isrstealer | 4cef8338763cdf036a181126edae3c8ea55655d7ad40cade2c0f6a48108f08fb

General

Target

89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe
Size

232KB
MD5

89e2225909a659294ab7c5fc631f05f8
SHA1

0e260455b8c8ada170f4963312ef1112a603a93c
SHA256

4cef8338763cdf036a181126edae3c8ea55655d7ad40cade2c0f6a48108f08fb
SHA512

a91fa638d604a3b87a74ab146b365ced7e6de57a013198b5e6e28b31bbeb7f34467f02d7684150e8a8118405ae6866750d03d2b7b63f1d3895695ec8587e4c4e
SSDEEP

6144:3RNzxkqq3Mc7R+AvyZKEuq934aLG/TI+++:Oh+Avyvuq9o3

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 4 IoCs

resource	yara_rule
behavioral1/memory/2880-26-0x0000000000400000-0x0000000000412000-memory.dmp	family_isrstealer
behavioral1/memory/2880-31-0x0000000000400000-0x0000000000412000-memory.dmp	family_isrstealer
behavioral1/memory/2880-22-0x0000000000400000-0x0000000000412000-memory.dmp	family_isrstealer
behavioral1/memory/2880-34-0x0000000000400000-0x0000000000412000-memory.dmp	family_isrstealer

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 1 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	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3000 set thread context of 3048	3000	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	30
PID 3048 set thread context of 2880	3048	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	31

System Location Discovery: System Language Discovery 1 TTPs 3 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	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
3000	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe
3048	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe
2880	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3000 wrote to memory of 3048	3000	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	30
PID 3000 wrote to memory of 3048	3000	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	30
PID 3000 wrote to memory of 3048	3000	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	30
PID 3000 wrote to memory of 3048	3000	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	30
PID 3000 wrote to memory of 3048	3000	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	30
PID 3000 wrote to memory of 3048	3000	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	30
PID 3000 wrote to memory of 3048	3000	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	30
PID 3000 wrote to memory of 3048	3000	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	30
PID 3000 wrote to memory of 3048	3000	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	30
PID 3048 wrote to memory of 2880	3048	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	31
PID 3048 wrote to memory of 2880	3048	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	31
PID 3048 wrote to memory of 2880	3048	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	31
PID 3048 wrote to memory of 2880	3048	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	31
PID 3048 wrote to memory of 2880	3048	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	31
PID 3048 wrote to memory of 2880	3048	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	31
PID 3048 wrote to memory of 2880	3048	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	31
PID 3048 wrote to memory of 2880	3048	89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe	31

C:\Users\Admin\AppData\Local\Temp\89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3000
- C:\Users\Admin\AppData\Local\Temp\89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe"
  2⤵
  - 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:3048
- - C:\Users\Admin\AppData\Local\Temp\89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\89e2225909a659294ab7c5fc631f05f8_JaffaCakes118.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:2880

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/2880-22-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2880-26-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2880-31-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2880-20-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2880-18-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2880-34-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3048-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3048-12-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/3048-6-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/3048-5-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/3048-15-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/3048-32-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/3048-2-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads