Resubmissions

08-07-2021 12:18

210708-8z6d5h8z2n 10

06-07-2021 17:53

210706-g6we6sa7sa 10

19-06-2021 18:17

210619-vr8bj2dzfn 10

17-06-2021 21:39

210617-a9cvlnmrbx 10

11-06-2021 17:26

210611-wvab1yw2tj 10

08-06-2021 06:47

210608-qrbpch3y46 10

08-06-2021 06:47

210608-64tndgm1ln 10

05-06-2021 18:40

210605-cd6qpr55sx 10

04-06-2021 11:56

210604-5c416rs3ns 10

04-06-2021 08:52

210604-jy9885jen2 10

Analysis

  • max time kernel
    1793s
  • max time network
    1702s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    28-04-2021 05:13

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 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 40 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 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 LanmanServer
            1⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2372
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
            1⤵
              PID:1872
            • 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:2116
              • 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:796
                • 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:3064
              • 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:1004
                • C:\Windows\system32\WerFault.exe
                  C:\Windows\system32\WerFault.exe -u -p 1004 -s 1600
                  3⤵
                  • Program crash
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2304
            • 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 UserManager
                1⤵
                  PID:1348
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s Themes
                  1⤵
                    PID:1316
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                    1⤵
                    • Modifies registry class
                    PID:1100
                  • 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 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:3152
                      • 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:3464
                      • 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:4020
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                      1⤵
                        PID:1012

                      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/796-116-0x0000000000000000-mapping.dmp
                      • memory/912-178-0x000001E4B4B10000-0x000001E4B4B80000-memory.dmp
                        Filesize

                        448KB

                      • memory/912-226-0x000001E4B4BF0000-0x000001E4B4C61000-memory.dmp
                        Filesize

                        452KB

                      • memory/1004-120-0x0000000000000000-mapping.dmp
                      • memory/1004-126-0x00000000006E0000-0x00000000006E1000-memory.dmp
                        Filesize

                        4KB

                      • memory/1004-130-0x00000000025B0000-0x00000000025B1000-memory.dmp
                        Filesize

                        4KB

                      • memory/1004-138-0x00000000025C0000-0x00000000025DC000-memory.dmp
                        Filesize

                        112KB

                      • memory/1004-151-0x0000000002620000-0x0000000002622000-memory.dmp
                        Filesize

                        8KB

                      • memory/1004-147-0x00000000025E0000-0x00000000025E1000-memory.dmp
                        Filesize

                        4KB

                      • memory/1012-143-0x000001E6DB160000-0x000001E6DB1AB000-memory.dmp
                        Filesize

                        300KB

                      • memory/1012-218-0x000001E6DB8B0000-0x000001E6DB921000-memory.dmp
                        Filesize

                        452KB

                      • memory/1012-145-0x000001E6DB280000-0x000001E6DB2F0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1100-224-0x00000258DF540000-0x00000258DF5B1000-memory.dmp
                        Filesize

                        452KB

                      • memory/1100-176-0x00000258DF030000-0x00000258DF0A0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1316-232-0x000001F058F40000-0x000001F058FB1000-memory.dmp
                        Filesize

                        452KB

                      • memory/1316-184-0x000001F058470000-0x000001F0584E0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1348-234-0x0000022EED520000-0x0000022EED591000-memory.dmp
                        Filesize

                        452KB

                      • memory/1348-186-0x0000022EED100000-0x0000022EED170000-memory.dmp
                        Filesize

                        448KB

                      • memory/1448-180-0x000001A710610000-0x000001A710680000-memory.dmp
                        Filesize

                        448KB

                      • memory/1448-228-0x000001A710770000-0x000001A7107E1000-memory.dmp
                        Filesize

                        452KB

                      • memory/1872-230-0x0000023E977B0000-0x0000023E97821000-memory.dmp
                        Filesize

                        452KB

                      • memory/1872-182-0x0000023E97740000-0x0000023E977B0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2372-157-0x000001A3B4EE0000-0x000001A3B4F50000-memory.dmp
                        Filesize

                        448KB

                      • memory/2372-222-0x000001A3B5940000-0x000001A3B59B1000-memory.dmp
                        Filesize

                        452KB

                      • memory/2424-152-0x0000018CA3F40000-0x0000018CA3FB0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2424-220-0x0000018CA4510000-0x0000018CA4581000-memory.dmp
                        Filesize

                        452KB

                      • memory/2560-139-0x000001B274C80000-0x000001B274CF0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2560-216-0x000001B2752B0000-0x000001B275321000-memory.dmp
                        Filesize

                        452KB

                      • memory/2680-236-0x0000023A60940000-0x0000023A609B1000-memory.dmp
                        Filesize

                        452KB

                      • memory/2680-188-0x0000023A60240000-0x0000023A602B0000-memory.dmp
                        Filesize

                        448KB

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

                        448KB

                      • memory/2708-238-0x0000020ED6F20000-0x0000020ED6F91000-memory.dmp
                        Filesize

                        452KB

                      • memory/3064-136-0x0000000002F00000-0x0000000002F5C000-memory.dmp
                        Filesize

                        368KB

                      • memory/3064-119-0x0000000000000000-mapping.dmp
                      • memory/3064-133-0x0000000004812000-0x0000000004913000-memory.dmp
                        Filesize

                        1.0MB

                      • memory/3152-150-0x0000018B702B0000-0x0000018B70320000-memory.dmp
                        Filesize

                        448KB

                      • memory/3152-200-0x0000018B6FED0000-0x0000018B6FED4000-memory.dmp
                        Filesize

                        16KB

                      • memory/3152-199-0x0000018B6FED0000-0x0000018B6FED1000-memory.dmp
                        Filesize

                        4KB

                      • memory/3152-198-0x0000018B6FF20000-0x0000018B6FF24000-memory.dmp
                        Filesize

                        16KB

                      • memory/3152-202-0x0000018B6DCE0000-0x0000018B6DCE4000-memory.dmp
                        Filesize

                        16KB

                      • memory/3464-140-0x00000246E6840000-0x00000246E68B0000-memory.dmp
                        Filesize

                        448KB

                      • memory/3464-131-0x00007FF6A78A4060-mapping.dmp
                      • memory/4020-191-0x00007FF6A78A4060-mapping.dmp
                      • memory/4020-194-0x000002152A620000-0x000002152A66B000-memory.dmp
                        Filesize

                        300KB

                      • memory/4020-195-0x000002152A900000-0x000002152A971000-memory.dmp
                        Filesize

                        452KB

                      • memory/4020-197-0x000002152CF00000-0x000002152CFFF000-memory.dmp
                        Filesize

                        1020KB