isrstealer | cf242e41eb5aceaf698df23202a4981518edce73773a801bef74eec05032aa8e

Analysis

max time kernel
118s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
04-12-2024 21:10

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General

Target

c466acccd65b0e9eda78d83f1d906def_JaffaCakes118.exe
Size

280KB
MD5

c466acccd65b0e9eda78d83f1d906def
SHA1

1e00df90d1578967edef3ef3f8b83c4459703b5c
SHA256

cf242e41eb5aceaf698df23202a4981518edce73773a801bef74eec05032aa8e
SHA512

117bfc3f0a6e514348a28cf8e62f42e5cae8e6afc0f33a3166b6a95934722f0ce0cd9dc9de1fdadb95439b8be2bb43c0885eb78d0f20e1ef67df677566109bca
SSDEEP

6144:C3bdXPx32dIKCC0ef//uXltKc+LVsz9b8CxvTV5ndkhPFZt:02dFeCXuLKcCVsz6CxvTV5nkPLt

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 2420 set thread context of 1256	2420	c466acccd65b0e9eda78d83f1d906def_JaffaCakes118.exe	30

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1256-2-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1256-6-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1256-5-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1256-4-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1256-8-0x0000000000400000-0x0000000000453000-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	c466acccd65b0e9eda78d83f1d906def_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c466acccd65b0e9eda78d83f1d906def_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2420	c466acccd65b0e9eda78d83f1d906def_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2420 wrote to memory of 1256	2420	c466acccd65b0e9eda78d83f1d906def_JaffaCakes118.exe	30
PID 2420 wrote to memory of 1256	2420	c466acccd65b0e9eda78d83f1d906def_JaffaCakes118.exe	30
PID 2420 wrote to memory of 1256	2420	c466acccd65b0e9eda78d83f1d906def_JaffaCakes118.exe	30
PID 2420 wrote to memory of 1256	2420	c466acccd65b0e9eda78d83f1d906def_JaffaCakes118.exe	30
PID 2420 wrote to memory of 1256	2420	c466acccd65b0e9eda78d83f1d906def_JaffaCakes118.exe	30
PID 2420 wrote to memory of 1256	2420	c466acccd65b0e9eda78d83f1d906def_JaffaCakes118.exe	30
PID 2420 wrote to memory of 1256	2420	c466acccd65b0e9eda78d83f1d906def_JaffaCakes118.exe	30
PID 2420 wrote to memory of 1256	2420	c466acccd65b0e9eda78d83f1d906def_JaffaCakes118.exe	30
PID 2420 wrote to memory of 1256	2420	c466acccd65b0e9eda78d83f1d906def_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\c466acccd65b0e9eda78d83f1d906def_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\c466acccd65b0e9eda78d83f1d906def_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2420
- C:\Users\Admin\AppData\Local\Temp\c466acccd65b0e9eda78d83f1d906def_JaffaCakes118.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\KgaP1uKEkR.ini"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1256

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\KgaP1uKEkR.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1256-2-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1256-6-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1256-5-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1256-4-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1256-8-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download