Analysis

  • max time kernel
    150s
  • max time network
    190s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/12/2022, 04:32

General

  • Target

    file.exe

  • Size

    3.4MB

  • MD5

    edb3de5cfa0bd7439994d0ea51315705

  • SHA1

    6b78c67a7703a6c86268abed559256b306920ee5

  • SHA256

    0053c150992767a955506ae7f1ea85dd259f221c22de96b90796cf9e940b48e9

  • SHA512

    2318393c60de8b8cfd2912535db543b142665a644e8acb083cb14452387a6a859e22c4d9285628af639571600f15ff36662335582020f58e2922cd41cca17468

  • SSDEEP

    98304:Q/xxFX8M7nu1otBpErA1NhjFqLvBzss2HFAQUrl7qSPpqRwN/gHT9K9iXcyW:cxLX88nuqpR1LjFOsPLUzRqRoIz9KYX6

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 1 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 9 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:224
    • C:\Users\Admin\AppData\Local\Temp\is-JC5D8.tmp\is-S3RFC.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-JC5D8.tmp\is-S3RFC.tmp" /SL4 $601DE "C:\Users\Admin\AppData\Local\Temp\file.exe" 3372768 51712
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:1408
      • C:\Program Files (x86)\PrintFolders\PrintFolders.exe
        "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of WriteProcessMemory
        PID:2084
        • C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\FwInzWtH3EnlhW.exe
          4⤵
          • Executes dropped EXE
          PID:4400

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Program Files (x86)\PrintFolders\PrintFolders.exe

          Filesize

          5.8MB

          MD5

          b3a77a77856560e69fe9e166abc3f7dc

          SHA1

          7e081decde424048041ffc4ceeeee64947edda8a

          SHA256

          2b60e609a0bf39a87f736b391f8c38a7d0e3aef47006536c686c4c059a7b2f4c

          SHA512

          9bd27ef2e8409118f301b9f9db2fa19c44fd031c9a1af470b57c0cb0db2066101f347c4a6957f9c738022bb888a39d0b076978e5d6fdb5e4659e439df5b93be8

        • C:\Program Files (x86)\PrintFolders\PrintFolders.exe

          Filesize

          5.8MB

          MD5

          b3a77a77856560e69fe9e166abc3f7dc

          SHA1

          7e081decde424048041ffc4ceeeee64947edda8a

          SHA256

          2b60e609a0bf39a87f736b391f8c38a7d0e3aef47006536c686c4c059a7b2f4c

          SHA512

          9bd27ef2e8409118f301b9f9db2fa19c44fd031c9a1af470b57c0cb0db2066101f347c4a6957f9c738022bb888a39d0b076978e5d6fdb5e4659e439df5b93be8

        • C:\Users\Admin\AppData\Local\Temp\is-57IHR.tmp\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-JC5D8.tmp\is-S3RFC.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Local\Temp\is-JC5D8.tmp\is-S3RFC.tmp

          Filesize

          643KB

          MD5

          363a4d2aa5d6cf5cbb2267cccf0c4436

          SHA1

          a4cdb756698ed28f522956166a6292e9e309dd9c

          SHA256

          b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

          SHA512

          b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

        • C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\FwInzWtH3EnlhW.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\FwInzWtH3EnlhW.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/224-132-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/224-138-0x0000000000400000-0x0000000000413000-memory.dmp

          Filesize

          76KB

        • memory/2084-142-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB

        • memory/2084-144-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB

        • memory/2084-143-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB

        • memory/2084-148-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB

        • memory/2084-149-0x0000000000400000-0x00000000017C6000-memory.dmp

          Filesize

          19.8MB