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
    1788s
  • max time network
    1707s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • 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

  • Downloads MZ/PE file
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 2 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.

  • 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 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 51 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 ProfSvc
    1⤵
      PID:1096
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
      1⤵
        PID:2852
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s WpnService
        1⤵
          PID:2836
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s Browser
          1⤵
          • Modifies registry class
          PID:2756
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
          1⤵
            PID:2608
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
            1⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2576
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
            1⤵
              PID:1908
            • 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:1376
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s Themes
                  1⤵
                    PID:1180
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                    1⤵
                      PID:68
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                      1⤵
                        PID:340
                      • 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:800
                        • 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:3020
                          • 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:1840
                        • 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:1940
                        • 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:2292
                          • C:\Users\Admin\AppData\Local\Temp\is-88N22.tmp\Install.tmp
                            "C:\Users\Admin\AppData\Local\Temp\is-88N22.tmp\Install.tmp" /SL5="$501D6,235791,152064,C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe"
                            3⤵
                            • Executes dropped EXE
                            • Loads dropped DLL
                            • Suspicious use of WriteProcessMemory
                            PID:3672
                            • C:\Users\Admin\AppData\Local\Temp\is-CAP36.tmp\Ultra.exe
                              "C:\Users\Admin\AppData\Local\Temp\is-CAP36.tmp\Ultra.exe" /S /UID=burnerch1
                              4⤵
                              • Executes dropped EXE
                              • Suspicious use of WriteProcessMemory
                              PID:2272
                              • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe
                                dw20.exe -x -s 1268
                                5⤵
                                • Suspicious behavior: EnumeratesProcesses
                                PID:2236
                      • \??\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:1116
                        • 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:1620

                      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-88N22.tmp\Install.tmp
                        MD5

                        45ca138d0bb665df6e4bef2add68c7bf

                        SHA1

                        12c1a48e3a02f319a3d3ca647d04442d55e09265

                        SHA256

                        3960a0597104fc5bbf82bf6c03564a1eb6a829c560d1f50d0a63b4772fafbe37

                        SHA512

                        cd1a0493c26798eb70b3dabb8a439de7792c4676905cad21c6b3f372213ce9f6b65648245defcd36d4f19285160f41c62e1025e772e6b9f11aa126388ea8364f

                      • C:\Users\Admin\AppData\Local\Temp\is-CAP36.tmp\Ultra.exe
                        MD5

                        cc2e3f1906f2f7a7318ce8e6f0f00683

                        SHA1

                        ff26f4b8ba148ddd488dde4eadd2412d6c288580

                        SHA256

                        0ed89ff238edaa1b5b084d5c3c7ba6864b59dac5a6fd961a9065e966f55b9cb2

                        SHA512

                        49d86be8794e0161bc2f2db626b9ce0031e9614486605f283c6cd8429fe9d907f3f3851d15cd318df5945ad2acac85da18f042f3692c38b794cc11d27b77a05a

                      • C:\Users\Admin\AppData\Local\Temp\is-CAP36.tmp\Ultra.exe
                        MD5

                        cc2e3f1906f2f7a7318ce8e6f0f00683

                        SHA1

                        ff26f4b8ba148ddd488dde4eadd2412d6c288580

                        SHA256

                        0ed89ff238edaa1b5b084d5c3c7ba6864b59dac5a6fd961a9065e966f55b9cb2

                        SHA512

                        49d86be8794e0161bc2f2db626b9ce0031e9614486605f283c6cd8429fe9d907f3f3851d15cd318df5945ad2acac85da18f042f3692c38b794cc11d27b77a05a

                      • \Program Files\install.dll
                        MD5

                        fe60ddbeab6e50c4f490ddf56b52057c

                        SHA1

                        6a71fdf73761a1192fd9c6961f66754a63d6db17

                        SHA256

                        9fcfa73600ff1b588015ffa20779cec6714e48ee6ae15db8766f7ffd5ee3031d

                        SHA512

                        0113b47ba1a33a2f597a26c9b66435483373cde4edb183e0e92abef8ed003743f426ba5ffe25a5807c030cc14d8a95d73aa6af95a85f44a86dd40264ecb96536

                      • \Users\Admin\AppData\Local\Temp\is-CAP36.tmp\idp.dll
                        MD5

                        8f995688085bced38ba7795f60a5e1d3

                        SHA1

                        5b1ad67a149c05c50d6e388527af5c8a0af4343a

                        SHA256

                        203d7b61eac96de865ab3b586160e72c78d93ab5532b13d50ef27174126fd006

                        SHA512

                        043d41947ab69fc9297dcb5ad238acc2c35250d1172869945ed1a56894c10f93855f0210cbca41ceee9efb55fd56a35a4ec03c77e252409edc64bfb5fb821c35

                      • memory/68-235-0x0000027FAC940000-0x0000027FAC9B0000-memory.dmp
                        Filesize

                        448KB

                      • memory/68-178-0x0000027FAC210000-0x0000027FAC280000-memory.dmp
                        Filesize

                        448KB

                      • memory/340-144-0x0000026116740000-0x00000261167B0000-memory.dmp
                        Filesize

                        448KB

                      • memory/340-227-0x0000026116D40000-0x0000026116DB0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1096-233-0x0000029F01440000-0x0000029F014B0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1096-176-0x0000029F00770000-0x0000029F007E0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1116-208-0x000002209D340000-0x000002209D341000-memory.dmp
                        Filesize

                        4KB

                      • memory/1116-209-0x000002209D340000-0x000002209D344000-memory.dmp
                        Filesize

                        16KB

                      • memory/1116-207-0x000002209D650000-0x000002209D654000-memory.dmp
                        Filesize

                        16KB

                      • memory/1116-145-0x000002209D6C0000-0x000002209D730000-memory.dmp
                        Filesize

                        448KB

                      • memory/1116-143-0x000002209D600000-0x000002209D64B000-memory.dmp
                        Filesize

                        300KB

                      • memory/1116-211-0x000002209D210000-0x000002209D214000-memory.dmp
                        Filesize

                        16KB

                      • memory/1180-241-0x0000026035020000-0x0000026035090000-memory.dmp
                        Filesize

                        448KB

                      • memory/1180-184-0x0000026034FB0000-0x0000026035020000-memory.dmp
                        Filesize

                        448KB

                      • memory/1376-243-0x000002AD6F820000-0x000002AD6F890000-memory.dmp
                        Filesize

                        448KB

                      • memory/1376-186-0x000002AD6F400000-0x000002AD6F470000-memory.dmp
                        Filesize

                        448KB

                      • memory/1428-237-0x000001F56A2E0000-0x000001F56A350000-memory.dmp
                        Filesize

                        448KB

                      • memory/1428-180-0x000001F56A200000-0x000001F56A270000-memory.dmp
                        Filesize

                        448KB

                      • memory/1620-156-0x0000015A1E180000-0x0000015A1E1F0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1620-136-0x00007FF7AA864060-mapping.dmp
                      • memory/1620-205-0x0000015A20900000-0x0000015A209FF000-memory.dmp
                        Filesize

                        1020KB

                      • memory/1840-132-0x00000000045A0000-0x00000000045FC000-memory.dmp
                        Filesize

                        368KB

                      • memory/1840-119-0x0000000000000000-mapping.dmp
                      • memory/1840-131-0x0000000004495000-0x0000000004596000-memory.dmp
                        Filesize

                        1.0MB

                      • memory/1908-182-0x000001430C400000-0x000001430C470000-memory.dmp
                        Filesize

                        448KB

                      • memory/1908-239-0x000001430C530000-0x000001430C5A0000-memory.dmp
                        Filesize

                        448KB

                      • memory/1940-128-0x00000000012F0000-0x00000000012F1000-memory.dmp
                        Filesize

                        4KB

                      • memory/1940-133-0x000000001B880000-0x000000001B882000-memory.dmp
                        Filesize

                        8KB

                      • memory/1940-130-0x0000000001320000-0x0000000001321000-memory.dmp
                        Filesize

                        4KB

                      • memory/1940-123-0x0000000000000000-mapping.dmp
                      • memory/1940-129-0x0000000001300000-0x000000000131C000-memory.dmp
                        Filesize

                        112KB

                      • memory/1940-126-0x0000000000AF0000-0x0000000000AF1000-memory.dmp
                        Filesize

                        4KB

                      • memory/2236-206-0x0000000000000000-mapping.dmp
                      • memory/2272-203-0x0000000002FB0000-0x0000000002FB2000-memory.dmp
                        Filesize

                        8KB

                      • memory/2272-200-0x0000000000000000-mapping.dmp
                      • memory/2292-188-0x0000000000000000-mapping.dmp
                      • memory/2292-192-0x0000000000400000-0x000000000042B000-memory.dmp
                        Filesize

                        172KB

                      • memory/2576-231-0x00000154C8740000-0x00000154C87B0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2576-157-0x00000154C7CD0000-0x00000154C7D40000-memory.dmp
                        Filesize

                        448KB

                      • memory/2608-151-0x000002209B490000-0x000002209B500000-memory.dmp
                        Filesize

                        448KB

                      • memory/2608-229-0x000002209BB00000-0x000002209BB70000-memory.dmp
                        Filesize

                        448KB

                      • memory/2756-152-0x0000028AEBFA0000-0x0000028AEC010000-memory.dmp
                        Filesize

                        448KB

                      • memory/2756-225-0x0000028AEC540000-0x0000028AEC5B0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2836-195-0x000001B333A40000-0x000001B333AB0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2836-247-0x000001B333AB0000-0x000001B333B20000-memory.dmp
                        Filesize

                        448KB

                      • memory/2852-189-0x000001D2CBB40000-0x000001D2CBBB0000-memory.dmp
                        Filesize

                        448KB

                      • memory/2852-245-0x000001D2CBD70000-0x000001D2CBDE0000-memory.dmp
                        Filesize

                        448KB

                      • memory/3020-116-0x0000000000000000-mapping.dmp
                      • memory/3672-196-0x0000000000000000-mapping.dmp
                      • memory/3672-199-0x00000000001E0000-0x00000000001E1000-memory.dmp
                        Filesize

                        4KB