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working through hash set module

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This commit is contained in:
Greg DiCristofaro 2021-05-13 07:55:59 -04:00
parent a3822f28bf
commit 14a21939a9
1 changed files with 46 additions and 20 deletions
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66
Core/src/org/sleuthkit/autopsy/modules/hashdatabase/HashDbIngestModule.java
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@ -48,6 +48,8 @@ import org.sleuthkit.datamodel.BlackboardAttribute;
import org.sleuthkit.datamodel.BlackboardAttribute.ATTRIBUTE_TYPE;
import org.sleuthkit.datamodel.HashHitInfo;
import org.sleuthkit.datamodel.HashUtility;
import org.sleuthkit.datamodel.Score;
import org.sleuthkit.datamodel.Score.Significance;
import org.sleuthkit.datamodel.SleuthkitCase;
import org.sleuthkit.datamodel.TskCoreException;
import org.sleuthkit.datamodel.TskData;
@ -381,9 +383,8 @@ public class HashDbIngestModule implements FileIngestModule {
totalCount.incrementAndGet();
file.setKnown(statusIfFound);
String hashSetName = db.getDisplayName();
String comment = generateComment(hashInfo);
if (!createArtifactIfNotExists(hashSetName, file, comment, db)) {
if (!createArtifactIfNotExists(file, comment, db)) {
wasError = true;
}
}
@ -426,24 +427,23 @@ public class HashDbIngestModule implements FileIngestModule {
/**
* Creates a BlackboardArtifact if artifact does not already exist.
*
* @param hashSetName The name of the hashset found.
* @param file The file that had a hash hit.
* @param comment The comment to associate with this artifact.
* @param db the database in which this file was found.
*
* @return True if the operation occurred successfully and without error.
*/
private boolean createArtifactIfNotExists(String hashSetName, AbstractFile file, String comment, HashDb db) {
private boolean createArtifactIfNotExists(AbstractFile file, String comment, HashDb db) {
/*
* We have a match. Now create an artifact if it is determined that one
* hasn't been created yet.
*/
List<BlackboardAttribute> attributesList = new ArrayList<>();
attributesList.add(new BlackboardAttribute(ATTRIBUTE_TYPE.TSK_SET_NAME, HashLookupModuleFactory.getModuleName(), hashSetName));
attributesList.add(new BlackboardAttribute(ATTRIBUTE_TYPE.TSK_SET_NAME, HashLookupModuleFactory.getModuleName(), db.getDisplayName()));
try {
Blackboard tskBlackboard = skCase.getBlackboard();
if (tskBlackboard.artifactExists(file, BlackboardArtifact.ARTIFACT_TYPE.TSK_HASHSET_HIT, attributesList) == false) {
postHashSetHitToBlackboard(file, file.getMd5Hash(), hashSetName, comment, db.getSendIngestMessages());
postHashSetHitToBlackboard(file, file.getMd5Hash(), db, comment);
}
} catch (TskCoreException ex) {
logger.log(Level.SEVERE, String.format(
@ -500,31 +500,57 @@ public class HashDbIngestModule implements FileIngestModule {
totals.totalCalctime.addAndGet(delta);
}
/**
* Converts HashDb.KnownFilesType to a Score to be used to create an analysis result.
* @param knownFilesType The HashDb KnownFilesType to convert.
* @return The Score to use when creating an AnalysisResult.
*/
private Score getScore(HashDb.KnownFilesType knownFilesType) {
if (knownFilesType == null) {
return Score.SCORE_UNKNOWN;
}
switch (knownFilesType) {
case KNOWN:
return new Score(Significance.NONE, Score.MethodCategory.AUTO);
case KNOWN_BAD:
return new Score(Significance.NOTABLE, Score.MethodCategory.AUTO);
default:
case NO_CHANGE:
return Score.SCORE_UNKNOWN;
}
}
/**
* Post a hash set hit to the blackboard.
*
* @param abstractFile The file to be processed.
* @param md5Hash The MD5 hash value of the file.
* @param hashSetName The name of the hash set with which to associate
* the hit.
* @param db The database in which this file was found.
* @param comment A comment to be attached to the artifact.
* @param showInboxMessage Show a message in the inbox?
*/
@Messages({
"HashDbIngestModule.indexError.message=Failed to index hashset hit artifact for keyword search."
})
private void postHashSetHitToBlackboard(AbstractFile abstractFile, String md5Hash, String hashSetName, String comment, boolean showInboxMessage) {
private void postHashSetHitToBlackboard(AbstractFile abstractFile, String md5Hash, HashDb db, String comment) {
try {
String moduleName = HashLookupModuleFactory.getModuleName();
BlackboardArtifact badFile = abstractFile.newArtifact(ARTIFACT_TYPE.TSK_HASHSET_HIT);
Collection<BlackboardAttribute> attributes = new ArrayList<>();
//TODO Revisit usage of deprecated constructor as per TSK-583
//BlackboardAttribute att2 = new BlackboardAttribute(ATTRIBUTE_TYPE.TSK_SET_NAME.getTypeID(), MODULE_NAME, "Known Bad", hashSetName);
attributes.add(new BlackboardAttribute(ATTRIBUTE_TYPE.TSK_SET_NAME, moduleName, hashSetName));
attributes.add(new BlackboardAttribute(ATTRIBUTE_TYPE.TSK_HASH_MD5, moduleName, md5Hash));
attributes.add(new BlackboardAttribute(ATTRIBUTE_TYPE.TSK_COMMENT, moduleName, comment));
List<BlackboardAttribute> attributes = Arrays.asList(
new BlackboardAttribute(ATTRIBUTE_TYPE.TSK_SET_NAME, moduleName, db.getDisplayName()),
new BlackboardAttribute(ATTRIBUTE_TYPE.TSK_HASH_MD5, moduleName, md5Hash),
new BlackboardAttribute(ATTRIBUTE_TYPE.TSK_COMMENT, moduleName, comment)
);
badFile.addAttributes(attributes);
String conclusion = TBD;
String configuration = TBD;
String justification = TBD;
// BlackboardArtifact.Type artifactType, Score score, String conclusion, String configuration, String justification, Collection<BlackboardAttribute> attributesList
BlackboardArtifact badFile = abstractFile.newAnalysisResult(
BlackboardArtifact.Type.TSK_HASHSET_HIT, getScore(db.getKnownFilesType()),
conclusion, configuration, justification,
attributes
).getAnalysisResult();
try {
/*
@ -538,7 +564,7 @@ public class HashDbIngestModule implements FileIngestModule {
Bundle.HashDbIngestModule_indexError_message(), badFile.getDisplayName());
}
if (showInboxMessage) {
if (db.getSendIngestMessages()) {
StringBuilder detailsSb = new StringBuilder();
//details
detailsSb.append("<table border='0' cellpadding='4' width='280'>"); //NON-NLS
@ -563,7 +589,7 @@ public class HashDbIngestModule implements FileIngestModule {
detailsSb.append("<th>") //NON-NLS
.append(NbBundle.getMessage(this.getClass(), "HashDbIngestModule.postToBB.hashsetName"))
.append("</th>"); //NON-NLS
detailsSb.append("<td>").append(hashSetName).append("</td>"); //NON-NLS
detailsSb.append("<td>").append(db.getDisplayName()).append("</td>"); //NON-NLS
detailsSb.append("</tr>"); //NON-NLS
detailsSb.append("</table>"); //NON-NLS