isrstealer | 6ec666b625d998be056ef6a06cef4b0acd2b4ac3388fc8d6c0203fe38beddb23

Analysis

max time kernel
118s
max time network
125s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
31-12-2023 13:18

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General

Target

37b1c273a335253d2b417d957157fd0b.exe
Size

228KB
MD5

37b1c273a335253d2b417d957157fd0b
SHA1

76d45899889a817e70da1e7e860e1fcc92466beb
SHA256

6ec666b625d998be056ef6a06cef4b0acd2b4ac3388fc8d6c0203fe38beddb23
SHA512

cbebd70bd5913e46bf735e7c71830467abb7dfa7c4c16f1b50bc1713db763b494a2948be3e1a74a4f21e39e45ad7da9acb34e850444708b9b367d10038efef2b
SSDEEP

3072:MYRPRvEagxL0du9VoWNDfAiD3iUZ2t6Yht1w9rI9M+mSIZ24dhLjNk0hTE0Ntgte:M8EjiWN10ht1wu9LK7JjaKT38hu19

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
behavioral1/memory/568-7583-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/568-7587-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/568-7592-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/568-7593-0x0000000000400000-0x0000000000414000-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
T1552.001
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
T1552.001

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3044 set thread context of 568	3044	37b1c273a335253d2b417d957157fd0b.exe	28

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
568	37b1c273a335253d2b417d957157fd0b.exe
568	37b1c273a335253d2b417d957157fd0b.exe
568	37b1c273a335253d2b417d957157fd0b.exe
568	37b1c273a335253d2b417d957157fd0b.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3044	37b1c273a335253d2b417d957157fd0b.exe
568	37b1c273a335253d2b417d957157fd0b.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3044 wrote to memory of 568	3044	37b1c273a335253d2b417d957157fd0b.exe	28
PID 3044 wrote to memory of 568	3044	37b1c273a335253d2b417d957157fd0b.exe	28
PID 3044 wrote to memory of 568	3044	37b1c273a335253d2b417d957157fd0b.exe	28
PID 3044 wrote to memory of 568	3044	37b1c273a335253d2b417d957157fd0b.exe	28
PID 3044 wrote to memory of 568	3044	37b1c273a335253d2b417d957157fd0b.exe	28
PID 3044 wrote to memory of 568	3044	37b1c273a335253d2b417d957157fd0b.exe	28
PID 3044 wrote to memory of 568	3044	37b1c273a335253d2b417d957157fd0b.exe	28
PID 3044 wrote to memory of 568	3044	37b1c273a335253d2b417d957157fd0b.exe	28

C:\Users\Admin\AppData\Local\Temp\37b1c273a335253d2b417d957157fd0b.exe
"C:\Users\Admin\AppData\Local\Temp\37b1c273a335253d2b417d957157fd0b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3044
- C:\Users\Admin\AppData\Local\Temp\37b1c273a335253d2b417d957157fd0b.exe
  "C:\Users\Admin\AppData\Local\Temp\37b1c273a335253d2b417d957157fd0b.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:568

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/568-7581-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/568-7579-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/568-7583-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/568-7585-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/568-7587-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/568-7592-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/568-7593-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3044-7404-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/3044-7450-0x0000000000250000-0x0000000000251000-memory.dmp

Filesize
4KB

Download
memory/3044-7451-0x0000000000260000-0x0000000000261000-memory.dmp

Filesize
4KB

Download
memory/3044-7496-0x00000000002A0000-0x00000000002A1000-memory.dmp

Filesize
4KB

Download
memory/3044-7578-0x00000000003E0000-0x00000000003E1000-memory.dmp

Filesize
4KB

Download