isrstealer | a686af167b443bfc8e9bfd3332f349c0d85bb7f2daf83d081f549abc737e8fd5

Analysis

max time kernel
144s
max time network
120s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
11-08-2024 17:19

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General

Target

8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe
Size

1.2MB
MD5

8b43a72a90aa534dade4706e8b77f271
SHA1

5d08fa7ba457392acbf6f83ca44bc3f7e68961dc
SHA256

a686af167b443bfc8e9bfd3332f349c0d85bb7f2daf83d081f549abc737e8fd5
SHA512

744da373c99fedb0b5767bda3ee2682bc98bdc9ffc3d7e57d69b00a9af0ac2b76cec5e4a6636b2348068faf01c1062abbb40ab4b341155bfc10b1af99702bc56
SSDEEP

24576:3R3wdDxvbHRDYJ10U8lwtqr9RW4qA7YM5F5rW2g6tGEf7ZzL8g:BGbH2J10U8lwtUj1nhJgWf9zYg

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
behavioral2/memory/3308-50-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/3308-54-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/3308-57-0x0000000000400000-0x0000000000414000-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-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe

Executes dropped EXE 5 IoCs

pid	Process
4980	Setup.exe
3668	AutoShutdown.exe
5116	AutoShutdown.tmp
3076	Setup.exe
3308	Setup.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	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe
File opened for modification	\??\PhysicalDrive0	Setup.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 5000 set thread context of 1848	5000	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe	87
PID 4980 set thread context of 3076	4980	Setup.exe	95
PID 3076 set thread context of 3308	3076	Setup.exe	96

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 7 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	Setup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Setup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AutoShutdown.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Setup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AutoShutdown.tmp

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3308	Setup.exe
3308	Setup.exe
3308	Setup.exe
3308	Setup.exe
3308	Setup.exe
3308	Setup.exe
3308	Setup.exe
3308	Setup.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
5000	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe
1848	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe
4980	Setup.exe
3076	Setup.exe
3308	Setup.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 5000 wrote to memory of 1848	5000	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe	87
PID 5000 wrote to memory of 1848	5000	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe	87
PID 5000 wrote to memory of 1848	5000	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe	87
PID 5000 wrote to memory of 1848	5000	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe	87
PID 5000 wrote to memory of 1848	5000	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe	87
PID 5000 wrote to memory of 1848	5000	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe	87
PID 5000 wrote to memory of 1848	5000	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe	87
PID 5000 wrote to memory of 1848	5000	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe	87
PID 1848 wrote to memory of 4980	1848	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe	88
PID 1848 wrote to memory of 4980	1848	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe	88
PID 1848 wrote to memory of 4980	1848	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe	88
PID 1848 wrote to memory of 3668	1848	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe	89
PID 1848 wrote to memory of 3668	1848	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe	89
PID 1848 wrote to memory of 3668	1848	8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe	89
PID 3668 wrote to memory of 5116	3668	AutoShutdown.exe	90
PID 3668 wrote to memory of 5116	3668	AutoShutdown.exe	90
PID 3668 wrote to memory of 5116	3668	AutoShutdown.exe	90
PID 4980 wrote to memory of 3076	4980	Setup.exe	95
PID 4980 wrote to memory of 3076	4980	Setup.exe	95
PID 4980 wrote to memory of 3076	4980	Setup.exe	95
PID 4980 wrote to memory of 3076	4980	Setup.exe	95
PID 4980 wrote to memory of 3076	4980	Setup.exe	95
PID 4980 wrote to memory of 3076	4980	Setup.exe	95
PID 4980 wrote to memory of 3076	4980	Setup.exe	95
PID 4980 wrote to memory of 3076	4980	Setup.exe	95
PID 3076 wrote to memory of 3308	3076	Setup.exe	96
PID 3076 wrote to memory of 3308	3076	Setup.exe	96
PID 3076 wrote to memory of 3308	3076	Setup.exe	96
PID 3076 wrote to memory of 3308	3076	Setup.exe	96
PID 3076 wrote to memory of 3308	3076	Setup.exe	96
PID 3076 wrote to memory of 3308	3076	Setup.exe	96
PID 3076 wrote to memory of 3308	3076	Setup.exe	96
PID 3076 wrote to memory of 3308	3076	Setup.exe	96

C:\Users\Admin\AppData\Local\Temp\8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5000
- C:\Users\Admin\AppData\Local\Temp\8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\8b43a72a90aa534dade4706e8b77f271_JaffaCakes118.exe"
  2⤵
  - Checks computer location settings
  - Writes to the Master Boot Record (MBR)
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1848
- - C:\Users\Admin\AppData\Local\Temp\Setup.exe
    "C:\Users\Admin\AppData\Local\Temp\Setup.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4980
  - - C:\Users\Admin\AppData\Local\Temp\Setup.exe
      "C:\Users\Admin\AppData\Local\Temp\Setup.exe"
      4⤵
      Executes dropped EXE
      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:3076
    - - C:\Users\Admin\AppData\Local\Temp\Setup.exe
        
        "C:\Users\Admin\AppData\Local\Temp\Setup.exe"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of SetWindowsHookEx
        
        PID:3308
- - C:\Users\Admin\AppData\Local\Temp\AutoShutdown.exe
    "C:\Users\Admin\AppData\Local\Temp\AutoShutdown.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3668
  - - C:\Users\Admin\AppData\Local\Temp\is-7FTCK.tmp\AutoShutdown.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-7FTCK.tmp\AutoShutdown.tmp" /SL5="$B0164,619735,54272,C:\Users\Admin\AppData\Local\Temp\AutoShutdown.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:5116

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

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\AutoShutdown.exe

Filesize
849KB

MD5
c538ca1b9bd9edeb991e724dc0d49d29

SHA1
e8dbdb165c71bd7bd4b1dc550ea933218b087566

SHA256
c9c1f539ce03a947671c84ec82c12e283646cef51241a1f9f97d82446caf1c63

SHA512
aa94ba4ff8444993385ba27d6254ceb032c44bee6ddfb5c8828f678d556a8ffae4e385269a9feae177f5e01046d5a868f45758bdde6b2c07a16d75ca9b75c110

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

Filesize
236KB

MD5
11e3a7725ea87619eab1292aa24602ce

SHA1
883174081f523bec2e7c8acef081523da871f8f2

SHA256
44c2f6b3d12a68ccb86e49d358bf2a63fd531289687707097fbe79c1f5235c5b

SHA512
1ad0156d2f7666091f00272c2887a5f99ee05e164bbe548df825d6410a48d2b4f4fc6628911b104af796f1633cedad426686f86a81fb838cf0ef1511b6a28758

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-7FTCK.tmp\AutoShutdown.tmp

Filesize
688KB

MD5
c765336f0dcf4efdcc2101eed67cd30c

SHA1
fa0279f59738c5aa3b6b20106e109ccd77f895a7

SHA256
c5177fdc6031728e10141745cd69edbc91c92d14411a2dec6e8e8caa4f74ab28

SHA512
06a67ac37c20897967e2cad453793a6ef1c7804d4c578404f845daa88c859b15b0acb51642e6ad23ca6ba6549b02d5f6c98b1fa402004bdbf9d646abab7ec891

Download Submit
memory/1848-4-0x0000000000400000-0x000000000051C000-memory.dmp

Filesize
1.1MB

Download
memory/1848-2-0x0000000000400000-0x000000000051C000-memory.dmp

Filesize
1.1MB

Download
memory/1848-31-0x0000000000400000-0x000000000051C000-memory.dmp

Filesize
1.1MB

Download
memory/3076-47-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3076-52-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3076-45-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3308-54-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3308-50-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3308-57-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3668-32-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3668-29-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3668-59-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/5116-60-0x0000000000400000-0x00000000004BC000-memory.dmp

Filesize
752KB

Download