isrstealer | f7462dc49468eb6a06eec809d98fead60d64be1e7e5a9b784977d8a32424a6c2

General

Target

93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe
Size

232KB
MD5

93e550a36dddf06a840abfa57fc0900a
SHA1

af58d5dce7bfe931c2b27de917cbf62af1153feb
SHA256

f7462dc49468eb6a06eec809d98fead60d64be1e7e5a9b784977d8a32424a6c2
SHA512

7a793039ed18f90f333d34137cab26b8d7feec40d1cc99c43d8dc864ea0a9fcec2784baddb4fa33f323f474e8743746625fdf021f329032ac509a342ac43d383
SSDEEP

3072:jd2QQU0AaP/NfFH98Woe/UcVKbn/GPHvLjfuot2K7pINPFzYJ+DBad:J2QQU0AeVFH9SsUwKK/GSpyTad

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
behavioral2/memory/464-7-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/464-9-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/464-14-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/464-16-0x0000000000400000-0x0000000000414000-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	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4864 set thread context of 2932	4864	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	91
PID 2932 set thread context of 464	2932	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	92

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	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
464	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe
464	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe
464	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe
464	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe
464	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe
464	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe
464	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe
464	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4864	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe
2932	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe
464	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4864 wrote to memory of 2932	4864	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	91
PID 4864 wrote to memory of 2932	4864	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	91
PID 4864 wrote to memory of 2932	4864	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	91
PID 4864 wrote to memory of 2932	4864	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	91
PID 4864 wrote to memory of 2932	4864	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	91
PID 4864 wrote to memory of 2932	4864	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	91
PID 4864 wrote to memory of 2932	4864	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	91
PID 4864 wrote to memory of 2932	4864	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	91
PID 2932 wrote to memory of 464	2932	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	92
PID 2932 wrote to memory of 464	2932	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	92
PID 2932 wrote to memory of 464	2932	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	92
PID 2932 wrote to memory of 464	2932	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	92
PID 2932 wrote to memory of 464	2932	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	92
PID 2932 wrote to memory of 464	2932	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	92
PID 2932 wrote to memory of 464	2932	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	92
PID 2932 wrote to memory of 464	2932	93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe	92

C:\Users\Admin\AppData\Local\Temp\93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4864
- C:\Users\Admin\AppData\Local\Temp\93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\93e550a36dddf06a840abfa57fc0900a_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:2932
- - C:\Users\Admin\AppData\Local\Temp\93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\93e550a36dddf06a840abfa57fc0900a_JaffaCakes118.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:464

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/464-7-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/464-9-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/464-14-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/464-16-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2932-2-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2932-4-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2932-11-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads