isrstealer | 622f6d37e73da72ea2d39f77099ee466e5979e47e1c55c0062855abae923f121

General

Target

09d716d57edc76d03136a0c475126554.exe
Size

312KB
MD5

09d716d57edc76d03136a0c475126554
SHA1

cb92a0c2a030ab46da68688dc257f3635b8f8783
SHA256

622f6d37e73da72ea2d39f77099ee466e5979e47e1c55c0062855abae923f121
SHA512

7ea2e93a807f417307f29a5b552bfd53426206cc8712513c7e4e96d3d2501a75a4c42496d09560b10f6abfdace0e5fae3a106df828a2e691bc43fed86e58ae46
SSDEEP

6144:RLa94GN7fiIEAeLHJx01zfs/RjX2cDEuNRxBxCH8e+nHZJlH9V/Eh5zsDjX25hGq:RW94GN7fiIEAeLHJx0VoVsu9CceOJlDe

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/2752-43-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2752-50-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2752-39-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2752-51-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2752-53-0x0000000000400000-0x0000000000414000-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 2 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	09d716d57edc76d03136a0c475126554.exe
File opened for modification	\??\PhysicalDrive0	09d716d57edc76d03136a0c475126554.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1272 set thread context of 2984	1272	09d716d57edc76d03136a0c475126554.exe	14
PID 2984 set thread context of 848	2984	09d716d57edc76d03136a0c475126554.exe	31
PID 848 set thread context of 2752	848	09d716d57edc76d03136a0c475126554.exe	30

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
2752	09d716d57edc76d03136a0c475126554.exe
2752	09d716d57edc76d03136a0c475126554.exe
2752	09d716d57edc76d03136a0c475126554.exe
2752	09d716d57edc76d03136a0c475126554.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
1272	09d716d57edc76d03136a0c475126554.exe
2984	09d716d57edc76d03136a0c475126554.exe
848	09d716d57edc76d03136a0c475126554.exe
2752	09d716d57edc76d03136a0c475126554.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1272 wrote to memory of 2984	1272	09d716d57edc76d03136a0c475126554.exe	14
PID 1272 wrote to memory of 2984	1272	09d716d57edc76d03136a0c475126554.exe	14
PID 1272 wrote to memory of 2984	1272	09d716d57edc76d03136a0c475126554.exe	14
PID 1272 wrote to memory of 2984	1272	09d716d57edc76d03136a0c475126554.exe	14
PID 1272 wrote to memory of 2984	1272	09d716d57edc76d03136a0c475126554.exe	14
PID 1272 wrote to memory of 2984	1272	09d716d57edc76d03136a0c475126554.exe	14
PID 1272 wrote to memory of 2984	1272	09d716d57edc76d03136a0c475126554.exe	14
PID 1272 wrote to memory of 2984	1272	09d716d57edc76d03136a0c475126554.exe	14
PID 1272 wrote to memory of 2984	1272	09d716d57edc76d03136a0c475126554.exe	14
PID 2984 wrote to memory of 848	2984	09d716d57edc76d03136a0c475126554.exe	31
PID 2984 wrote to memory of 848	2984	09d716d57edc76d03136a0c475126554.exe	31
PID 2984 wrote to memory of 848	2984	09d716d57edc76d03136a0c475126554.exe	31
PID 2984 wrote to memory of 848	2984	09d716d57edc76d03136a0c475126554.exe	31
PID 2984 wrote to memory of 848	2984	09d716d57edc76d03136a0c475126554.exe	31
PID 2984 wrote to memory of 848	2984	09d716d57edc76d03136a0c475126554.exe	31
PID 2984 wrote to memory of 848	2984	09d716d57edc76d03136a0c475126554.exe	31
PID 2984 wrote to memory of 848	2984	09d716d57edc76d03136a0c475126554.exe	31
PID 2984 wrote to memory of 848	2984	09d716d57edc76d03136a0c475126554.exe	31
PID 848 wrote to memory of 2752	848	09d716d57edc76d03136a0c475126554.exe	30
PID 848 wrote to memory of 2752	848	09d716d57edc76d03136a0c475126554.exe	30
PID 848 wrote to memory of 2752	848	09d716d57edc76d03136a0c475126554.exe	30
PID 848 wrote to memory of 2752	848	09d716d57edc76d03136a0c475126554.exe	30
PID 848 wrote to memory of 2752	848	09d716d57edc76d03136a0c475126554.exe	30
PID 848 wrote to memory of 2752	848	09d716d57edc76d03136a0c475126554.exe	30
PID 848 wrote to memory of 2752	848	09d716d57edc76d03136a0c475126554.exe	30
PID 848 wrote to memory of 2752	848	09d716d57edc76d03136a0c475126554.exe	30

C:\Users\Admin\AppData\Local\Temp\09d716d57edc76d03136a0c475126554.exe
"C:\Users\Admin\AppData\Local\Temp\09d716d57edc76d03136a0c475126554.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2984
- C:\Users\Admin\AppData\Local\Temp\09d716d57edc76d03136a0c475126554.exe
  "C:\Users\Admin\AppData\Local\Temp\09d716d57edc76d03136a0c475126554.exe"
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:848

C:\Users\Admin\AppData\Local\Temp\09d716d57edc76d03136a0c475126554.exe
"C:\Users\Admin\AppData\Local\Temp\09d716d57edc76d03136a0c475126554.exe"
1⤵
- Writes to the Master Boot Record (MBR)
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1272

C:\Users\Admin\AppData\Local\Temp\09d716d57edc76d03136a0c475126554.exe
"C:\Users\Admin\AppData\Local\Temp\09d716d57edc76d03136a0c475126554.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:2752

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

Replay Monitor

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Downloads

memory/848-45-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/848-18-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/848-20-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/848-22-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/848-28-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/848-32-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2752-50-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2752-35-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2752-43-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2752-53-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2752-51-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2752-39-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2752-37-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2984-4-0x0000000000400000-0x0000000000443000-memory.dmp

Filesize
268KB

Download
memory/2984-6-0x0000000000400000-0x0000000000443000-memory.dmp

Filesize
268KB

Download
memory/2984-8-0x0000000000400000-0x0000000000443000-memory.dmp

Filesize
268KB

Download
memory/2984-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2984-12-0x0000000000400000-0x0000000000443000-memory.dmp

Filesize
268KB

Download
memory/2984-17-0x0000000000400000-0x0000000000443000-memory.dmp

Filesize
268KB

Download
memory/2984-29-0x0000000000400000-0x0000000000443000-memory.dmp

Filesize
268KB

Download
memory/2984-2-0x0000000000400000-0x0000000000443000-memory.dmp

Filesize
268KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads