isrstealer | 4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e

General

Target

4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe
Size

268KB
MD5

47dff67b61ade1b6905d2a11c176ee70
SHA1

41b3a83e6cd715e61e343a0fda9258cc474bdf00
SHA256

4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e
SHA512

4108206309796fcc50ad10ae72e5706c2add69c717192cc2174d95880ebc4d7773cb40c32403ff227837434df76ad08e15bd149bda239c6f95bf155dfe30f9c7
SSDEEP

6144:bYb//1PxwpdIKCC0ef//uXltKc+LVsz9b8R4jvLXou:xpdFeCXuLKcCVsz6SDLXo

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/2160-145-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/2160-146-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/2160-145-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/2160-146-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3360-135-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3360-137-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3360-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3360-139-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2160-142-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2160-144-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2160-145-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2160-146-0x0000000000400000-0x000000000041F000-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-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2276 set thread context of 3360	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	78
PID 2276 set thread context of 2160	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	80

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2276 wrote to memory of 3360	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	78
PID 2276 wrote to memory of 3360	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	78
PID 2276 wrote to memory of 3360	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	78
PID 2276 wrote to memory of 3360	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	78
PID 2276 wrote to memory of 3360	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	78
PID 2276 wrote to memory of 3360	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	78
PID 2276 wrote to memory of 3360	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	78
PID 2276 wrote to memory of 3360	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	78
PID 2276 wrote to memory of 2160	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	80
PID 2276 wrote to memory of 2160	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	80
PID 2276 wrote to memory of 2160	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	80
PID 2276 wrote to memory of 2160	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	80
PID 2276 wrote to memory of 2160	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	80
PID 2276 wrote to memory of 2160	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	80
PID 2276 wrote to memory of 2160	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	80
PID 2276 wrote to memory of 2160	2276	4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe	80

C:\Users\Admin\AppData\Local\Temp\4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe
"C:\Users\Admin\AppData\Local\Temp\4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2276
- C:\Users\Admin\AppData\Local\Temp\4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\4Nou3CDCsy.ini"
  2⤵
  PID:3360
- C:\Users\Admin\AppData\Local\Temp\4a764259016f2f94d5ac816ced803fd1c35bcda6ebc50e2b2b030d767813fc4e.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\7isXHHLwyp.ini"
  2⤵
  - Accesses Microsoft Outlook accounts
  PID:2160

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\4Nou3CDCsy.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2160-142-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2160-144-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2160-145-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2160-146-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3360-135-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3360-137-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3360-138-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3360-139-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

Sharing