Analysis

  • max time kernel
    60s
  • max time network
    61s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    10-01-2023 09:17

General

  • Target

    file.exe

  • Size

    1.1MB

  • MD5

    a3a8636edc0cc67cae220bb92125c67b

  • SHA1

    231b6d7a2da1d95bd672a1f60efa95cb4e42f093

  • SHA256

    180f36827740fb634ab470209c5974ecb1a761919767cf4d4172ffbb6d46eedd

  • SHA512

    9961b2f2eab9b46bd0f802c690c25547f3aa6d4310c4019b8a8b3ff5e9effad8962764aa8a8d3ebab4c4a766c22a9ef68d61229a492532b5c1b5daecc26a7462

  • SSDEEP

    24576:R20L3WLP9Bf0GFEprx6zFE79RIPeRYY/K4+FfmBwSkl5l/Hld:R27LP9F/EpFtIGRYYSHl5V

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 6 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 1 IoCs
  • Suspicious use of WriteProcessMemory 23 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:368
    • C:\Users\Admin\AppData\Local\Temp\is-187T6.tmp\file.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-187T6.tmp\file.tmp" /SL5="$60122,884807,51712,C:\Users\Admin\AppData\Local\Temp\file.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:1868
      • C:\Program Files (x86)\Split Files\KitFiles136.exe
        "C:\Program Files (x86)\Split Files\KitFiles136.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1728
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\l4eD8FSid74.exe
          4⤵
          • Executes dropped EXE
          PID:1724
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "KitFiles136.exe" /f & erase "C:\Program Files (x86)\Split Files\KitFiles136.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1692
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "KitFiles136.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1672

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Program Files (x86)\Split Files\KitFiles136.exe

    Filesize

    1.6MB

    MD5

    b6169ced91140aafcbdf0d3fefc61e3b

    SHA1

    e18322a46593db464a28a7bae9a638bb3d127e6b

    SHA256

    e6486388feb99d7cb0ae69a5ded18723aac5dbf206e499610aa74bff3262dc0d

    SHA512

    7442fc3495dc87a8ff422ee0167203a94dbbfd3257dec19ff3020720e1d90f29184d0f0fa34ec5954aa141d90822960b6c7bbf39424fde148d0b495497413486

  • C:\Program Files (x86)\Split Files\KitFiles136.exe

    Filesize

    1.6MB

    MD5

    b6169ced91140aafcbdf0d3fefc61e3b

    SHA1

    e18322a46593db464a28a7bae9a638bb3d127e6b

    SHA256

    e6486388feb99d7cb0ae69a5ded18723aac5dbf206e499610aa74bff3262dc0d

    SHA512

    7442fc3495dc87a8ff422ee0167203a94dbbfd3257dec19ff3020720e1d90f29184d0f0fa34ec5954aa141d90822960b6c7bbf39424fde148d0b495497413486

  • C:\Users\Admin\AppData\Local\Temp\is-187T6.tmp\file.tmp

    Filesize

    692KB

    MD5

    011df348d33aeb3103be711e7aaad000

    SHA1

    eff06d4777d24ab7c2384737b846b7df7c9dd5ae

    SHA256

    4f50389dd834b3268fcc673f791d82a61142eeb7baaa54a03668516df18507ef

    SHA512

    e4b76ac1058880a8ba633f0ff37657594a92231cc6093b80dc6c3617d3edd045f1a3592c2b04cf5acbdbb599d2e4b9e079a47e92692912f4f0d7d189dd14b375

  • C:\Users\Admin\AppData\Local\Temp\is-187T6.tmp\file.tmp

    Filesize

    692KB

    MD5

    011df348d33aeb3103be711e7aaad000

    SHA1

    eff06d4777d24ab7c2384737b846b7df7c9dd5ae

    SHA256

    4f50389dd834b3268fcc673f791d82a61142eeb7baaa54a03668516df18507ef

    SHA512

    e4b76ac1058880a8ba633f0ff37657594a92231cc6093b80dc6c3617d3edd045f1a3592c2b04cf5acbdbb599d2e4b9e079a47e92692912f4f0d7d189dd14b375

  • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\l4eD8FSid74.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Program Files (x86)\Split Files\KitFiles136.exe

    Filesize

    1.6MB

    MD5

    b6169ced91140aafcbdf0d3fefc61e3b

    SHA1

    e18322a46593db464a28a7bae9a638bb3d127e6b

    SHA256

    e6486388feb99d7cb0ae69a5ded18723aac5dbf206e499610aa74bff3262dc0d

    SHA512

    7442fc3495dc87a8ff422ee0167203a94dbbfd3257dec19ff3020720e1d90f29184d0f0fa34ec5954aa141d90822960b6c7bbf39424fde148d0b495497413486

  • \Users\Admin\AppData\Local\Temp\is-187T6.tmp\file.tmp

    Filesize

    692KB

    MD5

    011df348d33aeb3103be711e7aaad000

    SHA1

    eff06d4777d24ab7c2384737b846b7df7c9dd5ae

    SHA256

    4f50389dd834b3268fcc673f791d82a61142eeb7baaa54a03668516df18507ef

    SHA512

    e4b76ac1058880a8ba633f0ff37657594a92231cc6093b80dc6c3617d3edd045f1a3592c2b04cf5acbdbb599d2e4b9e079a47e92692912f4f0d7d189dd14b375

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

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

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

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

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

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\l4eD8FSid74.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/368-87-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/368-68-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/368-54-0x0000000075021000-0x0000000075023000-memory.dmp

    Filesize

    8KB

  • memory/368-55-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/1672-85-0x0000000000000000-mapping.dmp

  • memory/1692-84-0x0000000000000000-mapping.dmp

  • memory/1724-75-0x0000000000000000-mapping.dmp

  • memory/1728-71-0x0000000000400000-0x000000000139B000-memory.dmp

    Filesize

    15.6MB

  • memory/1728-73-0x0000000000400000-0x000000000139B000-memory.dmp

    Filesize

    15.6MB

  • memory/1728-77-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/1728-82-0x0000000000400000-0x000000000139B000-memory.dmp

    Filesize

    15.6MB

  • memory/1728-83-0x0000000000400000-0x000000000139B000-memory.dmp

    Filesize

    15.6MB

  • memory/1728-72-0x0000000000400000-0x000000000139B000-memory.dmp

    Filesize

    15.6MB

  • memory/1728-86-0x0000000000400000-0x000000000139B000-memory.dmp

    Filesize

    15.6MB

  • memory/1728-66-0x0000000000000000-mapping.dmp

  • memory/1868-81-0x00000000035D0000-0x000000000456B000-memory.dmp

    Filesize

    15.6MB

  • memory/1868-70-0x00000000035D0000-0x000000000456B000-memory.dmp

    Filesize

    15.6MB

  • memory/1868-58-0x0000000000000000-mapping.dmp