isrstealer | 0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8

General

Target

0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe
Size

1015KB
MD5

b231ec61a670c8ce4469c8e027894e8f
SHA1

b701c849435bb024f8f63f3097d7de48e01b9235
SHA256

0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8
SHA512

f2f58b6e051b7e59cd4466e06c616a66d2f32d390dcfe5c5281de243b699717ef5c4f92233c05ca519d0feae76bbcc7e250fa7f0a819eb1aca4c511b877206c0
SSDEEP

12288:uaWzgMg7v3qnCiMErQohh0F4CCJ8lny/Qg8rq9oGE15jSsFZyoopnWCD+z:ZaHMv6Corjqny/QgS8oRNFZyo7C2

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/1512-133-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1512-142-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1512-152-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/1852-148-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/1852-149-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/1852-151-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/1852-148-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/1852-149-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/1852-151-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4392-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4392-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4392-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4392-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1852-145-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1852-147-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1852-148-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1852-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1852-151-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4392-150-0x0000000000400000-0x0000000000453000-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-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3028 set thread context of 1512	3028	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	82
PID 1512 set thread context of 4392	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	83
PID 1512 set thread context of 1852	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	84

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
3028	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe
3028	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe
3028	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
3028	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe
3028	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe
3028	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3028 wrote to memory of 1512	3028	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	82
PID 3028 wrote to memory of 1512	3028	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	82
PID 3028 wrote to memory of 1512	3028	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	82
PID 3028 wrote to memory of 1512	3028	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	82
PID 3028 wrote to memory of 1512	3028	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	82
PID 3028 wrote to memory of 1512	3028	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	82
PID 3028 wrote to memory of 1512	3028	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	82
PID 1512 wrote to memory of 4392	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	83
PID 1512 wrote to memory of 4392	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	83
PID 1512 wrote to memory of 4392	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	83
PID 1512 wrote to memory of 4392	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	83
PID 1512 wrote to memory of 4392	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	83
PID 1512 wrote to memory of 4392	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	83
PID 1512 wrote to memory of 4392	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	83
PID 1512 wrote to memory of 4392	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	83
PID 1512 wrote to memory of 1852	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	84
PID 1512 wrote to memory of 1852	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	84
PID 1512 wrote to memory of 1852	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	84
PID 1512 wrote to memory of 1852	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	84
PID 1512 wrote to memory of 1852	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	84
PID 1512 wrote to memory of 1852	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	84
PID 1512 wrote to memory of 1852	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	84
PID 1512 wrote to memory of 1852	1512	0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe	84

C:\Users\Admin\AppData\Local\Temp\0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe
"C:\Users\Admin\AppData\Local\Temp\0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:3028
- C:\Users\Admin\AppData\Local\Temp\0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe
  "C:\Users\Admin\AppData\Local\Temp\0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1512
- - C:\Users\Admin\AppData\Local\Temp\0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\JyyV0BkD3l.ini"
    3⤵
    PID:4392
- - C:\Users\Admin\AppData\Local\Temp\0057c90386d014411d0269b2578959911f519f01ee99c50d56401a905389c9f8.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\WZ8LCZHg3d.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1852

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/1512-142-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1512-133-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1512-152-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1852-149-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1852-145-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1852-147-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1852-148-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1852-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4392-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4392-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4392-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4392-138-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4392-150-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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