isrstealer | 41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73

General

Target

41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
Size

260KB
MD5

b56d082f9ef93cac84d1dbf8cb0636b3
SHA1

7b4444d5cc44e3a8cf57df60edd50d1bb0059b76
SHA256

41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73
SHA512

e44986bacda19ff41d810790235931a6c28957ea255071d19237866117148e46d81307087c49042c5b5ba78527220c589f848f82b4346090b6b7d8aa752d3d66

Score

10^/10

isrstealer collection spyware stealer suricata trojan upx

Malware Config

Signatures

ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
trojan stealer isrstealer
suricata: ET MALWARE ISRStealer Checkin
suricata: ET MALWARE ISRStealer Checkin
suricata

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3696-140-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 1 IoCs

resource	yara_rule
behavioral2/memory/3696-140-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3324-132-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3324-134-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3324-135-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3696-137-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3696-139-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3696-140-0x0000000000400000-0x000000000041F000-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

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3484 set thread context of 3324	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	53
PID 3484 set thread context of 3696	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	59

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3484 wrote to memory of 3324	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	53
PID 3484 wrote to memory of 3324	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	53
PID 3484 wrote to memory of 3324	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	53
PID 3484 wrote to memory of 3324	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	53
PID 3484 wrote to memory of 3324	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	53
PID 3484 wrote to memory of 3324	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	53
PID 3484 wrote to memory of 3324	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	53
PID 3484 wrote to memory of 3324	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	53
PID 3484 wrote to memory of 3696	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	59
PID 3484 wrote to memory of 3696	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	59
PID 3484 wrote to memory of 3696	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	59
PID 3484 wrote to memory of 3696	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	59
PID 3484 wrote to memory of 3696	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	59
PID 3484 wrote to memory of 3696	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	59
PID 3484 wrote to memory of 3696	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	59
PID 3484 wrote to memory of 3696	3484	41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe	59

C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
"C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3484
- C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\KaEWdA78FJ.ini"
  2⤵
  PID:3324
- C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\akXMQ1bizg.ini"
  2⤵
  - Accesses Microsoft Outlook accounts
  PID:3696

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3324-132-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3324-134-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3324-135-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3696-137-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3696-139-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3696-140-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

Sharing