isrstealer | 35e6db625e5143f7506e27153776623aa36e32bd8df2c8efabf053aa7aff3d1b

Analysis

max time kernel
163s
max time network
181s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
26/12/2023, 05:27

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target

Battlefield 3 Aimbot/WinJect.exe
Size

540KB
MD5

6abce2783394bf829a97599d04a8def3
SHA1

2a7864232650cf6528c903ec505e4fc1cc59517c
SHA256

29ab5fe35a0f48c4683adf37e978abbfff23c0b2f8b416d58b18690ebf41a66a
SHA512

8c07c4b105296747f6224f161b00250e5fa54c4f7b2ad33313b91f4116917064f4acc315f664688346d0272bc77953c338fe40d4ed6e0fd5e5ad507f12cdf7b4
SSDEEP

6144:dHEUWvcNBG1R741QrIJvnjqHByUkz/urMkHug25ijoBFQi7f0u1WeJiXpH4raGpt:pFG1d4gIJLqcU9OgiioSOLKR4rFMgn

Score

10^/10

isrstealer bootkit persistence 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 4 IoCs

resource	yara_rule
behavioral4/memory/3508-33-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral4/memory/3508-36-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral4/memory/3508-41-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral4/memory/3508-43-0x0000000000400000-0x0000000000414000-memory.dmp	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-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	WinJect.exe

Executes dropped EXE 4 IoCs

pid	Process
1060	Winject.exe
4344	0718i2vupW.exe
4948	0718i2vupW.exe
3508	0718i2vupW.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 2 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

Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	0718i2vupW.exe
File opened for modification	\??\PhysicalDrive0	WinJect.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1712 set thread context of 2228	1712	WinJect.exe	91
PID 4344 set thread context of 4948	4344	0718i2vupW.exe	98
PID 4948 set thread context of 3508	4948	0718i2vupW.exe	99

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3508	0718i2vupW.exe
3508	0718i2vupW.exe
3508	0718i2vupW.exe
3508	0718i2vupW.exe
3508	0718i2vupW.exe
3508	0718i2vupW.exe
3508	0718i2vupW.exe
3508	0718i2vupW.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
1712	WinJect.exe
2228	WinJect.exe
4344	0718i2vupW.exe
4948	0718i2vupW.exe
3508	0718i2vupW.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1712 wrote to memory of 2228	1712	WinJect.exe	91
PID 1712 wrote to memory of 2228	1712	WinJect.exe	91
PID 1712 wrote to memory of 2228	1712	WinJect.exe	91
PID 1712 wrote to memory of 2228	1712	WinJect.exe	91
PID 1712 wrote to memory of 2228	1712	WinJect.exe	91
PID 1712 wrote to memory of 2228	1712	WinJect.exe	91
PID 1712 wrote to memory of 2228	1712	WinJect.exe	91
PID 1712 wrote to memory of 2228	1712	WinJect.exe	91
PID 2228 wrote to memory of 1060	2228	WinJect.exe	94
PID 2228 wrote to memory of 1060	2228	WinJect.exe	94
PID 2228 wrote to memory of 1060	2228	WinJect.exe	94
PID 2228 wrote to memory of 4344	2228	WinJect.exe	95
PID 2228 wrote to memory of 4344	2228	WinJect.exe	95
PID 2228 wrote to memory of 4344	2228	WinJect.exe	95
PID 4344 wrote to memory of 4948	4344	0718i2vupW.exe	98
PID 4344 wrote to memory of 4948	4344	0718i2vupW.exe	98
PID 4344 wrote to memory of 4948	4344	0718i2vupW.exe	98
PID 4344 wrote to memory of 4948	4344	0718i2vupW.exe	98
PID 4344 wrote to memory of 4948	4344	0718i2vupW.exe	98
PID 4344 wrote to memory of 4948	4344	0718i2vupW.exe	98
PID 4344 wrote to memory of 4948	4344	0718i2vupW.exe	98
PID 4344 wrote to memory of 4948	4344	0718i2vupW.exe	98
PID 4948 wrote to memory of 3508	4948	0718i2vupW.exe	99
PID 4948 wrote to memory of 3508	4948	0718i2vupW.exe	99
PID 4948 wrote to memory of 3508	4948	0718i2vupW.exe	99
PID 4948 wrote to memory of 3508	4948	0718i2vupW.exe	99
PID 4948 wrote to memory of 3508	4948	0718i2vupW.exe	99
PID 4948 wrote to memory of 3508	4948	0718i2vupW.exe	99
PID 4948 wrote to memory of 3508	4948	0718i2vupW.exe	99
PID 4948 wrote to memory of 3508	4948	0718i2vupW.exe	99

C:\Users\Admin\AppData\Local\Temp\Battlefield 3 Aimbot\WinJect.exe
"C:\Users\Admin\AppData\Local\Temp\Battlefield 3 Aimbot\WinJect.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1712
- C:\Users\Admin\AppData\Local\Temp\Battlefield 3 Aimbot\WinJect.exe
  "C:\Users\Admin\AppData\Local\Temp\Battlefield 3 Aimbot\WinJect.exe"
  2⤵
  - Checks computer location settings
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2228
- - C:\Users\Admin\AppData\Local\Temp\Winject.exe
    "C:\Users\Admin\AppData\Local\Temp\Winject.exe"
    3⤵
    - Executes dropped EXE
    PID:1060
- - C:\Users\Admin\AppData\Local\Temp\0718i2vupW.exe
    "C:\Users\Admin\AppData\Local\Temp\0718i2vupW.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4344
  - - C:\Users\Admin\AppData\Local\Temp\0718i2vupW.exe
      "C:\Users\Admin\AppData\Local\Temp\0718i2vupW.exe"
      4⤵
      Executes dropped EXE
      Writes to the Master Boot Record (MBR)
      Suspicious use of SetThreadContext
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:4948
    - - C:\Users\Admin\AppData\Local\Temp\0718i2vupW.exe
        
        "C:\Users\Admin\AppData\Local\Temp\0718i2vupW.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of SetWindowsHookEx
        
        PID:3508

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\0718i2vupW.exe

Filesize
228KB

MD5
4bde2fa501b271311668b79e08c3977e

SHA1
60517822d48cf2b560c2d4681c4e5685e29f9632

SHA256
73903815bf438131d3dee70fb8f7f757f1ae57deb7fddd802685fd14d95c33dd

SHA512
4a39144ed55e44228882b1d30e1d4b6ddc76cbc8037089fdd0e058ad79364a66d13d311827bf181907d3e29b84b6443349624e2d505d1c4d64cea2e48cd684c3

Download Submit
C:\Users\Admin\AppData\Local\Temp\Winject.exe

Filesize
156KB

MD5
5c71bf80b291452cff22524688d38297

SHA1
a10e2ee7d94b41c54149d3561166c37c1465e079

SHA256
9aa9e7fbf8b8d286c5c6f0571e08da319b5418b6a4f5565bb3aa7b879b26368b

SHA512
e12b07e9d08946222950e32acad1a81ec410132ed3baf9eecd2e940a0dc63acaa65a83875208eda0318b50a535b4579ae0650ea17ec05d11444460ac2d67b007

Download Submit
C:\Users\Admin\AppData\Local\Temp\Winject.exe

Filesize
128KB

MD5
c26d4096238dc3acb2f95da99f63f0dd

SHA1
5492852ee3673481ba369a771e0677ca88458235

SHA256
a5cc37592128ef8a3ed218eb2334b8fa3c0f315a6a08cec1801128709da09af4

SHA512
983367759200825b88062a75143dd94e4007bb65e3fd5409525e40483f745412af99a989e5ae7317d4c56b3c39bf4f9ab1cab0e59b23ff5e18ef2ad9b29ed8d8

Download Submit
memory/2228-2-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/2228-4-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/2228-22-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/3508-36-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3508-33-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3508-41-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3508-43-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4948-30-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4948-27-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4948-39-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download