isrstealer | 36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083

General

Target

36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe
Size

260KB
MD5

63ed45e84f001fda39530acee1f1d3ab
SHA1

4e567048c90188840aa6caf76c0cd08f2e347df9
SHA256

36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083
SHA512

dbc51a704410f93192fb48712e1df1b2ab6d97ea1419fd9377d0f3a8fa92cefd2a0ebf83570a0c3f7e1ece6ba06d1741e4dad13281025e1c58ef2c9986ebfdd3
SSDEEP

6144:4Yb//1PxwvdIKCC0ef//uXltKc+LVsz9b8R4jvLXou:YvdFeCXuLKcCVsz6SDLXo

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/4228-146-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4228-147-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/4228-146-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4228-147-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4280-135-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4280-137-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4280-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4280-139-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4280-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4228-143-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4228-145-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4228-146-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4228-147-0x0000000000400000-0x000000000041F000-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-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4952 set thread context of 4280	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	81
PID 4952 set thread context of 4228	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	90

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4952 wrote to memory of 4280	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	81
PID 4952 wrote to memory of 4280	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	81
PID 4952 wrote to memory of 4280	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	81
PID 4952 wrote to memory of 4280	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	81
PID 4952 wrote to memory of 4280	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	81
PID 4952 wrote to memory of 4280	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	81
PID 4952 wrote to memory of 4280	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	81
PID 4952 wrote to memory of 4280	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	81
PID 4952 wrote to memory of 4228	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	90
PID 4952 wrote to memory of 4228	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	90
PID 4952 wrote to memory of 4228	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	90
PID 4952 wrote to memory of 4228	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	90
PID 4952 wrote to memory of 4228	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	90
PID 4952 wrote to memory of 4228	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	90
PID 4952 wrote to memory of 4228	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	90
PID 4952 wrote to memory of 4228	4952	36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe	90

C:\Users\Admin\AppData\Local\Temp\36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe
"C:\Users\Admin\AppData\Local\Temp\36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4952
- C:\Users\Admin\AppData\Local\Temp\36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\JhaHq8RU9j.ini"
  2⤵
  PID:4280
- C:\Users\Admin\AppData\Local\Temp\36c7dc9449d04743848bc5c43f3418d6d035a17ac382e80299826291d454b083.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\G4RrFgHeGk.ini"
  2⤵
  - Accesses Microsoft Outlook accounts
  PID:4228

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

C:\Users\Admin\AppData\Local\Temp\JhaHq8RU9j.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/4228-143-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4228-145-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4228-146-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4228-147-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4280-135-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4280-137-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4280-138-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4280-139-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4280-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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