isrstealer | 99cd0b4791ba31a7462d5c17b1e9a28c8be58063ce29cb975f217001041f1760

General

Target

7d306b63492e111434a68d343259f1b5_JaffaCakes118.exe
Size

536KB
MD5

7d306b63492e111434a68d343259f1b5
SHA1

ae0bb21e16036f5ba2023ec623d8163aad9a9077
SHA256

99cd0b4791ba31a7462d5c17b1e9a28c8be58063ce29cb975f217001041f1760
SHA512

b575736a097b378e540aea8249eee17e9fbec3a4f8e9a4c0ae6c98694fe3a7f9850d3118c2a636c5af12fa965474f4f44afd442e2b524ed16e2116b303664bee
SSDEEP

12288:U022tBnaBu7XYOGdVvdI6xQ4qvUVDBFkf+dmEdx4WeDMYc/J:UkBnaBu7IOGrvdIR4q4zkf+dT4W5rB

Score

10^/10

isrstealer credential_access discovery 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

Processes:

resource	yara_rule
behavioral2/memory/2596-3-0x0000000000400000-0x0000000000451000-memory.dmp	family_isrstealer
behavioral2/memory/2596-5-0x0000000000400000-0x0000000000451000-memory.dmp	family_isrstealer
behavioral2/memory/2596-26-0x0000000000400000-0x0000000000451000-memory.dmp	family_isrstealer

Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Detected Nirsoft tools 3 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

Processes:

resource	yara_rule
behavioral2/memory/4600-17-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4600-22-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft
behavioral2/memory/4600-13-0x0000000000400000-0x0000000000454000-memory.dmp	Nirsoft

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral2/memory/4600-17-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4600-22-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView
behavioral2/memory/4600-13-0x0000000000400000-0x0000000000454000-memory.dmp	WebBrowserPassView

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 3 IoCs

Processes:

7d306b63492e111434a68d343259f1b5_JaffaCakes118.exevbc.exevbc.exe

description	pid	process	target process
PID 4980 set thread context of 2596	4980	7d306b63492e111434a68d343259f1b5_JaffaCakes118.exe	vbc.exe
PID 2596 set thread context of 3232	2596	vbc.exe	vbc.exe
PID 3232 set thread context of 4600	3232	vbc.exe	vbc.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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

Processes:

vbc.exevbc.exe7d306b63492e111434a68d343259f1b5_JaffaCakes118.exevbc.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7d306b63492e111434a68d343259f1b5_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

vbc.exe

pid process

2596 vbc.exe
2596 vbc.exe
2596 vbc.exe
2596 vbc.exe
2596 vbc.exe
2596 vbc.exe
2596 vbc.exe
2596 vbc.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

2596 vbc.exe

pid	process
2596	vbc.exe
2596	vbc.exe
2596	vbc.exe
2596	vbc.exe
2596	vbc.exe
2596	vbc.exe
2596	vbc.exe
2596	vbc.exe

pid	process
2596	vbc.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

7d306b63492e111434a68d343259f1b5_JaffaCakes118.exevbc.exevbc.exe

description	pid	process	target process
PID 4980 wrote to memory of 2596	4980	7d306b63492e111434a68d343259f1b5_JaffaCakes118.exe	vbc.exe
PID 4980 wrote to memory of 2596	4980	7d306b63492e111434a68d343259f1b5_JaffaCakes118.exe	vbc.exe
PID 4980 wrote to memory of 2596	4980	7d306b63492e111434a68d343259f1b5_JaffaCakes118.exe	vbc.exe
PID 4980 wrote to memory of 2596	4980	7d306b63492e111434a68d343259f1b5_JaffaCakes118.exe	vbc.exe
PID 4980 wrote to memory of 2596	4980	7d306b63492e111434a68d343259f1b5_JaffaCakes118.exe	vbc.exe
PID 4980 wrote to memory of 2596	4980	7d306b63492e111434a68d343259f1b5_JaffaCakes118.exe	vbc.exe
PID 4980 wrote to memory of 2596	4980	7d306b63492e111434a68d343259f1b5_JaffaCakes118.exe	vbc.exe
PID 4980 wrote to memory of 2596	4980	7d306b63492e111434a68d343259f1b5_JaffaCakes118.exe	vbc.exe
PID 2596 wrote to memory of 3232	2596	vbc.exe	vbc.exe
PID 2596 wrote to memory of 3232	2596	vbc.exe	vbc.exe
PID 2596 wrote to memory of 3232	2596	vbc.exe	vbc.exe
PID 2596 wrote to memory of 3232	2596	vbc.exe	vbc.exe
PID 2596 wrote to memory of 3232	2596	vbc.exe	vbc.exe
PID 2596 wrote to memory of 3232	2596	vbc.exe	vbc.exe
PID 2596 wrote to memory of 3232	2596	vbc.exe	vbc.exe
PID 2596 wrote to memory of 3232	2596	vbc.exe	vbc.exe
PID 2596 wrote to memory of 3232	2596	vbc.exe	vbc.exe
PID 2596 wrote to memory of 3232	2596	vbc.exe	vbc.exe
PID 2596 wrote to memory of 3232	2596	vbc.exe	vbc.exe
PID 2596 wrote to memory of 3232	2596	vbc.exe	vbc.exe
PID 2596 wrote to memory of 3232	2596	vbc.exe	vbc.exe
PID 3232 wrote to memory of 4600	3232	vbc.exe	vbc.exe
PID 3232 wrote to memory of 4600	3232	vbc.exe	vbc.exe
PID 3232 wrote to memory of 4600	3232	vbc.exe	vbc.exe
PID 3232 wrote to memory of 4600	3232	vbc.exe	vbc.exe
PID 3232 wrote to memory of 4600	3232	vbc.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\7d306b63492e111434a68d343259f1b5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\7d306b63492e111434a68d343259f1b5_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4980
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2596
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3232
  - - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
      4⤵
      System Location Discovery: System Language Discovery
      PID:4600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

1

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2596-5-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/2596-26-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/2596-24-0x0000000000460000-0x0000000000529000-memory.dmp

Filesize
804KB

Download
memory/2596-3-0x0000000000400000-0x0000000000451000-memory.dmp

Filesize
324KB

Download
memory/3232-12-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/3232-11-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/3232-10-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/3232-9-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/3232-19-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/4600-17-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4600-22-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4600-13-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/4980-0-0x00000000746F2000-0x00000000746F3000-memory.dmp

Filesize
4KB

Download
memory/4980-16-0x00000000746F0000-0x0000000074CA1000-memory.dmp

Filesize
5.7MB

Download
memory/4980-2-0x00000000746F0000-0x0000000074CA1000-memory.dmp

Filesize
5.7MB

Download
memory/4980-1-0x00000000746F0000-0x0000000074CA1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads