isrstealer | 1ce6a38b35f833c24a30a8fcbf107c781dc47a27990b3c1fdc04c420c3b88b7d

General

Target

82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe
Size

215KB
MD5

82800ea690f33cb08cee91bc93c125ed
SHA1

2cfe0745860a3d4ab3ceb3294dc65f6109067c90
SHA256

1ce6a38b35f833c24a30a8fcbf107c781dc47a27990b3c1fdc04c420c3b88b7d
SHA512

3f92df78c2b89b7c87945a55e375b178cbe790fb245c47544008341ffb37fb90187d85ceb1c6f7d4b351ed1908fb7f1867b8c7d90310503c36bf2144291bdf23
SSDEEP

1536:o2+QgZRa6s1ibsjLuMtzxRX4x6+ngPBpECejwQ/q2kViOHyayHh635x9BxSGvRua:oq28pYh+MXaX+q6u

Score

10^/10

isrstealer discovery persistence 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/2752-12-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2752-8-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2752-19-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2752-22-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\Java Update = "C:\\Users\\Admin\\AppData\\Local\\Temp\\KgFLHSWkGIRaVyPhCV.exe"	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe

description	pid	Process	procid_target
PID 2660 set thread context of 2752	2660	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	30

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

Processes:

82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exevbc.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

vbc.exe

pid	Process
2752	vbc.exe
2752	vbc.exe
2752	vbc.exe
2752	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid	Process
2752	vbc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe

description	pid	Process	procid_target
PID 2660 wrote to memory of 2752	2660	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	30
PID 2660 wrote to memory of 2752	2660	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	30
PID 2660 wrote to memory of 2752	2660	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	30
PID 2660 wrote to memory of 2752	2660	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	30
PID 2660 wrote to memory of 2752	2660	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	30
PID 2660 wrote to memory of 2752	2660	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	30
PID 2660 wrote to memory of 2752	2660	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	30
PID 2660 wrote to memory of 2752	2660	82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\82800ea690f33cb08cee91bc93c125ed_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2660
- C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:2752

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

1

T1064

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

Scripting

Credential Access

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/2660-3-0x0000000074350000-0x00000000748FB000-memory.dmp

Filesize
5.7MB

Download
memory/2660-1-0x0000000074350000-0x00000000748FB000-memory.dmp

Filesize
5.7MB

Download
memory/2660-17-0x0000000074350000-0x00000000748FB000-memory.dmp

Filesize
5.7MB

Download
memory/2660-0-0x0000000074351000-0x0000000074352000-memory.dmp

Filesize
4KB

Download
memory/2752-18-0x00000000003A0000-0x00000000003B7000-memory.dmp

Filesize
92KB

Download
memory/2752-12-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2752-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2752-8-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2752-6-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2752-4-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2752-19-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2752-22-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2752-21-0x0000000000420000-0x00000000004FF000-memory.dmp

Filesize
892KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads