Overview

overview

10

Static

static

3

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

7

Analysis

  • max time kernel
    76s
  • max time network
    117s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230621-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230621-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/07/2023, 10:32

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General

  • Target
    file.exe
  • Size 1.1MB
  • Sample230702-mkyf3scd2w
  • SHA256 e88259872bb2df0913c156511df3eba707e0a39f520fecd3316654c26cd05334
  • MD5 SHA1 SHA512 SSDEEP
Score
7/10
discovery

Malware Config

Signatures

  • Executes dropped EXE 2 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.

    discovery
  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Runs net.exe
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4864
    • C:\Users\Admin\AppData\Local\Temp\is-VI77T.tmp\is-42ALL.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-VI77T.tmp\is-42ALL.tmp" /SL4 $F016C "C:\Users\Admin\AppData\Local\Temp\file.exe" 929047 73728
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:1260
      • C:\Windows\SysWOW64\net.exe
        "C:\Windows\system32\net.exe" helpmsg 2
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2860
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 helpmsg 2
          4⤵
            PID:4184
        • C:\Program Files (x86)\RejSpacer72\RejSpacer72.exe
          "C:\Program Files (x86)\RejSpacer72\RejSpacer72.exe"
          3⤵
          • Executes dropped EXE
          PID:4028

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          RejSpacer72.exe
          • Path C:\Program Files (x86)\RejSpacer72\RejSpacer72.exe
          • Size 1.1MB
          • SHA256 49fa4406bbbe8a02abf7e818e4712b9cf450277259e6d9c3ee6572b9e8985a0b
          • MD5 SHA1 SHA512 SSDEEP
          Submit Download

          RejSpacer72.exe
          • Path C:\Program Files (x86)\RejSpacer72\RejSpacer72.exe
          • Size 1.1MB
          • SHA256 49fa4406bbbe8a02abf7e818e4712b9cf450277259e6d9c3ee6572b9e8985a0b
          • MD5 SHA1 SHA512 SSDEEP
          Submit Download

          readme.txt
          • Path C:\Program Files (x86)\RejSpacer72\readme.txt
          • Size 4KB
          • SHA256 c8fa111c5b9537e3b6cab9ba763e164e27fa469f2232b82a54b206a7d892b9e9
          • MD5 SHA1 SHA512 SSDEEP
          Submit Download

          _iscrypt.dll
          • Path C:\Users\Admin\AppData\Local\Temp\is-OVVUA.tmp\_isetup\_iscrypt.dll
          • Size 2KB
          • SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
          • MD5 SHA1 SHA512
          Submit Download

          is-42ALL.tmp
          • Path C:\Users\Admin\AppData\Local\Temp\is-VI77T.tmp\is-42ALL.tmp
          • Size 664KB
          • SHA256 31f933169e44b127e3f0a80077a088ed208c2504773a084bfca4de2f53b839c6
          • MD5 SHA1 SHA512 SSDEEP
          Submit Download

          is-42ALL.tmp
          • Path C:\Users\Admin\AppData\Local\Temp\is-VI77T.tmp\is-42ALL.tmp
          • Size 664KB
          • SHA256 31f933169e44b127e3f0a80077a088ed208c2504773a084bfca4de2f53b839c6
          • MD5 SHA1 SHA512 SSDEEP
          Submit Download

          memory/1260-204-0x0000000000650000-0x0000000000651000-memory.dmp
          Download

          memory/1260-324-0x0000000000400000-0x00000000004B5000-memory.dmp
          Download

          memory/4028-323-0x0000000000400000-0x0000000001318000-memory.dmp
          Download

          memory/4864-133-0x0000000000400000-0x0000000000418000-memory.dmp
          Download

          memory/4864-325-0x0000000000400000-0x0000000000418000-memory.dmp
          Download