Analysis

  • max time kernel
    120s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/11/2024, 00:01

General

  • Target
    7bf69188ae195642b23a8903128726200413395d607643f85fd8921ada3919e0.exe
  • Size 9.4MB
  • Sample241114-abc3kasajr
  • SHA256 7bf69188ae195642b23a8903128726200413395d607643f85fd8921ada3919e0
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 3 IoCs
  • UAC bypass 3 TTPs 12 IoCs
  • Adds policy Run key to start application 2 TTPs 23 IoCs
  • Disables RegEdit via registry modification 6 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Impair Defenses: Safe Mode Boot 1 TTPs 6 IoCs
  • Adds Run key to start application 2 TTPs 64 IoCs
  • Checks whether UAC is enabled 1 TTPs 6 IoCs
  • Hijack Execution Flow: Executable Installer File Permissions Weakness 1 TTPs 3 IoCs

    Possible Turn off User Account Control's privilege elevation for standard users.

  • Looks up external IP address via web service 6 IoCs

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

  • Drops file in System32 directory 4 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs
  • System policy modification 1 TTPs 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7bf69188ae195642b23a8903128726200413395d607643f85fd8921ada3919e0.exe
    "C:\Users\Admin\AppData\Local\Temp\7bf69188ae195642b23a8903128726200413395d607643f85fd8921ada3919e0.exe"
    1⤵
    • Modifies WinLogon for persistence
    • UAC bypass
    • Adds policy Run key to start application
    • Disables RegEdit via registry modification
    • Checks computer location settings
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Hijack Execution Flow: Executable Installer File Permissions Weakness
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:4040
    • C:\Users\Admin\AppData\Local\Temp\chgru.exe
      "C:\Users\Admin\AppData\Local\Temp\chgru.exe" "-"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Impair Defenses: Safe Mode Boot
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Hijack Execution Flow: Executable Installer File Permissions Weakness
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • System policy modification
      PID:812
    • C:\Users\Admin\AppData\Local\Temp\chgru.exe
      "C:\Users\Admin\AppData\Local\Temp\chgru.exe" "-"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Hijack Execution Flow: Executable Installer File Permissions Weakness
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious behavior: GetForegroundWindowSpam
      • System policy modification
      PID:1032
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:4864

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          chgrucfljprulkpbhsotsdgorxv.dgx

          • Path C:\Program Files (x86)\chgrucfljprulkpbhsotsdgorxv.dgx
          • Size 272B
          • SHA256 eed99bb98fce31271fd8cddd65e441d3fe3721d4493ad80a069d556c1ae35c48
          • MD5 SHA1 SHA512

          chgrucfljprulkpbhsotsdgorxv.dgx

          • Path C:\Program Files (x86)\chgrucfljprulkpbhsotsdgorxv.dgx
          • Size 272B
          • SHA256 00609e81039dee1922a83cf922446d342940690fab5f5c88ccc0b360fc221c1b
          • MD5 SHA1 SHA512

          chgrucfljprulkpbhsotsdgorxv.dgx

          • Path C:\Program Files (x86)\chgrucfljprulkpbhsotsdgorxv.dgx
          • Size 272B
          • SHA256 bcdb10661e9eef6614aa26d9a26aec739edfe18fd23f657e795793cc599d3712
          • MD5 SHA1 SHA512

          chgrucfljprulkpbhsotsdgorxv.dgx

          • Path C:\Program Files (x86)\chgrucfljprulkpbhsotsdgorxv.dgx
          • Size 272B
          • SHA256 8b4ff85a2a515ecefe847aebcb55edef01b1eef8187c2ac407bf0e3cca75e353
          • MD5 SHA1 SHA512

          chgrucfljprulkpbhsotsdgorxv.dgx

          • Path C:\Program Files (x86)\chgrucfljprulkpbhsotsdgorxv.dgx
          • Size 272B
          • SHA256 986e2aa5c888275ad7785f6d9c1de87a05e8ebbd2add563dbdc3c38e3dce321b
          • MD5 SHA1 SHA512

          chgrucfljprulkpbhsotsdgorxv.dgx

          • Path C:\Program Files (x86)\chgrucfljprulkpbhsotsdgorxv.dgx
          • Size 272B
          • SHA256 c17d35a63e7a012af473c304b9f6f9291f66a7e59eaf883b37ad414d23683180
          • MD5 SHA1 SHA512

          chgru.exe

          • Path C:\Users\Admin\AppData\Local\Temp\chgru.exe
          • Size 11.5MB
          • SHA256 cd83123c94b45409b84d82f6fc5264be7d95676d558669f3da9d130c99214a41
          • MD5 SHA1 SHA512 SSDEEP

          chgrucfljprulkpbhsotsdgorxv.dgx

          • Path C:\Users\Admin\AppData\Local\chgrucfljprulkpbhsotsdgorxv.dgx
          • Size 272B
          • SHA256 32e8124bb5e486da9f66b2921339891747e6f1cd56583d42887a818900345b95
          • MD5 SHA1 SHA512

          zpzvjcqhqhuikukhyubrbxlesjsjwkmwmjawdt.zng

          • Path C:\Users\Admin\AppData\Local\zpzvjcqhqhuikukhyubrbxlesjsjwkmwmjawdt.zng
          • Size 3KB
          • SHA256 6411d5ef118e2cf6a332cf884e5c645eefec783cd73e4ad7ddc7193907fd0477
          • MD5 SHA1 SHA512