isrstealer | 4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc

General

Target

4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
Size

1.1MB
MD5

0978c0afb277d9b7d385877d337ce00d
SHA1

4bc4c1cb8ca4c7be485f86cc9f5de65bf92a3af2
SHA256

4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc
SHA512

e0ce1d5e8ed831bb8ec767b3db7865afa90bf2f7b3c1c13a09ccf95b8d7d969a9a53a26fe65ce0a37cf55cb11dc90acfe01962d9ef423fcb2b13f8da925998b7
SSDEEP

24576:8RmJkqoQrilOIQ+yMxGaCyM0SQOb/yIwhCtS:tJXoQryTiMxGaCLOOb/yhQS

Score

10^/10

isrstealer collection spyware stealer trojan upx

Malware Config

Signatures

ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
trojan stealer isrstealer

ISR Stealer payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1772-58-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1772-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1772-61-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1772-71-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1772-76-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1772-85-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral1/memory/1972-82-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1972-83-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1972-84-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1972-82-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1972-83-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1972-84-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 10 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral1/memory/2024-65-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2024-69-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2024-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2024-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2024-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1972-77-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1972-81-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1972-82-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1972-83-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1972-84-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

Processes:

4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe

description	pid	process	target process
PID 1744 set thread context of 1772	1744	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 set thread context of 2024	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 set thread context of 1972	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of FindShellTrayWindow 3 IoCs

Processes:

4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe

pid	process
1744	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
1744	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
1744	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe

Suspicious use of SendNotifyMessage 3 IoCs

Processes:

4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe

pid	process
1744	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
1744	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
1744	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe

pid process

1772 4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe

pid	process
1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe

C:\Users\Admin\AppData\Local\Temp\4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
"C:\Users\Admin\AppData\Local\Temp\4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1744

C:\Users\Admin\AppData\Local\Temp\4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
"C:\Users\Admin\AppData\Local\Temp\4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1772

C:\Users\Admin\AppData\Local\Temp\4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\rOXMi7ljoX.ini"
3⤵
PID:2024

C:\Users\Admin\AppData\Local\Temp\4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\d5yXQXYMYU.ini"
3⤵
- Accesses Microsoft Outlook accounts
PID:1972

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\rOXMi7ljoX.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1744-54-0x0000000076DC1000-0x0000000076DC3000-memory.dmp

Filesize
8KB

Download
memory/1772-71-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1772-55-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1772-56-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1772-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1772-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1772-61-0x0000000000401180-mapping.dmp

Download
memory/1772-85-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1772-76-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1972-78-0x000000000041C410-mapping.dmp

Download
memory/1972-77-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1972-81-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1972-82-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1972-83-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1972-84-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2024-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2024-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2024-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2024-69-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2024-66-0x00000000004512E0-mapping.dmp

Download
memory/2024-65-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

description	pid	process	target process
PID 1744 wrote to memory of 1772	1744	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1744 wrote to memory of 1772	1744	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1744 wrote to memory of 1772	1744	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1744 wrote to memory of 1772	1744	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1744 wrote to memory of 1772	1744	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1744 wrote to memory of 1772	1744	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1744 wrote to memory of 1772	1744	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 2024	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 2024	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 2024	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 2024	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 2024	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 2024	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 2024	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 2024	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 2024	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 1972	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 1972	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 1972	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 1972	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 1972	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 1972	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 1972	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 1972	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe
PID 1772 wrote to memory of 1972	1772	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe	4fa0120232fbaed41bc4039a63818e0cd05cbf386e3198da8551c7ea390ce3dc.exe

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads