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Analysis

  • max time kernel
    1792s
  • max time network
    1769s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    28-04-2021 04:33

General

  • Target

    keygen-step-4d.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 14 IoCs
  • Modifies registry class 16 IoCs
  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 29 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 gpsvc
    1⤵
      PID:68
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s Schedule
      1⤵
        PID:1064
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Themes
        1⤵
          PID:1196
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s UserManager
          1⤵
            PID:1288
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s SENS
            1⤵
              PID:1360
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
              1⤵
                PID:2532
              • 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 WpnService
                  1⤵
                  • Modifies registry class
                  PID:2552
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
                  1⤵
                    PID:2236
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
                    1⤵
                      PID:2224
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
                      1⤵
                        PID:1824
                      • C:\Users\Admin\AppData\Local\Temp\keygen-step-4d.exe
                        "C:\Users\Admin\AppData\Local\Temp\keygen-step-4d.exe"
                        1⤵
                        • Suspicious use of WriteProcessMemory
                        PID:1852
                        • 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:3888
                          • 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:1072
                        • 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:2792
                          • C:\Windows\system32\WerFault.exe
                            C:\Windows\system32\WerFault.exe -u -p 2792 -s 1596
                            3⤵
                            • Program crash
                            • Suspicious behavior: EnumeratesProcesses
                            • Suspicious use of AdjustPrivilegeToken
                            PID:2156
                      • \??\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:3920
                        • 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:3524
                        • 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:212
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                        1⤵
                          PID:1104

                        Network

                        MITRE ATT&CK Enterprise v6

                        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/68-213-0x0000021118440000-0x00000211184B1000-memory.dmp

                          Filesize

                          452KB

                        • memory/68-157-0x00000211183D0000-0x0000021118440000-memory.dmp

                          Filesize

                          448KB

                        • memory/212-194-0x000001E4E21F0000-0x000001E4E223B000-memory.dmp

                          Filesize

                          300KB

                        • memory/212-191-0x00007FF7ED0D4060-mapping.dmp

                        • memory/212-195-0x000001E4E2380000-0x000001E4E23F1000-memory.dmp

                          Filesize

                          452KB

                        • memory/212-197-0x000001E4E4B00000-0x000001E4E4BFF000-memory.dmp

                          Filesize

                          1020KB

                        • memory/1064-221-0x000001FC35600000-0x000001FC35671000-memory.dmp

                          Filesize

                          452KB

                        • memory/1064-151-0x000001FC35340000-0x000001FC353B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1072-134-0x00000000005FD000-0x00000000006FE000-memory.dmp

                          Filesize

                          1.0MB

                        • memory/1072-136-0x00000000040F0000-0x000000000414C000-memory.dmp

                          Filesize

                          368KB

                        • memory/1072-119-0x0000000000000000-mapping.dmp

                        • memory/1104-145-0x000001BC6AE90000-0x000001BC6AF00000-memory.dmp

                          Filesize

                          448KB

                        • memory/1104-219-0x000001BC6B420000-0x000001BC6B491000-memory.dmp

                          Filesize

                          452KB

                        • memory/1196-169-0x00000238488A0000-0x0000023848910000-memory.dmp

                          Filesize

                          448KB

                        • memory/1196-227-0x0000023848E40000-0x0000023848EB1000-memory.dmp

                          Filesize

                          452KB

                        • memory/1288-229-0x000001739DA40000-0x000001739DAB1000-memory.dmp

                          Filesize

                          452KB

                        • memory/1288-177-0x000001739D460000-0x000001739D4D0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1360-158-0x000002F47C540000-0x000002F47C5B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1360-223-0x000002F47CB10000-0x000002F47CB81000-memory.dmp

                          Filesize

                          452KB

                        • memory/1824-162-0x00000153D4C60000-0x00000153D4CD0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1824-225-0x00000153D5240000-0x00000153D52B1000-memory.dmp

                          Filesize

                          452KB

                        • memory/2224-166-0x0000015446040000-0x00000154460B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2224-215-0x0000015446120000-0x0000015446191000-memory.dmp

                          Filesize

                          452KB

                        • memory/2236-139-0x0000021307020000-0x0000021307090000-memory.dmp

                          Filesize

                          448KB

                        • memory/2236-217-0x0000021307B40000-0x0000021307BB1000-memory.dmp

                          Filesize

                          452KB

                        • memory/2532-231-0x000001789BC00000-0x000001789BC71000-memory.dmp

                          Filesize

                          452KB

                        • memory/2532-179-0x000001789B740000-0x000001789B7B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2552-233-0x000002814ABB0000-0x000002814AC21000-memory.dmp

                          Filesize

                          452KB

                        • memory/2552-181-0x000002814AB40000-0x000002814ABB0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2560-211-0x0000028C6EB40000-0x0000028C6EBB1000-memory.dmp

                          Filesize

                          452KB

                        • memory/2560-150-0x0000028C6E5A0000-0x0000028C6E610000-memory.dmp

                          Filesize

                          448KB

                        • memory/2792-185-0x00000000004F0000-0x00000000004F1000-memory.dmp

                          Filesize

                          4KB

                        • memory/2792-182-0x0000000000000000-mapping.dmp

                        • memory/2792-188-0x0000000000A20000-0x0000000000A3C000-memory.dmp

                          Filesize

                          112KB

                        • memory/2792-187-0x0000000000A10000-0x0000000000A11000-memory.dmp

                          Filesize

                          4KB

                        • memory/2792-190-0x000000001B050000-0x000000001B052000-memory.dmp

                          Filesize

                          8KB

                        • memory/2792-189-0x0000000000A50000-0x0000000000A51000-memory.dmp

                          Filesize

                          4KB

                        • memory/3524-152-0x0000025696000000-0x0000025696070000-memory.dmp

                          Filesize

                          448KB

                        • memory/3524-125-0x00007FF7ED0D4060-mapping.dmp

                        • memory/3888-116-0x0000000000000000-mapping.dmp

                        • memory/3920-140-0x0000021FF6AC0000-0x0000021FF6B30000-memory.dmp

                          Filesize

                          448KB

                        • memory/3920-138-0x0000021FF6A00000-0x0000021FF6A4B000-memory.dmp

                          Filesize

                          300KB

                        • memory/3920-124-0x0000021FF6720000-0x0000021FF6722000-memory.dmp

                          Filesize

                          8KB