isrstealer | e07918d890c84920b2c25c01bbd6e657b360a6273225220d90e7ad8914030836

General

Target

a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe
Size

332KB
MD5

a96eba1bb6d8f4a75e515ba5fc4d22ee
SHA1

e342bad20ae1033e62ab00f1521c9e64b4759a0d
SHA256

e07918d890c84920b2c25c01bbd6e657b360a6273225220d90e7ad8914030836
SHA512

1d08357c80328ed917a78223872ab7ffdf60cb8b4698f59ced12273dd6bc34abb6e83fafe150df0ad5257d31e5da26f7c86183d0f4cd2f3331b290dfa12a22a9
SSDEEP

6144:qcZ2x7wpsMF2uqQ0wxD+i5LF9K4KGZjncRhKuu2NxcO0/:G2wQLxDNZFRZQKuuED0

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/4356-7-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/4356-9-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/4356-14-0x0000000000400000-0x0000000000414000-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	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1260 set thread context of 1588	1260	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	89
PID 1588 set thread context of 4356	1588	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	90

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	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4356	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe
4356	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe
4356	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe
4356	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe
4356	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe
4356	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe
4356	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe
4356	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1260	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe
1588	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe
4356	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1260 wrote to memory of 1588	1260	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	89
PID 1260 wrote to memory of 1588	1260	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	89
PID 1260 wrote to memory of 1588	1260	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	89
PID 1260 wrote to memory of 1588	1260	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	89
PID 1260 wrote to memory of 1588	1260	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	89
PID 1260 wrote to memory of 1588	1260	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	89
PID 1260 wrote to memory of 1588	1260	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	89
PID 1260 wrote to memory of 1588	1260	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	89
PID 1588 wrote to memory of 4356	1588	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	90
PID 1588 wrote to memory of 4356	1588	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	90
PID 1588 wrote to memory of 4356	1588	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	90
PID 1588 wrote to memory of 4356	1588	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	90
PID 1588 wrote to memory of 4356	1588	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	90
PID 1588 wrote to memory of 4356	1588	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	90
PID 1588 wrote to memory of 4356	1588	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	90
PID 1588 wrote to memory of 4356	1588	a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe	90

C:\Users\Admin\AppData\Local\Temp\a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1260
- C:\Users\Admin\AppData\Local\Temp\a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\a96eba1bb6d8f4a75e515ba5fc4d22ee_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:1588
- - C:\Users\Admin\AppData\Local\Temp\a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\a96eba1bb6d8f4a75e515ba5fc4d22ee_JaffaCakes118.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:4356

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

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/1588-2-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1588-4-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1588-11-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4356-7-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4356-9-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4356-14-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads