isrstealer | 35e6db625e5143f7506e27153776623aa36e32bd8df2c8efabf053aa7aff3d1b

Analysis

max time kernel
117s
max time network
119s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
29-01-2025 13:25

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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 discovery 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 3 IoCs

resource	yara_rule
behavioral3/memory/2644-66-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral3/memory/2644-63-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral3/memory/2644-74-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Isrstealer family
isrstealer

Executes dropped EXE 4 IoCs

pid	Process
2948	Winject.exe
2328	0718i2vupW.exe
2772	0718i2vupW.exe
2644	0718i2vupW.exe

Loads dropped DLL 6 IoCs

pid	Process
332	WinJect.exe
332	WinJect.exe
332	WinJect.exe
332	WinJect.exe
2328	0718i2vupW.exe
2772	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 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

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

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2096 set thread context of 332	2096	WinJect.exe	31
PID 2328 set thread context of 2772	2328	0718i2vupW.exe	34
PID 2772 set thread context of 2644	2772	0718i2vupW.exe	35

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 6 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	0718i2vupW.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0718i2vupW.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WinJect.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WinJect.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Winject.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0718i2vupW.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2644	0718i2vupW.exe
2644	0718i2vupW.exe
2644	0718i2vupW.exe
2644	0718i2vupW.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2948	Winject.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
2096	WinJect.exe
332	WinJect.exe
2328	0718i2vupW.exe
2772	0718i2vupW.exe
2644	0718i2vupW.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 2096 wrote to memory of 332	2096	WinJect.exe	31
PID 2096 wrote to memory of 332	2096	WinJect.exe	31
PID 2096 wrote to memory of 332	2096	WinJect.exe	31
PID 2096 wrote to memory of 332	2096	WinJect.exe	31
PID 2096 wrote to memory of 332	2096	WinJect.exe	31
PID 2096 wrote to memory of 332	2096	WinJect.exe	31
PID 2096 wrote to memory of 332	2096	WinJect.exe	31
PID 2096 wrote to memory of 332	2096	WinJect.exe	31
PID 2096 wrote to memory of 332	2096	WinJect.exe	31
PID 332 wrote to memory of 2948	332	WinJect.exe	32
PID 332 wrote to memory of 2948	332	WinJect.exe	32
PID 332 wrote to memory of 2948	332	WinJect.exe	32
PID 332 wrote to memory of 2948	332	WinJect.exe	32
PID 332 wrote to memory of 2328	332	WinJect.exe	33
PID 332 wrote to memory of 2328	332	WinJect.exe	33
PID 332 wrote to memory of 2328	332	WinJect.exe	33
PID 332 wrote to memory of 2328	332	WinJect.exe	33
PID 2328 wrote to memory of 2772	2328	0718i2vupW.exe	34
PID 2328 wrote to memory of 2772	2328	0718i2vupW.exe	34
PID 2328 wrote to memory of 2772	2328	0718i2vupW.exe	34
PID 2328 wrote to memory of 2772	2328	0718i2vupW.exe	34
PID 2328 wrote to memory of 2772	2328	0718i2vupW.exe	34
PID 2328 wrote to memory of 2772	2328	0718i2vupW.exe	34
PID 2328 wrote to memory of 2772	2328	0718i2vupW.exe	34
PID 2328 wrote to memory of 2772	2328	0718i2vupW.exe	34
PID 2328 wrote to memory of 2772	2328	0718i2vupW.exe	34
PID 2772 wrote to memory of 2644	2772	0718i2vupW.exe	35
PID 2772 wrote to memory of 2644	2772	0718i2vupW.exe	35
PID 2772 wrote to memory of 2644	2772	0718i2vupW.exe	35
PID 2772 wrote to memory of 2644	2772	0718i2vupW.exe	35
PID 2772 wrote to memory of 2644	2772	0718i2vupW.exe	35
PID 2772 wrote to memory of 2644	2772	0718i2vupW.exe	35
PID 2772 wrote to memory of 2644	2772	0718i2vupW.exe	35
PID 2772 wrote to memory of 2644	2772	0718i2vupW.exe	35

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
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2096
- C:\Users\Admin\AppData\Local\Temp\Battlefield 3 Aimbot\WinJect.exe
  "C:\Users\Admin\AppData\Local\Temp\Battlefield 3 Aimbot\WinJect.exe"
  2⤵
  - Loads dropped DLL
  - Writes to the Master Boot Record (MBR)
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:332
- - C:\Users\Admin\AppData\Local\Temp\Winject.exe
    "C:\Users\Admin\AppData\Local\Temp\Winject.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: GetForegroundWindowSpam
    PID:2948
- - C:\Users\Admin\AppData\Local\Temp\0718i2vupW.exe
    "C:\Users\Admin\AppData\Local\Temp\0718i2vupW.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2328
  - - C:\Users\Admin\AppData\Local\Temp\0718i2vupW.exe
      "C:\Users\Admin\AppData\Local\Temp\0718i2vupW.exe"
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Writes to the Master Boot Record (MBR)
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2772
    - - C:\Users\Admin\AppData\Local\Temp\0718i2vupW.exe
        
        "C:\Users\Admin\AppData\Local\Temp\0718i2vupW.exe"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of SetWindowsHookEx
        
        PID:2644

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

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

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

Filesize
228KB

MD5
4bde2fa501b271311668b79e08c3977e

SHA1
60517822d48cf2b560c2d4681c4e5685e29f9632

SHA256
73903815bf438131d3dee70fb8f7f757f1ae57deb7fddd802685fd14d95c33dd

SHA512
4a39144ed55e44228882b1d30e1d4b6ddc76cbc8037089fdd0e058ad79364a66d13d311827bf181907d3e29b84b6443349624e2d505d1c4d64cea2e48cd684c3

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

Filesize
156KB

MD5
5c71bf80b291452cff22524688d38297

SHA1
a10e2ee7d94b41c54149d3561166c37c1465e079

SHA256
9aa9e7fbf8b8d286c5c6f0571e08da319b5418b6a4f5565bb3aa7b879b26368b

SHA512
e12b07e9d08946222950e32acad1a81ec410132ed3baf9eecd2e940a0dc63acaa65a83875208eda0318b50a535b4579ae0650ea17ec05d11444460ac2d67b007

Download Submit
memory/332-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/332-6-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/332-14-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/332-12-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/332-4-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/332-37-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/332-2-0x0000000000400000-0x000000000046B000-memory.dmp

Filesize
428KB

Download
memory/2644-59-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2644-74-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2644-63-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2644-61-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2644-66-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2772-52-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2772-71-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2772-42-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2772-44-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2772-46-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2772-55-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download