isrstealer | 505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d

Analysis

max time kernel
91s
max time network
164s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
21-10-2022 19:19

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe
Size

2.0MB
MD5

5ad2eac3004666af59bf963bc4e9e35b
SHA1

dc430a94ef5d682097883844b3d2ee6cad351cfa
SHA256

505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d
SHA512

308a9ed760b55edf85b3e95bd639727208c3cb4a94ee9d2e00514cce2a4b025bf6e6b5ab670236ed8baa533dac29a4a8b6366b3c867f9f86329de7467edf75c2
SSDEEP

49152:FSVaY9utNzMKYX8qeYyyoC0Rrwyv5D9IPYkgKeG6m5:FS8YkzV/qeYNoCoIPYkgs

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 3 IoCs

resource	yara_rule
behavioral2/memory/5040-134-0x0000000000400000-0x000000000047B000-memory.dmp	family_isrstealer
behavioral2/memory/5040-147-0x0000000000400000-0x000000000047B000-memory.dmp	family_isrstealer
behavioral2/memory/5040-163-0x0000000000400000-0x000000000047B000-memory.dmp	family_isrstealer

NirSoft MailPassView 12 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/5040-134-0x0000000000400000-0x000000000047B000-memory.dmp	MailPassView
behavioral2/memory/3680-139-0x0000000000000000-mapping.dmp	MailPassView
behavioral2/memory/3680-140-0x0000000000400000-0x000000000046B000-memory.dmp	MailPassView
behavioral2/memory/3680-142-0x0000000000400000-0x000000000046B000-memory.dmp	MailPassView
behavioral2/memory/3680-141-0x0000000000400000-0x000000000046B000-memory.dmp	MailPassView
behavioral2/memory/3680-145-0x0000000000400000-0x000000000046B000-memory.dmp	MailPassView
behavioral2/memory/5040-147-0x0000000000400000-0x000000000047B000-memory.dmp	MailPassView
behavioral2/memory/1812-154-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView
behavioral2/memory/3680-159-0x0000000000400000-0x000000000046B000-memory.dmp	MailPassView
behavioral2/memory/1812-161-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView
behavioral2/memory/1812-158-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView
behavioral2/memory/5040-163-0x0000000000400000-0x000000000047B000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3140-144-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/3140-150-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/3140-156-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Nirsoft 17 IoCs

resource	yara_rule
behavioral2/memory/5040-134-0x0000000000400000-0x000000000047B000-memory.dmp	Nirsoft
behavioral2/memory/3680-139-0x0000000000000000-mapping.dmp	Nirsoft
behavioral2/memory/3680-140-0x0000000000400000-0x000000000046B000-memory.dmp	Nirsoft
behavioral2/memory/3680-142-0x0000000000400000-0x000000000046B000-memory.dmp	Nirsoft
behavioral2/memory/3680-141-0x0000000000400000-0x000000000046B000-memory.dmp	Nirsoft
behavioral2/memory/3140-144-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/3680-145-0x0000000000400000-0x000000000046B000-memory.dmp	Nirsoft
behavioral2/memory/5040-147-0x0000000000400000-0x000000000047B000-memory.dmp	Nirsoft
behavioral2/memory/3140-150-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/1812-154-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral2/memory/3140-156-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4448-155-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/3680-159-0x0000000000400000-0x000000000046B000-memory.dmp	Nirsoft
behavioral2/memory/4448-160-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/1812-161-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral2/memory/1812-158-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral2/memory/5040-163-0x0000000000400000-0x000000000047B000-memory.dmp	Nirsoft

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5064-132-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral2/memory/5064-137-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral2/memory/4448-149-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4448-153-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4448-155-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4448-160-0x0000000000400000-0x0000000000426000-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-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/5064-132-0x0000000000400000-0x00000000004E5000-memory.dmp	autoit_exe
behavioral2/memory/5064-137-0x0000000000400000-0x00000000004E5000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 5064 set thread context of 5040	5064	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	81
PID 5040 set thread context of 3680	5040	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	82
PID 3680 set thread context of 3140	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	83
PID 3680 set thread context of 4448	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	84
PID 3680 set thread context of 1812	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	85

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 2 IoCs

pid	Process
4448	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe
4448	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4448	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5040	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 5064 wrote to memory of 5040	5064	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	81
PID 5064 wrote to memory of 5040	5064	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	81
PID 5064 wrote to memory of 5040	5064	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	81
PID 5064 wrote to memory of 5040	5064	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	81
PID 5064 wrote to memory of 5040	5064	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	81
PID 5064 wrote to memory of 5040	5064	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	81
PID 5040 wrote to memory of 3680	5040	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	82
PID 5040 wrote to memory of 3680	5040	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	82
PID 5040 wrote to memory of 3680	5040	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	82
PID 5040 wrote to memory of 3680	5040	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	82
PID 5040 wrote to memory of 3680	5040	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	82
PID 5040 wrote to memory of 3680	5040	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	82
PID 5040 wrote to memory of 3680	5040	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	82
PID 5040 wrote to memory of 3680	5040	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	82
PID 5040 wrote to memory of 3680	5040	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	82
PID 5040 wrote to memory of 3680	5040	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	82
PID 5040 wrote to memory of 3680	5040	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	82
PID 5040 wrote to memory of 3680	5040	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	82
PID 5040 wrote to memory of 3680	5040	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	82
PID 3680 wrote to memory of 3140	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	83
PID 3680 wrote to memory of 3140	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	83
PID 3680 wrote to memory of 3140	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	83
PID 3680 wrote to memory of 3140	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	83
PID 3680 wrote to memory of 3140	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	83
PID 3680 wrote to memory of 4448	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	84
PID 3680 wrote to memory of 4448	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	84
PID 3680 wrote to memory of 4448	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	84
PID 3680 wrote to memory of 4448	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	84
PID 3680 wrote to memory of 4448	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	84
PID 3680 wrote to memory of 1812	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	85
PID 3680 wrote to memory of 1812	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	85
PID 3680 wrote to memory of 1812	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	85
PID 3680 wrote to memory of 1812	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	85
PID 3680 wrote to memory of 1812	3680	505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe	85

C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe
"C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5064
- C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe
  "C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5040
- - C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe
    "C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3680
  - - C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe
      "C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      PID:3140
  - - C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe
      "C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4448
  - - C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe
      "C:\Users\Admin\AppData\Local\Temp\505926213d0418decb55fbe3461957a6ce462430e43f1967e02c80933270db6d.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
      4⤵
      Accesses Microsoft Outlook accounts
      PID:1812

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\data.dmp

Filesize
54B

MD5
c10dbeca73f8835240e08e4511284b83

SHA1
0032f8f941cc07768189ca6ba32b1beede6b6917

SHA256
0b6b62094048f0a069b4582f837afcb941db51340d0b16d578e8cbe8603a071e

SHA512
34f7ab8b4ab7b4996b82ffc49198103ef245ee7dd5ccfec793a9ee391b9e9bb30bd3916b4ebeaa9c66a4b5ca42f8572418f16dc83d41073bc94389c19916b967

Download Submit
memory/1812-154-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1812-158-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1812-161-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/3140-144-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/3140-156-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/3140-150-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/3680-142-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/3680-141-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/3680-140-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/3680-145-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/3680-159-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/4448-153-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4448-149-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4448-155-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4448-160-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/5040-147-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/5040-134-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/5040-163-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/5064-132-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/5064-137-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download