isrstealer | f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6

Analysis

max time kernel
91s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
28/10/2022, 22:36

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe
Size 304KB
Sample221028-2jby1sabc7
SHA256 f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6
MD5 70593ba12aadb972c6b6b2b024c5158c
SHA1 2d3e5c9cd1d90062d007394903e2448751eb38ba
SHA512 4966300f7ef8183a7ed2e293c559c4e6feba29de5bf8b73265a1a9f29440db99c8b33250af33098673bee47a9b9e3a3eb88efe27c883233c93701287fbe759fb
SSDEEP 6144:QYhfXzkpnfP89l3hz88HSvYYI6KYM7HRw6wCsQytN6LbC2N:QYponfU7BP+YYJKbK1BcLbZN
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

ISR Stealer payload 4 IoCs

resource	yara_rule
behavioral2/memory/3204-135-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3204-143-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3204-148-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3204-155-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/952-153-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/952-154-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/952-153-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/952-154-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1052-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1052-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1052-145-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1052-146-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/952-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/952-152-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/952-153-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/952-154-0x0000000000400000-0x000000000041F000-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	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1852 set thread context of 3204	1852	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	89
PID 3204 set thread context of 1052	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	90
PID 3204 set thread context of 952	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	91

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1852 wrote to memory of 3204	1852	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	89
PID 1852 wrote to memory of 3204	1852	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	89
PID 1852 wrote to memory of 3204	1852	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	89
PID 1852 wrote to memory of 3204	1852	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	89
PID 1852 wrote to memory of 3204	1852	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	89
PID 1852 wrote to memory of 3204	1852	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	89
PID 1852 wrote to memory of 3204	1852	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	89
PID 1852 wrote to memory of 3204	1852	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	89
PID 3204 wrote to memory of 1052	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	90
PID 3204 wrote to memory of 1052	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	90
PID 3204 wrote to memory of 1052	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	90
PID 3204 wrote to memory of 1052	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	90
PID 3204 wrote to memory of 1052	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	90
PID 3204 wrote to memory of 1052	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	90
PID 3204 wrote to memory of 1052	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	90
PID 3204 wrote to memory of 1052	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	90
PID 3204 wrote to memory of 952	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	91
PID 3204 wrote to memory of 952	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	91
PID 3204 wrote to memory of 952	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	91
PID 3204 wrote to memory of 952	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	91
PID 3204 wrote to memory of 952	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	91
PID 3204 wrote to memory of 952	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	91
PID 3204 wrote to memory of 952	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	91
PID 3204 wrote to memory of 952	3204	f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe	91

C:\Users\Admin\AppData\Local\Temp\f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe
"C:\Users\Admin\AppData\Local\Temp\f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1852
- C:\Users\Admin\AppData\Local\Temp\f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe
  "C:\Users\Admin\AppData\Local\Temp\f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3204
- - C:\Users\Admin\AppData\Local\Temp\f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\XFMnmm9S0r.ini"
    3⤵
    PID:1052
- - C:\Users\Admin\AppData\Local\Temp\f1f5a8399efdf4dd727b63369c5342604c257b591cd5683b33be1ad2f88132a6.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\lFvTF4qkX5.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:952

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

Loading Replay Monitor...

Downloads

XFMnmm9S0r.ini

Path C:\Users\Admin\AppData\Local\Temp\XFMnmm9S0r.ini
Size 5B
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3
MD5 SHA1 SHA512

Submit Download

memory/952-154-0x0000000000400000-0x000000000041F000-memory.dmp

Download

memory/952-153-0x0000000000400000-0x000000000041F000-memory.dmp

Download

memory/952-152-0x0000000000400000-0x000000000041F000-memory.dmp

Download

memory/952-150-0x0000000000400000-0x000000000041F000-memory.dmp

Download

memory/1052-141-0x0000000000400000-0x0000000000453000-memory.dmp

Download

memory/1052-144-0x0000000000400000-0x0000000000453000-memory.dmp

Download

memory/1052-145-0x0000000000400000-0x0000000000453000-memory.dmp

Download

memory/1052-146-0x0000000000400000-0x0000000000453000-memory.dmp

Download

memory/1852-138-0x0000000074660000-0x0000000074C11000-memory.dmp

Download

memory/1852-132-0x0000000074660000-0x0000000074C11000-memory.dmp

Download

memory/1852-133-0x0000000074660000-0x0000000074C11000-memory.dmp

Download

memory/3204-148-0x0000000000400000-0x0000000000442000-memory.dmp

Download

memory/3204-143-0x0000000000400000-0x0000000000442000-memory.dmp

Download

memory/3204-135-0x0000000000400000-0x0000000000442000-memory.dmp

Download

memory/3204-155-0x0000000000400000-0x0000000000442000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads