isrstealer | df82e266201cdd7e106c40b51989a8ca2a8ee48f1f6ca83ee72d19d774bbe103

General

Target

JaffaCakes118_24b153f07bb805848770e79093e57f60.exe
Size

120KB
MD5

24b153f07bb805848770e79093e57f60
SHA1

4da0a80502242ed5792e1bbeba1924a6f6827f0c
SHA256

df82e266201cdd7e106c40b51989a8ca2a8ee48f1f6ca83ee72d19d774bbe103
SHA512

cb7bd8916d036784c5e67dbd0e7cd818b4528fde9d6523fc104829d6cc38e8ba45cf779cdefaace80f837c3a8b6a2deeb8374571c85cd0db66f8214da46d2a12
SSDEEP

3072:6La94GN7fiIEAeLHJx0CNPyUaohDDdhZd5VrEnxVYyAeiurVq:6La94GN7fiIEAeLHJx0CN8od531icyp2

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 3 IoCs

resource	yara_rule
behavioral1/memory/2308-10-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2308-6-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2308-15-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Isrstealer 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 3 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

Credentials from Web Browsers
T1555.003

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	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1956 set thread context of 2308	1956	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe	31

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 2 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	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe

Modifies registry class 3 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\MIME\Database	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\MIME\Database\Charset	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\MIME\Database\Codepage	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2308	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe
2308	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe
2308	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe
2308	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1956	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe
2308	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 2308	1956	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe	31
PID 1956 wrote to memory of 2308	1956	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe	31
PID 1956 wrote to memory of 2308	1956	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe	31
PID 1956 wrote to memory of 2308	1956	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe	31
PID 1956 wrote to memory of 2308	1956	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe	31
PID 1956 wrote to memory of 2308	1956	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe	31
PID 1956 wrote to memory of 2308	1956	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe	31
PID 1956 wrote to memory of 2308	1956	JaffaCakes118_24b153f07bb805848770e79093e57f60.exe	31

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_24b153f07bb805848770e79093e57f60.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_24b153f07bb805848770e79093e57f60.exe"
1⤵
- 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:1956
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_24b153f07bb805848770e79093e57f60.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_24b153f07bb805848770e79093e57f60.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:2308

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

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

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/2308-10-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2308-8-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2308-6-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2308-4-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2308-2-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2308-15-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads