Analysis

  • max time kernel
    55s
  • max time network
    56s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    23/12/2022, 03:17

General

  • Target

    file.exe

  • Size

    2.0MB

  • MD5

    24e5a78cf8e9d0e4f66d21920edce889

  • SHA1

    6a4afe76c8a36d6cd00b71842d78c9ee7033f1df

  • SHA256

    c27756b2d89d78d665ec7507ffacd7825f174dad2e69610f08a05cdfd8194868

  • SHA512

    aecd434351c6eedfe6b3900ce2eb04ebe27cdb8ce3eabe3330838957604079f9ca56db99eb263628af3b021a713b999b0733ac7bd2f8ddba1099af142fd3d186

  • SSDEEP

    49152:j1MIVklHN5IyvvCjkQVqTKWY20UWP7p30:j1M0kVFoLQfLGd0

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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1260
    • C:\Users\Admin\AppData\Local\Temp\is-J3F02.tmp\is-BEJN9.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-J3F02.tmp\is-BEJN9.tmp" /SL4 $A012C "C:\Users\Admin\AppData\Local\Temp\file.exe" 1791779 133120
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1756
      • C:\Program Files (x86)\Split Files\SplitFiles118.exe
        "C:\Program Files (x86)\Split Files\SplitFiles118.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:688
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\GNjdc.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1496
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles118.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles118.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1924
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "SplitFiles118.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1236

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Program Files (x86)\Split Files\SplitFiles118.exe

          Filesize

          3.3MB

          MD5

          c7c087a7138c8e4911ae69f7cf6592d9

          SHA1

          8dbc2f9732aaa66f69a4b1f57ca20828eca908c3

          SHA256

          d5132780c6f824d620e59c66c2bbb027b96e2728af13dc2221eb4ee044620a75

          SHA512

          faffd8a3317013b0e78046fdccdbfdc4dcdbe3f60d73acaadee3403d5f0e87de9768b7b91cda327559dc02f8e594e8125f3c0a6dfe8b5bbbfd4d95df5040b1b9

        • C:\Program Files (x86)\Split Files\SplitFiles118.exe

          Filesize

          3.3MB

          MD5

          c7c087a7138c8e4911ae69f7cf6592d9

          SHA1

          8dbc2f9732aaa66f69a4b1f57ca20828eca908c3

          SHA256

          d5132780c6f824d620e59c66c2bbb027b96e2728af13dc2221eb4ee044620a75

          SHA512

          faffd8a3317013b0e78046fdccdbfdc4dcdbe3f60d73acaadee3403d5f0e87de9768b7b91cda327559dc02f8e594e8125f3c0a6dfe8b5bbbfd4d95df5040b1b9

        • C:\Users\Admin\AppData\Local\Temp\is-J3F02.tmp\is-BEJN9.tmp

          Filesize

          723KB

          MD5

          703b4da86c2d38881230d26bc1051cb2

          SHA1

          13b9e7582e94cb6e4f703bc08a28c53cdc003019

          SHA256

          90b8f255f68be9f092608be15074b6fc3c4be724ae82dae5adb390307b121c89

          SHA512

          e3d80bc78b41e24450effe46f713e9bf7fcd376141a3c6b3f20e3ec81c9c3ab85d300104b2dbbef9512f92a2b613dbc326899e442dc669490c1e192f79a7363b

        • C:\Users\Admin\AppData\Local\Temp\is-J3F02.tmp\is-BEJN9.tmp

          Filesize

          723KB

          MD5

          703b4da86c2d38881230d26bc1051cb2

          SHA1

          13b9e7582e94cb6e4f703bc08a28c53cdc003019

          SHA256

          90b8f255f68be9f092608be15074b6fc3c4be724ae82dae5adb390307b121c89

          SHA512

          e3d80bc78b41e24450effe46f713e9bf7fcd376141a3c6b3f20e3ec81c9c3ab85d300104b2dbbef9512f92a2b613dbc326899e442dc669490c1e192f79a7363b

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

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • \Program Files (x86)\Split Files\SplitFiles118.exe

          Filesize

          3.3MB

          MD5

          c7c087a7138c8e4911ae69f7cf6592d9

          SHA1

          8dbc2f9732aaa66f69a4b1f57ca20828eca908c3

          SHA256

          d5132780c6f824d620e59c66c2bbb027b96e2728af13dc2221eb4ee044620a75

          SHA512

          faffd8a3317013b0e78046fdccdbfdc4dcdbe3f60d73acaadee3403d5f0e87de9768b7b91cda327559dc02f8e594e8125f3c0a6dfe8b5bbbfd4d95df5040b1b9

        • \Program Files (x86)\Split Files\SplitFiles118.exe

          Filesize

          3.3MB

          MD5

          c7c087a7138c8e4911ae69f7cf6592d9

          SHA1

          8dbc2f9732aaa66f69a4b1f57ca20828eca908c3

          SHA256

          d5132780c6f824d620e59c66c2bbb027b96e2728af13dc2221eb4ee044620a75

          SHA512

          faffd8a3317013b0e78046fdccdbfdc4dcdbe3f60d73acaadee3403d5f0e87de9768b7b91cda327559dc02f8e594e8125f3c0a6dfe8b5bbbfd4d95df5040b1b9

        • \Program Files (x86)\Split Files\SplitFiles118.exe

          Filesize

          3.3MB

          MD5

          c7c087a7138c8e4911ae69f7cf6592d9

          SHA1

          8dbc2f9732aaa66f69a4b1f57ca20828eca908c3

          SHA256

          d5132780c6f824d620e59c66c2bbb027b96e2728af13dc2221eb4ee044620a75

          SHA512

          faffd8a3317013b0e78046fdccdbfdc4dcdbe3f60d73acaadee3403d5f0e87de9768b7b91cda327559dc02f8e594e8125f3c0a6dfe8b5bbbfd4d95df5040b1b9

        • \Users\Admin\AppData\Local\Temp\is-J3F02.tmp\is-BEJN9.tmp

          Filesize

          723KB

          MD5

          703b4da86c2d38881230d26bc1051cb2

          SHA1

          13b9e7582e94cb6e4f703bc08a28c53cdc003019

          SHA256

          90b8f255f68be9f092608be15074b6fc3c4be724ae82dae5adb390307b121c89

          SHA512

          e3d80bc78b41e24450effe46f713e9bf7fcd376141a3c6b3f20e3ec81c9c3ab85d300104b2dbbef9512f92a2b613dbc326899e442dc669490c1e192f79a7363b

        • \Users\Admin\AppData\Local\Temp\is-QJ3A0.tmp\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • \Users\Admin\AppData\Local\Temp\is-QJ3A0.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Local\Temp\is-QJ3A0.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

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

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/688-92-0x0000000000400000-0x000000000154D000-memory.dmp

          Filesize

          17.3MB

        • memory/688-74-0x0000000001A40000-0x0000000002B8D000-memory.dmp

          Filesize

          17.3MB

        • memory/688-75-0x0000000001A40000-0x0000000002B8D000-memory.dmp

          Filesize

          17.3MB

        • memory/688-76-0x0000000000400000-0x000000000154D000-memory.dmp

          Filesize

          17.3MB

        • memory/688-77-0x0000000000400000-0x000000000154D000-memory.dmp

          Filesize

          17.3MB

        • memory/688-78-0x0000000000400000-0x000000000154D000-memory.dmp

          Filesize

          17.3MB

        • memory/688-96-0x0000000000400000-0x000000000154D000-memory.dmp

          Filesize

          17.3MB

        • memory/688-91-0x0000000001A40000-0x0000000002B8D000-memory.dmp

          Filesize

          17.3MB

        • memory/688-86-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/1260-66-0x0000000000400000-0x0000000000427000-memory.dmp

          Filesize

          156KB

        • memory/1260-54-0x0000000075291000-0x0000000075293000-memory.dmp

          Filesize

          8KB

        • memory/1260-55-0x0000000000400000-0x0000000000427000-memory.dmp

          Filesize

          156KB

        • memory/1260-98-0x0000000000400000-0x0000000000427000-memory.dmp

          Filesize

          156KB

        • memory/1756-90-0x0000000003930000-0x0000000004A7D000-memory.dmp

          Filesize

          17.3MB

        • memory/1756-70-0x0000000003930000-0x0000000004A7D000-memory.dmp

          Filesize

          17.3MB