isrstealer | 823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c

Analysis

max time kernel
68s
max time network
132s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
04-10-2022 01:47

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General

Target

823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe
Size

433KB
MD5

01e9bd4f08e9c2180c75b05745bbcc61
SHA1

1e5f93011efb8b7acbea411a956e58e250a7d8b0
SHA256

823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c
SHA512

f591612759201137ce9576676ef421330c2b9560985ef45f2cbfb6564add81fbed0361561b78c8ec374e5765798fd4c2afa709dcc2f0cf344c81f951d63f38c4
SSDEEP

12288:SLWrL0zjHmIhqikdF1jerA9PNohh7nSERNVF:SLWrgz77NU9PNOnlRN/

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 8 IoCs

resource	yara_rule
behavioral2/memory/4260-133-0x0000000000400000-0x0000000000449000-memory.dmp	family_isrstealer
behavioral2/memory/4260-135-0x0000000000400000-0x0000000000449000-memory.dmp	family_isrstealer
behavioral2/memory/1336-137-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4260-138-0x0000000000400000-0x0000000000449000-memory.dmp	family_isrstealer
behavioral2/memory/1336-140-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1336-148-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1336-158-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1336-159-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2728-156-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/2728-157-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/2728-156-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/2728-157-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1784-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1784-146-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1784-147-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1784-149-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1784-150-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2728-153-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2728-155-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2728-156-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2728-157-0x0000000000400000-0x000000000041F000-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	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1016 set thread context of 4260	1016	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	83
PID 4260 set thread context of 1336	4260	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	84
PID 1336 set thread context of 1784	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	85
PID 1336 set thread context of 2728	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	90

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1016 wrote to memory of 4260	1016	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	83
PID 1016 wrote to memory of 4260	1016	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	83
PID 1016 wrote to memory of 4260	1016	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	83
PID 1016 wrote to memory of 4260	1016	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	83
PID 1016 wrote to memory of 4260	1016	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	83
PID 1016 wrote to memory of 4260	1016	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	83
PID 1016 wrote to memory of 4260	1016	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	83
PID 1016 wrote to memory of 4260	1016	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	83
PID 1016 wrote to memory of 4260	1016	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	83
PID 1016 wrote to memory of 4260	1016	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	83
PID 1016 wrote to memory of 4260	1016	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	83
PID 4260 wrote to memory of 1336	4260	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	84
PID 4260 wrote to memory of 1336	4260	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	84
PID 4260 wrote to memory of 1336	4260	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	84
PID 4260 wrote to memory of 1336	4260	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	84
PID 4260 wrote to memory of 1336	4260	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	84
PID 4260 wrote to memory of 1336	4260	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	84
PID 4260 wrote to memory of 1336	4260	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	84
PID 4260 wrote to memory of 1336	4260	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	84
PID 1336 wrote to memory of 1784	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	85
PID 1336 wrote to memory of 1784	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	85
PID 1336 wrote to memory of 1784	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	85
PID 1336 wrote to memory of 1784	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	85
PID 1336 wrote to memory of 1784	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	85
PID 1336 wrote to memory of 1784	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	85
PID 1336 wrote to memory of 1784	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	85
PID 1336 wrote to memory of 1784	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	85
PID 1336 wrote to memory of 2728	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	90
PID 1336 wrote to memory of 2728	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	90
PID 1336 wrote to memory of 2728	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	90
PID 1336 wrote to memory of 2728	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	90
PID 1336 wrote to memory of 2728	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	90
PID 1336 wrote to memory of 2728	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	90
PID 1336 wrote to memory of 2728	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	90
PID 1336 wrote to memory of 2728	1336	823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe	90

C:\Users\Admin\AppData\Local\Temp\823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe
"C:\Users\Admin\AppData\Local\Temp\823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1016
- C:\Users\Admin\AppData\Local\Temp\823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe
  "C:\Users\Admin\AppData\Local\Temp\823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:4260
- - C:\Users\Admin\AppData\Local\Temp\823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe
    "C:\Users\Admin\AppData\Local\Temp\823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1336
  - - C:\Users\Admin\AppData\Local\Temp\823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe
      /scomma "C:\Users\Admin\AppData\Local\Temp\onZXT70HQx.ini"
      4⤵
      PID:1784
  - - C:\Users\Admin\AppData\Local\Temp\823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe
      /scomma "C:\Users\Admin\AppData\Local\Temp\O8qsWm400y.ini"
      4⤵
      Accesses Microsoft Outlook accounts
      PID:2728

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\onZXT70HQx.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1336-140-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1336-158-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1336-137-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1336-159-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1336-148-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1784-150-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1784-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1784-146-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1784-147-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1784-149-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2728-153-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2728-155-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2728-156-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2728-157-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4260-138-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/4260-135-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download
memory/4260-133-0x0000000000400000-0x0000000000449000-memory.dmp

Filesize
292KB

Download