isrstealer | 3a53eda9346ab154e6b4e6ed65dda380bef32eb0a42e28ef541cbd47ceb7a433

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
05/03/2025, 02:06

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General

Target

JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe
Size

306KB
MD5

500464ffcc8e1ad67ccf9422d1d60b17
SHA1

752857b8dceffc1e7fd5e626b27445662a08beec
SHA256

3a53eda9346ab154e6b4e6ed65dda380bef32eb0a42e28ef541cbd47ceb7a433
SHA512

da9ac7ac0f424b84b195d09d2f552583866110058da692518327419bc419faa87f2207a72988aa0837fdc9eecb4bd59e8e19c98be5dd9d2f0ed572a19a219f9d
SSDEEP

6144:cvUdSIJJXhy4dlUnxjWY/lLngffHKOH46bnVjeTtF:cvULJXhxUJYlHFbnVatF

Score

10^/10

isrstealer discovery 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 1 IoCs

resource	yara_rule
behavioral1/memory/2412-7-0x0000000000370000-0x00000000005F1000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2256 set thread context of 2412	2256	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	30

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2852	2412	WerFault.exe	30

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Explorer.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2256	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe
2412	Explorer.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2256 wrote to memory of 2412	2256	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	30
PID 2256 wrote to memory of 2412	2256	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	30
PID 2256 wrote to memory of 2412	2256	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	30
PID 2256 wrote to memory of 2412	2256	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	30
PID 2256 wrote to memory of 2412	2256	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	30
PID 2256 wrote to memory of 2412	2256	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	30
PID 2256 wrote to memory of 2412	2256	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	30
PID 2256 wrote to memory of 2412	2256	JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe	30
PID 2412 wrote to memory of 2852	2412	Explorer.exe	31
PID 2412 wrote to memory of 2852	2412	Explorer.exe	31
PID 2412 wrote to memory of 2852	2412	Explorer.exe	31
PID 2412 wrote to memory of 2852	2412	Explorer.exe	31

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_500464ffcc8e1ad67ccf9422d1d60b17.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2256
- C:\Windows\SysWOW64\Explorer.exe
  Explorer.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2412
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2412 -s 188
    3⤵
    - Program crash
    PID:2852

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2256-2-0x0000000000401000-0x0000000000410000-memory.dmp

Filesize
60KB

Download
memory/2256-5-0x0000000000401000-0x0000000000410000-memory.dmp

Filesize
60KB

Download
memory/2412-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2412-7-0x0000000000370000-0x00000000005F1000-memory.dmp

Filesize
2.5MB

Download