isrstealer | 53ca5a22764b45b798aa3dd9b9415c4fea4d228b7c2de88b72228856b47b15bc

General

Target

JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe
Size

244KB
MD5

6df6c34c33aa71eb334426098c60cc55
SHA1

a2beec11468184d1fbd21e65154806d8138a5a7b
SHA256

53ca5a22764b45b798aa3dd9b9415c4fea4d228b7c2de88b72228856b47b15bc
SHA512

e62a45a9c20d6b53416f192db165e9a85a23e3bf4f6dd62ee10f04ed4fd4309edfc1577f7de649bb13dceb6a09218c8a800f64293071e47326634e0ccceb0a2f
SSDEEP

6144:VwQqiU5iSphP90jEq6yrteSZfcgm3Za9R:V2pt9062teFZ3Za9R

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/1420-7-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/1420-9-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/1420-14-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Isrstealer 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 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 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	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4540 set thread context of 556	4540	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	93
PID 556 set thread context of 1420	556	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	94

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 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	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1420	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe
1420	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe
1420	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe
1420	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe
1420	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe
1420	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe
1420	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe
1420	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4540	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe
556	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe
1420	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4540 wrote to memory of 556	4540	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	93
PID 4540 wrote to memory of 556	4540	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	93
PID 4540 wrote to memory of 556	4540	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	93
PID 4540 wrote to memory of 556	4540	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	93
PID 4540 wrote to memory of 556	4540	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	93
PID 4540 wrote to memory of 556	4540	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	93
PID 4540 wrote to memory of 556	4540	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	93
PID 4540 wrote to memory of 556	4540	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	93
PID 556 wrote to memory of 1420	556	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	94
PID 556 wrote to memory of 1420	556	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	94
PID 556 wrote to memory of 1420	556	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	94
PID 556 wrote to memory of 1420	556	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	94
PID 556 wrote to memory of 1420	556	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	94
PID 556 wrote to memory of 1420	556	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	94
PID 556 wrote to memory of 1420	556	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	94
PID 556 wrote to memory of 1420	556	JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe	94

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4540
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.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:556
- - C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6df6c34c33aa71eb334426098c60cc55.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:1420

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

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

System Information Discovery

1

T1082

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/556-2-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/556-4-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/556-11-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1420-7-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1420-9-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1420-14-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads