Resubmissions

24-04-2021 20:28

210424-hdvwe2nvza 10

24-04-2021 19:13

210424-ybjq8yj7ej 10

24-04-2021 19:13

210424-lbec8bsxas 10

24-04-2021 19:13

210424-p1q7nfdl5n 10

24-04-2021 19:13

210424-zsvmftzny6 10

24-04-2021 15:54

210424-bvebvx5d4j 10

24-04-2021 08:51

210424-fycslxztl2 10

24-04-2021 06:48

210424-dpw71r8bwa 10

Analysis

  • max time kernel
    1801s
  • max time network
    1445s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    24-04-2021 19:13

General

  • Target

    keygen-step-4.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
  • 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
  • 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 13 IoCs
  • Modifies registry class 12 IoCs
  • Suspicious behavior: EnumeratesProcesses 21 IoCs
  • Suspicious use of AdjustPrivilegeToken 28 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
    1⤵
      PID:2692
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s WpnService
      1⤵
        PID:2672
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Browser
        1⤵
          PID:2596
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
          1⤵
            PID:2380
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
            1⤵
              PID:2364
            • 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:1892
              • 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:2840
                • 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:3028
              • 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:2356
                • C:\Windows\system32\WerFault.exe
                  C:\Windows\system32\WerFault.exe -u -p 2356 -s 1612
                  3⤵
                  • Program crash
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2504
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
              1⤵
                PID:1852
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s SENS
                1⤵
                  PID:1416
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                  1⤵
                  • Modifies registry class
                  PID:1396
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s Themes
                  1⤵
                    PID:1204
                  • \??\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:1968
                    • 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:3612
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                    1⤵
                      PID:1164
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                      1⤵
                        PID:1040
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                        1⤵
                          PID:1000

                        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/1000-169-0x000001EE5E830000-0x000001EE5E8A0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1000-213-0x000001EE5EF70000-0x000001EE5EFE0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1040-190-0x000001AB154B0000-0x000001AB15520000-memory.dmp

                          Filesize

                          448KB

                        • memory/1040-221-0x000001AB15520000-0x000001AB15590000-memory.dmp

                          Filesize

                          448KB

                        • memory/1164-219-0x000001EAD7970000-0x000001EAD79E0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1164-188-0x000001EAD71D0000-0x000001EAD7240000-memory.dmp

                          Filesize

                          448KB

                        • memory/1204-227-0x0000011CC1820000-0x0000011CC1890000-memory.dmp

                          Filesize

                          448KB

                        • memory/1204-170-0x0000011CC17B0000-0x0000011CC1820000-memory.dmp

                          Filesize

                          448KB

                        • memory/1396-177-0x000001E83A8D0000-0x000001E83A940000-memory.dmp

                          Filesize

                          448KB

                        • memory/1396-229-0x000001E83AE40000-0x000001E83AEB0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1416-223-0x000002ED05640000-0x000002ED056B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1416-158-0x000002ED05010000-0x000002ED05080000-memory.dmp

                          Filesize

                          448KB

                        • memory/1852-225-0x000002B355DB0000-0x000002B355E20000-memory.dmp

                          Filesize

                          448KB

                        • memory/1852-164-0x000002B355330000-0x000002B3553A0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1968-195-0x00000223E1440000-0x00000223E1444000-memory.dmp

                          Filesize

                          16KB

                        • memory/1968-134-0x00000223E1700000-0x00000223E174B000-memory.dmp

                          Filesize

                          300KB

                        • memory/1968-197-0x00000223E13B0000-0x00000223E13B4000-memory.dmp

                          Filesize

                          16KB

                        • memory/1968-152-0x00000223E17C0000-0x00000223E1830000-memory.dmp

                          Filesize

                          448KB

                        • memory/1968-194-0x00000223E1440000-0x00000223E1441000-memory.dmp

                          Filesize

                          4KB

                        • memory/1968-193-0x00000223E1750000-0x00000223E1754000-memory.dmp

                          Filesize

                          16KB

                        • memory/2356-120-0x0000000000000000-mapping.dmp

                        • memory/2356-129-0x0000000001170000-0x000000000118C000-memory.dmp

                          Filesize

                          112KB

                        • memory/2356-126-0x0000000000A50000-0x0000000000A51000-memory.dmp

                          Filesize

                          4KB

                        • memory/2356-130-0x0000000001190000-0x0000000001191000-memory.dmp

                          Filesize

                          4KB

                        • memory/2356-132-0x000000001B5C0000-0x000000001B5C2000-memory.dmp

                          Filesize

                          8KB

                        • memory/2356-128-0x0000000001150000-0x0000000001151000-memory.dmp

                          Filesize

                          4KB

                        • memory/2364-180-0x0000013FA6640000-0x0000013FA66B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2364-217-0x0000013FA66B0000-0x0000013FA6720000-memory.dmp

                          Filesize

                          448KB

                        • memory/2380-175-0x000001E1BB560000-0x000001E1BB5D0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2380-215-0x000001E1BBCD0000-0x000001E1BBD40000-memory.dmp

                          Filesize

                          448KB

                        • memory/2596-161-0x0000016AA1910000-0x0000016AA1980000-memory.dmp

                          Filesize

                          448KB

                        • memory/2596-211-0x0000016AA1A10000-0x0000016AA1A80000-memory.dmp

                          Filesize

                          448KB

                        • memory/2672-233-0x000001DFC3440000-0x000001DFC34B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2672-187-0x000001DFC2A90000-0x000001DFC2B00000-memory.dmp

                          Filesize

                          448KB

                        • memory/2692-183-0x0000024ADA440000-0x0000024ADA4B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2692-231-0x0000024ADA970000-0x0000024ADA9E0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2840-116-0x0000000000000000-mapping.dmp

                        • memory/3028-131-0x0000000004857000-0x0000000004958000-memory.dmp

                          Filesize

                          1.0MB

                        • memory/3028-136-0x0000000003020000-0x000000000307C000-memory.dmp

                          Filesize

                          368KB

                        • memory/3028-119-0x0000000000000000-mapping.dmp

                        • memory/3612-192-0x0000020A2CE00000-0x0000020A2CEFF000-memory.dmp

                          Filesize

                          1020KB

                        • memory/3612-163-0x0000020A2A870000-0x0000020A2A8E0000-memory.dmp

                          Filesize

                          448KB

                        • memory/3612-137-0x00007FF6E4F44060-mapping.dmp