isrstealer | 18dc7547a582f181d55dfa08e285fcdfb10fc88b7969f03eb07393b0c3678f72

General

Target

9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe
Size

248KB
MD5

9a46c9dda90896bf7f62061fd9341480
SHA1

ed94e2262d5be6b1a1f0aa613bd6a9c55b87778c
SHA256

18dc7547a582f181d55dfa08e285fcdfb10fc88b7969f03eb07393b0c3678f72
SHA512

9eb81bfca5eefc5ad2a18bbe16c7b743f8871fc49617af822334b9ae369ada8bcf7cf062deb63f6610bb547df00cdd78dc829bed4f593bccef22b9ffc725c2b3
SSDEEP

3072:PwdB0U0AXo7zaQcFO70dLZ3hkoi6zgt6tLlSvOS70+pH43/EG:odB0U0AY7+WWLd6o/zgQtJ4OWu/EG

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/2912-25-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2912-21-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2912-33-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2912-37-0x0000000000400000-0x0000000000414000-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	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2120 set thread context of 2904	2120	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	30
PID 2904 set thread context of 2912	2904	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	31

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	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2912	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe
2912	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe
2912	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe
2912	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2120	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe
2904	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe
2912	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2120 wrote to memory of 2904	2120	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	30
PID 2120 wrote to memory of 2904	2120	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	30
PID 2120 wrote to memory of 2904	2120	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	30
PID 2120 wrote to memory of 2904	2120	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	30
PID 2120 wrote to memory of 2904	2120	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	30
PID 2120 wrote to memory of 2904	2120	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	30
PID 2120 wrote to memory of 2904	2120	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	30
PID 2120 wrote to memory of 2904	2120	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	30
PID 2120 wrote to memory of 2904	2120	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	30
PID 2904 wrote to memory of 2912	2904	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	31
PID 2904 wrote to memory of 2912	2904	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	31
PID 2904 wrote to memory of 2912	2904	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	31
PID 2904 wrote to memory of 2912	2904	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	31
PID 2904 wrote to memory of 2912	2904	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	31
PID 2904 wrote to memory of 2912	2904	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	31
PID 2904 wrote to memory of 2912	2904	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	31
PID 2904 wrote to memory of 2912	2904	9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe	31

C:\Users\Admin\AppData\Local\Temp\9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2120
- C:\Users\Admin\AppData\Local\Temp\9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\9a46c9dda90896bf7f62061fd9341480_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:2904
- - C:\Users\Admin\AppData\Local\Temp\9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\9a46c9dda90896bf7f62061fd9341480_JaffaCakes118.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:2912

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/2904-29-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2904-4-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2904-14-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2904-12-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2904-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2904-6-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2904-2-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2912-25-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2912-21-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2912-19-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2912-17-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2912-33-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2912-37-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads