Analysis

  • max time kernel
    157s
  • max time network
    236s
  • platform
    windows7_x64
  • resource
    win7v200430
  • submitted
    31-05-2020 03:06

General

  • Target

    751.exe

  • Size

    977KB

  • MD5

    e9232ce72a3cf88a3d1442248275c797

  • SHA1

    80ccfcbb63dc194ddf3762aaff2b8c8a6b49fc94

  • SHA256

    c991fe8c6d840624fbf7b46c88514ff6324fea56997929b0a81d97b0f6eb7f88

  • SHA512

    ef8de903636d21bf80e0348c5a703e8c38325fa05fa23851e34a2608cb4d7ad927963d51f09adc5ec9e5c86140f9a4bdb5473181fbdc675510b3133384914feb

Malware Config

Signatures

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Checks for installed software on the system 1 TTPs 52 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Delays execution with timeout.exe 3 IoCs
  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Looks up external IP address via web service 3 IoCs

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

  • Modifies system certificate store 2 TTPs 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run entry to start application 2 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\751.exe
    "C:\Users\Admin\AppData\Local\Temp\751.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Checks for installed software on the system
    • Suspicious use of WriteProcessMemory
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    PID:1512
    • C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\.cmd""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:560
      • C:\Windows\system32\timeout.exe
        timeout 4
        3⤵
        • Delays execution with timeout.exe
        PID:616
      • C:\Users\Admin\AppData\Local\Temp\Decoder.exe
        "C:\Users\Admin\AppData\Local\Temp\\\Decoder.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious behavior: CmdExeWriteProcessMemorySpam
        • Adds Run entry to start application
        PID:1596
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpDBDD.tmp.cmd""
          4⤵
          • Suspicious use of WriteProcessMemory
          • Loads dropped DLL
          PID:1976
          • C:\Windows\SysWOW64\timeout.exe
            timeout 4
            5⤵
            • Delays execution with timeout.exe
            PID:612
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks.exe /create /f /sc MINUTE /mo 5 /tn "GitHub API Checker v8.82" /tr "'C:\Users\Admin\AppData\Local\Temp\\GitHub API Checker v9.82\GitHubAPIChecker.exe"'
            5⤵
            • Creates scheduled task(s)
            PID:1404
          • C:\Users\Admin\AppData\Local\Temp\GitHub API Checker v9.82\GitHubAPIChecker.exe
            "C:\Users\Admin\AppData\Local\Temp\\GitHub API Checker v9.82\GitHubAPIChecker.exe"
            5⤵
            • Suspicious behavior: AddClipboardFormatListener
            • Executes dropped EXE
            • Modifies system certificate store
            • Suspicious use of AdjustPrivilegeToken
            PID:1076
    • C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp965A.tmp.cmd""
      2⤵
      • Deletes itself
      PID:1144
      • C:\Windows\system32\timeout.exe
        timeout 4
        3⤵
        • Delays execution with timeout.exe
        PID:944

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Install Root Certificate

1
T1130

Modify Registry

2
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

Collection

Data from Local System

1
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
  • C:\Users\Admin\AppData\Local\Temp\.cmd
  • C:\Users\Admin\AppData\Local\Temp\Decoder.exe
  • C:\Users\Admin\AppData\Local\Temp\Decoder.exe
  • C:\Users\Admin\AppData\Local\Temp\GitHub API Checker v9.82\GitHubAPIChecker.exe
  • C:\Users\Admin\AppData\Local\Temp\GitHub API Checker v9.82\GitHubAPIChecker.exe
  • C:\Users\Admin\AppData\Local\Temp\tmp965A.tmp.cmd
  • C:\Users\Admin\AppData\Local\Temp\tmpDBDD.tmp.cmd
  • \Users\Admin\AppData\Local\Temp\GitHub API Checker v9.82\GitHubAPIChecker.exe
  • \Users\Admin\AppData\Local\Temp\GitHub API Checker v9.82\GitHubAPIChecker.exe