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some fixes

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This commit is contained in:
Namhyeon Go 2024-08-12 13:00:04 +09:00
parent 58d1829c9c
commit 2631a8f577
4 changed files with 74 additions and 37 deletions
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37
WelsonJS.Toolkit/WelsonJS.Service/FileEventMonitor.cs
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@ -19,9 +19,16 @@ namespace WelsonJS.Service
public FileEventMonitor(ServiceBase parent, string workingDirectory) public FileEventMonitor(ServiceBase parent, string workingDirectory)
{ {
this.parent = (ServiceMain)parent; this.parent = (ServiceMain)parent;
this.ruleFolderPath = Path.Combine(workingDirectory, "app/assets/yar"); ruleFolderPath = Path.Combine(workingDirectory, "app/assets/yar");
AddYaraRules(new List<string>(Directory.GetFiles(this.ruleFolderPath, "*.yar"))); try
{
AddYaraRules(new List<string>(Directory.GetFiles(ruleFolderPath, "*.yar")));
}
catch (Exception ex)
{
this.parent.Log($"Exception (FileEventMonitor): {ex.Message}");
}
} }
public void AddYaraRulesFromDirectory(string directoryPath) public void AddYaraRulesFromDirectory(string directoryPath)
@ -71,17 +78,25 @@ namespace WelsonJS.Service
public void Start() public void Start()
{ {
string query = @"<QueryList> try
<Query Id='0' Path='Microsoft-Windows-Sysmon/Operational'> {
<Select Path='Microsoft-Windows-Sysmon/Operational'>*[System/EventID=11]</Select> string query = @"<QueryList>
</Query> <Query Id='0' Path='Microsoft-Windows-Sysmon/Operational'>
</QueryList>"; <Select Path='Microsoft-Windows-Sysmon/Operational'>*[System/EventID=11]</Select>
</Query>
</QueryList>";
EventLogQuery eventLogQuery = new EventLogQuery("Microsoft-Windows-Sysmon/Operational", PathType.LogName, query); EventLogQuery eventLogQuery = new EventLogQuery("Microsoft-Windows-Sysmon/Operational", PathType.LogName, query);
eventLogWatcher = new EventLogWatcher(eventLogQuery); eventLogWatcher = new EventLogWatcher(eventLogQuery);
eventLogWatcher.EventRecordWritten += new EventHandler<EventRecordWrittenEventArgs>(OnEventRecordWritten); eventLogWatcher.EventRecordWritten += new EventHandler<EventRecordWrittenEventArgs>(OnEventRecordWritten);
eventLogWatcher.Enabled = true; eventLogWatcher.Enabled = true;
}
catch (Exception ex)
{
parent.Log($"Exception (FileEventMonitor): {ex.Message}");
Stop();
}
} }
public void Stop() public void Stop()

18
WelsonJS.Toolkit/WelsonJS.Service/ScreenMatching.cs
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@ -59,20 +59,30 @@ public class ScreenMatching
public ScreenMatching(ServiceBase parent, string workingDirectory) public ScreenMatching(ServiceBase parent, string workingDirectory)
{ {
this.parent = (ServiceMain)parent; this.parent = (ServiceMain)parent;
this.templateFolderPath = Path.Combine(workingDirectory, "app/assets/img/_templates"); templateFolderPath = Path.Combine(workingDirectory, "app/assets/img/_templates");
this.templateImages = new List<Bitmap>(); templateImages = new List<Bitmap>();
LoadTemplateImages(); LoadTemplateImages();
} }
public void LoadTemplateImages() public void LoadTemplateImages()
{ {
var files = System.IO.Directory.GetFiles(templateFolderPath, "*.png"); string[] files;
try
{
files = Directory.GetFiles(templateFolderPath, "*.png");
}
catch (Exception ex)
{
files = new string[] { };
parent.Log($"Exception (ScreenMatching): {ex.Message}");
}
foreach (var file in files) foreach (var file in files)
{ {
Bitmap bitmap = new Bitmap(file); Bitmap bitmap = new Bitmap(file);
bitmap.Tag = System.IO.Path.GetFileName(file); bitmap.Tag = Path.GetFileName(file);
templateImages.Add(bitmap); templateImages.Add(bitmap);
} }
} }

22
app/assets/yar/MALW_Eicar.yar
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@ -1,22 +0,0 @@
rule malw_eicar {
meta:
description = "Rule to detect the EICAR pattern"
author = "Marc Rivero | McAfee ATR Team"
reference = "https://www.eicar.org/"
rule_version = "v1"
malware_type = "eicar"
malware_family = "W32/Eicar"
actor_type = "Unknown"
actor_group = "Unknown"
hash = "275a021bbfb6489e54d471899f7db9d1663fc695ec2fe2a2c4538aabf651fd0f"
strings:
$s1 = "X5O!P%@AP[4\\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*" fullword ascii
condition:
any of them
}

34
app/assets/yar/eicar.yara Normal file
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@ -0,0 +1,34 @@
rule eicar_av_test {
/*
Per standard, match only if entire file is EICAR string plus optional trailing whitespace.
The raw EICAR string to be matched is:
X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*
*/
meta:
description = "This is a standard AV test, intended to verify that BinaryAlert is working correctly."
author = "Austin Byers | Airbnb CSIRT"
reference = "http://www.eicar.org/86-0-Intended-use.html"
strings:
$eicar_regex = /^X5O!P%@AP\[4\\PZX54\(P\^\)7CC\)7\}\$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!\$H\+H\*\s*$/
condition:
all of them
}
rule eicar_substring_test {
/*
More generic - match just the embedded EICAR string (e.g. in packed executables, PDFs, etc)
*/
meta:
description = "Standard AV test, checking for an EICAR substring"
author = "Austin Byers | Airbnb CSIRT"
strings:
$eicar_substring = "$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!"
condition:
all of them
}