isrstealer | 6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d

General

Target

6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
Size

260KB
MD5

bc6c65d770ebb1a13181a32f92e59d73
SHA1

9ac0f5de1739064ca59e549a20b6c90a7b3278b6
SHA256

6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d
SHA512

c8e151913540f2b95a7b6ca30aae700d6166fcbbdacc40c85ee1b99d72a5fa4431b33b23947ec435fae0046d795e6dc4e89cb3969eb3b17f60b253ff1d3c457a

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

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4684-140-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 1 IoCs

resource	yara_rule
behavioral2/memory/4684-140-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1996-132-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1996-134-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1996-135-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4684-137-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4684-139-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4684-140-0x0000000000400000-0x000000000041F000-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-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1676 set thread context of 1996	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	79
PID 1676 set thread context of 4684	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	84

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1676 wrote to memory of 1996	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	79
PID 1676 wrote to memory of 1996	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	79
PID 1676 wrote to memory of 1996	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	79
PID 1676 wrote to memory of 1996	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	79
PID 1676 wrote to memory of 1996	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	79
PID 1676 wrote to memory of 1996	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	79
PID 1676 wrote to memory of 1996	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	79
PID 1676 wrote to memory of 1996	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	79
PID 1676 wrote to memory of 4684	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	84
PID 1676 wrote to memory of 4684	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	84
PID 1676 wrote to memory of 4684	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	84
PID 1676 wrote to memory of 4684	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	84
PID 1676 wrote to memory of 4684	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	84
PID 1676 wrote to memory of 4684	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	84
PID 1676 wrote to memory of 4684	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	84
PID 1676 wrote to memory of 4684	1676	6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe	84

C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
"C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1676
- C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\g7slJzAP30.ini"
  2⤵
  PID:1996
- C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\FW0axvQaI1.ini"
  2⤵
  - Accesses Microsoft Outlook accounts
  PID:4684

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/1996-132-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1996-134-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1996-135-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4684-137-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4684-139-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4684-140-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

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