isrstealer | 98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5

General

Target

98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe
Size

1.1MB
MD5

e35687e3714e19014b9e43a0c36afedd
SHA1

37dd099b797e0217801aa84262b70da3963c53ad
SHA256

98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5
SHA512

992ee9d97a91abb169781a4da304f0640e1565f7e8e956353617d682132c5d38bd06759658c451003303d8c10d40c5d208709dd6a58c42a79ba641e3521dc47f
SSDEEP

12288:3aWzgMg7v3qnCiMErQohh0F4CCJ8lny/QVP7emswirRI5j01VdZqFowjtaAt2Pvj:KaHMv6Corjqny/Q5PIRIS1VLAh0AtnsB

Score

10^/10

isrstealer 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/3220-133-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/3220-134-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/3220-141-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4412-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4412-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4412-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4412-143-0x0000000000400000-0x0000000000453000-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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3220 set thread context of 4412	3220	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe	83

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
432	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe
432	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe
432	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
432	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe
432	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe
432	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3220	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 432 wrote to memory of 3220	432	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe	82
PID 432 wrote to memory of 3220	432	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe	82
PID 432 wrote to memory of 3220	432	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe	82
PID 432 wrote to memory of 3220	432	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe	82
PID 432 wrote to memory of 3220	432	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe	82
PID 432 wrote to memory of 3220	432	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe	82
PID 3220 wrote to memory of 4412	3220	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe	83
PID 3220 wrote to memory of 4412	3220	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe	83
PID 3220 wrote to memory of 4412	3220	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe	83
PID 3220 wrote to memory of 4412	3220	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe	83
PID 3220 wrote to memory of 4412	3220	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe	83
PID 3220 wrote to memory of 4412	3220	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe	83
PID 3220 wrote to memory of 4412	3220	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe	83
PID 3220 wrote to memory of 4412	3220	98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe	83

C:\Users\Admin\AppData\Local\Temp\98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe
"C:\Users\Admin\AppData\Local\Temp\98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe"
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:432
- C:\Users\Admin\AppData\Local\Temp\98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe
  "C:\Users\Admin\AppData\Local\Temp\98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3220
- - C:\Users\Admin\AppData\Local\Temp\98443dba8b3a6fed8e3642e06e5a424074b59aa7e830fc24947114e270719fc5.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    PID:4412

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

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3220-133-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/3220-134-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/3220-141-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/4412-138-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4412-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4412-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4412-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

Sharing