Malware Analysis Report

2024-12-07 20:45

Sample ID 230623-b8r4esce4w
Target Inventory List.jar
SHA256 924c2bc4af402c80d0d9840cb97ced94cf09755df952c02f43d0f23b5f6ed657
Tags
strrat persistence stealer trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

924c2bc4af402c80d0d9840cb97ced94cf09755df952c02f43d0f23b5f6ed657

Threat Level: Known bad

The file Inventory List.jar was found to be: Known bad.

Malicious Activity Summary

strrat persistence stealer trojan

STRRAT

Drops startup file

Adds Run key to start application

Uses Task Scheduler COM API

Creates scheduled task(s)

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-06-23 01:49

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-06-23 01:49

Reported

2023-06-23 01:51

Platform

win7-20230621-en

Max time kernel

142s

Max time network

151s

Command Line

java -jar "C:\Users\Admin\AppData\Local\Temp\Inventory List.jar"

Signatures

N/A

Processes

C:\Windows\system32\java.exe

java -jar "C:\Users\Admin\AppData\Local\Temp\Inventory List.jar"

Network

Country Destination Domain Proto
US 8.8.8.8:53 repo1.maven.org udp
US 8.8.8.8:53 github.com udp
US 199.232.192.209:443 repo1.maven.org tcp
US 199.232.192.209:443 repo1.maven.org tcp
US 199.232.192.209:443 repo1.maven.org tcp
US 140.82.112.4:443 github.com tcp
US 8.8.8.8:53 repo1.maven.org udp
US 8.8.8.8:53 github.com udp
US 199.232.192.209:443 repo1.maven.org tcp
US 199.232.192.209:443 repo1.maven.org tcp
US 199.232.192.209:443 repo1.maven.org tcp
US 140.82.112.4:443 github.com tcp

Files

memory/872-63-0x0000000000120000-0x0000000000121000-memory.dmp

memory/872-64-0x0000000000120000-0x0000000000121000-memory.dmp

memory/872-68-0x0000000000120000-0x0000000000121000-memory.dmp

memory/872-92-0x0000000000120000-0x0000000000121000-memory.dmp

memory/872-110-0x0000000000120000-0x0000000000121000-memory.dmp

memory/872-120-0x0000000000120000-0x0000000000121000-memory.dmp

memory/872-125-0x0000000000120000-0x0000000000121000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-06-23 01:49

Reported

2023-06-23 01:51

Platform

win10v2004-20230621-en

Max time kernel

149s

Max time network

134s

Command Line

java -jar "C:\Users\Admin\AppData\Local\Temp\Inventory List.jar"

Signatures

STRRAT

trojan stealer strrat

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Inventory List.jar C:\Program Files\Java\jre1.8.0_66\bin\java.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-4129409437-3162877118-52503038-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Inventory List = "\"C:\\Program Files\\Java\\jre1.8.0_66\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\Inventory List.jar\"" C:\Program Files\Java\jre1.8.0_66\bin\java.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Inventory List = "\"C:\\Program Files\\Java\\jre1.8.0_66\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\Inventory List.jar\"" C:\Program Files\Java\jre1.8.0_66\bin\java.exe N/A

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\system32\schtasks.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\ProgramData\Oracle\Java\javapath\java.exe

java -jar "C:\Users\Admin\AppData\Local\Temp\Inventory List.jar"

C:\Program Files\Java\jre1.8.0_66\bin\java.exe

"C:\Program Files\Java\jre1.8.0_66\bin\java.exe" -jar "C:\Users\Admin\Inventory List.jar"

C:\Windows\SYSTEM32\cmd.exe

cmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\Inventory List.jar"

C:\Program Files\Java\jre1.8.0_66\bin\java.exe

"C:\Program Files\Java\jre1.8.0_66\bin\java.exe" -jar "C:\Users\Admin\AppData\Roaming\Inventory List.jar"

C:\Windows\system32\schtasks.exe

schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\Inventory List.jar"

Network

Country Destination Domain Proto
US 8.8.8.8:53 repo1.maven.org udp
US 8.8.8.8:53 github.com udp
US 140.82.114.3:443 github.com tcp
US 199.232.192.209:443 repo1.maven.org tcp
US 199.232.192.209:443 repo1.maven.org tcp
US 199.232.192.209:443 repo1.maven.org tcp
US 8.8.8.8:53 3.114.82.140.in-addr.arpa udp
US 8.8.8.8:53 209.192.232.199.in-addr.arpa udp
GB 96.16.110.41:443 tcp
US 20.189.173.4:443 tcp
US 8.8.8.8:53 objects.githubusercontent.com udp
US 185.199.108.133:443 objects.githubusercontent.com tcp
US 8.8.8.8:53 62.13.109.52.in-addr.arpa udp
US 8.8.8.8:53 133.108.199.185.in-addr.arpa udp

Files

memory/2660-143-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-157-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-168-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-179-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-185-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-186-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-194-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-195-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-197-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-199-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-202-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-210-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-211-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-212-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-213-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-221-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-223-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-226-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-229-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-233-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

memory/2660-241-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

C:\Users\Admin\Inventory List.jar

MD5 4528ca1cd5111138dbd966f65aa18fd4
SHA1 51288703a62480e7a80fc6e2f43d96f230324537
SHA256 924c2bc4af402c80d0d9840cb97ced94cf09755df952c02f43d0f23b5f6ed657
SHA512 7a45b93c648bdda6b42853face3e41f39ae057aa136af0d664bb31c8f8e09d4ab8534e15d833f8dfacad3b6bb538343dd942855ed3f9b7010691ffef4db9077c

C:\Users\Admin\.oracle_jre_usage\90737d32e3aba4b.timestamp

MD5 40036d860061e8d2bfb840a957e12e14
SHA1 e42df3b81f8765c4efe63e88ec85b0cd7b6a8bf5
SHA256 c60d28e9968b968dc73700f9d81b0b278468d6eac98c7adefb5a9a42ccd85439
SHA512 8f5feebdb7373472c98d1fe2145779425ce2d2238c22c23212e76bf083d55c424a78d3ca5e80d8d732e0a493412a952875bda5fd81b6d77ffd78b97afeecfc96

C:\Users\Admin\lib\sqlite-jdbc-3.14.2.1.jar

MD5 b33387e15ab150a7bf560abdc73c3bec
SHA1 66b8075784131f578ef893fd7674273f709b9a4c
SHA256 2eae3dea1c3dde6104c49f9601074b6038ff6abcf3be23f4b56f6720a4f6a491
SHA512 25cfb0d6ce35d0bcb18527d3aa12c63ecb2d9c1b8b78805d1306e516c13480b79bb0d74730aa93bd1752f9ac2da9fdd51781c48844cea2fd52a06c62852c8279

C:\Users\Admin\lib\jna-platform-5.5.0.jar

MD5 2f4a99c2758e72ee2b59a73586a2322f
SHA1 af38e7c4d0fc73c23ecd785443705bfdee5b90bf
SHA256 24d81621f82ac29fcdd9a74116031f5907a2343158e616f4573bbfa2434ae0d5
SHA512 b860459a0d3bf7ccb600a03aa1d2ac0358619ee89b2b96ed723541e182b6fdab53aefef7992acb4e03fca67aa47cbe3907b1e6060a60b57ed96c4e00c35c7494

C:\Users\Admin\lib\jna-5.5.0.jar

MD5 acfb5b5fd9ee10bf69497792fd469f85
SHA1 0e0845217c4907822403912ad6828d8e0b256208
SHA256 b308faebfe4ed409de8410e0a632d164b2126b035f6eacff968d3908cafb4d9e
SHA512 e52575f58a195ceb3bd16b9740eadf5bc5b1d4d63c0734e8e5fd1d1776aa2d068d2e4c7173b83803f95f72c0a6759ae1c9b65773c734250d4cfcdf47a19f82aa

C:\Users\Admin\lib\system-hook-3.5.jar

MD5 e1aa38a1e78a76a6de73efae136cdb3a
SHA1 c463da71871f780b2e2e5dba115d43953b537daf
SHA256 2ddda8af6faef8bde46acf43ec546603180bcf8dcb2e5591fff8ac9cd30b5609
SHA512 fee16fe9364926ec337e52f551fd62ed81984808a847de2fd68ff29b6c5da0dcc04ef6d8977f0fe675662a7d2ea1065cdcdd2a5259446226a7c7c5516bd7d60d

memory/912-258-0x0000000000C80000-0x0000000000C81000-memory.dmp

C:\Users\Admin\AppData\Roaming\Inventory List.jar

MD5 4528ca1cd5111138dbd966f65aa18fd4
SHA1 51288703a62480e7a80fc6e2f43d96f230324537
SHA256 924c2bc4af402c80d0d9840cb97ced94cf09755df952c02f43d0f23b5f6ed657
SHA512 7a45b93c648bdda6b42853face3e41f39ae057aa136af0d664bb31c8f8e09d4ab8534e15d833f8dfacad3b6bb538343dd942855ed3f9b7010691ffef4db9077c

C:\Users\Admin\AppData\Roaming\Inventory List.jar

MD5 4528ca1cd5111138dbd966f65aa18fd4
SHA1 51288703a62480e7a80fc6e2f43d96f230324537
SHA256 924c2bc4af402c80d0d9840cb97ced94cf09755df952c02f43d0f23b5f6ed657
SHA512 7a45b93c648bdda6b42853face3e41f39ae057aa136af0d664bb31c8f8e09d4ab8534e15d833f8dfacad3b6bb538343dd942855ed3f9b7010691ffef4db9077c