isrstealer | 460ab58bc9a6f47d54403e74511e24f2e499081fb3af6ba9b92ddc337cc8feaa

Analysis

max time kernel
148s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25/01/2025, 07:36

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe
Size

1.6MB
MD5

2977a60c2152fd24dc5aac6e88de8049
SHA1

8715bb5732eed4ec20eed1dd31d731197763e4fb
SHA256

460ab58bc9a6f47d54403e74511e24f2e499081fb3af6ba9b92ddc337cc8feaa
SHA512

fc47fe700c0e4ae8d72be6f2925889c74e504ae60915007c3753311f08067f88bc08e15591cfd535948a52c25d208cd605c20d29b9ec16dde7d45242da5611b3
SSDEEP

24576:2sR3lMiam9l7rdJczfYx3wH7JnrqKsscuq7N9CgexI9SQ//ZKpvcvoXXK8FzAMif:2sh1fazfi3Khrc37zV0nK8FzAp+nW

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 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023c94-11.dat	family_isrstealer

Isrstealer 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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe

Executes dropped EXE 5 IoCs

pid	Process
5036	Server.exe
3016	LOL.exe
64	718i.exe
3932	718i.exe
4860	718i.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	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe
File opened for modification	\??\PhysicalDrive0	718i.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 404 set thread context of 4080	404	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	82
PID 64 set thread context of 3932	64	718i.exe	90
PID 3932 set thread context of 4860	3932	718i.exe	91

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	718i.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	718i.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	LOL.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	718i.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
5036	Server.exe
5036	Server.exe
5036	Server.exe
5036	Server.exe
5036	Server.exe
5036	Server.exe
5036	Server.exe
5036	Server.exe

Suspicious use of SetWindowsHookEx 7 IoCs

pid	Process
404	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe
4080	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe
5036	Server.exe
3016	LOL.exe
64	718i.exe
3932	718i.exe
4860	718i.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 404 wrote to memory of 4080	404	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	82
PID 404 wrote to memory of 4080	404	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	82
PID 404 wrote to memory of 4080	404	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	82
PID 404 wrote to memory of 4080	404	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	82
PID 404 wrote to memory of 4080	404	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	82
PID 404 wrote to memory of 4080	404	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	82
PID 404 wrote to memory of 4080	404	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	82
PID 404 wrote to memory of 4080	404	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	82
PID 4080 wrote to memory of 5036	4080	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	83
PID 4080 wrote to memory of 5036	4080	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	83
PID 4080 wrote to memory of 5036	4080	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	83
PID 4080 wrote to memory of 3016	4080	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	84
PID 4080 wrote to memory of 3016	4080	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	84
PID 4080 wrote to memory of 3016	4080	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	84
PID 4080 wrote to memory of 64	4080	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	85
PID 4080 wrote to memory of 64	4080	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	85
PID 4080 wrote to memory of 64	4080	JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe	85
PID 64 wrote to memory of 3932	64	718i.exe	90
PID 64 wrote to memory of 3932	64	718i.exe	90
PID 64 wrote to memory of 3932	64	718i.exe	90
PID 64 wrote to memory of 3932	64	718i.exe	90
PID 64 wrote to memory of 3932	64	718i.exe	90
PID 64 wrote to memory of 3932	64	718i.exe	90
PID 64 wrote to memory of 3932	64	718i.exe	90
PID 64 wrote to memory of 3932	64	718i.exe	90
PID 3932 wrote to memory of 4860	3932	718i.exe	91
PID 3932 wrote to memory of 4860	3932	718i.exe	91
PID 3932 wrote to memory of 4860	3932	718i.exe	91
PID 3932 wrote to memory of 4860	3932	718i.exe	91
PID 3932 wrote to memory of 4860	3932	718i.exe	91
PID 3932 wrote to memory of 4860	3932	718i.exe	91
PID 3932 wrote to memory of 4860	3932	718i.exe	91
PID 3932 wrote to memory of 4860	3932	718i.exe	91

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:404
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2977a60c2152fd24dc5aac6e88de8049.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:4080
- - C:\Users\Admin\AppData\Local\Temp\Server.exe
    "C:\Users\Admin\AppData\Local\Temp\Server.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:5036
- - C:\Users\Admin\AppData\Local\Temp\LOL.exe
    "C:\Users\Admin\AppData\Local\Temp\LOL.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:3016
- - C:\Users\Admin\AppData\Local\Temp\718i.exe
    "C:\Users\Admin\AppData\Local\Temp\718i.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:64
  - - C:\Users\Admin\AppData\Local\Temp\718i.exe
      "C:\Users\Admin\AppData\Local\Temp\718i.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:3932
    - - C:\Users\Admin\AppData\Local\Temp\718i.exe
        
        "C:\Users\Admin\AppData\Local\Temp\718i.exe"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:4860

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

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\718i.exe

Filesize
748KB

MD5
4ad5c92226d68166345f7c93029e9804

SHA1
f75e9d3b9008471738b50dd25bdbb2ac1852ea9f

SHA256
2ce05c615ec9e68e4b0ea851a6e13a607ce388a1a50e2b204309fbfec9caee17

SHA512
2558b48c4dc557f0561b331b6f9881c48d3d9873d464a8eaf24fff55b8f21ce5d9c466b83cbdd1e23e601908dbabfe524d054bf73d709621bd8df300b36b271b

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

Filesize
584KB

MD5
faeba776a31577433922a73082aaa37b

SHA1
a7b0030ddb9b3ae2c7175025d4818f9b2a751144

SHA256
9ea32a5cc6884ca0f02074fc2033f41c32bfeee0ab3609a40dbb3ec29cae4c4f

SHA512
2162e2e01842b999214f5a507361655e9e01fc793352be19c3d0d726697e2a028bd632774ecfb1ef39d362c9e78bc732477af64c174fbf24f16120de59483d29

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

Filesize
76KB

MD5
1c8edc14b76f5b9783e4f62bef8293d9

SHA1
a990ea76e858bcdbfbaeb3c6c607a1d2b37c46d9

SHA256
253f790773a69e4ddfa003332a96161bbadc2880bcf574c99e9f4e77a3db15d1

SHA512
c00b55b018d4a75fb744bc1a5b942632300a2e73501481a0b6a34d84e4ecf0eea9a3f9c941dabfdbe709733f79e1a7af015866bd09686be5fbf5a85d708d8dc0

Download Submit
memory/3932-51-0x0000000000400000-0x000000000049E000-memory.dmp

Filesize
632KB

Download
memory/3932-49-0x0000000000400000-0x000000000049E000-memory.dmp

Filesize
632KB

Download
memory/3932-57-0x0000000000400000-0x000000000049E000-memory.dmp

Filesize
632KB

Download
memory/4080-2-0x0000000000400000-0x000000000056C000-memory.dmp

Filesize
1.4MB

Download
memory/4080-4-0x0000000000400000-0x000000000056C000-memory.dmp

Filesize
1.4MB

Download
memory/4080-48-0x0000000000400000-0x000000000056C000-memory.dmp

Filesize
1.4MB

Download
memory/4860-54-0x0000000000400000-0x0000000000492000-memory.dmp

Filesize
584KB

Download
memory/4860-56-0x0000000000400000-0x0000000000492000-memory.dmp

Filesize
584KB

Download
memory/4860-61-0x0000000000400000-0x0000000000492000-memory.dmp

Filesize
584KB

Download