isrstealer | 2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53

General

Target

2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe
Size

1.0MB
MD5

174505b7760c7282e1a9968b6cba6201
SHA1

660ddb36bc89927426411052e0de4d208d084830
SHA256

2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53
SHA512

5ae50f25a3fbbce2e329e9ba0bed2247aa58ed5b2b5102235b69d4575fd041b5bb63ba8d8f0ea73fc958d0ff8b7957382b168df9ed7173a19ad7883183dee62e
SSDEEP

12288:VH7Wcjdc/r2sxxiPGGAOOPSXDV8ClgVYhX5FSsf8QwtQM9wgNaEP5rKtOnrZsWzK:VbCj2sObHtqQ4QM9vNacNK0SQOb/9

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 6 IoCs

resource	yara_rule
behavioral1/memory/700-58-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/700-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/700-61-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/700-71-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/700-73-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/700-82-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2020-80-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/2020-81-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/2020-80-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/2020-81-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/864-65-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/864-69-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/864-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/864-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/864-74-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/2020-75-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2020-79-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2020-80-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/2020-81-0x0000000000400000-0x000000000041F000-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-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1252 set thread context of 700	1252	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	28
PID 700 set thread context of 864	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	29
PID 700 set thread context of 2020	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	30

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

System Information Discovery
T1082

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
1252	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe
1252	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe
1252	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
1252	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe
1252	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe
1252	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 1252 wrote to memory of 700	1252	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	28
PID 1252 wrote to memory of 700	1252	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	28
PID 1252 wrote to memory of 700	1252	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	28
PID 1252 wrote to memory of 700	1252	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	28
PID 1252 wrote to memory of 700	1252	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	28
PID 1252 wrote to memory of 700	1252	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	28
PID 1252 wrote to memory of 700	1252	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	28
PID 700 wrote to memory of 864	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	29
PID 700 wrote to memory of 864	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	29
PID 700 wrote to memory of 864	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	29
PID 700 wrote to memory of 864	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	29
PID 700 wrote to memory of 864	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	29
PID 700 wrote to memory of 864	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	29
PID 700 wrote to memory of 864	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	29
PID 700 wrote to memory of 864	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	29
PID 700 wrote to memory of 864	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	29
PID 700 wrote to memory of 2020	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	30
PID 700 wrote to memory of 2020	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	30
PID 700 wrote to memory of 2020	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	30
PID 700 wrote to memory of 2020	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	30
PID 700 wrote to memory of 2020	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	30
PID 700 wrote to memory of 2020	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	30
PID 700 wrote to memory of 2020	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	30
PID 700 wrote to memory of 2020	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	30
PID 700 wrote to memory of 2020	700	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	30

C:\Users\Admin\AppData\Local\Temp\2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe
"C:\Users\Admin\AppData\Local\Temp\2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1252
- C:\Users\Admin\AppData\Local\Temp\2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe
  "C:\Users\Admin\AppData\Local\Temp\2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:700
- - C:\Users\Admin\AppData\Local\Temp\2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\ByBDorSvOL.ini"
    3⤵
    PID:864
- - C:\Users\Admin\AppData\Local\Temp\2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\3aKyirvC7X.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:2020

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/700-71-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/700-55-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/700-56-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/700-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/700-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/700-82-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/700-73-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/864-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/864-69-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/864-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/864-74-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/864-65-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1252-54-0x0000000076381000-0x0000000076383000-memory.dmp

Filesize
8KB

Download
memory/2020-75-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2020-79-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2020-80-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2020-81-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

Sharing