isrstealer | 31f9e2b98f96265b9f0b50baa0745dd88077b0a1c3adeb4047d66a6fe801e1a3

Analysis

max time kernel
96s
max time network
98s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
08-10-2024 22:00

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General

Target

26148b8e4595061e7716246a926c2eed_JaffaCakes118.exe
Size

946KB
MD5

26148b8e4595061e7716246a926c2eed
SHA1

1a61f0eea11b5cade43f03aea8eda112ee23480c
SHA256

31f9e2b98f96265b9f0b50baa0745dd88077b0a1c3adeb4047d66a6fe801e1a3
SHA512

98eaf519c6d069f9bbeb6c4b71a87dca4a8fbf6ed77bda73280f2187c64d148af633a5c4ed0ce11e7ffba4c04e8c1796e42c0b9ba1232733b8f32869f1f5f7a7
SSDEEP

12288:6aWzgMg7v3qnCiMErQohh0F4CCJ8lny/QLway9wv+U4iG+D:1aHMv6Corjqny/QLE91FiP

Score

10^/10

isrstealer discovery 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 1 IoCs

resource	yara_rule
behavioral2/files/0x000c000000023ba8-4.dat	family_isrstealer

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	26148b8e4595061e7716246a926c2eed_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
3024	Server.exe

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
T1552.001
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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	Server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	26148b8e4595061e7716246a926c2eed_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3024	Server.exe
3024	Server.exe
3024	Server.exe
3024	Server.exe
3024	Server.exe
3024	Server.exe
3024	Server.exe
3024	Server.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3024	Server.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2324 wrote to memory of 3024	2324	26148b8e4595061e7716246a926c2eed_JaffaCakes118.exe	86
PID 2324 wrote to memory of 3024	2324	26148b8e4595061e7716246a926c2eed_JaffaCakes118.exe	86
PID 2324 wrote to memory of 3024	2324	26148b8e4595061e7716246a926c2eed_JaffaCakes118.exe	86

C:\Users\Admin\AppData\Local\Temp\26148b8e4595061e7716246a926c2eed_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\26148b8e4595061e7716246a926c2eed_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2324
- C:\Users\Admin\AppData\Roaming\Server.exe
  "C:\Users\Admin\AppData\Roaming\Server.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:3024

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

Query Registry

T1012

System Information Discovery

T1082

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\Roaming\Server.exe

Filesize
76KB

MD5
afceef7f15a12be583888fd4cf6c78c4

SHA1
5574539642da242642b84ab6216edaa3f0bc159e

SHA256
33d03627bd449f6dc01bffbb5cc3fb8ebe95dc0f9eb036758440d7e5affbaa4f

SHA512
49ea1eeb55f07cc49f55b4337d4dbd537195d689c8c4336aa09e1723273431356f4e493d40f00b61735982924010fdcadbf4d2cd41c74351d1ff4e36e33e27e6

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