isrstealer | 8c0e1f0cb5679571cf2b129c98853018823e0e7674cfc7c5973d4053dfda0578

General

Target

13a199850a238ceff22998dd97323260_JaffaCakes118.exe
Size

190KB
MD5

13a199850a238ceff22998dd97323260
SHA1

e80c4eac7d8f04bae6b7ca7cc3f4df0d0efb0f22
SHA256

8c0e1f0cb5679571cf2b129c98853018823e0e7674cfc7c5973d4053dfda0578
SHA512

4bff87799025997a9013ce692257ac0895c518f2dd899988f6800fe245a8c40342673f949035996737aeb7eb68ba19acf163ababea4219cc8a857fc17c6d3fb8
SSDEEP

3072:zCOP+8j32s/exLyOpLXjeyYHbLIulrVGvZZbCwJkASIWzIbcligqgqxR7Lb:Pm99horZ6swCIWEbcliBZx

Score

10^/10

isrstealer 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

Processes:

resource	yara_rule
behavioral1/memory/2868-11-0x0000000000400000-0x000000000041A000-memory.dmp	family_isrstealer
behavioral1/memory/2868-17-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2868-19-0x0000000000400000-0x000000000041A000-memory.dmp	family_isrstealer
behavioral1/memory/2868-20-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Executes dropped EXE 2 IoCs

Processes:

u9qz1x.exeu9qz1x.exe

pid process

2864 u9qz1x.exe
2868 u9qz1x.exe
Loads dropped DLL 3 IoCs

Processes:

13a199850a238ceff22998dd97323260_JaffaCakes118.exeu9qz1x.exe

pid process

2232 13a199850a238ceff22998dd97323260_JaffaCakes118.exe
2232 13a199850a238ceff22998dd97323260_JaffaCakes118.exe
2864 u9qz1x.exe
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

pid	process
2864	u9qz1x.exe
2868	u9qz1x.exe

pid	process
2232	13a199850a238ceff22998dd97323260_JaffaCakes118.exe
2232	13a199850a238ceff22998dd97323260_JaffaCakes118.exe
2864	u9qz1x.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

u9qz1x.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows Update = "C:\\Users\\Admin\\AppData\\Roaming\\yregxj1ex6\\u9qz1x.exe"	u9qz1x.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

u9qz1x.exe

description pid process target process

PID 2864 set thread context of 2868 2864 u9qz1x.exe u9qz1x.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

u9qz1x.exe

pid process

2868 u9qz1x.exe
2868 u9qz1x.exe
2868 u9qz1x.exe
2868 u9qz1x.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

u9qz1x.exe

pid process

2868 u9qz1x.exe

description	pid	process	target process
PID 2864 set thread context of 2868	2864	u9qz1x.exe	u9qz1x.exe

pid	process
2868	u9qz1x.exe
2868	u9qz1x.exe
2868	u9qz1x.exe
2868	u9qz1x.exe

pid	process
2868	u9qz1x.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

13a199850a238ceff22998dd97323260_JaffaCakes118.exeu9qz1x.exe

description	pid	process	target process
PID 2232 wrote to memory of 2864	2232	13a199850a238ceff22998dd97323260_JaffaCakes118.exe	u9qz1x.exe
PID 2232 wrote to memory of 2864	2232	13a199850a238ceff22998dd97323260_JaffaCakes118.exe	u9qz1x.exe
PID 2232 wrote to memory of 2864	2232	13a199850a238ceff22998dd97323260_JaffaCakes118.exe	u9qz1x.exe
PID 2232 wrote to memory of 2864	2232	13a199850a238ceff22998dd97323260_JaffaCakes118.exe	u9qz1x.exe
PID 2864 wrote to memory of 2868	2864	u9qz1x.exe	u9qz1x.exe
PID 2864 wrote to memory of 2868	2864	u9qz1x.exe	u9qz1x.exe
PID 2864 wrote to memory of 2868	2864	u9qz1x.exe	u9qz1x.exe
PID 2864 wrote to memory of 2868	2864	u9qz1x.exe	u9qz1x.exe
PID 2864 wrote to memory of 2868	2864	u9qz1x.exe	u9qz1x.exe
PID 2864 wrote to memory of 2868	2864	u9qz1x.exe	u9qz1x.exe
PID 2864 wrote to memory of 2868	2864	u9qz1x.exe	u9qz1x.exe
PID 2864 wrote to memory of 2868	2864	u9qz1x.exe	u9qz1x.exe
PID 2864 wrote to memory of 2868	2864	u9qz1x.exe	u9qz1x.exe

C:\Users\Admin\AppData\Local\Temp\13a199850a238ceff22998dd97323260_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\13a199850a238ceff22998dd97323260_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2232
- C:\Users\Admin\AppData\Roaming\yregxj1ex6\u9qz1x.exe
  "C:\Users\Admin\AppData\Roaming\yregxj1ex6\u9qz1x.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:2864
- - C:\Users\Admin\AppData\Roaming\yregxj1ex6\u9qz1x.exe
    "C:\Users\Admin\AppData\Roaming\yregxj1ex6\u9qz1x.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:2868

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

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

\Users\Admin\AppData\Roaming\yregxj1ex6\u9qz1x.exe

Filesize
190KB

MD5
13a199850a238ceff22998dd97323260

SHA1
e80c4eac7d8f04bae6b7ca7cc3f4df0d0efb0f22

SHA256
8c0e1f0cb5679571cf2b129c98853018823e0e7674cfc7c5973d4053dfda0578

SHA512
4bff87799025997a9013ce692257ac0895c518f2dd899988f6800fe245a8c40342673f949035996737aeb7eb68ba19acf163ababea4219cc8a857fc17c6d3fb8

Download Submit
memory/2232-1-0x0000000000020000-0x0000000000021000-memory.dmp

Filesize
4KB

Download
memory/2868-11-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/2868-17-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2868-19-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/2868-20-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads