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Analysis

  • max time kernel
    90s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/10/2022, 15:01

General

  • Target

    file.exe

  • Size

    2.4MB

  • MD5

    5125c8c7d24bc25c87cf23084a964820

  • SHA1

    7216db1d7a2a818767fdebe866f3444de2bc4213

  • SHA256

    291618a72c8fcc5ff05f289b1ff9248fd127e75057aa7091b070935f1405834a

  • SHA512

    4d16f43e85b864e01f7bbb087543a236804b7e34c0b90a5524bcfbf3b271cab76d93b2f598f54967da165c270411682bfa518f818392516dbb116e1aa9c05487

  • SSDEEP

    49152:Z2omzyhRyo2SqQak7RUa73vBgUXRoRV2Cgr9u4bvFsa0cmeTA5hq:MoksrPqE1N7fBpRSV2hwkvM3Dq

Score
10/10

Malware Config

Extracted

Family

nymaim

C2

45.15.156.54

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
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 12 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 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4740
    • C:\Users\Admin\AppData\Local\Temp\is-FTK1C.tmp\is-KSEDB.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-FTK1C.tmp\is-KSEDB.tmp" /SL4 $801D6 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2302895 52736
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:820
      • C:\Program Files (x86)\ehSearcher\ehsearcher52.exe
        "C:\Program Files (x86)\ehSearcher\ehsearcher52.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:4352
        • C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\U0YGzPe6Age5H.exe
          4⤵
          • Executes dropped EXE
          PID:2508
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "ehsearcher52.exe" /f & erase "C:\Program Files (x86)\ehSearcher\ehsearcher52.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3620
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "ehsearcher52.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:3516

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Program Files (x86)\ehSearcher\ehsearcher52.exe

    Filesize

    4.0MB

    MD5

    0d6cc1d0591efeb1f882ce68615ea8a7

    SHA1

    12fea6e2ca09344988eac4745ee637f4b4befc08

    SHA256

    75ba3f2e977347333766cb0f5cccdca6e96d260523ba4b2dd01e39c6fcccdb0a

    SHA512

    7bbcbd57829df3f1df8151c04e74f703749b4d05c30df5ac0db6efc5e5d63899ecb6e3270cabe665493001cebc2f61bf1820d25b443664c77771f565a27cfdc9

  • C:\Program Files (x86)\ehSearcher\ehsearcher52.exe

    Filesize

    4.0MB

    MD5

    0d6cc1d0591efeb1f882ce68615ea8a7

    SHA1

    12fea6e2ca09344988eac4745ee637f4b4befc08

    SHA256

    75ba3f2e977347333766cb0f5cccdca6e96d260523ba4b2dd01e39c6fcccdb0a

    SHA512

    7bbcbd57829df3f1df8151c04e74f703749b4d05c30df5ac0db6efc5e5d63899ecb6e3270cabe665493001cebc2f61bf1820d25b443664c77771f565a27cfdc9

  • C:\Users\Admin\AppData\Local\Temp\is-7JKNC.tmp\_isetup\_iscrypt.dll

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Local\Temp\is-FTK1C.tmp\is-KSEDB.tmp

    Filesize

    657KB

    MD5

    7cd12c54a9751ca6eee6ab0c85fb68f5

    SHA1

    76562e9b7888b6d20d67addb5a90b68b54a51987

    SHA256

    e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

    SHA512

    27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

  • C:\Users\Admin\AppData\Local\Temp\is-FTK1C.tmp\is-KSEDB.tmp

    Filesize

    657KB

    MD5

    7cd12c54a9751ca6eee6ab0c85fb68f5

    SHA1

    76562e9b7888b6d20d67addb5a90b68b54a51987

    SHA256

    e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

    SHA512

    27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

  • C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\U0YGzPe6Age5H.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\U0YGzPe6Age5H.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/4352-151-0x0000000000400000-0x00000000015F8000-memory.dmp

    Filesize

    18.0MB

  • memory/4352-143-0x0000000000400000-0x00000000015F8000-memory.dmp

    Filesize

    18.0MB

  • memory/4352-142-0x0000000000400000-0x00000000015F8000-memory.dmp

    Filesize

    18.0MB

  • memory/4352-147-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/4352-154-0x0000000000400000-0x00000000015F8000-memory.dmp

    Filesize

    18.0MB

  • memory/4740-132-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/4740-138-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/4740-155-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB