isrstealer | 0a7d70527905957f57ef2b03eedceb93a55dfc626e6eee86bf9b7b184af1a390

General

Target

e0b8ddf70d7ab115a8bfa5b49f285a5d.exe
Size

440KB
MD5

e0b8ddf70d7ab115a8bfa5b49f285a5d
SHA1

dd2df5d6282bf68a0f00192f4b5ddd4e4b3f9e8e
SHA256

0a7d70527905957f57ef2b03eedceb93a55dfc626e6eee86bf9b7b184af1a390
SHA512

7436833565f9e6f9ed6ab99e0bd09b23c573f1eda7841e960e1a7b03babc2d771eda2a8528dd3a85a57dd0f33fd6590a96421db4a052a04064e9cfbe9fcb47d3
SSDEEP

12288:hB8vmtsmWdN+GIs0Bp8gVh+7uiRNpk3GyE:em6Vd8LsiV/GyE

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
behavioral1/memory/2552-21-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2552-25-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2552-32-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2552-33-0x0000000000400000-0x0000000000414000-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	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2228 set thread context of 2328	2228	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	28
PID 2328 set thread context of 2552	2328	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	29

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
2552	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe
2552	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe
2552	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe
2552	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2228	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe
2328	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe
2552	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2228 wrote to memory of 2328	2228	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	28
PID 2228 wrote to memory of 2328	2228	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	28
PID 2228 wrote to memory of 2328	2228	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	28
PID 2228 wrote to memory of 2328	2228	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	28
PID 2228 wrote to memory of 2328	2228	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	28
PID 2228 wrote to memory of 2328	2228	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	28
PID 2228 wrote to memory of 2328	2228	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	28
PID 2228 wrote to memory of 2328	2228	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	28
PID 2228 wrote to memory of 2328	2228	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	28
PID 2328 wrote to memory of 2552	2328	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	29
PID 2328 wrote to memory of 2552	2328	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	29
PID 2328 wrote to memory of 2552	2328	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	29
PID 2328 wrote to memory of 2552	2328	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	29
PID 2328 wrote to memory of 2552	2328	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	29
PID 2328 wrote to memory of 2552	2328	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	29
PID 2328 wrote to memory of 2552	2328	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	29
PID 2328 wrote to memory of 2552	2328	e0b8ddf70d7ab115a8bfa5b49f285a5d.exe	29

C:\Users\Admin\AppData\Local\Temp\e0b8ddf70d7ab115a8bfa5b49f285a5d.exe
"C:\Users\Admin\AppData\Local\Temp\e0b8ddf70d7ab115a8bfa5b49f285a5d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2228
- C:\Users\Admin\AppData\Local\Temp\e0b8ddf70d7ab115a8bfa5b49f285a5d.exe
  "C:\Users\Admin\AppData\Local\Temp\e0b8ddf70d7ab115a8bfa5b49f285a5d.exe"
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2328
- - C:\Users\Admin\AppData\Local\Temp\e0b8ddf70d7ab115a8bfa5b49f285a5d.exe
    "C:\Users\Admin\AppData\Local\Temp\e0b8ddf70d7ab115a8bfa5b49f285a5d.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:2552

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/2328-26-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2328-4-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2328-6-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2328-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2328-12-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2328-14-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2328-2-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2552-17-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2552-21-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2552-25-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2552-19-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2552-32-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2552-33-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads