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Analysis

  • max time kernel
    600s
  • max time network
    573s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    29-04-2021 05:37

General

  • Target

    keygen-step-4d.exe

  • Size

    4.6MB

  • MD5

    563107b1df2a00f4ec868acd9e08a205

  • SHA1

    9cb9c91d66292f5317aa50d92e38834861e9c9b7

  • SHA256

    bf2bd257dde4921ce83c7c1303fafe7f9f81e53c2775d3c373ced482b22eb8a9

  • SHA512

    99a8d247fa435c4cd95be7bc64c7dd6e382371f3a3c160aac3995fd705e4fd3f6622c23784a4ae3457c87536347d15eda3f08aa616450778a99376df540d74d1

Score
8/10

Malware Config

Signatures

  • Downloads MZ/PE file
  • 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 3 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 10 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 31 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 46 IoCs

Processes

  • 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 WpnService
      1⤵
      • Modifies registry class
      PID:2756
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
      1⤵
        PID:2744
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Browser
        1⤵
          PID:2664
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
          1⤵
            PID:2464
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
            1⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2432
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
            1⤵
              PID:1904
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s SENS
              1⤵
                PID:1428
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                1⤵
                  PID:1324
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                  1⤵
                    PID:1076
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                    1⤵
                      PID:924
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                      1⤵
                        PID:1020
                      • 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:1456
                        • 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:1372
                          • 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:1152
                        • 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:2300
                        • 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:4200
                          • C:\Users\Admin\AppData\Local\Temp\is-EEITO.tmp\Install.tmp
                            "C:\Users\Admin\AppData\Local\Temp\is-EEITO.tmp\Install.tmp" /SL5="$8007C,235791,152064,C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe"
                            3⤵
                            • Executes dropped EXE
                            • Loads dropped DLL
                            • Suspicious use of WriteProcessMemory
                            PID:4248
                            • C:\Users\Admin\AppData\Local\Temp\is-6S7BU.tmp\Ultra.exe
                              "C:\Users\Admin\AppData\Local\Temp\is-6S7BU.tmp\Ultra.exe" /S /UID=burnerch1
                              4⤵
                              • Executes dropped EXE
                              • Suspicious use of WriteProcessMemory
                              PID:4348
                              • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe
                                dw20.exe -x -s 1252
                                5⤵
                                • Suspicious behavior: EnumeratesProcesses
                                PID:4520
                      • \??\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:1844
                        • 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:852

                      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\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-6S7BU.tmp\Ultra.exe
                        MD5

                        cc2e3f1906f2f7a7318ce8e6f0f00683

                        SHA1

                        ff26f4b8ba148ddd488dde4eadd2412d6c288580

                        SHA256

                        0ed89ff238edaa1b5b084d5c3c7ba6864b59dac5a6fd961a9065e966f55b9cb2

                        SHA512

                        49d86be8794e0161bc2f2db626b9ce0031e9614486605f283c6cd8429fe9d907f3f3851d15cd318df5945ad2acac85da18f042f3692c38b794cc11d27b77a05a

                      • C:\Users\Admin\AppData\Local\Temp\is-6S7BU.tmp\Ultra.exe
                        MD5

                        cc2e3f1906f2f7a7318ce8e6f0f00683

                        SHA1

                        ff26f4b8ba148ddd488dde4eadd2412d6c288580

                        SHA256

                        0ed89ff238edaa1b5b084d5c3c7ba6864b59dac5a6fd961a9065e966f55b9cb2

                        SHA512

                        49d86be8794e0161bc2f2db626b9ce0031e9614486605f283c6cd8429fe9d907f3f3851d15cd318df5945ad2acac85da18f042f3692c38b794cc11d27b77a05a

                      • C:\Users\Admin\AppData\Local\Temp\is-EEITO.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-6S7BU.tmp\idp.dll
                        MD5

                        8f995688085bced38ba7795f60a5e1d3

                        SHA1

                        5b1ad67a149c05c50d6e388527af5c8a0af4343a

                        SHA256

                        203d7b61eac96de865ab3b586160e72c78d93ab5532b13d50ef27174126fd006

                        SHA512

                        043d41947ab69fc9297dcb5ad238acc2c35250d1172869945ed1a56894c10f93855f0210cbca41ceee9efb55fd56a35a4ec03c77e252409edc64bfb5fb821c35

                      • memory/852-134-0x00007FF628C74060-mapping.dmp
                      • memory/852-166-0x0000023F9B2D0000-0x0000023F9B340000-memory.dmp
                        Filesize

                        448KB

                      • memory/924-233-0x0000020244210000-0x0000020244280000-memory.dmp
                        Filesize

                        448KB

                      • memory/924-189-0x00000202441A0000-0x0000020244210000-memory.dmp
                        Filesize

                        448KB

                      • memory/1020-225-0x000002E863A20000-0x000002E863A90000-memory.dmp
                        Filesize

                        448KB

                      • memory/1020-172-0x000002E863940000-0x000002E8639B0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1076-231-0x0000021D3B5B0000-0x0000021D3B620000-memory.dmp
                        Filesize

                        448KB

                      • memory/1076-187-0x0000021D3B050000-0x0000021D3B0C0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1152-128-0x00000000047EE000-0x00000000048EF000-memory.dmp
                        Filesize

                        1.0MB

                      • memory/1152-119-0x0000000000000000-mapping.dmp
                      • memory/1152-149-0x0000000004950000-0x00000000049AC000-memory.dmp
                        Filesize

                        368KB

                      • memory/1204-239-0x0000029D64A40000-0x0000029D64AB0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1204-167-0x0000029D64960000-0x0000029D649D0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1324-174-0x000001360C6A0000-0x000001360C710000-memory.dmp
                        Filesize

                        448KB

                      • memory/1324-241-0x000001360CC40000-0x000001360CCB0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1372-116-0x0000000000000000-mapping.dmp
                      • memory/1428-235-0x000001239F550000-0x000001239F5C0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1428-154-0x000001239F470000-0x000001239F4E0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1844-209-0x000001D55FEA0000-0x000001D55FEA4000-memory.dmp
                        Filesize

                        16KB

                      • memory/1844-151-0x000001D560230000-0x000001D56027B000-memory.dmp
                        Filesize

                        300KB

                      • memory/1844-155-0x000001D5602F0000-0x000001D560360000-memory.dmp
                        Filesize

                        448KB

                      • memory/1844-206-0x000001D55FEA0000-0x000001D55FEA1000-memory.dmp
                        Filesize

                        4KB

                      • memory/1844-207-0x000001D55FEB0000-0x000001D55FEB4000-memory.dmp
                        Filesize

                        16KB

                      • memory/1844-205-0x000001D55FF60000-0x000001D55FF64000-memory.dmp
                        Filesize

                        16KB

                      • memory/1904-237-0x000001F5DF910000-0x000001F5DF980000-memory.dmp
                        Filesize

                        448KB

                      • memory/1904-161-0x000001F5DF350000-0x000001F5DF3C0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2300-153-0x0000000001750000-0x0000000001752000-memory.dmp
                        Filesize

                        8KB

                      • memory/2300-126-0x0000000000FD0000-0x0000000000FD1000-memory.dmp
                        Filesize

                        4KB

                      • memory/2300-122-0x0000000000000000-mapping.dmp
                      • memory/2300-129-0x00000000014D0000-0x00000000014D1000-memory.dmp
                        Filesize

                        4KB

                      • memory/2300-130-0x00000000014F0000-0x000000000150C000-memory.dmp
                        Filesize

                        112KB

                      • memory/2300-131-0x0000000001510000-0x0000000001511000-memory.dmp
                        Filesize

                        4KB

                      • memory/2432-184-0x000001CD9E7B0000-0x000001CD9E820000-memory.dmp
                        Filesize

                        448KB

                      • memory/2432-229-0x000001CD9E890000-0x000001CD9E900000-memory.dmp
                        Filesize

                        448KB

                      • memory/2464-227-0x0000028B81200000-0x0000028B81270000-memory.dmp
                        Filesize

                        448KB

                      • memory/2464-175-0x0000028B80FD0000-0x0000028B81040000-memory.dmp
                        Filesize

                        448KB

                      • memory/2664-212-0x00000251E70B0000-0x00000251E7120000-memory.dmp
                        Filesize

                        448KB

                      • memory/2664-162-0x00000251E6A70000-0x00000251E6AE0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2744-179-0x000001F247B50000-0x000001F247BC0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2744-243-0x000001F248900000-0x000001F248970000-memory.dmp
                        Filesize

                        448KB

                      • memory/2756-185-0x0000020EEFD80000-0x0000020EEFDF0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2756-245-0x0000020EF0340000-0x0000020EF03B0000-memory.dmp
                        Filesize

                        448KB

                      • memory/4200-193-0x0000000000400000-0x000000000042B000-memory.dmp
                        Filesize

                        172KB

                      • memory/4200-191-0x0000000000000000-mapping.dmp
                      • memory/4248-195-0x0000000000000000-mapping.dmp
                      • memory/4248-199-0x00000000001E0000-0x00000000001E1000-memory.dmp
                        Filesize

                        4KB

                      • memory/4348-200-0x0000000000000000-mapping.dmp
                      • memory/4348-203-0x0000000002AB0000-0x0000000002AB2000-memory.dmp
                        Filesize

                        8KB

                      • memory/4520-204-0x0000000000000000-mapping.dmp