Analysis

  • max time kernel
    60s
  • max time network
    62s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    23/12/2022, 00:03

General

  • Target

    9803d185daf6ff0171a453af0d44104903efc5233b2cbdd5c1e889f4fd692b8b.exe

  • Size

    1.6MB

  • MD5

    3a42f5e64bbc57ff87da632ed703dd6e

  • SHA1

    056ed9f32cb796fe44aa7f62ed044ddce2eb0d9f

  • SHA256

    9803d185daf6ff0171a453af0d44104903efc5233b2cbdd5c1e889f4fd692b8b

  • SHA512

    77ef719cfb6ee073c55491f35683905e45ddd5b365ca955cb459b702cbba52ab2f7fac84bb0666cac2592064ecb9fadbb60c6a32aa5866584b29c6ce7c6110e2

  • SSDEEP

    24576:tizCqBHw58pcC4aY6tXZIzfFOSZ8Mu1crXz2mz5MdvV3Y9n+6QPY8ygZIY7eCLxc:GxQU/yzdh8Mu1cRVMd93jAwNeViY

Score
10/10

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

85.31.46.167

Signatures

  • NyMaim

    NyMaim is a malware with various capabilities written in C++ and first seen in 2013.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 10 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in Program Files directory 17 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9803d185daf6ff0171a453af0d44104903efc5233b2cbdd5c1e889f4fd692b8b.exe
    "C:\Users\Admin\AppData\Local\Temp\9803d185daf6ff0171a453af0d44104903efc5233b2cbdd5c1e889f4fd692b8b.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1648
    • C:\Users\Admin\AppData\Local\Temp\is-3S1LK.tmp\is-653SG.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-3S1LK.tmp\is-653SG.tmp" /SL4 $60124 "C:\Users\Admin\AppData\Local\Temp\9803d185daf6ff0171a453af0d44104903efc5233b2cbdd5c1e889f4fd692b8b.exe" 1490381 51712
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:804
      • C:\Program Files (x86)\Split Files\SplitFiles.exe
        "C:\Program Files (x86)\Split Files\SplitFiles.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1756
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\CtDdOg.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1644
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1108
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "SplitFiles.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1528

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Program Files (x86)\Split Files\SplitFiles.exe

          Filesize

          3.0MB

          MD5

          14d62d38818af1514ca0314f4d08bc7d

          SHA1

          cc265735ceb77ed4c5a17a00f7225226aa2ef649

          SHA256

          b22227a24effb1409b1724dd067be0b1e0c9c478dff0bd2c426e2b99c81ec75e

          SHA512

          8e8ed042acab10e05e0723faa15dec8918de4245387327ce758eda7a1ca4a1fbd826e86af7d9bed5a600164427a446e355a1f2fc95672768a1f05c5a96ecab9c

        • C:\Program Files (x86)\Split Files\SplitFiles.exe

          Filesize

          3.0MB

          MD5

          14d62d38818af1514ca0314f4d08bc7d

          SHA1

          cc265735ceb77ed4c5a17a00f7225226aa2ef649

          SHA256

          b22227a24effb1409b1724dd067be0b1e0c9c478dff0bd2c426e2b99c81ec75e

          SHA512

          8e8ed042acab10e05e0723faa15dec8918de4245387327ce758eda7a1ca4a1fbd826e86af7d9bed5a600164427a446e355a1f2fc95672768a1f05c5a96ecab9c

        • C:\Users\Admin\AppData\Local\Temp\is-3S1LK.tmp\is-653SG.tmp

          Filesize

          643KB

          MD5

          85b94e72c3f2d2b5464e2aaf3c9e242a

          SHA1

          ce7ccae5f50a990d059d59292d4a332979e162ba

          SHA256

          1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

          SHA512

          c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

        • C:\Users\Admin\AppData\Local\Temp\is-3S1LK.tmp\is-653SG.tmp

          Filesize

          643KB

          MD5

          85b94e72c3f2d2b5464e2aaf3c9e242a

          SHA1

          ce7ccae5f50a990d059d59292d4a332979e162ba

          SHA256

          1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

          SHA512

          c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\CtDdOg.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\CtDdOg.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • \Program Files (x86)\Split Files\SplitFiles.exe

          Filesize

          3.0MB

          MD5

          14d62d38818af1514ca0314f4d08bc7d

          SHA1

          cc265735ceb77ed4c5a17a00f7225226aa2ef649

          SHA256

          b22227a24effb1409b1724dd067be0b1e0c9c478dff0bd2c426e2b99c81ec75e

          SHA512

          8e8ed042acab10e05e0723faa15dec8918de4245387327ce758eda7a1ca4a1fbd826e86af7d9bed5a600164427a446e355a1f2fc95672768a1f05c5a96ecab9c

        • \Program Files (x86)\Split Files\SplitFiles.exe

          Filesize

          3.0MB

          MD5

          14d62d38818af1514ca0314f4d08bc7d

          SHA1

          cc265735ceb77ed4c5a17a00f7225226aa2ef649

          SHA256

          b22227a24effb1409b1724dd067be0b1e0c9c478dff0bd2c426e2b99c81ec75e

          SHA512

          8e8ed042acab10e05e0723faa15dec8918de4245387327ce758eda7a1ca4a1fbd826e86af7d9bed5a600164427a446e355a1f2fc95672768a1f05c5a96ecab9c

        • \Program Files (x86)\Split Files\SplitFiles.exe

          Filesize

          3.0MB

          MD5

          14d62d38818af1514ca0314f4d08bc7d

          SHA1

          cc265735ceb77ed4c5a17a00f7225226aa2ef649

          SHA256

          b22227a24effb1409b1724dd067be0b1e0c9c478dff0bd2c426e2b99c81ec75e

          SHA512

          8e8ed042acab10e05e0723faa15dec8918de4245387327ce758eda7a1ca4a1fbd826e86af7d9bed5a600164427a446e355a1f2fc95672768a1f05c5a96ecab9c

        • \Users\Admin\AppData\Local\Temp\is-3S1LK.tmp\is-653SG.tmp

          Filesize

          643KB

          MD5

          85b94e72c3f2d2b5464e2aaf3c9e242a

          SHA1

          ce7ccae5f50a990d059d59292d4a332979e162ba

          SHA256

          1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

          SHA512

          c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

        • \Users\Admin\AppData\Local\Temp\is-I4397.tmp\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • \Users\Admin\AppData\Local\Temp\is-I4397.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Local\Temp\is-I4397.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\CtDdOg.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\CtDdOg.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\CtDdOg.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/804-90-0x00000000038B0000-0x00000000049BC000-memory.dmp

          Filesize

          17.0MB

        • memory/804-73-0x00000000038B0000-0x00000000049BC000-memory.dmp

          Filesize

          17.0MB

        • memory/1648-55-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/1648-97-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/1648-71-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/1648-54-0x0000000075811000-0x0000000075813000-memory.dmp

          Filesize

          8KB

        • memory/1756-78-0x0000000000400000-0x000000000150C000-memory.dmp

          Filesize

          17.0MB

        • memory/1756-86-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/1756-77-0x0000000000400000-0x000000000150C000-memory.dmp

          Filesize

          17.0MB

        • memory/1756-91-0x0000000000400000-0x000000000150C000-memory.dmp

          Filesize

          17.0MB

        • memory/1756-92-0x0000000001B60000-0x0000000002C6C000-memory.dmp

          Filesize

          17.0MB

        • memory/1756-93-0x0000000000400000-0x000000000150C000-memory.dmp

          Filesize

          17.0MB

        • memory/1756-76-0x0000000001B60000-0x0000000002C6C000-memory.dmp

          Filesize

          17.0MB

        • memory/1756-96-0x0000000000400000-0x000000000150C000-memory.dmp

          Filesize

          17.0MB

        • memory/1756-75-0x0000000001B60000-0x0000000002C6C000-memory.dmp

          Filesize

          17.0MB

        • memory/1756-74-0x0000000000400000-0x000000000150C000-memory.dmp

          Filesize

          17.0MB