isrstealer | 8c3b961b4f232f5ab2594f14e852467275271b63f28d76dc82ae68144d27e9d7

General

Target

12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe
Size

252KB
MD5

12a0507a3fa1830c02af1155df5b17d4
SHA1

519b62b20ea54afb80db97d647d4f3450f5ff0b1
SHA256

8c3b961b4f232f5ab2594f14e852467275271b63f28d76dc82ae68144d27e9d7
SHA512

56ad8c31cd38b716a9468349b29a34231c806e8cb45979b49f4e6ea2037fc0a8e905ae49d3b32b989618ac16b668c424f916f53aba18db1fc5efc95f9952d5d6
SSDEEP

6144:5nBp3Xn2AzbbbbbbbbbbbbbgW1hggvPTbbbbbbbbbbbbbbbbbbbbKPDFOlZeVtpU:/pXzbbbbbbbbbbbbbgW1hgg3Tbbbbbbs

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 3 IoCs

resource	yara_rule
behavioral1/memory/2588-22-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2588-32-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2588-35-0x0000000000400000-0x0000000000414000-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	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2384 set thread context of 804	2384	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	28
PID 804 set thread context of 2588	804	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	29

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2588	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe
2588	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe
2588	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe
2588	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2384	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe
804	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe
2588	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2384 wrote to memory of 804	2384	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	28
PID 2384 wrote to memory of 804	2384	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	28
PID 2384 wrote to memory of 804	2384	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	28
PID 2384 wrote to memory of 804	2384	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	28
PID 2384 wrote to memory of 804	2384	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	28
PID 2384 wrote to memory of 804	2384	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	28
PID 2384 wrote to memory of 804	2384	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	28
PID 2384 wrote to memory of 804	2384	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	28
PID 2384 wrote to memory of 804	2384	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	28
PID 804 wrote to memory of 2588	804	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	29
PID 804 wrote to memory of 2588	804	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	29
PID 804 wrote to memory of 2588	804	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	29
PID 804 wrote to memory of 2588	804	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	29
PID 804 wrote to memory of 2588	804	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	29
PID 804 wrote to memory of 2588	804	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	29
PID 804 wrote to memory of 2588	804	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	29
PID 804 wrote to memory of 2588	804	12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe	29

C:\Users\Admin\AppData\Local\Temp\12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2384
- C:\Users\Admin\AppData\Local\Temp\12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe"
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:804
- - C:\Users\Admin\AppData\Local\Temp\12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\12a0507a3fa1830c02af1155df5b17d4_JaffaCakes118.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:2588

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 Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/804-4-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/804-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/804-14-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/804-6-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/804-17-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/804-2-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/804-12-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/804-31-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2588-22-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2588-18-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2588-20-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2588-32-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2588-35-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads