isrstealer | 55a366b624cd2eba7cdae14fe85125c5f8202577acb2f32c975c15809f803d59

General

Target

4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe
Size

232KB
MD5

4dde8137d66301741d8033939cd6e392
SHA1

c38a250eb78c36f42a1a4cff587cf18e11f40925
SHA256

55a366b624cd2eba7cdae14fe85125c5f8202577acb2f32c975c15809f803d59
SHA512

3fbce495817c86f5ab42d5238df61a03e25a2ae0e97e8bb8e37fd2a64a0536090e7fb1ef37b0de4914e51af8f445a3b5a4fbf015811c4f2fa427e0c1269011a9
SSDEEP

3072:7/gYMyMWhgRuRxiIQj2AUhAqIgnDPvsa7F/ejhO6bwpoSIDo:7tMzRu6IQ/Uhp5Pvsapedgq

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 5 IoCs

resource	yara_rule
behavioral1/memory/2416-26-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2416-21-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2416-33-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2416-34-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2416-36-0x0000000000400000-0x0000000000414000-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	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3032 set thread context of 1996	3032	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	30
PID 1996 set thread context of 2416	1996	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	31

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2416	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe
2416	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe
2416	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe
2416	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
3032	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe
1996	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe
2416	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3032 wrote to memory of 1996	3032	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	30
PID 3032 wrote to memory of 1996	3032	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	30
PID 3032 wrote to memory of 1996	3032	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	30
PID 3032 wrote to memory of 1996	3032	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	30
PID 3032 wrote to memory of 1996	3032	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	30
PID 3032 wrote to memory of 1996	3032	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	30
PID 3032 wrote to memory of 1996	3032	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	30
PID 3032 wrote to memory of 1996	3032	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	30
PID 3032 wrote to memory of 1996	3032	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	30
PID 1996 wrote to memory of 2416	1996	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	31
PID 1996 wrote to memory of 2416	1996	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	31
PID 1996 wrote to memory of 2416	1996	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	31
PID 1996 wrote to memory of 2416	1996	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	31
PID 1996 wrote to memory of 2416	1996	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	31
PID 1996 wrote to memory of 2416	1996	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	31
PID 1996 wrote to memory of 2416	1996	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	31
PID 1996 wrote to memory of 2416	1996	4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe	31

C:\Users\Admin\AppData\Local\Temp\4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3032
- C:\Users\Admin\AppData\Local\Temp\4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe"
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1996
- - C:\Users\Admin\AppData\Local\Temp\4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\4dde8137d66301741d8033939cd6e392_JaffaCakes118.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:2416

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/1996-23-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1996-2-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1996-12-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1996-14-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1996-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1996-4-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1996-6-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1996-29-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2416-21-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2416-19-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2416-17-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2416-26-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2416-33-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2416-34-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2416-36-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads