Malware Analysis Report

2024-10-19 10:27

Sample ID 240308-lkcnyabg47
Target baeaafc9f3d5c944ee7e39d2103e3c87
SHA256 33e595babcf67d43afe50976ab1a20f58c8d737b723fbea915943e89d400e6cb
Tags
isrstealer persistence spyware stealer trojan upx
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

33e595babcf67d43afe50976ab1a20f58c8d737b723fbea915943e89d400e6cb

Threat Level: Known bad

The file baeaafc9f3d5c944ee7e39d2103e3c87 was found to be: Known bad.

Malicious Activity Summary

isrstealer persistence spyware stealer trojan upx

ISR Stealer

ISR Stealer payload

Reads user/profile data of web browsers

UPX packed file

Executes dropped EXE

Loads dropped DLL

Adds Run key to start application

Suspicious use of SetThreadContext

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-08 09:35

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-08 09:35

Reported

2024-03-08 09:37

Platform

win7-20240221-en

Max time kernel

118s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe"

Signatures

ISR Stealer

trojan stealer isrstealer

ISR Stealer payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe N/A

Reads user/profile data of web browsers

spyware stealer

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\Fire fox Update = "C:\\Users\\Admin\\AppData\\Local\\Temp\\baeaafc9f3d5c944ee7e39d2103e3c87.exe" C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2240 set thread context of 2308 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 2308 set thread context of 2584 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2240 wrote to memory of 2308 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 2240 wrote to memory of 2308 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 2240 wrote to memory of 2308 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 2240 wrote to memory of 2308 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 2240 wrote to memory of 2308 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 2240 wrote to memory of 2308 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 2240 wrote to memory of 2308 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 2240 wrote to memory of 2308 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 2308 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 2308 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 2308 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 2308 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 2308 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 2308 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 2308 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 2308 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 2308 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe

Processes

C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe

"C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe"

C:\Users\Admin\AppData\Local\Temp\twitter.exe

C:\Users\Admin\AppData\Local\Temp\twitter.exe

C:\Users\Admin\AppData\Local\Temp\twitter.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\NvkJBmaosP.ini"

Network

Country Destination Domain Proto
US 8.8.8.8:53 logs.warezthegfx.info udp

Files

memory/2240-1-0x00000000008D0000-0x0000000000910000-memory.dmp

memory/2240-0-0x0000000074090000-0x000000007463B000-memory.dmp

memory/2240-2-0x0000000074090000-0x000000007463B000-memory.dmp

\Users\Admin\AppData\Local\Temp\twitter.exe

MD5 ed797d8dc2c92401985d162e42ffa450
SHA1 0f02fc517c7facc4baefde4fe9467fb6488ebabe
SHA256 b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e
SHA512 e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

memory/2308-7-0x0000000000400000-0x0000000000435000-memory.dmp

memory/2308-9-0x0000000000400000-0x0000000000435000-memory.dmp

memory/2308-15-0x0000000000400000-0x0000000000435000-memory.dmp

memory/2308-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2308-11-0x0000000000400000-0x0000000000435000-memory.dmp

memory/2240-20-0x0000000074090000-0x000000007463B000-memory.dmp

memory/2584-24-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2584-28-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2584-27-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2584-29-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2584-30-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2584-32-0x0000000000400000-0x0000000000453000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\NvkJBmaosP.ini

MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

memory/2308-35-0x0000000000400000-0x0000000000435000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-08 09:35

Reported

2024-03-08 09:37

Platform

win10v2004-20240226-en

Max time kernel

143s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe"

Signatures

ISR Stealer

trojan stealer isrstealer

ISR Stealer payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe N/A

Reads user/profile data of web browsers

spyware stealer

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Fire fox Update = "C:\\Users\\Admin\\AppData\\Local\\Temp\\baeaafc9f3d5c944ee7e39d2103e3c87.exe" C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 5084 set thread context of 4624 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 4624 set thread context of 3244 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 5084 wrote to memory of 4624 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 5084 wrote to memory of 4624 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 5084 wrote to memory of 4624 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 5084 wrote to memory of 4624 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 5084 wrote to memory of 4624 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 5084 wrote to memory of 4624 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 5084 wrote to memory of 4624 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 5084 wrote to memory of 4624 N/A C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 4624 wrote to memory of 3244 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 4624 wrote to memory of 3244 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 4624 wrote to memory of 3244 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 4624 wrote to memory of 3244 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 4624 wrote to memory of 3244 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 4624 wrote to memory of 3244 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 4624 wrote to memory of 3244 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe
PID 4624 wrote to memory of 3244 N/A C:\Users\Admin\AppData\Local\Temp\twitter.exe C:\Users\Admin\AppData\Local\Temp\twitter.exe

Processes

C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe

"C:\Users\Admin\AppData\Local\Temp\baeaafc9f3d5c944ee7e39d2103e3c87.exe"

C:\Users\Admin\AppData\Local\Temp\twitter.exe

C:\Users\Admin\AppData\Local\Temp\twitter.exe

C:\Users\Admin\AppData\Local\Temp\twitter.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\8dbjxRbnvH.ini"

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1396 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 20.160.190.20.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 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 175.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
GB 172.217.169.74:443 tcp
US 8.8.8.8:53 logs.warezthegfx.info udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 13.107.253.64:443 tcp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.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
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 88.16.208.104.in-addr.arpa udp

Files

memory/5084-0-0x00000000749C0000-0x0000000074F71000-memory.dmp

memory/5084-1-0x00000000749C0000-0x0000000074F71000-memory.dmp

memory/5084-2-0x0000000001410000-0x0000000001420000-memory.dmp

memory/4624-5-0x0000000000400000-0x0000000000435000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\twitter.exe

MD5 e118330b4629b12368d91b9df6488be0
SHA1 ce90218c7e3b90df2a3409ec253048bb6472c2fd
SHA256 3a0f2936b8c45e8ba3458d69d7859a63844469e698652e15fb56639d32f40cc9
SHA512 ac91c04cb20223dbaaf594440cb778dff36e857921be427c8528ba4c6cdb3e8bf8e71e1ae8af7bde9c04ff5b97b379231625bc1a2b66aba2f98cd340cd8a94b0

memory/4624-9-0x0000000000400000-0x0000000000435000-memory.dmp

memory/3244-12-0x0000000000400000-0x0000000000453000-memory.dmp

memory/3244-16-0x0000000000400000-0x0000000000453000-memory.dmp

memory/3244-17-0x0000000000400000-0x0000000000453000-memory.dmp

memory/5084-19-0x00000000749C0000-0x0000000074F71000-memory.dmp

memory/3244-18-0x0000000000400000-0x0000000000453000-memory.dmp

memory/3244-21-0x0000000000400000-0x0000000000453000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\8dbjxRbnvH.ini

MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

memory/4624-24-0x0000000000400000-0x0000000000435000-memory.dmp