Analysis

  • max time kernel
    64s
  • max time network
    68s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    28/12/2022, 23:45

General

  • Target

    c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe

  • Size

    2.0MB

  • MD5

    9368880685abae2eadbdf926805f413f

  • SHA1

    4e1096c5b04be49149d8f9a8cc80a46f25caaa62

  • SHA256

    c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551

  • SHA512

    9e4b64a36807e587e0db0d349735d33fc47cfe8a6232e18316d727b92febef46fcb1ca6f370b28d0e10c6ef900df9e7affdbd556f745ef6c7d2dd008fd40603e

  • SSDEEP

    49152:mivLILS+BVV+OGR2K5OVIMDKDQysyIJmIrdauzdDVUDXKE:miv8RrM77m8QyIJmy8u2

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\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe
    "C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1904
    • C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp" /SL4 $60120 "C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe" 1794182 217600
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1220
      • C:\Program Files (x86)\Split Files\SplitFiles123.exe
        "C:\Program Files (x86)\Split Files\SplitFiles123.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1124
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1668
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles123.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles123.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1324
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "SplitFiles123.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1416

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Program Files (x86)\Split Files\SplitFiles123.exe

    Filesize

    3.2MB

    MD5

    d0f0f4163552b63aed54081a28adf050

    SHA1

    fd67d697f41e714bc8ebec7364d78a012106242a

    SHA256

    da6e6ed6476e3e0a0528ccb94a0992eb3174a251fe68f21d17ecfe6fd0263c40

    SHA512

    6016e806cbbb62d4eca5b1103c8a3ec1d27ce87e4377f30d1087c6d0367c1d9ca90b5ad4ab11cb0f79a550825fb90e3fa19f24b3af2f6f6802bb4da38f3f579b

  • C:\Program Files (x86)\Split Files\SplitFiles123.exe

    Filesize

    3.2MB

    MD5

    d0f0f4163552b63aed54081a28adf050

    SHA1

    fd67d697f41e714bc8ebec7364d78a012106242a

    SHA256

    da6e6ed6476e3e0a0528ccb94a0992eb3174a251fe68f21d17ecfe6fd0263c40

    SHA512

    6016e806cbbb62d4eca5b1103c8a3ec1d27ce87e4377f30d1087c6d0367c1d9ca90b5ad4ab11cb0f79a550825fb90e3fa19f24b3af2f6f6802bb4da38f3f579b

  • C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp

    Filesize

    806KB

    MD5

    4f3db9263ab998737f14cfb0cc7da686

    SHA1

    1f3947a6b5c900f28a93abb7a097aea5efa76f58

    SHA256

    f8ce6681396db8b8a95cdf7dbf02b68c847922aeacd0277a52a4e5ca399f87aa

    SHA512

    60d5207b7af2dadf63aeb6123ed466e779cc9b04ca15f303416b348b8e5ee9c147ee578d5e586df749d1facf460c84090436a0d4944fdebd334373f0f6c18f8d

  • C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp

    Filesize

    806KB

    MD5

    4f3db9263ab998737f14cfb0cc7da686

    SHA1

    1f3947a6b5c900f28a93abb7a097aea5efa76f58

    SHA256

    f8ce6681396db8b8a95cdf7dbf02b68c847922aeacd0277a52a4e5ca399f87aa

    SHA512

    60d5207b7af2dadf63aeb6123ed466e779cc9b04ca15f303416b348b8e5ee9c147ee578d5e586df749d1facf460c84090436a0d4944fdebd334373f0f6c18f8d

  • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Program Files (x86)\Split Files\SplitFiles123.exe

    Filesize

    3.2MB

    MD5

    d0f0f4163552b63aed54081a28adf050

    SHA1

    fd67d697f41e714bc8ebec7364d78a012106242a

    SHA256

    da6e6ed6476e3e0a0528ccb94a0992eb3174a251fe68f21d17ecfe6fd0263c40

    SHA512

    6016e806cbbb62d4eca5b1103c8a3ec1d27ce87e4377f30d1087c6d0367c1d9ca90b5ad4ab11cb0f79a550825fb90e3fa19f24b3af2f6f6802bb4da38f3f579b

  • \Program Files (x86)\Split Files\SplitFiles123.exe

    Filesize

    3.2MB

    MD5

    d0f0f4163552b63aed54081a28adf050

    SHA1

    fd67d697f41e714bc8ebec7364d78a012106242a

    SHA256

    da6e6ed6476e3e0a0528ccb94a0992eb3174a251fe68f21d17ecfe6fd0263c40

    SHA512

    6016e806cbbb62d4eca5b1103c8a3ec1d27ce87e4377f30d1087c6d0367c1d9ca90b5ad4ab11cb0f79a550825fb90e3fa19f24b3af2f6f6802bb4da38f3f579b

  • \Program Files (x86)\Split Files\SplitFiles123.exe

    Filesize

    3.2MB

    MD5

    d0f0f4163552b63aed54081a28adf050

    SHA1

    fd67d697f41e714bc8ebec7364d78a012106242a

    SHA256

    da6e6ed6476e3e0a0528ccb94a0992eb3174a251fe68f21d17ecfe6fd0263c40

    SHA512

    6016e806cbbb62d4eca5b1103c8a3ec1d27ce87e4377f30d1087c6d0367c1d9ca90b5ad4ab11cb0f79a550825fb90e3fa19f24b3af2f6f6802bb4da38f3f579b

  • \Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp

    Filesize

    806KB

    MD5

    4f3db9263ab998737f14cfb0cc7da686

    SHA1

    1f3947a6b5c900f28a93abb7a097aea5efa76f58

    SHA256

    f8ce6681396db8b8a95cdf7dbf02b68c847922aeacd0277a52a4e5ca399f87aa

    SHA512

    60d5207b7af2dadf63aeb6123ed466e779cc9b04ca15f303416b348b8e5ee9c147ee578d5e586df749d1facf460c84090436a0d4944fdebd334373f0f6c18f8d

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

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

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

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

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

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/1124-74-0x0000000000400000-0x0000000001538000-memory.dmp

    Filesize

    17.2MB

  • memory/1124-87-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/1124-75-0x0000000001BA0000-0x0000000002CD8000-memory.dmp

    Filesize

    17.2MB

  • memory/1124-76-0x0000000001BA0000-0x0000000002CD8000-memory.dmp

    Filesize

    17.2MB

  • memory/1124-77-0x0000000000400000-0x0000000001538000-memory.dmp

    Filesize

    17.2MB

  • memory/1124-78-0x0000000000400000-0x0000000001538000-memory.dmp

    Filesize

    17.2MB

  • memory/1124-96-0x0000000000400000-0x0000000001538000-memory.dmp

    Filesize

    17.2MB

  • memory/1124-91-0x0000000000400000-0x0000000001538000-memory.dmp

    Filesize

    17.2MB

  • memory/1124-86-0x0000000000400000-0x0000000001538000-memory.dmp

    Filesize

    17.2MB

  • memory/1220-73-0x0000000003990000-0x0000000004AC8000-memory.dmp

    Filesize

    17.2MB

  • memory/1904-55-0x0000000000400000-0x000000000043B000-memory.dmp

    Filesize

    236KB

  • memory/1904-65-0x0000000000400000-0x000000000043B000-memory.dmp

    Filesize

    236KB

  • memory/1904-54-0x0000000075351000-0x0000000075353000-memory.dmp

    Filesize

    8KB

  • memory/1904-97-0x0000000000400000-0x000000000043B000-memory.dmp

    Filesize

    236KB