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 4 IoCs

resource	yara_rule
behavioral2/memory/5060-133-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/5060-143-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/5060-145-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/5060-152-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4404-150-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4404-151-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/4404-150-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4404-151-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4772-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4772-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4772-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4772-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4404-147-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4404-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4404-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4404-151-0x0000000000400000-0x000000000041F000-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-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4984 set thread context of 5060	4984	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	82
PID 5060 set thread context of 4772	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	83
PID 5060 set thread context of 4404	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	88

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
4984	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe
4984	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe
4984	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
4984	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe
4984	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe
4984	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4984 wrote to memory of 5060	4984	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	82
PID 4984 wrote to memory of 5060	4984	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	82
PID 4984 wrote to memory of 5060	4984	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	82
PID 4984 wrote to memory of 5060	4984	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	82
PID 4984 wrote to memory of 5060	4984	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	82
PID 4984 wrote to memory of 5060	4984	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	82
PID 4984 wrote to memory of 5060	4984	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	82
PID 5060 wrote to memory of 4772	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	83
PID 5060 wrote to memory of 4772	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	83
PID 5060 wrote to memory of 4772	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	83
PID 5060 wrote to memory of 4772	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	83
PID 5060 wrote to memory of 4772	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	83
PID 5060 wrote to memory of 4772	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	83
PID 5060 wrote to memory of 4772	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	83
PID 5060 wrote to memory of 4772	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	83
PID 5060 wrote to memory of 4404	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	88
PID 5060 wrote to memory of 4404	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	88
PID 5060 wrote to memory of 4404	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	88
PID 5060 wrote to memory of 4404	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	88
PID 5060 wrote to memory of 4404	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	88
PID 5060 wrote to memory of 4404	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	88
PID 5060 wrote to memory of 4404	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	88
PID 5060 wrote to memory of 4404	5060	2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe	88

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:4984
- 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:5060
- - C:\Users\Admin\AppData\Local\Temp\2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\B5URn1Zidj.ini"
    3⤵
    PID:4772
- - C:\Users\Admin\AppData\Local\Temp\2ab572573b1f3f18d40d629f0a81c5412d065f8cece86afe3479d2c74a83cd53.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\g8GLuHlOP9.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:4404

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\B5URn1Zidj.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/4404-149-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4404-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4404-150-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4404-147-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4772-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4772-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4772-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4772-138-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5060-145-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/5060-143-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/5060-133-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/5060-152-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

Sharing