Overview

overview

8

Static

static

chthonic_2...ir.exe

windows7_x64

8

chthonic_2...ir.exe

windows10_x64

8

Analysis

  • max time kernel
    148s
  • max time network
    161s
  • platform
    windows7_x64
  • resource
    win7v200430
  • submitted
    19-07-2020 19:28

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General

  • Target

    chthonic_2.23.15.11.vir.exe

  • Size

    324KB

  • MD5

    2b2566bbf2212acb156eea90c6dfe7d1

  • SHA1

    7e20eaacec6eaf3ca5d6a2a526ff47b9cd0faf21

  • SHA256

    9d4746373e81656ca55f49d1b2c93f5d9358bf3c6a31e1a9ae606f26ba273dca

  • SHA512

    a16f9341e3dbf8c7ef4d084dc471e16b84abf9b0698695cc250816d6229214409ccea8fc4cb46b87d976be649f4c46f81829bacce193022117a8bd26bd20083b

Score
8/10
evasiontrojanpersistence

Malware Config

Signatures

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Suspicious behavior: GetForegroundWindowSpam 3 IoCs
  • Suspicious use of SendNotifyMessage 62 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs
  • Executes dropped EXE 1 IoCs
  • Blacklisted process makes network request 5 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
    evasiontrojan
  • Suspicious use of FindShellTrayWindow 62 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\chthonic_2.23.15.11.vir.exe
    "C:\Users\Admin\AppData\Local\Temp\chthonic_2.23.15.11.vir.exe"
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    • Suspicious use of FindShellTrayWindow
    PID:1360
    • C:\Windows\SysWOW64\msiexec.exe
      msiexec.exe
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Adds Run key to start application
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of WriteProcessMemory
      • Blacklisted process makes network request
      • Checks whether UAC is enabled
      PID:1368
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\cMSBuild\cMSBuild.exe"
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1808
        • C:\Users\Admin\AppData\Roaming\cMSBuild\cMSBuild.exe
          C:\Users\Admin\AppData\Roaming\cMSBuild\cMSBuild.exe
          4⤵
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of SendNotifyMessage
          • Suspicious use of WriteProcessMemory
          • Executes dropped EXE
          • Suspicious use of FindShellTrayWindow
          PID:1740
          • C:\Windows\SysWOW64\msiexec.exe
            msiexec.exe
            5⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:796

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Modify Registry

1
T1112

Credential Access

Discovery

System Information Discovery

1
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\cMSBuild\cMSBuild.exe
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  • C:\Users\Admin\AppData\Roaming\cMSBuild\cMSBuild.exe
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  • \Users\Admin\AppData\Roaming\cMSBuild\cMSBuild.exe
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  • \Users\Admin\AppData\Roaming\cMSBuild\cMSBuild.exe
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  • memory/796-7-0x0000000000000000-mapping.dmp
    Download
  • memory/1368-0-0x0000000000000000-mapping.dmp
    Download
  • memory/1740-5-0x0000000000000000-mapping.dmp
    Download
  • memory/1808-1-0x0000000000000000-mapping.dmp
    Download