isrstealer | 9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a

Analysis

max time kernel
151s
max time network
180s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
29-11-2022 22:01

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General

Target

9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe
Size

617KB
MD5

31bed3a522ca10e242c67f8ab10f9d37
SHA1

114f3f45abe780839f74c0af5140c86738e4051d
SHA256

9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a
SHA512

b9bebbbcfb0cac1889f2772c73c80fbac42aaf49619650e556171e9a297e2b15a1ff9b25f6a3d4d334b42e41edba400611e7e9fe7d60701f524f9f426ac2adf5
SSDEEP

12288:YALV/JeAZTqkXq3d43O/qQQfcHK0R7axF33333333M33333333u33333333P:zJbZOka308qdf2ExR

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/4348-134-0x0000000000000000-mapping.dmp	family_isrstealer
behavioral2/memory/4348-135-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/4348-152-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/4348-164-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/748-162-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/748-163-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3080-144-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/3080-147-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/3080-154-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Nirsoft 8 IoCs

resource	yara_rule
behavioral2/memory/3080-144-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/3080-147-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/3612-155-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/3612-161-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/748-162-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/748-163-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3612-158-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/3080-154-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3612-148-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/748-153-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3612-151-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/3612-155-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/3612-161-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/748-162-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/748-160-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/748-163-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3612-158-0x0000000000400000-0x0000000000426000-memory.dmp	upx

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
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	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 588 set thread context of 4348	588	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	83
PID 4348 set thread context of 3868	4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	85
PID 3868 set thread context of 3080	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	87
PID 3868 set thread context of 3612	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	88
PID 3868 set thread context of 748	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	89

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe
4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe
4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe
4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe
4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe
4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe
4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe
4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe
3612	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe
3612	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3612	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
588	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe
4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 588 wrote to memory of 4348	588	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	83
PID 588 wrote to memory of 4348	588	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	83
PID 588 wrote to memory of 4348	588	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	83
PID 588 wrote to memory of 4348	588	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	83
PID 588 wrote to memory of 4348	588	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	83
PID 588 wrote to memory of 4348	588	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	83
PID 588 wrote to memory of 4348	588	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	83
PID 588 wrote to memory of 4348	588	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	83
PID 4348 wrote to memory of 3868	4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	85
PID 4348 wrote to memory of 3868	4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	85
PID 4348 wrote to memory of 3868	4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	85
PID 4348 wrote to memory of 3868	4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	85
PID 4348 wrote to memory of 3868	4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	85
PID 4348 wrote to memory of 3868	4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	85
PID 4348 wrote to memory of 3868	4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	85
PID 4348 wrote to memory of 3868	4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	85
PID 4348 wrote to memory of 3868	4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	85
PID 4348 wrote to memory of 3868	4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	85
PID 4348 wrote to memory of 3868	4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	85
PID 4348 wrote to memory of 3868	4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	85
PID 4348 wrote to memory of 3868	4348	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	85
PID 3868 wrote to memory of 3080	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	87
PID 3868 wrote to memory of 3080	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	87
PID 3868 wrote to memory of 3080	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	87
PID 3868 wrote to memory of 3080	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	87
PID 3868 wrote to memory of 3080	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	87
PID 3868 wrote to memory of 3612	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	88
PID 3868 wrote to memory of 3612	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	88
PID 3868 wrote to memory of 3612	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	88
PID 3868 wrote to memory of 3612	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	88
PID 3868 wrote to memory of 3612	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	88
PID 3868 wrote to memory of 748	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	89
PID 3868 wrote to memory of 748	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	89
PID 3868 wrote to memory of 748	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	89
PID 3868 wrote to memory of 748	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	89
PID 3868 wrote to memory of 748	3868	9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe	89

C:\Users\Admin\AppData\Local\Temp\9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe
"C:\Users\Admin\AppData\Local\Temp\9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:588
- C:\Users\Admin\AppData\Local\Temp\9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe
  "C:\Users\Admin\AppData\Local\Temp\9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4348
- - C:\Users\Admin\AppData\Local\Temp\9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe
    "C:\Users\Admin\AppData\Local\Temp\9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3868
  - - C:\Users\Admin\AppData\Local\Temp\9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe
      "C:\Users\Admin\AppData\Local\Temp\9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      PID:3080
  - - C:\Users\Admin\AppData\Local\Temp\9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe
      "C:\Users\Admin\AppData\Local\Temp\9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3612
  - - C:\Users\Admin\AppData\Local\Temp\9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe
      "C:\Users\Admin\AppData\Local\Temp\9b5340f9ea0f93b3af781ccc59de7b274f0d7b3e29e52d3d8d433d37910c0d8a.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
      4⤵
      Accesses Microsoft Outlook accounts
      PID:748

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/748-162-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/748-163-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/748-153-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/748-160-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3080-147-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/3080-154-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/3080-144-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/3612-158-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/3612-148-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/3612-155-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/3612-151-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/3612-161-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/3868-156-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/3868-159-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/3868-141-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/3868-142-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/3868-140-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4348-135-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/4348-152-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/4348-164-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download