isrstealer | 915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19

Analysis

max time kernel
152s
max time network
164s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
06-12-2022 10:25

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General

Target

915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe
Size

223KB
MD5

81a53142e4c2449072cf3fe30da5125e
SHA1

8bb7d8412cdabca78cf35d3f884988a83f51b03d
SHA256

915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19
SHA512

18d7d7d4556bda3f1cc63956873635882a164dfe47cc425585b398616041ac6f703af3b4599599e0d5dd4ef034b975b30e99700621e79acac5abb8dfb7514e0c
SSDEEP

3072:1z8iM8+Uk+Os7CpruqWqzG/COsp3VDfhGbLlIT/XlQOwm1qe:+8ozGi3NMvlYXlQne

Score

10^/10

isrstealer spyware stealer trojan

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/4900-134-0x0000000000000000-mapping.dmp	family_isrstealer
behavioral2/memory/4900-135-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/4900-139-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/4900-140-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
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 2176 set thread context of 4900	2176	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe	82

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4900	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe
4900	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe
4900	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe
4900	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe
4900	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe
4900	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe
4900	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe
4900	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2176	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe
4900	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2176 wrote to memory of 4900	2176	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe	82
PID 2176 wrote to memory of 4900	2176	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe	82
PID 2176 wrote to memory of 4900	2176	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe	82
PID 2176 wrote to memory of 4900	2176	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe	82
PID 2176 wrote to memory of 4900	2176	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe	82
PID 2176 wrote to memory of 4900	2176	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe	82
PID 2176 wrote to memory of 4900	2176	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe	82
PID 2176 wrote to memory of 4900	2176	915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe	82

C:\Users\Admin\AppData\Local\Temp\915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe
"C:\Users\Admin\AppData\Local\Temp\915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2176
- C:\Users\Admin\AppData\Local\Temp\915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe
  "C:\Users\Admin\AppData\Local\Temp\915ea44cfc6fe8417648d29ec180300f9e413c3d44e5afcf10627ebf42e77c19.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:4900

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/4900-135-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4900-139-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4900-140-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download