Overview

overview

10

Static

static

3

Halkbank_E...15.exe

windows7-x64

10

Halkbank_E...15.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    119s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    11/09/2023, 09:26

Sharing

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General

  • Target
    Halkbank_Ekstre_20230908_170025_496915.exe
  • Size 600KB
  • Sample230911-lejkasfb76
  • SHA256 200451c7cd61830d68c86f7c4ec87af94578ffbe2bea94123764a85cc2a426ca
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
guloaderdownloader

Malware Config

Signatures

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

    downloaderguloader
  • Loads dropped DLL 8 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20230908_170025_496915.exe
    "C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20230908_170025_496915.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:2228
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2228 -s 556
      2⤵
      • Program crash
      PID:272

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        System.dll
        • Path C:\Users\Admin\AppData\Local\Temp\nsd3545.tmp\System.dll
        • Size 12KB
        • SHA256 acf90ab6f4edc687e94aaf604d05e16e6cfb5e35873783b50c66f307a35c6506
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        nsExec.dll
        • Path C:\Users\Admin\AppData\Local\Temp\nsd3545.tmp\nsExec.dll
        • Size 7KB
        • SHA256 c1b7c3ef8b77a5bb335dc9ec9c3546b249014dde43aa2a9ed719b4d5933741df
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        System.dll
        • Path \Users\Admin\AppData\Local\Temp\nsd3545.tmp\System.dll
        • Size 12KB
        • SHA256 acf90ab6f4edc687e94aaf604d05e16e6cfb5e35873783b50c66f307a35c6506
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        System.dll
        • Path \Users\Admin\AppData\Local\Temp\nsd3545.tmp\System.dll
        • Size 12KB
        • SHA256 acf90ab6f4edc687e94aaf604d05e16e6cfb5e35873783b50c66f307a35c6506
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        nsExec.dll
        • Path \Users\Admin\AppData\Local\Temp\nsd3545.tmp\nsExec.dll
        • Size 7KB
        • SHA256 c1b7c3ef8b77a5bb335dc9ec9c3546b249014dde43aa2a9ed719b4d5933741df
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        nsExec.dll
        • Path \Users\Admin\AppData\Local\Temp\nsd3545.tmp\nsExec.dll
        • Size 7KB
        • SHA256 c1b7c3ef8b77a5bb335dc9ec9c3546b249014dde43aa2a9ed719b4d5933741df
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        nsExec.dll
        • Path \Users\Admin\AppData\Local\Temp\nsd3545.tmp\nsExec.dll
        • Size 7KB
        • SHA256 c1b7c3ef8b77a5bb335dc9ec9c3546b249014dde43aa2a9ed719b4d5933741df
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        nsExec.dll
        • Path \Users\Admin\AppData\Local\Temp\nsd3545.tmp\nsExec.dll
        • Size 7KB
        • SHA256 c1b7c3ef8b77a5bb335dc9ec9c3546b249014dde43aa2a9ed719b4d5933741df
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        nsExec.dll
        • Path \Users\Admin\AppData\Local\Temp\nsd3545.tmp\nsExec.dll
        • Size 7KB
        • SHA256 c1b7c3ef8b77a5bb335dc9ec9c3546b249014dde43aa2a9ed719b4d5933741df
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        nsExec.dll
        • Path \Users\Admin\AppData\Local\Temp\nsd3545.tmp\nsExec.dll
        • Size 7KB
        • SHA256 c1b7c3ef8b77a5bb335dc9ec9c3546b249014dde43aa2a9ed719b4d5933741df
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        memory/2228-38-0x00000000037A0000-0x000000000652A000-memory.dmp
        Download

        memory/2228-39-0x00000000037A0000-0x000000000652A000-memory.dmp
        Download