-0x0000000001280000-0x000000000129C000-memory.dmp
                        Filesize

                        112KB

                      • memory/3356-132-0x00000000015C0000-0x00000000015C2000-memory.dmp
                        Filesize

                        8KB

                      • memory/3356-124-0x0000000000000000-mapping.dmp
                      • memory/3356-127-0x0000000000C60000-0x0000000000C61000-memory.dmp
                        Filesize

                        4KB

                      • memory/3356-129-0x0000000001270000-0x0000000001271000-memory.dmp
                        Filesize

                        4KB

                      • memory/3356-131-0x00000000012A0000-0x00000000012A1000-memory.dmp
                        Filesize

                        4KB

                      • memory/3744-197-0x0000021C6A800000-0x0000021C6A904000-memory.dmp
                        Filesize

                        1.0MB

                      • memory/3744-194-0x0000021C67EF0000-0x0000021C67F3B000-memory.dmp
                        Filesize

                        300KB

                      • memory/3744-191-0x00007FF6CA784060-mapping.dmp
                      • memory/3744-195-0x0000021C681D0000-0x0000021C68240000-memory.dmp
                        Filesize

                        448KB

                      • memory/3952-164-0x0000027D59A80000-0x0000027D59AF0000-memory.dmp
                        Filesize

                        448KB

                      • memory/3952-163-0x0000027D599C0000-0x0000027D59A0B000-memory.dmp
                        Filesize

                        300KB

                      • memory/3952-135-0x0000027D596E0000-0x0000027D596E2000-memory.dmp
                        Filesize

                        8KB

                      • memory/3952-198-0x0000027D596F0000-0x0000027D596F4000-memory.dmp
                        Filesize

                        16KB

                      • memory/3952-202-0x0000027D59600000-0x0000027D59604000-memory.dmp
                        Filesize

                        16KB

                      • memory/3952-200-0x0000027D596A0000-0x0000027D596A4000-memory.dmp
                        Filesize

                        16KB

                      • memory/3952-199-0x0000027D596A0000-0x0000027D596A1000-memory.dmp
                        Filesize

                        4KB