isrstealer | 00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd

General

Target

00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe
Size

255KB
MD5

c47fdbbcdf367c12dfd7a96e20614c0b
SHA1

519294e1f4f544e5aebaddd4877d8b767e4c80d8
SHA256

00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd
SHA512

c69b1730d2d1a03777c423767a2d206dad6b7988594ef2380f236f6f9170e22046a03fd1e1d7ec9ba69ebf47ce9bc161398f1fe8d2d9e8ae53da4d333114364c
SSDEEP

6144:B6Uw9T3VMNy7GNkF0BOwDoSVRXzH1JaEn:M3lGu+B95VRXzH1Ja

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

ISR Stealer payload 2 IoCs

resource	yara_rule
behavioral2/memory/2100-142-0x0000000000400000-0x0000000000448000-memory.dmp	family_isrstealer
behavioral2/memory/2100-149-0x0000000000400000-0x0000000000448000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4592-147-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4592-148-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4592-150-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/4592-147-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4592-148-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4592-150-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2100-132-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral2/memory/3036-136-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3036-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3036-139-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3036-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2100-142-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral2/memory/4592-144-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4592-146-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4592-147-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4592-148-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2100-149-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral2/memory/4592-150-0x0000000000400000-0x000000000041F000-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-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2100 set thread context of 3036	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	83
PID 2100 set thread context of 4592	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	84

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 3036	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	83
PID 2100 wrote to memory of 3036	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	83
PID 2100 wrote to memory of 3036	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	83
PID 2100 wrote to memory of 3036	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	83
PID 2100 wrote to memory of 3036	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	83
PID 2100 wrote to memory of 3036	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	83
PID 2100 wrote to memory of 3036	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	83
PID 2100 wrote to memory of 3036	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	83
PID 2100 wrote to memory of 4592	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	84
PID 2100 wrote to memory of 4592	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	84
PID 2100 wrote to memory of 4592	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	84
PID 2100 wrote to memory of 4592	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	84
PID 2100 wrote to memory of 4592	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	84
PID 2100 wrote to memory of 4592	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	84
PID 2100 wrote to memory of 4592	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	84
PID 2100 wrote to memory of 4592	2100	00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe	84

C:\Users\Admin\AppData\Local\Temp\00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe
"C:\Users\Admin\AppData\Local\Temp\00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2100
- C:\Users\Admin\AppData\Local\Temp\00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\G4sEThOjAN.ini"
  2⤵
  PID:3036
- C:\Users\Admin\AppData\Local\Temp\00e33ba91a09986e4b7ea94aa32d619ff4b5776e74d009aeeeaf534acdda9ddd.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\0cXTiHQMgk.ini"
  2⤵
  - Accesses Microsoft Outlook accounts
  PID:4592

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\G4sEThOjAN.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2100-149-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/2100-142-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/2100-132-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/3036-138-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3036-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3036-139-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3036-136-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4592-144-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4592-146-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4592-147-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4592-148-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4592-150-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

Sharing