isrstealer | 82b97f1b70a094dacaed629d675d189c12b3f72c5328c0b95049f1d0d95ecc76

General

Target

2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe
Size

256KB
MD5

2d8dab55e52cd1db4e7de3534258b691
SHA1

81bcea9af1855336c0cd37136757115ad48bf78c
SHA256

82b97f1b70a094dacaed629d675d189c12b3f72c5328c0b95049f1d0d95ecc76
SHA512

4450bce2d6daa25080b78adc9db8d0f60e1f52b9a6fd8f96f08dd63bfe686e216f4065b05ddefe5abe7f93243c9ab46c7f84e27f1df39483daca081597080528
SSDEEP

3072:NHnBpEqXneZRZ6YRTRRRRRRRRRRRRRTwgF/T8Tgw0+7JoG+4GRRRRRRRRRRRRRRw:tnBp3Xn2cT3Duh43t8ThePcDtsr1

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/1736-25-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1736-21-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1736-33-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1736-34-0x0000000000400000-0x0000000000414000-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	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2444 set thread context of 2376	2444	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	30
PID 2376 set thread context of 1736	2376	2d8dab55e52cd1db4e7de3534258b691_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
1736	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe
1736	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe
1736	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe
1736	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2444	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe
2376	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe
1736	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2444 wrote to memory of 2376	2444	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	30
PID 2444 wrote to memory of 2376	2444	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	30
PID 2444 wrote to memory of 2376	2444	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	30
PID 2444 wrote to memory of 2376	2444	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	30
PID 2444 wrote to memory of 2376	2444	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	30
PID 2444 wrote to memory of 2376	2444	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	30
PID 2444 wrote to memory of 2376	2444	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	30
PID 2444 wrote to memory of 2376	2444	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	30
PID 2444 wrote to memory of 2376	2444	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	30
PID 2376 wrote to memory of 1736	2376	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	31
PID 2376 wrote to memory of 1736	2376	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	31
PID 2376 wrote to memory of 1736	2376	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	31
PID 2376 wrote to memory of 1736	2376	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	31
PID 2376 wrote to memory of 1736	2376	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	31
PID 2376 wrote to memory of 1736	2376	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	31
PID 2376 wrote to memory of 1736	2376	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	31
PID 2376 wrote to memory of 1736	2376	2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe	31

C:\Users\Admin\AppData\Local\Temp\2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2444
- C:\Users\Admin\AppData\Local\Temp\2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe"
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2376
- - C:\Users\Admin\AppData\Local\Temp\2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\2d8dab55e52cd1db4e7de3534258b691_JaffaCakes118.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:1736

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/1736-21-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1736-17-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1736-25-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1736-19-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1736-33-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1736-34-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2376-14-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2376-6-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2376-4-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2376-12-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2376-2-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2376-30-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2376-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads