isrstealer | e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0

Analysis

max time kernel
168s
max time network
172s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
11/10/2022, 14:38

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General

Target
e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe
Size 428KB
Sample221011-rzn86saag8
SHA256 e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0
MD5 4ee385fa9e0f5e74edd7ea0d934c910e
SHA1 c36832e47c5b567019709ac3dc7bb661b9805096
SHA512 914c7237ff0698440de85483bb85fdade779b2368714c9e5b174c09710a323e218996deb14b49e0124b1fd6ffd62de966f6f6364a37705bc33030ba842559e93
SSDEEP 12288:MuV2Qf1qkkAucZSvfooQZPPL2w07O5IISjQXEzw6o9GjE9cgd:bHYjcZSvjmqw06O3Q0MCE9cgd
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/4544-133-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4544-138-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4544-152-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4544-153-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/1488-150-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/1488-151-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/1488-150-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/1488-151-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2088-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2088-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2088-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2088-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1488-147-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1488-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1488-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1488-151-0x0000000000400000-0x000000000041F000-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-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4068 set thread context of 4544	4068	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	82
PID 4544 set thread context of 2088	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	83
PID 4544 set thread context of 1488	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	84

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4068	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe
4068	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe
4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4068 wrote to memory of 4544	4068	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	82
PID 4068 wrote to memory of 4544	4068	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	82
PID 4068 wrote to memory of 4544	4068	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	82
PID 4068 wrote to memory of 4544	4068	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	82
PID 4068 wrote to memory of 4544	4068	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	82
PID 4068 wrote to memory of 4544	4068	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	82
PID 4068 wrote to memory of 4544	4068	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	82
PID 4068 wrote to memory of 4544	4068	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	82
PID 4544 wrote to memory of 2088	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	83
PID 4544 wrote to memory of 2088	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	83
PID 4544 wrote to memory of 2088	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	83
PID 4544 wrote to memory of 2088	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	83
PID 4544 wrote to memory of 2088	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	83
PID 4544 wrote to memory of 2088	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	83
PID 4544 wrote to memory of 2088	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	83
PID 4544 wrote to memory of 2088	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	83
PID 4544 wrote to memory of 1488	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	84
PID 4544 wrote to memory of 1488	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	84
PID 4544 wrote to memory of 1488	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	84
PID 4544 wrote to memory of 1488	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	84
PID 4544 wrote to memory of 1488	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	84
PID 4544 wrote to memory of 1488	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	84
PID 4544 wrote to memory of 1488	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	84
PID 4544 wrote to memory of 1488	4544	e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe	84

C:\Users\Admin\AppData\Local\Temp\e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe
"C:\Users\Admin\AppData\Local\Temp\e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4068
- C:\Users\Admin\AppData\Local\Temp\e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe
  C:\Users\Admin\AppData\Local\Temp\e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4544
- - C:\Users\Admin\AppData\Local\Temp\e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\Zdj14BEJ7V.ini"
    3⤵
    PID:2088
- - C:\Users\Admin\AppData\Local\Temp\e9aa538880b28eaf56908bf44eb2d0db6690c9588224d68fc7f7ed50cb2022c0.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\N0yNLKNEuY.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1488

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

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Downloads

Zdj14BEJ7V.ini

Path C:\Users\Admin\AppData\Local\Temp\Zdj14BEJ7V.ini
Size 5B
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3
MD5 SHA1 SHA512

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memory/1488-151-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/1488-150-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/1488-149-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/1488-147-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/2088-143-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/2088-144-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/2088-142-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/2088-140-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/4068-135-0x0000000000A70000-0x0000000000A74000-memory.dmp

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memory/4544-138-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/4544-133-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/4544-152-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/4544-153-0x0000000000400000-0x0000000000442000-memory.dmp

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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