isrstealer | 30b05b5f0efd6d5e71fde66fb9d360470a880ac04003b5665796aa3d0bac5d2a

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
01/03/2025, 03:07

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General

Target

JaffaCakes118_36532bd11cfa323c79a3b3d455788e40.exe
Size

208KB
MD5

36532bd11cfa323c79a3b3d455788e40
SHA1

49a2b1b817a0a6d8f281d0716c2b4322289d3460
SHA256

30b05b5f0efd6d5e71fde66fb9d360470a880ac04003b5665796aa3d0bac5d2a
SHA512

5a78a7f38a97fbd64f9ef2b7fc40e38bf4b267eb72a5c2ca83414365d38a8886a0ac93db96ca0bed6f8f70c60f9e95bfc0fab18c54ec13eff422e43638863176
SSDEEP

6144:V3bdXPx3KdIKCC0ef//uXltKc+LVsz9b8:BKdFeCXuLKcCVsz6

Score

10^/10

isrstealer discovery spyware stealer trojan upx

Malware Config

Signatures

ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
trojan stealer isrstealer
Isrstealer family
isrstealer
Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2716 set thread context of 4888	2716	JaffaCakes118_36532bd11cfa323c79a3b3d455788e40.exe	84

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4888-2-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4888-4-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4888-6-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4888-5-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4888-8-0x0000000000400000-0x0000000000453000-memory.dmp	upx

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_36532bd11cfa323c79a3b3d455788e40.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_36532bd11cfa323c79a3b3d455788e40.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2716	JaffaCakes118_36532bd11cfa323c79a3b3d455788e40.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2716 wrote to memory of 4888	2716	JaffaCakes118_36532bd11cfa323c79a3b3d455788e40.exe	84
PID 2716 wrote to memory of 4888	2716	JaffaCakes118_36532bd11cfa323c79a3b3d455788e40.exe	84
PID 2716 wrote to memory of 4888	2716	JaffaCakes118_36532bd11cfa323c79a3b3d455788e40.exe	84
PID 2716 wrote to memory of 4888	2716	JaffaCakes118_36532bd11cfa323c79a3b3d455788e40.exe	84
PID 2716 wrote to memory of 4888	2716	JaffaCakes118_36532bd11cfa323c79a3b3d455788e40.exe	84
PID 2716 wrote to memory of 4888	2716	JaffaCakes118_36532bd11cfa323c79a3b3d455788e40.exe	84
PID 2716 wrote to memory of 4888	2716	JaffaCakes118_36532bd11cfa323c79a3b3d455788e40.exe	84
PID 2716 wrote to memory of 4888	2716	JaffaCakes118_36532bd11cfa323c79a3b3d455788e40.exe	84

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_36532bd11cfa323c79a3b3d455788e40.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_36532bd11cfa323c79a3b3d455788e40.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2716
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_36532bd11cfa323c79a3b3d455788e40.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\y5ScwRnbAU.ini"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4888

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\y5ScwRnbAU.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/4888-2-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4888-4-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4888-6-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4888-5-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4888-8-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download