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Analysis

  • max time kernel
    118s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    25/12/2023, 17:45

General

  • Target

    31f56021ae01c56a3bc9dcd405be538f.exe

  • Size

    142KB

  • MD5

    31f56021ae01c56a3bc9dcd405be538f

  • SHA1

    785a2cffaf018548ec5d134885c6fe36d32ff120

  • SHA256

    4d1d0fc84e8176826b92046082f8edce02a38203e7939e062ee1ffeb09578511

  • SHA512

    33d3a7fd868081e650155097d413511abb079123c80e49476baa01c0bb904d7e2d5575b063a2a707b729976312c9e222a3de7962c3fa4073cfb3c14c3192bb6b

  • SSDEEP

    3072:ynOn7t7XpdpCCTg/sxFgJKeqgKJ+BC1CJB5ubPH4rt636sBue:yKpdcCrTdgKUJB5wPYrUh

Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\31f56021ae01c56a3bc9dcd405be538f.exe
    "C:\Users\Admin\AppData\Local\Temp\31f56021ae01c56a3bc9dcd405be538f.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:3040
    • C:\Users\Admin\AppData\Local\Temp\nsj9697.tmp\downloadmr.exe
      C:\Users\Admin\AppData\Local\Temp\nsj9697.tmp\downloadmr.exe /u4dc9054e-38b0-4614-bdd5-20605bc06f26 /e2406221
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:2664

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Local\Temp\nsj9697.tmp\System.dll

    Filesize

    21KB

    MD5

    5ebc73650256e9c8ddbcda231db829a1

    SHA1

    988d4535e18754ab2a6248abae96c5697d7dbcd5

    SHA256

    1eaa543842df7795404184e8892a1654b0773dbc9bd8b54c7fdb9e68f4355493

    SHA512

    b21266e76fc7263af982a1336a766e47ccf348ed56b305dbb09f03574c9b2a7309f12200e80d86f9a251381be6e87a41206447f11c51899cb31fba10da1d5270

  • \Users\Admin\AppData\Local\Temp\nsj9697.tmp\downloadmr.exe

    Filesize

    122KB

    MD5

    da254a8488b60244654e1cf4d6796cf8

    SHA1

    23d06f4589786652a3a226b5012a5520a3d03452

    SHA256

    6d3b82a7ad74a1e88ae4d0f9176082130f1558fb3ff42a8b45ca8b80445efc2d

    SHA512

    d311f90ad65441f6c7ae55220c2c3f117aa7601d083e6847e1b58b96c3c332d68a25d445310818396dc88678fb9ec5356f35a04a392c3d23746a2231e14b0a2e

  • memory/2664-22-0x0000000000A50000-0x0000000000A90000-memory.dmp

    Filesize

    256KB

  • memory/2664-19-0x0000000074790000-0x0000000074D3B000-memory.dmp

    Filesize

    5.7MB

  • memory/2664-20-0x0000000000A50000-0x0000000000A90000-memory.dmp

    Filesize

    256KB

  • memory/2664-21-0x0000000000A50000-0x0000000000A90000-memory.dmp

    Filesize

    256KB

  • memory/2664-18-0x0000000074790000-0x0000000074D3B000-memory.dmp

    Filesize

    5.7MB

  • memory/2664-23-0x0000000000A50000-0x0000000000A90000-memory.dmp

    Filesize

    256KB

  • memory/2664-24-0x0000000006670000-0x0000000006770000-memory.dmp

    Filesize

    1024KB

  • memory/2664-27-0x0000000074790000-0x0000000074D3B000-memory.dmp

    Filesize

    5.7MB

  • memory/3040-26-0x000000006E3C0000-0x000000006E3CD000-memory.dmp

    Filesize

    52KB

  • memory/3040-25-0x0000000000400000-0x000000000043F000-memory.dmp

    Filesize

    252KB

  • memory/3040-31-0x0000000000400000-0x000000000043F000-memory.dmp

    Filesize

    252KB