Malware Analysis Report

2024-11-13 18:33

Sample ID 231012-h9svnsfh97
Target check.zip
SHA256 910a06eb5fdf8c9fc6cddfa76ce6359f4d5d459507a2be8d458ada1ecef9c1f6
Tags
strrat persistence stealer trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

910a06eb5fdf8c9fc6cddfa76ce6359f4d5d459507a2be8d458ada1ecef9c1f6

Threat Level: Known bad

The file check.zip was found to be: Known bad.

Malicious Activity Summary

strrat persistence stealer trojan

STRRAT

Checks computer location settings

Drops startup file

Loads dropped DLL

Adds Run key to start application

Drops file in Program Files directory

Enumerates physical storage devices

Creates scheduled task(s)

Uses Task Scheduler COM API

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-10-12 07:26

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-10-12 07:26

Reported

2023-10-13 13:54

Platform

win7-20230831-en

Max time kernel

122s

Max time network

127s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\b8416d71e5a4bd1cc48552152bbbce450009ca04a6891823de3067af57c1559a.js

Signatures

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2944 wrote to memory of 2140 N/A C:\Windows\system32\wscript.exe C:\Program Files\Java\jre7\bin\javaw.exe
PID 2944 wrote to memory of 2140 N/A C:\Windows\system32\wscript.exe C:\Program Files\Java\jre7\bin\javaw.exe
PID 2944 wrote to memory of 2140 N/A C:\Windows\system32\wscript.exe C:\Program Files\Java\jre7\bin\javaw.exe

Processes

C:\Windows\system32\wscript.exe

wscript.exe C:\Users\Admin\AppData\Local\Temp\b8416d71e5a4bd1cc48552152bbbce450009ca04a6891823de3067af57c1559a.js

C:\Program Files\Java\jre7\bin\javaw.exe

"C:\Program Files\Java\jre7\bin\javaw.exe" -jar "C:\Users\Admin\AppData\Roaming\rmknliuhi.txt"

Network

N/A

Files

C:\Users\Admin\AppData\Roaming\rmknliuhi.txt

MD5 c7fff6f9adc6a624b2dcb9651c3b3567
SHA1 6912bf0f6924e47e88eb976214b4c4cd22f8e863
SHA256 0b7805864d52d9023f35762740194c4bcb7a01c38e9db071cc7526dca68253fd
SHA512 979ff8489c59c4e076113daa51a545cc4ab2b969e5d9b4ad2982eebc6cf2199852b70aa2d721277211ca0eb5664ba364b6bd5a4092f62dea98a1afc8d04c3c61

memory/2140-4-0x0000000002290000-0x0000000005290000-memory.dmp

memory/2140-7-0x0000000002290000-0x0000000005290000-memory.dmp

memory/2140-13-0x0000000000210000-0x0000000000211000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-10-12 07:26

Reported

2023-10-13 13:54

Platform

win10v2004-20230915-en

Max time kernel

175s

Max time network

180s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\b8416d71e5a4bd1cc48552152bbbce450009ca04a6891823de3067af57c1559a.js

Signatures

STRRAT

trojan stealer strrat

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-919254492-3979293997-764407192-1000\Control Panel\International\Geo\Nation C:\Windows\system32\wscript.exe N/A

Drops startup file

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

Loads dropped DLL

Description Indicator Process Target
N/A N/A 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-1-5-21-919254492-3979293997-764407192-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\qhzgrvso = "\"C:\\Users\\Admin\\AppData\\Roaming\\qhzgrvso.txt\"" C:\Program Files\Java\jre1.8.0_66\bin\java.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\qhzgrvso = "\"C:\\Users\\Admin\\AppData\\Roaming\\qhzgrvso.txt\"" C:\Program Files\Java\jre1.8.0_66\bin\java.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File opened for modification C:\Program Files\Java\jre1.8.0_66\bin\server\jvm.pdb C:\Program Files\Java\jre1.8.0_66\bin\java.exe N/A
File opened for modification C:\Program Files\Java\jre1.8.0_66\bin\jvm.pdb C:\Program Files\Java\jre1.8.0_66\bin\java.exe N/A
File opened for modification C:\Program Files\Java\jre1.8.0_66\bin\dll\jvm.pdb C:\Program Files\Java\jre1.8.0_66\bin\java.exe N/A
File opened for modification C:\Program Files\Java\jre1.8.0_66\bin\server\ntdll.pdb C:\Program Files\Java\jre1.8.0_66\bin\java.exe N/A
File opened for modification C:\Program Files\Java\jre1.8.0_66\bin\dll\ntdll.pdb C:\Program Files\Java\jre1.8.0_66\bin\java.exe N/A
File opened for modification C:\Program Files\Java\jre1.8.0_66\bin\symbols\dll\ntdll.pdb C:\Program Files\Java\jre1.8.0_66\bin\java.exe N/A
File opened for modification C:\Program Files\Java\jre1.8.0_66\bin\server\dll\jvm.pdb C:\Program Files\Java\jre1.8.0_66\bin\java.exe N/A
File opened for modification C:\Program Files\Java\jre1.8.0_66\bin\server\symbols\dll\jvm.pdb C:\Program Files\Java\jre1.8.0_66\bin\java.exe N/A
File opened for modification C:\Program Files\Java\jre1.8.0_66\bin\symbols\dll\jvm.pdb C:\Program Files\Java\jre1.8.0_66\bin\java.exe N/A
File opened for modification C:\Program Files\Java\jre1.8.0_66\bin\server\dll\ntdll.pdb C:\Program Files\Java\jre1.8.0_66\bin\java.exe N/A
File opened for modification C:\Program Files\Java\jre1.8.0_66\bin\server\symbols\dll\ntdll.pdb C:\Program Files\Java\jre1.8.0_66\bin\java.exe N/A
File opened for modification C:\Program Files\Java\jre1.8.0_66\bin\ntdll.pdb C:\Program Files\Java\jre1.8.0_66\bin\java.exe N/A

Enumerates physical storage devices

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:\Windows\system32\wscript.exe

wscript.exe C:\Users\Admin\AppData\Local\Temp\b8416d71e5a4bd1cc48552152bbbce450009ca04a6891823de3067af57c1559a.js

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

"C:\Program Files\Java\jre1.8.0_66\bin\javaw.exe" -jar "C:\Users\Admin\AppData\Roaming\qhzgrvso.txt"

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\qhzgrvso.txt"

C:\Windows\SYSTEM32\cmd.exe

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

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\qhzgrvso.txt"

C:\Windows\system32\schtasks.exe

schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\qhzgrvso.txt"

Network

Country Destination Domain Proto
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 10.226.21.2.in-addr.arpa udp
US 8.8.8.8:53 254.109.26.67.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 repo1.maven.org 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 8.8.8.8:53 github.com udp
US 140.82.113.4:443 github.com tcp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 209.192.232.199.in-addr.arpa udp
US 8.8.8.8:53 4.113.82.140.in-addr.arpa udp
US 8.8.8.8:53 254.20.238.8.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 objects.githubusercontent.com udp
US 185.199.111.133:443 objects.githubusercontent.com tcp
US 8.8.8.8:53 133.111.199.185.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 66.112.168.52.in-addr.arpa udp
US 8.8.8.8:53 9.57.101.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp

Files

C:\Users\Admin\AppData\Roaming\qhzgrvso.txt

MD5 c7fff6f9adc6a624b2dcb9651c3b3567
SHA1 6912bf0f6924e47e88eb976214b4c4cd22f8e863
SHA256 0b7805864d52d9023f35762740194c4bcb7a01c38e9db071cc7526dca68253fd
SHA512 979ff8489c59c4e076113daa51a545cc4ab2b969e5d9b4ad2982eebc6cf2199852b70aa2d721277211ca0eb5664ba364b6bd5a4092f62dea98a1afc8d04c3c61

memory/4740-4-0x0000000002A70000-0x0000000003A70000-memory.dmp

memory/4740-13-0x0000000002700000-0x0000000002701000-memory.dmp

memory/4740-19-0x0000000002A70000-0x0000000003A70000-memory.dmp

memory/4740-30-0x0000000002A70000-0x0000000003A70000-memory.dmp

memory/4740-31-0x0000000002700000-0x0000000002701000-memory.dmp

memory/4740-43-0x0000000002A70000-0x0000000003A70000-memory.dmp

memory/4740-45-0x0000000002700000-0x0000000002701000-memory.dmp

memory/4740-54-0x0000000002A70000-0x0000000003A70000-memory.dmp

memory/4740-57-0x0000000002A70000-0x0000000003A70000-memory.dmp

memory/4740-62-0x0000000002700000-0x0000000002701000-memory.dmp

memory/4740-66-0x0000000002700000-0x0000000002701000-memory.dmp

memory/4740-69-0x0000000002700000-0x0000000002701000-memory.dmp

memory/4740-70-0x0000000002700000-0x0000000002701000-memory.dmp

memory/4740-77-0x0000000002700000-0x0000000002701000-memory.dmp

memory/4740-83-0x0000000002700000-0x0000000002701000-memory.dmp

memory/4740-86-0x0000000002700000-0x0000000002701000-memory.dmp

memory/4740-101-0x0000000002A70000-0x0000000003A70000-memory.dmp

memory/4740-102-0x0000000002A70000-0x0000000003A70000-memory.dmp

memory/4740-103-0x0000000002A70000-0x0000000003A70000-memory.dmp

memory/4740-104-0x0000000002A70000-0x0000000003A70000-memory.dmp

memory/4740-105-0x0000000002700000-0x0000000002701000-memory.dmp

memory/4740-106-0x0000000002700000-0x0000000002701000-memory.dmp

memory/4740-110-0x0000000002A70000-0x0000000003A70000-memory.dmp

C:\Users\Admin\qhzgrvso.txt

MD5 c7fff6f9adc6a624b2dcb9651c3b3567
SHA1 6912bf0f6924e47e88eb976214b4c4cd22f8e863
SHA256 0b7805864d52d9023f35762740194c4bcb7a01c38e9db071cc7526dca68253fd
SHA512 979ff8489c59c4e076113daa51a545cc4ab2b969e5d9b4ad2982eebc6cf2199852b70aa2d721277211ca0eb5664ba364b6bd5a4092f62dea98a1afc8d04c3c61

memory/4740-116-0x0000000002700000-0x0000000002701000-memory.dmp

memory/4420-118-0x00000000029A0000-0x00000000039A0000-memory.dmp

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

MD5 9bc44de36f9ae627b66c289d6a566692
SHA1 fa3835561562f9ca26027775e3de375693787084
SHA256 7ad415e53822b51b404524a2600f3707828c904dc41fa1be81dd0282655f7d33
SHA512 21ca454e32fe34400215b85ef6222474ad5183410e4578130c42373c1918784fd3290a3f954ce711b1277f7aceb9928d8c001b32230c128b58803c9b754e98e8

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/4420-130-0x0000000000A60000-0x0000000000A61000-memory.dmp

memory/4420-131-0x0000000000A60000-0x0000000000A61000-memory.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\qhzgrvso.txt

MD5 c7fff6f9adc6a624b2dcb9651c3b3567
SHA1 6912bf0f6924e47e88eb976214b4c4cd22f8e863
SHA256 0b7805864d52d9023f35762740194c4bcb7a01c38e9db071cc7526dca68253fd
SHA512 979ff8489c59c4e076113daa51a545cc4ab2b969e5d9b4ad2982eebc6cf2199852b70aa2d721277211ca0eb5664ba364b6bd5a4092f62dea98a1afc8d04c3c61

C:\Users\Admin\AppData\Roaming\qhzgrvso.txt

MD5 c7fff6f9adc6a624b2dcb9651c3b3567
SHA1 6912bf0f6924e47e88eb976214b4c4cd22f8e863
SHA256 0b7805864d52d9023f35762740194c4bcb7a01c38e9db071cc7526dca68253fd
SHA512 979ff8489c59c4e076113daa51a545cc4ab2b969e5d9b4ad2982eebc6cf2199852b70aa2d721277211ca0eb5664ba364b6bd5a4092f62dea98a1afc8d04c3c61

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

MD5 e1aa38a1e78a76a6de73efae136cdb3a
SHA1 c463da71871f780b2e2e5dba115d43953b537daf
SHA256 2ddda8af6faef8bde46acf43ec546603180bcf8dcb2e5591fff8ac9cd30b5609
SHA512 fee16fe9364926ec337e52f551fd62ed81984808a847de2fd68ff29b6c5da0dcc04ef6d8977f0fe675662a7d2ea1065cdcdd2a5259446226a7c7c5516bd7d60d

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

MD5 b33387e15ab150a7bf560abdc73c3bec
SHA1 66b8075784131f578ef893fd7674273f709b9a4c
SHA256 2eae3dea1c3dde6104c49f9601074b6038ff6abcf3be23f4b56f6720a4f6a491
SHA512 25cfb0d6ce35d0bcb18527d3aa12c63ecb2d9c1b8b78805d1306e516c13480b79bb0d74730aa93bd1752f9ac2da9fdd51781c48844cea2fd52a06c62852c8279

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

MD5 2f4a99c2758e72ee2b59a73586a2322f
SHA1 af38e7c4d0fc73c23ecd785443705bfdee5b90bf
SHA256 24d81621f82ac29fcdd9a74116031f5907a2343158e616f4573bbfa2434ae0d5
SHA512 b860459a0d3bf7ccb600a03aa1d2ac0358619ee89b2b96ed723541e182b6fdab53aefef7992acb4e03fca67aa47cbe3907b1e6060a60b57ed96c4e00c35c7494

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

MD5 acfb5b5fd9ee10bf69497792fd469f85
SHA1 0e0845217c4907822403912ad6828d8e0b256208
SHA256 b308faebfe4ed409de8410e0a632d164b2126b035f6eacff968d3908cafb4d9e
SHA512 e52575f58a195ceb3bd16b9740eadf5bc5b1d4d63c0734e8e5fd1d1776aa2d068d2e4c7173b83803f95f72c0a6759ae1c9b65773c734250d4cfcdf47a19f82aa

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

MD5 b716ebf6e7b2f9de5ecd4be9db3d3de5
SHA1 621832410b425ba1aa86f2231ebd3ddd7e28a194
SHA256 2f3dbbeb5062af9bced563c3e55482b0acd739495b9b5668d26899ec8eec0952
SHA512 47db02a4fa35539a5752c2fbd65a0f7adc4ee8410cf16786249734655c4ca9c3e39928e14f57030efc537183bd7e69ba53e69cf5974013ede17430575d470797

memory/1672-152-0x0000000002C10000-0x0000000003C10000-memory.dmp

memory/1672-161-0x0000000000F80000-0x0000000000F81000-memory.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-919254492-3979293997-764407192-1000\83aa4cc77f591dfc2374580bbd95f6ba_eafea0cb-98e7-4e88-b719-0a1e3b6ee7ae

MD5 c8366ae350e7019aefc9d1e6e6a498c6
SHA1 5731d8a3e6568a5f2dfbbc87e3db9637df280b61
SHA256 11e6aca8e682c046c83b721eeb5c72c5ef03cb5936c60df6f4993511ddc61238
SHA512 33c980d5a638bfc791de291ebf4b6d263b384247ab27f261a54025108f2f85374b579a026e545f81395736dd40fa4696f2163ca17640dd47f1c42bc9971b18cd

memory/1672-167-0x0000000002C10000-0x0000000003C10000-memory.dmp

memory/1672-170-0x0000000002C10000-0x0000000003C10000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\jna-63116079\jna829768381955866915.dll

MD5 e02979ecd43bcc9061eb2b494ab5af50
SHA1 3122ac0e751660f646c73b10c4f79685aa65c545
SHA256 a66959bec2ef5af730198db9f3b3f7cab0d4ae70ce01bec02bf1d738e6d1ee7a
SHA512 1e6f7dcb6a557c9b896412a48dd017c16f7a52fa2b9ab513593c9ecd118e86083979821ca7a3e2f098ee349200c823c759cec6599740dd391cb5f354dc29b372

memory/1672-178-0x0000000002C10000-0x0000000003C10000-memory.dmp

memory/1672-179-0x0000000002C10000-0x0000000003C10000-memory.dmp