isrstealer | ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999

Analysis

max time kernel
159s
max time network
168s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
29-11-2022 03:30

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General

Target

ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
Size

906KB
MD5

a2404c8be4795675d7f4a099bc1f7f23
SHA1

f62d28b712c4f302c8b6fca67025bc822322790c
SHA256

ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999
SHA512

bfd2f510ce6f549d74ae9b374b077027861f837e616d71c5a9ac93b2795af6b72e2bae265d4cdc4beab1076c4d35a4bffa9a9272d741f5399b70f3e1175e5188
SSDEEP

24576:YM4Yhyf7AyLs++JOorZg44nN5fNH4D0zkmcr:SYUA+2cc

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 2 IoCs

resource	yara_rule
behavioral2/memory/4772-135-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer
behavioral2/memory/4772-137-0x0000000000400000-0x0000000000470000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2224-161-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/2224-162-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4676-146-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4676-150-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4676-157-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Nirsoft 7 IoCs

resource	yara_rule
behavioral2/memory/4676-146-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4676-150-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4676-157-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4636-156-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/4636-160-0x0000000000400000-0x0000000000426000-memory.dmp	Nirsoft
behavioral2/memory/2224-161-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/2224-162-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4636-149-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4636-154-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/2224-153-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4636-156-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/4636-160-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/2224-161-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2224-158-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2224-162-0x0000000000400000-0x000000000041F000-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-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 4208 set thread context of 4772	4208	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	81
PID 4772 set thread context of 4728	4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	82
PID 4728 set thread context of 4676	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	83
PID 4728 set thread context of 4636	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	84
PID 4728 set thread context of 2224	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.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 10 IoCs

pid	Process
4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
4636	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
4636	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4208	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
Token: SeDebugPrivilege	4636	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 4208 wrote to memory of 4772	4208	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	81
PID 4208 wrote to memory of 4772	4208	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	81
PID 4208 wrote to memory of 4772	4208	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	81
PID 4208 wrote to memory of 4772	4208	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	81
PID 4208 wrote to memory of 4772	4208	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	81
PID 4208 wrote to memory of 4772	4208	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	81
PID 4208 wrote to memory of 4772	4208	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	81
PID 4208 wrote to memory of 4772	4208	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	81
PID 4772 wrote to memory of 4728	4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	82
PID 4772 wrote to memory of 4728	4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	82
PID 4772 wrote to memory of 4728	4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	82
PID 4772 wrote to memory of 4728	4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	82
PID 4772 wrote to memory of 4728	4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	82
PID 4772 wrote to memory of 4728	4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	82
PID 4772 wrote to memory of 4728	4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	82
PID 4772 wrote to memory of 4728	4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	82
PID 4772 wrote to memory of 4728	4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	82
PID 4772 wrote to memory of 4728	4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	82
PID 4772 wrote to memory of 4728	4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	82
PID 4772 wrote to memory of 4728	4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	82
PID 4772 wrote to memory of 4728	4772	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	82
PID 4728 wrote to memory of 4676	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	83
PID 4728 wrote to memory of 4676	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	83
PID 4728 wrote to memory of 4676	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	83
PID 4728 wrote to memory of 4676	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	83
PID 4728 wrote to memory of 4676	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	83
PID 4728 wrote to memory of 4636	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	84
PID 4728 wrote to memory of 4636	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	84
PID 4728 wrote to memory of 4636	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	84
PID 4728 wrote to memory of 4636	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	84
PID 4728 wrote to memory of 4636	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	84
PID 4728 wrote to memory of 2224	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	85
PID 4728 wrote to memory of 2224	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	85
PID 4728 wrote to memory of 2224	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	85
PID 4728 wrote to memory of 2224	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	85
PID 4728 wrote to memory of 2224	4728	ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe	85

C:\Users\Admin\AppData\Local\Temp\ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
"C:\Users\Admin\AppData\Local\Temp\ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4208
- C:\Users\Admin\AppData\Local\Temp\ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
  C:\Users\Admin\AppData\Local\Temp\ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4772
- - C:\Users\Admin\AppData\Local\Temp\ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
    "C:\Users\Admin\AppData\Local\Temp\ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4728
  - - C:\Users\Admin\AppData\Local\Temp\ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
      "C:\Users\Admin\AppData\Local\Temp\ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      PID:4676
  - - C:\Users\Admin\AppData\Local\Temp\ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
      "C:\Users\Admin\AppData\Local\Temp\ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4636
  - - C:\Users\Admin\AppData\Local\Temp\ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe
      "C:\Users\Admin\AppData\Local\Temp\ab17327ee4a1c40b4df98948d69e66949d77619d9fb912265a91fa0cac15e999.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
      4⤵
      Accesses Microsoft Outlook accounts
      PID:2224

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/2224-162-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2224-158-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2224-161-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2224-153-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4208-133-0x0000000074A00000-0x0000000074FB1000-memory.dmp

Filesize
5.7MB

Download
memory/4208-138-0x0000000074A00000-0x0000000074FB1000-memory.dmp

Filesize
5.7MB

Download
memory/4208-132-0x0000000074A00000-0x0000000074FB1000-memory.dmp

Filesize
5.7MB

Download
memory/4636-160-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4636-156-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4636-149-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4636-154-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4676-157-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4676-150-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4676-146-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4728-144-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4728-143-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4728-142-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4728-159-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/4772-137-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download
memory/4772-135-0x0000000000400000-0x0000000000470000-memory.dmp

Filesize
448KB

Download