isrstealer | 1ce6a38b35f833c24a30a8fcbf107c781dc47a27990b3c1fdc04c420c3b88b7d

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240730-en
resource tags

arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
submitted
02-08-2024 01:24

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General

Target

82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe
Size

215KB
MD5

82800ea690f33cb08cee91bc93c125ed
SHA1

2cfe0745860a3d4ab3ceb3294dc65f6109067c90
SHA256

1ce6a38b35f833c24a30a8fcbf107c781dc47a27990b3c1fdc04c420c3b88b7d
SHA512

3f92df78c2b89b7c87945a55e375b178cbe790fb245c47544008341ffb37fb90187d85ceb1c6f7d4b351ed1908fb7f1867b8c7d90310503c36bf2144291bdf23
SSDEEP

1536:o2+QgZRa6s1ibsjLuMtzxRX4x6+ngPBpECejwQ/q2kViOHyayHh635x9BxSGvRua:oq28pYh+MXaX+q6u

Score

10^/10

isrstealer discovery persistence 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

Processes:

resource	yara_rule
behavioral2/memory/1228-4-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/1228-6-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/1228-11-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/1228-14-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3881032017-2947584075-2120384563-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Java Update = "C:\\Users\\Admin\\AppData\\Local\\Temp\\KgFLHSWkGIRaVyPhCV.exe"	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe

description pid process target process

PID 1120 set thread context of 1228 1120 82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe vbc.exe

description	pid	process	target process
PID 1120 set thread context of 1228	1120	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	vbc.exe

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

Processes:

82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exevbc.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

vbc.exe

pid process

1228 vbc.exe
1228 vbc.exe
1228 vbc.exe
1228 vbc.exe
1228 vbc.exe
1228 vbc.exe
1228 vbc.exe
1228 vbc.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

1228 vbc.exe

pid	process
1228	vbc.exe
1228	vbc.exe
1228	vbc.exe
1228	vbc.exe
1228	vbc.exe
1228	vbc.exe
1228	vbc.exe
1228	vbc.exe

pid	process
1228	vbc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe

description	pid	process	target process
PID 1120 wrote to memory of 1228	1120	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	vbc.exe
PID 1120 wrote to memory of 1228	1120	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	vbc.exe
PID 1120 wrote to memory of 1228	1120	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	vbc.exe
PID 1120 wrote to memory of 1228	1120	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	vbc.exe
PID 1120 wrote to memory of 1228	1120	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	vbc.exe
PID 1120 wrote to memory of 1228	1120	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	vbc.exe
PID 1120 wrote to memory of 1228	1120	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	vbc.exe
PID 1120 wrote to memory of 1228	1120	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1120
- C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:1228

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

T1064

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Scripting

T1064

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/1120-0-0x00000000747D2000-0x00000000747D3000-memory.dmp

Filesize
4KB

Download
memory/1120-1-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/1120-2-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/1120-10-0x00000000747D0000-0x0000000074D81000-memory.dmp

Filesize
5.7MB

Download
memory/1228-4-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1228-6-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1228-11-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1228-14-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download