isrstealer | 819d6e3c7e9c97aca0b962f9d43ea42ce1a71a357bce39640cf7a70ed6630b2b

General

Target

3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe
Size

232KB
MD5

3d6ccea510c75c31d5166bcbc631cdc5
SHA1

12598a6f18f98f2d764026c0a44a1d1d24fcc0a3
SHA256

819d6e3c7e9c97aca0b962f9d43ea42ce1a71a357bce39640cf7a70ed6630b2b
SHA512

a5c514f91a1c7a7afc41ca622aed8d3f49f9618bcec368a27cb2ac4d8d942b8e373344278702818328ff43a1d3b01a151ba782543b710ad1c1b304f2497623da
SSDEEP

3072:q/gYMyMWhgRuETGycP/y4kJHVrk9oKG6CgI2zN+oq8eAhef0PSkHoWf4ECe:qtMzRuW9ms1rk9oKGDIN+o5dhIkI3EC

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 4 IoCs

resource	yara_rule
behavioral2/memory/4952-8-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/4952-10-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/4952-15-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/4952-17-0x0000000000400000-0x0000000000414000-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	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1904 set thread context of 3532	1904	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	86
PID 3532 set thread context of 4952	3532	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	87

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4952	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe
4952	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe
4952	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe
4952	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe
4952	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe
4952	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe
4952	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe
4952	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1904	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe
3532	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe
4952	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1904 wrote to memory of 3532	1904	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	86
PID 1904 wrote to memory of 3532	1904	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	86
PID 1904 wrote to memory of 3532	1904	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	86
PID 1904 wrote to memory of 3532	1904	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	86
PID 1904 wrote to memory of 3532	1904	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	86
PID 1904 wrote to memory of 3532	1904	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	86
PID 1904 wrote to memory of 3532	1904	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	86
PID 1904 wrote to memory of 3532	1904	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	86
PID 3532 wrote to memory of 4952	3532	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	87
PID 3532 wrote to memory of 4952	3532	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	87
PID 3532 wrote to memory of 4952	3532	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	87
PID 3532 wrote to memory of 4952	3532	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	87
PID 3532 wrote to memory of 4952	3532	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	87
PID 3532 wrote to memory of 4952	3532	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	87
PID 3532 wrote to memory of 4952	3532	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	87
PID 3532 wrote to memory of 4952	3532	3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe	87

C:\Users\Admin\AppData\Local\Temp\3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1904
- C:\Users\Admin\AppData\Local\Temp\3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe"
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3532
- - C:\Users\Admin\AppData\Local\Temp\3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\3d6ccea510c75c31d5166bcbc631cdc5_JaffaCakes118.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:4952

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/3532-4-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3532-12-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3532-7-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3532-2-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4952-8-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4952-10-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4952-15-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4952-17-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads