isrstealer | 45c658ef310219f5a5ab81c9ef0095b9cb076403531874c35296e0a975962193

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
26-12-2023 13:24

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General

Target

723a1496ac20595d955bbc575f61ff38.exe
Size

400KB
MD5

723a1496ac20595d955bbc575f61ff38
SHA1

d59a78036ee7395f352ae2e40ed59d739d481704
SHA256

45c658ef310219f5a5ab81c9ef0095b9cb076403531874c35296e0a975962193
SHA512

d931c295ae0d4d9c564becb977b3ac8f2fd84275db99a32f79450d8b766c9c1f5fff7f50fe4293540a30a8f6c31d71eff5a8c9d311f7c56b1ce03dc2af454c34
SSDEEP

6144:aoffjUCgjgXbZxx/XHTNmF1WWC04Wzva6X:aAIibZX4004UXX

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/1296-4-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/1296-2-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/1296-7-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/1296-9-0x0000000000400000-0x0000000000414000-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 1460 set thread context of 1296	1460	723a1496ac20595d955bbc575f61ff38.exe	22

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1296	723a1496ac20595d955bbc575f61ff38.exe
1296	723a1496ac20595d955bbc575f61ff38.exe
1296	723a1496ac20595d955bbc575f61ff38.exe
1296	723a1496ac20595d955bbc575f61ff38.exe
1296	723a1496ac20595d955bbc575f61ff38.exe
1296	723a1496ac20595d955bbc575f61ff38.exe
1296	723a1496ac20595d955bbc575f61ff38.exe
1296	723a1496ac20595d955bbc575f61ff38.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1460	723a1496ac20595d955bbc575f61ff38.exe
1296	723a1496ac20595d955bbc575f61ff38.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1460 wrote to memory of 1296	1460	723a1496ac20595d955bbc575f61ff38.exe	22
PID 1460 wrote to memory of 1296	1460	723a1496ac20595d955bbc575f61ff38.exe	22
PID 1460 wrote to memory of 1296	1460	723a1496ac20595d955bbc575f61ff38.exe	22
PID 1460 wrote to memory of 1296	1460	723a1496ac20595d955bbc575f61ff38.exe	22
PID 1460 wrote to memory of 1296	1460	723a1496ac20595d955bbc575f61ff38.exe	22
PID 1460 wrote to memory of 1296	1460	723a1496ac20595d955bbc575f61ff38.exe	22
PID 1460 wrote to memory of 1296	1460	723a1496ac20595d955bbc575f61ff38.exe	22
PID 1460 wrote to memory of 1296	1460	723a1496ac20595d955bbc575f61ff38.exe	22

C:\Users\Admin\AppData\Local\Temp\723a1496ac20595d955bbc575f61ff38.exe
"C:\Users\Admin\AppData\Local\Temp\723a1496ac20595d955bbc575f61ff38.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1460
- C:\Users\Admin\AppData\Local\Temp\723a1496ac20595d955bbc575f61ff38.exe
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:1296

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/1296-4-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1296-2-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1296-7-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1296-9-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download