Malware Analysis Report

2025-01-18 16:49

Sample ID 221001-3tjbhsdfhn
Target 29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45
SHA256 29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45
Tags
isrstealer collection stealer trojan upx
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

29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45

Threat Level: Known bad

The file 29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45 was found to be: Known bad.

Malicious Activity Summary

isrstealer collection stealer trojan upx

ISR Stealer

ISR Stealer payload

NirSoft MailPassView

Nirsoft

UPX packed file

Uses the VBS compiler for execution

Accesses Microsoft Outlook accounts

Suspicious use of SetThreadContext

Suspicious use of SetWindowsHookEx

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-10-01 23:48

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-10-01 23:48

Reported

2022-10-02 02:16

Platform

win7-20220901-en

Max time kernel

51s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.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
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

NirSoft MailPassView

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

Nirsoft

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

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
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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

Uses the VBS compiler for execution

Accesses Microsoft Outlook accounts

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 992 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 992 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 992 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 992 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 992 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 992 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 992 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 992 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1236 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1236 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1236 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1236 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1236 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1236 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1236 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1236 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1236 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1160 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1160 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1160 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1160 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1160 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1160 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1160 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1160 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 1980 wrote to memory of 1160 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe

Processes

C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe

"C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe"

C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe

"C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"

C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\GM3VElFw6q.ini"

C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\67kjGeItf3.ini"

Network

Country Destination Domain Proto
US 8.8.8.8:53 copier.comuf.com udp
US 153.92.0.100:80 copier.comuf.com tcp
US 8.8.8.8:53 www.000webhost.com udp
US 104.19.185.120:443 www.000webhost.com tcp

Files

memory/992-54-0x0000000076561000-0x0000000076563000-memory.dmp

memory/992-55-0x0000000074AA0000-0x000000007504B000-memory.dmp

memory/1980-56-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1980-57-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1980-59-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1980-61-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1980-62-0x0000000000401180-mapping.dmp

memory/992-67-0x0000000074AA0000-0x000000007504B000-memory.dmp

memory/1236-66-0x0000000000400000-0x0000000000453000-memory.dmp

memory/1236-68-0x00000000004512E0-mapping.dmp

memory/1236-71-0x0000000000400000-0x0000000000453000-memory.dmp

memory/1236-72-0x0000000000400000-0x0000000000453000-memory.dmp

memory/1236-74-0x0000000000400000-0x0000000000453000-memory.dmp

memory/1980-73-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1236-75-0x0000000000400000-0x0000000000453000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\GM3VElFw6q.ini

MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

memory/1160-79-0x000000000041C410-mapping.dmp

memory/1160-78-0x0000000000400000-0x000000000041F000-memory.dmp

memory/1160-82-0x0000000000400000-0x000000000041F000-memory.dmp

memory/1160-83-0x0000000000400000-0x000000000041F000-memory.dmp

memory/1160-84-0x0000000000400000-0x000000000041F000-memory.dmp

memory/1980-85-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1980-86-0x0000000000400000-0x0000000000442000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-01 23:48

Reported

2022-10-02 02:17

Platform

win10v2004-20220812-en

Max time kernel

152s

Max time network

168s

Command Line

"C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.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
N/A N/A N/A N/A

NirSoft MailPassView

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

Nirsoft

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

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
N/A N/A N/A N/A
N/A N/A N/A N/A

Uses the VBS compiler for execution

Accesses Microsoft Outlook accounts

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3572 wrote to memory of 3160 N/A C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3572 wrote to memory of 3160 N/A C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3572 wrote to memory of 3160 N/A C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3572 wrote to memory of 3160 N/A C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3572 wrote to memory of 3160 N/A C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3572 wrote to memory of 3160 N/A C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3572 wrote to memory of 3160 N/A C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3160 wrote to memory of 32 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3160 wrote to memory of 32 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3160 wrote to memory of 32 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3160 wrote to memory of 32 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3160 wrote to memory of 32 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3160 wrote to memory of 32 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3160 wrote to memory of 32 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3160 wrote to memory of 32 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3160 wrote to memory of 3456 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3160 wrote to memory of 3456 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3160 wrote to memory of 3456 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3160 wrote to memory of 3456 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3160 wrote to memory of 3456 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3160 wrote to memory of 3456 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3160 wrote to memory of 3456 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
PID 3160 wrote to memory of 3456 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe

Processes

C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe

"C:\Users\Admin\AppData\Local\Temp\29d024a8b7e02bddc35ff727883a6039dc15cb9a003f2aa09b843a1490db5c45.exe"

C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe

"C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"

C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe

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

C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\Ri84oN3r23.ini"

Network

Country Destination Domain Proto
US 93.184.220.29:80 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 8.8.8.8:53 copier.comuf.com udp
US 153.92.0.100:80 copier.comuf.com tcp
US 8.8.8.8:53 www.000webhost.com udp
US 104.19.185.120:443 www.000webhost.com tcp
US 93.184.221.240:80 tcp
NL 104.80.225.205:443 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 93.184.220.29:80 tcp
US 8.8.8.8:53 crl.usertrust.com udp
US 104.18.32.68:80 crl.usertrust.com tcp
US 8.8.8.8:53 151.122.125.40.in-addr.arpa udp
US 104.18.32.68:80 crl.usertrust.com tcp
US 172.64.155.188:80 crl.usertrust.com tcp
US 104.19.185.120:443 www.000webhost.com tcp
US 8.8.8.8:53 14.110.152.52.in-addr.arpa udp
US 8.8.8.8:53 151.122.125.40.in-addr.arpa udp
US 20.189.173.2:443 tcp

Files

memory/3572-132-0x00000000752B0000-0x0000000075861000-memory.dmp

memory/3160-133-0x0000000000000000-mapping.dmp

memory/3160-134-0x0000000000400000-0x0000000000442000-memory.dmp

memory/3572-137-0x00000000752B0000-0x0000000075861000-memory.dmp

memory/32-139-0x0000000000000000-mapping.dmp

memory/32-140-0x0000000000400000-0x0000000000453000-memory.dmp

memory/32-142-0x0000000000400000-0x0000000000453000-memory.dmp

memory/32-143-0x0000000000400000-0x0000000000453000-memory.dmp

memory/32-145-0x0000000000400000-0x0000000000453000-memory.dmp

memory/3160-144-0x0000000000400000-0x0000000000442000-memory.dmp

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

MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

memory/3160-147-0x0000000000400000-0x0000000000442000-memory.dmp

memory/3456-148-0x0000000000000000-mapping.dmp

memory/3456-149-0x0000000000400000-0x000000000041F000-memory.dmp

memory/3456-151-0x0000000000400000-0x000000000041F000-memory.dmp

memory/3456-152-0x0000000000400000-0x000000000041F000-memory.dmp

memory/3456-153-0x0000000000400000-0x000000000041F000-memory.dmp

memory/3160-154-0x0000000000400000-0x0000000000442000-memory.dmp