Resubmissions

25-04-2021 09:42

210425-v9mttlcxke 10

25-04-2021 08:59

210425-1d89vxfyln 10

25-04-2021 07:37

210425-b8smdccdwe 10

25-04-2021 06:55

210425-1csfnkw57n 10

24-04-2021 20:32

210424-x7kp9rrf4x 10

Analysis

  • max time kernel
    19s
  • max time network
    69s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    24-04-2021 20:32

General

  • Target

    keygen-step-4.exe

  • Size

    4.6MB

  • MD5

    563107b1df2a00f4ec868acd9e08a205

  • SHA1

    9cb9c91d66292f5317aa50d92e38834861e9c9b7

  • SHA256

    bf2bd257dde4921ce83c7c1303fafe7f9f81e53c2775d3c373ced482b22eb8a9

  • SHA512

    99a8d247fa435c4cd95be7bc64c7dd6e382371f3a3c160aac3995fd705e4fd3f6622c23784a4ae3457c87536347d15eda3f08aa616450778a99376df540d74d1

Score
8/10

Malware Config

Signatures

  • Downloads MZ/PE file
  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • 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 8 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s Browser
    1⤵
      PID:2712
    • 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:736
      • 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:1016
        • 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:3140
      • 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:200
      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe
        "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:500
        • C:\Users\Admin\AppData\Local\Temp\is-VUPPV.tmp\Install.tmp
          "C:\Users\Admin\AppData\Local\Temp\is-VUPPV.tmp\Install.tmp" /SL5="$501A0,235791,152064,C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe"
          3⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of WriteProcessMemory
          PID:1832
          • C:\Users\Admin\AppData\Local\Temp\is-3DT2T.tmp\Ultra.exe
            "C:\Users\Admin\AppData\Local\Temp\is-3DT2T.tmp\Ultra.exe" /S /UID=burnerch1
            4⤵
            • Drops file in Drivers directory
            • Executes dropped EXE
            • Drops file in Program Files directory
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:3316
            • C:\Program Files\Reference Assemblies\PLCULSOHKR\ultramediaburner.exe
              "C:\Program Files\Reference Assemblies\PLCULSOHKR\ultramediaburner.exe" /VERYSILENT
              5⤵
                PID:3744
      • \??\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:1340
        • 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:744

      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\Reference Assemblies\PLCULSOHKR\ultramediaburner.exe
        MD5

        e458934d2026e26c1fcfadd5c2c8bfd3

        SHA1

        f4b984824a2204b66ccce0973f937a48b46ed0f8

        SHA256

        229b625cf342031621c71ec119827bd67c73f1453f87a1cd8df0c49c5ed9f6ec

        SHA512

        62abfbe0c00ff12aa1a26054e0a3085bbc5214e6cce08106de19eba091ce65ee2a0a6b7ed0324ca2ef68bfd7486009f314f71e66a65252efb489381db3ec0ce3

      • C:\Program Files\Reference Assemblies\PLCULSOHKR\ultramediaburner.exe
        MD5

        97e7a50d32252a3c492170fe2c88baee

        SHA1

        5549a8d4b85aae4d5abe9e5abe3f9ce6a944a7c6

        SHA256

        51be0a6a7a4417a470607c36c100765f941d779a920247036190e9d30684764b

        SHA512

        afe97bd75829f9c4cc932ad565a50c2963c5161436396ce0c6560687cda0d8a470b184f81fdb65eac664593002648e19c978681c3a018810e685e78be048af4c

      • 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\Install.exe
        MD5

        41a5f4fd1ea7cac4aa94a87aebccfef0

        SHA1

        0d0abf079413a4c773754bf4fda338dc5b9a8ddc

        SHA256

        97e95e99fd499ec45a7c1d8683d5731ce5e7a8fb8b710622e578cd169a00d8d9

        SHA512

        5ca14bda498f26efff4e1179969b8f2c25244063c7bf25f3ec20b5cd24b5be320bbfb8b3d0b2d66f5c5b415da777a766fece5f251a4247773c6cb991417fb75f

      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe
        MD5

        41a5f4fd1ea7cac4aa94a87aebccfef0

        SHA1

        0d0abf079413a4c773754bf4fda338dc5b9a8ddc

        SHA256

        97e95e99fd499ec45a7c1d8683d5731ce5e7a8fb8b710622e578cd169a00d8d9

        SHA512

        5ca14bda498f26efff4e1179969b8f2c25244063c7bf25f3ec20b5cd24b5be320bbfb8b3d0b2d66f5c5b415da777a766fece5f251a4247773c6cb991417fb75f

      • 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

      • C:\Users\Admin\AppData\Local\Temp\is-3DT2T.tmp\Ultra.exe
        MD5

        cc2e3f1906f2f7a7318ce8e6f0f00683

        SHA1

        ff26f4b8ba148ddd488dde4eadd2412d6c288580

        SHA256

        0ed89ff238edaa1b5b084d5c3c7ba6864b59dac5a6fd961a9065e966f55b9cb2

        SHA512

        49d86be8794e0161bc2f2db626b9ce0031e9614486605f283c6cd8429fe9d907f3f3851d15cd318df5945ad2acac85da18f042f3692c38b794cc11d27b77a05a

      • C:\Users\Admin\AppData\Local\Temp\is-3DT2T.tmp\Ultra.exe
        MD5

        cc2e3f1906f2f7a7318ce8e6f0f00683

        SHA1

        ff26f4b8ba148ddd488dde4eadd2412d6c288580

        SHA256

        0ed89ff238edaa1b5b084d5c3c7ba6864b59dac5a6fd961a9065e966f55b9cb2

        SHA512

        49d86be8794e0161bc2f2db626b9ce0031e9614486605f283c6cd8429fe9d907f3f3851d15cd318df5945ad2acac85da18f042f3692c38b794cc11d27b77a05a

      • C:\Users\Admin\AppData\Local\Temp\is-VUPPV.tmp\Install.tmp
        MD5

        45ca138d0bb665df6e4bef2add68c7bf

        SHA1

        12c1a48e3a02f319a3d3ca647d04442d55e09265

        SHA256

        3960a0597104fc5bbf82bf6c03564a1eb6a829c560d1f50d0a63b4772fafbe37

        SHA512

        cd1a0493c26798eb70b3dabb8a439de7792c4676905cad21c6b3f372213ce9f6b65648245defcd36d4f19285160f41c62e1025e772e6b9f11aa126388ea8364f

      • \Program Files\install.dll
        MD5

        fe60ddbeab6e50c4f490ddf56b52057c

        SHA1

        6a71fdf73761a1192fd9c6961f66754a63d6db17

        SHA256

        9fcfa73600ff1b588015ffa20779cec6714e48ee6ae15db8766f7ffd5ee3031d

        SHA512

        0113b47ba1a33a2f597a26c9b66435483373cde4edb183e0e92abef8ed003743f426ba5ffe25a5807c030cc14d8a95d73aa6af95a85f44a86dd40264ecb96536

      • \Users\Admin\AppData\Local\Temp\is-3DT2T.tmp\idp.dll
        MD5

        8f995688085bced38ba7795f60a5e1d3

        SHA1

        5b1ad67a149c05c50d6e388527af5c8a0af4343a

        SHA256

        203d7b61eac96de865ab3b586160e72c78d93ab5532b13d50ef27174126fd006

        SHA512

        043d41947ab69fc9297dcb5ad238acc2c35250d1172869945ed1a56894c10f93855f0210cbca41ceee9efb55fd56a35a4ec03c77e252409edc64bfb5fb821c35

      • memory/200-126-0x0000000000AF0000-0x0000000000AF1000-memory.dmp
        Filesize

        4KB

      • memory/200-130-0x0000000001230000-0x0000000001231000-memory.dmp
        Filesize

        4KB

      • memory/200-128-0x0000000001000000-0x0000000001001000-memory.dmp
        Filesize

        4KB

      • memory/200-120-0x0000000000000000-mapping.dmp
      • memory/200-129-0x0000000001010000-0x000000000102C000-memory.dmp
        Filesize

        112KB

      • memory/200-144-0x000000001B8E0000-0x000000001B8E2000-memory.dmp
        Filesize

        8KB

      • memory/500-147-0x0000000000400000-0x000000000042B000-memory.dmp
        Filesize

        172KB

      • memory/500-145-0x0000000000000000-mapping.dmp
      • memory/744-134-0x00007FF6ADAD4060-mapping.dmp
      • memory/744-137-0x0000016BBE400000-0x0000016BBE44B000-memory.dmp
        Filesize

        300KB

      • memory/744-140-0x0000016BBE700000-0x0000016BBE770000-memory.dmp
        Filesize

        448KB

      • memory/1016-116-0x0000000000000000-mapping.dmp
      • memory/1340-132-0x000001FA4D110000-0x000001FA4D112000-memory.dmp
        Filesize

        8KB

      • memory/1340-142-0x000001FA4D4B0000-0x000001FA4D520000-memory.dmp
        Filesize

        448KB

      • memory/1832-153-0x00000000001E0000-0x00000000001E1000-memory.dmp
        Filesize

        4KB

      • memory/1832-149-0x0000000000000000-mapping.dmp
      • memory/3140-139-0x0000000000FA0000-0x0000000000FFC000-memory.dmp
        Filesize

        368KB

      • memory/3140-135-0x0000000000E50000-0x0000000000EFE000-memory.dmp
        Filesize

        696KB

      • memory/3140-119-0x0000000000000000-mapping.dmp
      • memory/3316-157-0x00000000023C0000-0x00000000023C2000-memory.dmp
        Filesize

        8KB

      • memory/3316-154-0x0000000000000000-mapping.dmp
      • memory/3744-158-0x0000000000000000-mapping.dmp
      • memory/3744-160-0x0000000000400000-0x0000000000416000-memory.dmp
        Filesize

        88KB