isrstealer | 7159dc8eee8e2cfbeb071acc877a4f499cd0110146311f045b0279f0a77047ff

Analysis

max time kernel
139s
max time network
181s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
30-11-2022 09:03

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

7159dc8eee8e2cfbeb071acc877a4f499cd0110146311f045b0279f0a77047ff.exe
Size

1.1MB
MD5

7d1cc2d002bae3faebd68f653cd4273f
SHA1

1151f7fb080c0d24785bbcb63868757f7598fc57
SHA256

7159dc8eee8e2cfbeb071acc877a4f499cd0110146311f045b0279f0a77047ff
SHA512

6011e19b15b7f00b8011608da316667cef50fb760528b554e7a8182d6ea037a468f134a9a9c9063f9aea659b02183fe14ea7208a839e0d990e06229250ab23fc
SSDEEP

12288:m/O2MP+/sybq5p3hQxz9qKav7CSfnfmC7Bl04eMQWLNSMjc2OfbXqqE0K17FP7uw:Nr0U30a+SDrpjOfN/KLDj

Score

10^/10

isrstealer collection persistence 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/4576-134-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/4576-146-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/4576-169-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/4576-170-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4064-167-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4064-168-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4092-149-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4092-154-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4092-163-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Nirsoft 7 IoCs

resource	yara_rule
behavioral2/memory/4092-149-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4092-154-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4092-163-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/204-159-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/204-165-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/4064-167-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4064-168-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

Executes dropped EXE 5 IoCs

pid	Process
4576	winlogon.exe
1432	winlogon.exe
4092	winlogon.exe
204	winlogon.exe
4064	winlogon.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/204-153-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/204-157-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4064-160-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/204-159-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4064-166-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/204-165-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4064-167-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4064-168-0x0000000000400000-0x000000000041F000-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-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	winlogon.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Winlogon = "C:\\Users\\Admin\\AppData\\Roaming\\Winlogon.exe"	7159dc8eee8e2cfbeb071acc877a4f499cd0110146311f045b0279f0a77047ff.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 2476 set thread context of 4576	2476	7159dc8eee8e2cfbeb071acc877a4f499cd0110146311f045b0279f0a77047ff.exe	82
PID 4576 set thread context of 1432	4576	winlogon.exe	83
PID 1432 set thread context of 4092	1432	winlogon.exe	85
PID 1432 set thread context of 204	1432	winlogon.exe	86
PID 1432 set thread context of 4064	1432	winlogon.exe	87

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 11 IoCs

pid	Process
2476	7159dc8eee8e2cfbeb071acc877a4f499cd0110146311f045b0279f0a77047ff.exe
4576	winlogon.exe
4576	winlogon.exe
4576	winlogon.exe
4576	winlogon.exe
4576	winlogon.exe
4576	winlogon.exe
4576	winlogon.exe
4576	winlogon.exe
204	winlogon.exe
204	winlogon.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2476	7159dc8eee8e2cfbeb071acc877a4f499cd0110146311f045b0279f0a77047ff.exe
Token: SeDebugPrivilege	204	winlogon.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4576	winlogon.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 2476 wrote to memory of 4576	2476	7159dc8eee8e2cfbeb071acc877a4f499cd0110146311f045b0279f0a77047ff.exe	82
PID 2476 wrote to memory of 4576	2476	7159dc8eee8e2cfbeb071acc877a4f499cd0110146311f045b0279f0a77047ff.exe	82
PID 2476 wrote to memory of 4576	2476	7159dc8eee8e2cfbeb071acc877a4f499cd0110146311f045b0279f0a77047ff.exe	82
PID 2476 wrote to memory of 4576	2476	7159dc8eee8e2cfbeb071acc877a4f499cd0110146311f045b0279f0a77047ff.exe	82
PID 2476 wrote to memory of 4576	2476	7159dc8eee8e2cfbeb071acc877a4f499cd0110146311f045b0279f0a77047ff.exe	82
PID 2476 wrote to memory of 4576	2476	7159dc8eee8e2cfbeb071acc877a4f499cd0110146311f045b0279f0a77047ff.exe	82
PID 2476 wrote to memory of 4576	2476	7159dc8eee8e2cfbeb071acc877a4f499cd0110146311f045b0279f0a77047ff.exe	82
PID 2476 wrote to memory of 4576	2476	7159dc8eee8e2cfbeb071acc877a4f499cd0110146311f045b0279f0a77047ff.exe	82
PID 4576 wrote to memory of 1432	4576	winlogon.exe	83
PID 4576 wrote to memory of 1432	4576	winlogon.exe	83
PID 4576 wrote to memory of 1432	4576	winlogon.exe	83
PID 4576 wrote to memory of 1432	4576	winlogon.exe	83
PID 4576 wrote to memory of 1432	4576	winlogon.exe	83
PID 4576 wrote to memory of 1432	4576	winlogon.exe	83
PID 4576 wrote to memory of 1432	4576	winlogon.exe	83
PID 4576 wrote to memory of 1432	4576	winlogon.exe	83
PID 4576 wrote to memory of 1432	4576	winlogon.exe	83
PID 4576 wrote to memory of 1432	4576	winlogon.exe	83
PID 4576 wrote to memory of 1432	4576	winlogon.exe	83
PID 4576 wrote to memory of 1432	4576	winlogon.exe	83
PID 4576 wrote to memory of 1432	4576	winlogon.exe	83
PID 1432 wrote to memory of 4092	1432	winlogon.exe	85
PID 1432 wrote to memory of 4092	1432	winlogon.exe	85
PID 1432 wrote to memory of 4092	1432	winlogon.exe	85
PID 1432 wrote to memory of 4092	1432	winlogon.exe	85
PID 1432 wrote to memory of 4092	1432	winlogon.exe	85
PID 1432 wrote to memory of 204	1432	winlogon.exe	86
PID 1432 wrote to memory of 204	1432	winlogon.exe	86
PID 1432 wrote to memory of 204	1432	winlogon.exe	86
PID 1432 wrote to memory of 204	1432	winlogon.exe	86
PID 1432 wrote to memory of 204	1432	winlogon.exe	86
PID 1432 wrote to memory of 4064	1432	winlogon.exe	87
PID 1432 wrote to memory of 4064	1432	winlogon.exe	87
PID 1432 wrote to memory of 4064	1432	winlogon.exe	87
PID 1432 wrote to memory of 4064	1432	winlogon.exe	87
PID 1432 wrote to memory of 4064	1432	winlogon.exe	87

C:\Users\Admin\AppData\Local\Temp\7159dc8eee8e2cfbeb071acc877a4f499cd0110146311f045b0279f0a77047ff.exe
"C:\Users\Admin\AppData\Local\Temp\7159dc8eee8e2cfbeb071acc877a4f499cd0110146311f045b0279f0a77047ff.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2476
- C:\Users\Admin\AppData\Local\Temp\AppLaunch\winlogon.exe
  C:\Users\Admin\AppData\Local\Temp\\AppLaunch\winlogon.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4576
- - C:\Users\Admin\AppData\Local\Temp\AppLaunch\winlogon.exe
    "C:\Users\Admin\AppData\Local\Temp\AppLaunch\winlogon.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1432
  - - C:\Users\Admin\AppData\Local\Temp\AppLaunch\winlogon.exe
      "C:\Users\Admin\AppData\Local\Temp\AppLaunch\winlogon.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      Executes dropped EXE
      PID:4092
  - - C:\Users\Admin\AppData\Local\Temp\AppLaunch\winlogon.exe
      "C:\Users\Admin\AppData\Local\Temp\AppLaunch\winlogon.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:204
  - - C:\Users\Admin\AppData\Local\Temp\AppLaunch\winlogon.exe
      "C:\Users\Admin\AppData\Local\Temp\AppLaunch\winlogon.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
      4⤵
      Executes dropped EXE
      Accesses Microsoft Outlook accounts
      PID:4064

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\AppLaunch\winlogon.exe

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
C:\Users\Admin\AppData\Local\Temp\AppLaunch\winlogon.exe

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
C:\Users\Admin\AppData\Local\Temp\AppLaunch\winlogon.exe

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
C:\Users\Admin\AppData\Local\Temp\AppLaunch\winlogon.exe

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
C:\Users\Admin\AppData\Local\Temp\AppLaunch\winlogon.exe

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
C:\Users\Admin\AppData\Local\Temp\AppLaunch\winlogon.exe

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
memory/204-159-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/204-157-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/204-165-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/204-153-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1432-144-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/1432-142-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/1432-145-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/1432-147-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/1432-164-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2476-138-0x0000000075340000-0x00000000758F1000-memory.dmp

Filesize
5.7MB

Download
memory/2476-132-0x0000000075340000-0x00000000758F1000-memory.dmp

Filesize
5.7MB

Download
memory/4064-167-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4064-168-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4064-166-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4064-160-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4092-163-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4092-154-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4092-149-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4576-134-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/4576-146-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/4576-169-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/4576-170-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download