isrstealer | af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82

Analysis

max time kernel
145s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
03/10/2022, 08:33

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General

Target
af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe
Size 132KB
Sample221003-kgb3kaggbr
SHA256 af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82
MD5 618f4155bac304c78c792d16bf9c621f
SHA1 84a279f171425f08f6d82641b45fa034bb078902
SHA512 782ad0142aaa3b052d4a862d8879e6b9a3b9384f6175b33d8c1738ef92837627cd5638363ece224dae174425742f783c308e49708c7b9300507fdc9ceeecc140
SSDEEP 3072:MQCmQebYyFI08UsCpCqVu4ef2+2GCf4/1HF2nTb+fsfWSnPORG1/RoEDXB4xOrxm:MQaebYyFI08UsCpCqVu4eO7GCfoHF6ou
MD5 SHA1 SHA512 SSDEEP

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/3592-134-0x0000000000000000-mapping.dmp	family_isrstealer
behavioral2/memory/3592-135-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/3592-139-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/3592-140-0x0000000000400000-0x0000000000414000-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 4384 set thread context of 3592	4384	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe	83

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

System Information Discovery
T1082

Modifies registry class 3 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\MIME\Database	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\MIME\Database\Charset	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\MIME\Database\Codepage	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3592	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe
3592	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe
3592	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe
3592	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe
3592	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe
3592	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe
3592	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe
3592	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4384	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe
3592	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4384 wrote to memory of 3592	4384	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe	83
PID 4384 wrote to memory of 3592	4384	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe	83
PID 4384 wrote to memory of 3592	4384	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe	83
PID 4384 wrote to memory of 3592	4384	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe	83
PID 4384 wrote to memory of 3592	4384	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe	83
PID 4384 wrote to memory of 3592	4384	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe	83
PID 4384 wrote to memory of 3592	4384	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe	83
PID 4384 wrote to memory of 3592	4384	af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe	83

C:\Users\Admin\AppData\Local\Temp\af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe
"C:\Users\Admin\AppData\Local\Temp\af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4384
- C:\Users\Admin\AppData\Local\Temp\af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe
  "C:\Users\Admin\AppData\Local\Temp\af2880ecae68d9343387f01808dbccc39ce14ec8df607a8361783346d893ae82.exe"
  2⤵
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:3592

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

Replay Monitor

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Downloads

memory/3592-135-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/3592-139-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/3592-140-0x0000000000400000-0x0000000000414000-memory.dmp

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