isrstealer | 59f0e3541fbf99774fcc96826f1fe8ad81611c782cc904b7d8c0568ba1a0698b

General

Target

7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe
Size

388KB
MD5

7723cd880e8c6fa9774b243da4ec1bdb
SHA1

384170bbb8f68701d0b9a197b397e99758e014aa
SHA256

59f0e3541fbf99774fcc96826f1fe8ad81611c782cc904b7d8c0568ba1a0698b
SHA512

9767e94746eefa0abea68ca2b26fb8aaf573f5b7f6ac78bd176579896014409d9cd48735b6cc07ac4fbadca568bcd06217315f452803bba10efa3e63fabc5a5a
SSDEEP

6144:8nBp3Xn2YSV6zG3KzkfqLp/cxFTWueDEPRf+1gSPuAaSAYPrhFCRf:Apa1KzkA/cxgutuPuhSAYThFCR

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/2300-35-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2300-29-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2300-22-0x0000000000400000-0x0000000000414000-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	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3064 set thread context of 1628	3064	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	29
PID 1628 set thread context of 2300	1628	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	30

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 3 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	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2300	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe
2300	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe
2300	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe
2300	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
3064	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe
1628	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe
2300	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3064 wrote to memory of 1628	3064	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	29
PID 3064 wrote to memory of 1628	3064	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	29
PID 3064 wrote to memory of 1628	3064	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	29
PID 3064 wrote to memory of 1628	3064	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	29
PID 3064 wrote to memory of 1628	3064	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	29
PID 3064 wrote to memory of 1628	3064	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	29
PID 3064 wrote to memory of 1628	3064	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	29
PID 3064 wrote to memory of 1628	3064	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	29
PID 3064 wrote to memory of 1628	3064	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	29
PID 1628 wrote to memory of 2300	1628	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	30
PID 1628 wrote to memory of 2300	1628	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	30
PID 1628 wrote to memory of 2300	1628	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	30
PID 1628 wrote to memory of 2300	1628	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	30
PID 1628 wrote to memory of 2300	1628	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	30
PID 1628 wrote to memory of 2300	1628	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	30
PID 1628 wrote to memory of 2300	1628	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	30
PID 1628 wrote to memory of 2300	1628	7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3064
- C:\Users\Admin\AppData\Local\Temp\7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe"
  2⤵
  - 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:1628
- - C:\Users\Admin\AppData\Local\Temp\7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\7723cd880e8c6fa9774b243da4ec1bdb_JaffaCakes118.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:2300

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

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

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1628-32-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1628-15-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1628-12-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1628-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1628-4-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1628-6-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1628-2-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2300-35-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2300-29-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2300-22-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2300-20-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2300-18-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads