isrstealer | 9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca

General

Target
9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe
Size 260KB
Sample221011-e343ksegcl
SHA256 9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca
MD5 6c9ffd9ae46f9e10d3aa64803cfbb790
SHA1 5df512d6d7bb057db4377291d85dddc3de2f4b16
SHA512 15582f92b7f874de29fc390b4041fe7b05e7f5a7c08d7bb6bc15781f9880ff42ca7c2739d17cc3cb17d68bb349e512daf7b5f76e7ec68140924618c940e0eb52
SSDEEP 6144:PYb//1PxwVdIKCC0ef//uXltKc+LVsz9b8R4jvLXou:lVdFeCXuLKcCVsz6SDLXo
MD5 SHA1 SHA512 SSDEEP

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 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/456-146-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/456-147-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/456-146-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/456-147-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5028-135-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5028-137-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5028-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5028-139-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5028-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/456-143-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/456-145-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/456-146-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/456-147-0x0000000000400000-0x000000000041F000-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-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4724 set thread context of 5028	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	81
PID 4724 set thread context of 456	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	82

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4724 wrote to memory of 5028	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	81
PID 4724 wrote to memory of 5028	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	81
PID 4724 wrote to memory of 5028	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	81
PID 4724 wrote to memory of 5028	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	81
PID 4724 wrote to memory of 5028	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	81
PID 4724 wrote to memory of 5028	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	81
PID 4724 wrote to memory of 5028	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	81
PID 4724 wrote to memory of 5028	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	81
PID 4724 wrote to memory of 456	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	82
PID 4724 wrote to memory of 456	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	82
PID 4724 wrote to memory of 456	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	82
PID 4724 wrote to memory of 456	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	82
PID 4724 wrote to memory of 456	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	82
PID 4724 wrote to memory of 456	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	82
PID 4724 wrote to memory of 456	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	82
PID 4724 wrote to memory of 456	4724	9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe	82

C:\Users\Admin\AppData\Local\Temp\9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe
"C:\Users\Admin\AppData\Local\Temp\9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4724
- C:\Users\Admin\AppData\Local\Temp\9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\qkav2CMMer.ini"
  2⤵
  PID:5028
- C:\Users\Admin\AppData\Local\Temp\9c328e11662d561e2ff77a7d6888122f93254f79b2541e7d47b5266bc28712ca.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\gSPaAWuO7o.ini"
  2⤵
  - Accesses Microsoft Outlook accounts
  PID:456

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

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Downloads

qkav2CMMer.ini

Path C:\Users\Admin\AppData\Local\Temp\qkav2CMMer.ini
Size 5B
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3
MD5 SHA1 SHA512

Submit Download

memory/456-143-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/456-145-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/456-146-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/456-147-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/5028-135-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/5028-137-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/5028-138-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/5028-139-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/5028-140-0x0000000000400000-0x0000000000453000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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