Analysis

  • max time kernel
    140s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230915-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-09-2023 14:54

General

  • Target

    VAKIFBAN.exe

  • Size

    896KB

  • MD5

    e478fc4b0c1091347240550446e2f7a2

  • SHA1

    2c46e2b777dc7a29c17deaee98534069efa91586

  • SHA256

    6e9331ce6b0ef84031079cf0d10d4f09e389b29c970cbe9f6f1d683eafa9aa52

  • SHA512

    6476b53eeabeea7b97e0af0e41454ff713ba5c625ca2b8a4d211c9fb32ecca847ac85a39b28a0f5ac1a37628708df22da5aea99853b289c1bb911acc435345e3

  • SSDEEP

    12288:GmVjOxbWKVGu27Wm4XfbzsqPhxRAUwQ7xjAkZNPrApR60mR4IQfei08hTrC+iQas:GmVja2iPhhXZq60zD1himaDQ

Malware Config

Extracted

Family

snakekeylogger

Credentials

  • Protocol:
    smtp
  • Host:
    mail.gkas.com.tr
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Gkasteknik@2022

Signatures

  • Snake Keylogger

    Keylogger and Infostealer first seen in November 2020.

  • Snake Keylogger payload 2 IoCs
  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • Looks for VirtualBox Guest Additions in registry 2 TTPs 2 IoCs
  • Looks for VMWare Tools registry key 2 TTPs 2 IoCs
  • Checks BIOS information in registry 2 TTPs 4 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Windows security modification 2 TTPs 3 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Maps connected drives based on registry 3 TTPs 4 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 27 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs
  • System policy modification 1 TTPs 1 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\VAKIFBAN.exe
    "C:\Users\Admin\AppData\Local\Temp\VAKIFBAN.exe"
    1⤵
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Checks computer location settings
    • Adds Run key to start application
    • Maps connected drives based on registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2984
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1532
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:4400
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpDF63.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:760
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:220
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • UAC bypass
        • Windows security bypass
        • Looks for VirtualBox Guest Additions in registry
        • Looks for VMWare Tools registry key
        • Checks BIOS information in registry
        • Checks computer location settings
        • Executes dropped EXE
        • Windows security modification
        • Checks whether UAC is enabled
        • Maps connected drives based on registry
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        • System policy modification
        PID:2632
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\svchost.exe" -Force
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4948
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe"
          4⤵
          • Accesses Microsoft Outlook profiles
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • outlook_office_path
          • outlook_win_path
          PID:2944

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ghgvnglb.y3o.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmpDF63.tmp.bat

    Filesize

    151B

    MD5

    82e9c354a63a54ce56366d4dedff56e3

    SHA1

    53149aaabbef11fe039f0873c38de4d622f01eba

    SHA256

    7394859e0742abc6410faf52adece2946f489acc0ca5dc7a0df61b2c35159b97

    SHA512

    602bfb6d7f06dd8c3788d1e501a363d5e629a91e2104afb315cc2f2c78e9790145dad22f40f10ab5c859ccbfbfed31f625739aedab7c6b5abcdf8a9f4163f5b0

  • C:\Users\Admin\AppData\Roaming\svchost.exe

    Filesize

    896KB

    MD5

    e478fc4b0c1091347240550446e2f7a2

    SHA1

    2c46e2b777dc7a29c17deaee98534069efa91586

    SHA256

    6e9331ce6b0ef84031079cf0d10d4f09e389b29c970cbe9f6f1d683eafa9aa52

    SHA512

    6476b53eeabeea7b97e0af0e41454ff713ba5c625ca2b8a4d211c9fb32ecca847ac85a39b28a0f5ac1a37628708df22da5aea99853b289c1bb911acc435345e3

  • C:\Users\Admin\AppData\Roaming\svchost.exe

    Filesize

    896KB

    MD5

    e478fc4b0c1091347240550446e2f7a2

    SHA1

    2c46e2b777dc7a29c17deaee98534069efa91586

    SHA256

    6e9331ce6b0ef84031079cf0d10d4f09e389b29c970cbe9f6f1d683eafa9aa52

    SHA512

    6476b53eeabeea7b97e0af0e41454ff713ba5c625ca2b8a4d211c9fb32ecca847ac85a39b28a0f5ac1a37628708df22da5aea99853b289c1bb911acc435345e3

  • memory/2632-27-0x00000000745C0000-0x0000000074D70000-memory.dmp

    Filesize

    7.7MB

  • memory/2632-19-0x00000000745C0000-0x0000000074D70000-memory.dmp

    Filesize

    7.7MB

  • memory/2944-73-0x0000000005290000-0x00000000052A0000-memory.dmp

    Filesize

    64KB

  • memory/2944-72-0x00000000745C0000-0x0000000074D70000-memory.dmp

    Filesize

    7.7MB

  • memory/2944-28-0x00000000745C0000-0x0000000074D70000-memory.dmp

    Filesize

    7.7MB

  • memory/2944-29-0x0000000005290000-0x00000000052A0000-memory.dmp

    Filesize

    64KB

  • memory/2944-74-0x0000000000C50000-0x0000000000CA0000-memory.dmp

    Filesize

    320KB

  • memory/2944-75-0x0000000006410000-0x00000000065D2000-memory.dmp

    Filesize

    1.8MB

  • memory/2944-20-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2984-4-0x0000000004C90000-0x0000000004D22000-memory.dmp

    Filesize

    584KB

  • memory/2984-3-0x00000000051A0000-0x0000000005744000-memory.dmp

    Filesize

    5.6MB

  • memory/2984-5-0x0000000004E10000-0x0000000004E20000-memory.dmp

    Filesize

    64KB

  • memory/2984-15-0x00000000745C0000-0x0000000074D70000-memory.dmp

    Filesize

    7.7MB

  • memory/2984-6-0x0000000004C60000-0x0000000004C6A000-memory.dmp

    Filesize

    40KB

  • memory/2984-1-0x00000000745C0000-0x0000000074D70000-memory.dmp

    Filesize

    7.7MB

  • memory/2984-7-0x0000000004DA0000-0x0000000004DE6000-memory.dmp

    Filesize

    280KB

  • memory/2984-2-0x0000000004B50000-0x0000000004BEC000-memory.dmp

    Filesize

    624KB

  • memory/2984-9-0x0000000004FA0000-0x0000000005006000-memory.dmp

    Filesize

    408KB

  • memory/2984-8-0x0000000004F10000-0x0000000004F2A000-memory.dmp

    Filesize

    104KB

  • memory/2984-0-0x00000000000B0000-0x0000000000194000-memory.dmp

    Filesize

    912KB

  • memory/4948-30-0x0000000005370000-0x0000000005392000-memory.dmp

    Filesize

    136KB

  • memory/4948-60-0x0000000007550000-0x000000000756A000-memory.dmp

    Filesize

    104KB

  • memory/4948-26-0x0000000005460000-0x0000000005A88000-memory.dmp

    Filesize

    6.2MB

  • memory/4948-41-0x0000000005D80000-0x00000000060D4000-memory.dmp

    Filesize

    3.3MB

  • memory/4948-42-0x0000000006220000-0x000000000623E000-memory.dmp

    Filesize

    120KB

  • memory/4948-43-0x00000000062D0000-0x000000000631C000-memory.dmp

    Filesize

    304KB

  • memory/4948-44-0x0000000004E20000-0x0000000004E30000-memory.dmp

    Filesize

    64KB

  • memory/4948-45-0x000000007F050000-0x000000007F060000-memory.dmp

    Filesize

    64KB

  • memory/4948-46-0x0000000007420000-0x0000000007452000-memory.dmp

    Filesize

    200KB

  • memory/4948-47-0x0000000070260000-0x00000000702AC000-memory.dmp

    Filesize

    304KB

  • memory/4948-57-0x0000000006810000-0x000000000682E000-memory.dmp

    Filesize

    120KB

  • memory/4948-58-0x0000000007460000-0x0000000007503000-memory.dmp

    Filesize

    652KB

  • memory/4948-59-0x0000000007B90000-0x000000000820A000-memory.dmp

    Filesize

    6.5MB

  • memory/4948-31-0x0000000005AD0000-0x0000000005B36000-memory.dmp

    Filesize

    408KB

  • memory/4948-61-0x00000000075C0000-0x00000000075CA000-memory.dmp

    Filesize

    40KB

  • memory/4948-62-0x00000000077D0000-0x0000000007866000-memory.dmp

    Filesize

    600KB

  • memory/4948-63-0x0000000007750000-0x0000000007761000-memory.dmp

    Filesize

    68KB

  • memory/4948-64-0x0000000007780000-0x000000000778E000-memory.dmp

    Filesize

    56KB

  • memory/4948-65-0x0000000007790000-0x00000000077A4000-memory.dmp

    Filesize

    80KB

  • memory/4948-66-0x0000000007890000-0x00000000078AA000-memory.dmp

    Filesize

    104KB

  • memory/4948-67-0x0000000007870000-0x0000000007878000-memory.dmp

    Filesize

    32KB

  • memory/4948-68-0x00000000745C0000-0x0000000074D70000-memory.dmp

    Filesize

    7.7MB

  • memory/4948-71-0x00000000745C0000-0x0000000074D70000-memory.dmp

    Filesize

    7.7MB

  • memory/4948-25-0x0000000004E20000-0x0000000004E30000-memory.dmp

    Filesize

    64KB

  • memory/4948-24-0x0000000004E20000-0x0000000004E30000-memory.dmp

    Filesize

    64KB

  • memory/4948-23-0x00000000745C0000-0x0000000074D70000-memory.dmp

    Filesize

    7.7MB

  • memory/4948-21-0x0000000004CC0000-0x0000000004CF6000-memory.dmp

    Filesize

    216KB