Malware Analysis Report

2025-01-18 16:46

Sample ID 220313-lh7fjafdbl
Target f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df
SHA256 f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df
Tags
isrstealer collection spyware 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

f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df

Threat Level: Known bad

The file f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df was found to be: Known bad.

Malicious Activity Summary

isrstealer collection spyware stealer trojan upx

ISR Stealer

ISR Stealer Payload

NirSoft WebBrowserPassView

NirSoft MailPassView

Nirsoft

UPX packed file

Executes dropped EXE

Reads data files stored by FTP clients

Loads dropped DLL

Reads user/profile data of web browsers

Accesses Microsoft Outlook accounts

Suspicious use of SetThreadContext

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-03-13 09:33

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-03-13 09:33

Reported

2022-03-13 09:35

Platform

win7-20220310-en

Max time kernel

4294183s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.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

NirSoft MailPassView

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

NirSoft WebBrowserPassView

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
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

Reads data files stored by FTP clients

spyware stealer

Reads user/profile data of web browsers

spyware stealer

Accesses Microsoft Outlook accounts

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-2932610838-281738825-1127631353-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts C:\Users\Admin\AppData\Local\Temp\cvtres.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe N/A

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 536 wrote to memory of 1660 N/A C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 536 wrote to memory of 1660 N/A C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 536 wrote to memory of 1660 N/A C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 536 wrote to memory of 1660 N/A C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 536 wrote to memory of 1660 N/A C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 536 wrote to memory of 1660 N/A C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 536 wrote to memory of 1660 N/A C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 536 wrote to memory of 1660 N/A C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1660 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1660 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1660 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1660 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1660 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1660 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1660 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1660 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1660 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1660 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1660 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1660 wrote to memory of 1904 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1896 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1896 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1896 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1896 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1896 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1896 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1712 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1712 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1712 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1712 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1712 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1712 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1576 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1576 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1576 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1576 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1576 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe
PID 1904 wrote to memory of 1576 N/A C:\Users\Admin\AppData\Local\Temp\cvtres.exe C:\Users\Admin\AppData\Local\Temp\cvtres.exe

Processes

C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe

"C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe"

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

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

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

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

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

"C:\Users\Admin\AppData\Local\Temp\cvtres.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp

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

"C:\Users\Admin\AppData\Local\Temp\cvtres.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp

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

"C:\Users\Admin\AppData\Local\Temp\cvtres.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.rampymc.binhoster.com udp

Files

memory/536-54-0x0000000076141000-0x0000000076143000-memory.dmp

memory/536-55-0x0000000074B90000-0x000000007513B000-memory.dmp

memory/536-56-0x0000000000500000-0x0000000000501000-memory.dmp

memory/536-57-0x0000000074B90000-0x000000007513B000-memory.dmp

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

MD5 ed797d8dc2c92401985d162e42ffa450
SHA1 0f02fc517c7facc4baefde4fe9467fb6488ebabe
SHA256 b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e
SHA512 e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

memory/1660-59-0x0000000000400000-0x0000000000470000-memory.dmp

memory/1660-61-0x0000000000400000-0x0000000000470000-memory.dmp

memory/1660-63-0x0000000000400000-0x0000000000470000-memory.dmp

memory/1660-65-0x0000000000400000-0x0000000000470000-memory.dmp

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

MD5 ed797d8dc2c92401985d162e42ffa450
SHA1 0f02fc517c7facc4baefde4fe9467fb6488ebabe
SHA256 b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e
SHA512 e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

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

MD5 ed797d8dc2c92401985d162e42ffa450
SHA1 0f02fc517c7facc4baefde4fe9467fb6488ebabe
SHA256 b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e
SHA512 e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

memory/1904-72-0x0000000000400000-0x000000000045F000-memory.dmp

memory/1904-74-0x0000000000400000-0x000000000045F000-memory.dmp

memory/1904-76-0x0000000000400000-0x000000000045F000-memory.dmp

memory/1904-78-0x0000000000400000-0x000000000045F000-memory.dmp

memory/1904-80-0x0000000000400000-0x000000000045F000-memory.dmp

memory/1904-82-0x0000000000400000-0x000000000045F000-memory.dmp

memory/1904-84-0x0000000000400000-0x000000000045F000-memory.dmp

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

MD5 ed797d8dc2c92401985d162e42ffa450
SHA1 0f02fc517c7facc4baefde4fe9467fb6488ebabe
SHA256 b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e
SHA512 e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

memory/1904-86-0x0000000000400000-0x000000000045F000-memory.dmp

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

MD5 ed797d8dc2c92401985d162e42ffa450
SHA1 0f02fc517c7facc4baefde4fe9467fb6488ebabe
SHA256 b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e
SHA512 e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

memory/1904-88-0x0000000000400000-0x000000000045F000-memory.dmp

memory/1904-89-0x0000000000400000-0x000000000045F000-memory.dmp

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

MD5 ed797d8dc2c92401985d162e42ffa450
SHA1 0f02fc517c7facc4baefde4fe9467fb6488ebabe
SHA256 b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e
SHA512 e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

memory/1896-91-0x0000000000400000-0x0000000000454000-memory.dmp

memory/1896-93-0x0000000000400000-0x0000000000454000-memory.dmp

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

MD5 ed797d8dc2c92401985d162e42ffa450
SHA1 0f02fc517c7facc4baefde4fe9467fb6488ebabe
SHA256 b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e
SHA512 e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

memory/1712-97-0x0000000000400000-0x0000000000426000-memory.dmp

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

MD5 ed797d8dc2c92401985d162e42ffa450
SHA1 0f02fc517c7facc4baefde4fe9467fb6488ebabe
SHA256 b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e
SHA512 e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

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

MD5 ed797d8dc2c92401985d162e42ffa450
SHA1 0f02fc517c7facc4baefde4fe9467fb6488ebabe
SHA256 b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e
SHA512 e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

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

MD5 ed797d8dc2c92401985d162e42ffa450
SHA1 0f02fc517c7facc4baefde4fe9467fb6488ebabe
SHA256 b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e
SHA512 e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

memory/1712-100-0x0000000000400000-0x0000000000426000-memory.dmp

memory/1576-104-0x0000000000400000-0x000000000041F000-memory.dmp

memory/1576-106-0x0000000000400000-0x000000000041F000-memory.dmp

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

MD5 ed797d8dc2c92401985d162e42ffa450
SHA1 0f02fc517c7facc4baefde4fe9467fb6488ebabe
SHA256 b746362010a101cb5931bc066f0f4d3fc740c02a68c1f37fc3c8e6c87fd7cb1e
SHA512 e831a6ff987f3ef29982da16afad06938b68eddd43c234ba88d1c96a1b5547f2284baf35cbb3a5bfd75e7f0445d14daa014e0ba00b4db72c67f83f0a314c80c2

memory/1712-113-0x0000000000400000-0x0000000000426000-memory.dmp

memory/1896-112-0x0000000000400000-0x0000000000454000-memory.dmp

memory/1576-114-0x0000000000400000-0x000000000041F000-memory.dmp

memory/1712-116-0x0000000000400000-0x0000000000426000-memory.dmp

memory/1576-115-0x0000000000400000-0x000000000041F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-03-13 09:33

Reported

2022-03-13 09:35

Platform

win10v2004-en-20220113

Max time kernel

138s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe

"C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe"

C:\Windows\SysWOW64\fondue.exe

"C:\Windows\system32\fondue.exe" /enable-feature:NetFx3 /caller-name:mscoreei.dll

C:\Windows\system32\FonDUE.EXE

"C:\Windows\sysnative\FonDUE.EXE" /enable-feature:NetFx3 /caller-name:mscoreei.dll

Network

Country Destination Domain Proto
US 72.21.81.240:80 tcp
US 72.21.81.240:80 tcp

Files

N/A