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Analysis

  • max time kernel
    1792s
  • max time network
    1797s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    28-04-2021 13:56

General

  • Target

    keygen-step-4d.exe

  • Size

    4.6MB

  • MD5

    563107b1df2a00f4ec868acd9e08a205

  • SHA1

    9cb9c91d66292f5317aa50d92e38834861e9c9b7

  • SHA256

    bf2bd257dde4921ce83c7c1303fafe7f9f81e53c2775d3c373ced482b22eb8a9

  • SHA512

    99a8d247fa435c4cd95be7bc64c7dd6e382371f3a3c160aac3995fd705e4fd3f6622c23784a4ae3457c87536347d15eda3f08aa616450778a99376df540d74d1

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
  • Suspicious use of SetThreadContext 1 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 2 IoCs

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

  • Modifies data under HKEY_USERS 5 IoCs
  • Modifies registry class 12 IoCs
  • Suspicious behavior: EnumeratesProcesses 21 IoCs
  • Suspicious use of AdjustPrivilegeToken 44 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 47 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
    1⤵
    • Modifies registry class
    PID:340
  • 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 Themes
      1⤵
        PID:1276
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s SENS
        1⤵
        • Modifies registry class
        PID:1436
      • 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 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 Browser
              1⤵
                PID:2688
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
                1⤵
                  PID:2508
                • 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 IKEEXT
                  1⤵
                    PID:2360
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
                    1⤵
                      PID:1900
                    • 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: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:2756
                        • 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:3560
                      • 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:2580
                        • C:\Windows\system32\WerFault.exe
                          C:\Windows\system32\WerFault.exe -u -p 2580 -s 1596
                          3⤵
                          • Program crash
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious use of AdjustPrivilegeToken
                          PID:636
                    • \??\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:3968
                      • 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
                        • Suspicious use of AdjustPrivilegeToken
                        • Suspicious use of WriteProcessMemory
                        PID:2072

                    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/340-173-0x000001E8EF760000-0x000001E8EF7D0000-memory.dmp
                      Filesize

                      448KB

                    • memory/340-211-0x000001E8EFE40000-0x000001E8EFEB0000-memory.dmp
                      Filesize

                      448KB

                    • memory/1032-154-0x000001DCEFA60000-0x000001DCEFAD0000-memory.dmp
                      Filesize

                      448KB

                    • memory/1032-219-0x000001DCF0140000-0x000001DCF01B0000-memory.dmp
                      Filesize

                      448KB

                    • memory/1092-243-0x000001D848B40000-0x000001D848BB0000-memory.dmp
                      Filesize

                      448KB

                    • memory/1092-189-0x000001D848570000-0x000001D8485E0000-memory.dmp
                      Filesize

                      448KB

                    • memory/1092-217-0x000001D8485E0000-0x000001D848650000-memory.dmp
                      Filesize

                      448KB

                    • memory/1276-225-0x0000020FAD3B0000-0x0000020FAD420000-memory.dmp
                      Filesize

                      448KB

                    • memory/1276-169-0x0000020FAD340000-0x0000020FAD3B0000-memory.dmp
                      Filesize

                      448KB

                    • memory/1344-176-0x000001AFC0120000-0x000001AFC0190000-memory.dmp
                      Filesize

                      448KB

                    • memory/1344-227-0x000001AFC0640000-0x000001AFC06B0000-memory.dmp
                      Filesize

                      448KB

                    • memory/1436-221-0x000002AD457B0000-0x000002AD45820000-memory.dmp
                      Filesize

                      448KB

                    • memory/1436-159-0x000002AD45140000-0x000002AD451B0000-memory.dmp
                      Filesize

                      448KB

                    • memory/1900-223-0x0000015957C10000-0x0000015957C80000-memory.dmp
                      Filesize

                      448KB

                    • memory/1900-164-0x0000015957BA0000-0x0000015957C10000-memory.dmp
                      Filesize

                      448KB

                    • memory/2072-135-0x00007FF6CA784060-mapping.dmp
                    • memory/2072-170-0x000001D191E70000-0x000001D191EE0000-memory.dmp
                      Filesize

                      448KB

                    • memory/2360-213-0x000002806CC90000-0x000002806CD00000-memory.dmp
                      Filesize

                      448KB

                    • memory/2360-237-0x000002806CD70000-0x000002806CDE0000-memory.dmp
                      Filesize

                      448KB

                    • memory/2360-181-0x000002806CBB0000-0x000002806CC20000-memory.dmp
                      Filesize

                      448KB

                    • memory/2372-215-0x00000253F98B0000-0x00000253F9920000-memory.dmp
                      Filesize

                      448KB

                    • memory/2372-240-0x00000253F9920000-0x00000253F9990000-memory.dmp
                      Filesize

                      448KB

                    • memory/2372-187-0x00000253F9840000-0x00000253F98B0000-memory.dmp
                      Filesize

                      448KB

                    • memory/2508-180-0x000001B9DB430000-0x000001B9DB4A0000-memory.dmp
                      Filesize

                      448KB

                    • memory/2508-229-0x000001B9DC000000-0x000001B9DC070000-memory.dmp
                      Filesize

                      448KB

                    • memory/2524-186-0x000001DC1BE80000-0x000001DC1BEF0000-memory.dmp
                      Filesize

                      448KB

                    • memory/2524-231-0x000001DC1C410000-0x000001DC1C480000-memory.dmp
                      Filesize

                      448KB

                    • memory/2580-123-0x0000000000000000-mapping.dmp
                    • memory/2580-129-0x0000000001310000-0x0000000001311000-memory.dmp
                      Filesize

                      4KB

                    • memory/2580-148-0x000000001BB30000-0x000000001BB32000-memory.dmp
                      Filesize

                      8KB

                    • memory/2580-127-0x0000000000DF0000-0x0000000000DF1000-memory.dmp
                      Filesize

                      4KB

                    • memory/2580-131-0x0000000001340000-0x0000000001341000-memory.dmp
                      Filesize

                      4KB

                    • memory/2580-130-0x0000000001320000-0x000000000133C000-memory.dmp
                      Filesize

                      112KB

                    • memory/2688-234-0x000002A38C0B0000-0x000002A38C120000-memory.dmp
                      Filesize

                      448KB

                    • memory/2688-209-0x000002A38BB70000-0x000002A38BBE0000-memory.dmp
                      Filesize

                      448KB

                    • memory/2688-163-0x000002A38BAA0000-0x000002A38BB10000-memory.dmp
                      Filesize

                      448KB

                    • memory/2756-116-0x0000000000000000-mapping.dmp
                    • memory/3560-126-0x000000000301A000-0x000000000311B000-memory.dmp
                      Filesize

                      1.0MB

                    • memory/3560-132-0x0000000003120000-0x000000000317C000-memory.dmp
                      Filesize

                      368KB

                    • memory/3560-119-0x0000000000000000-mapping.dmp
                    • memory/3968-192-0x000002A636510000-0x000002A636511000-memory.dmp
                      Filesize

                      4KB

                    • memory/3968-193-0x000002A636510000-0x000002A636514000-memory.dmp
                      Filesize

                      16KB

                    • memory/3968-191-0x000002A6365E0000-0x000002A6365E4000-memory.dmp
                      Filesize

                      16KB

                    • memory/3968-195-0x000002A6343F0000-0x000002A6343F4000-memory.dmp
                      Filesize

                      16KB

                    • memory/3968-150-0x000002A6368B0000-0x000002A6368FB000-memory.dmp
                      Filesize

                      300KB

                    • memory/3968-152-0x000002A636970000-0x000002A6369E0000-memory.dmp
                      Filesize

                      448KB