isrstealer | a4c3779c665ff0b55ad100d952211b8a0d7d063764ad85811e239124535d6cc9

Analysis

max time kernel
119s
max time network
121s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
08-07-2024 21:43

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General

Target

2de955495a987336b32f27d3e84d8c1a_JaffaCakes118.exe
Size

205KB
MD5

2de955495a987336b32f27d3e84d8c1a
SHA1

7609b0324872ebdd2e74f485ca0bba8dfa30cff9
SHA256

a4c3779c665ff0b55ad100d952211b8a0d7d063764ad85811e239124535d6cc9
SHA512

8b717fd9da4d56f5a680b82822c8c063f7766d5f6d45fd90c0850852594e5ccb722c2528945a08497c672764919dacdcb666463f1bbd2f5075212c5393b3c59a
SSDEEP

3072:JM2kKQtv3vwsyclCPCRnglKDqvTQCfzRaPP8/eR:oJv/ws6PCBgkDSYF

Score

10^/10

isrstealer 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 3 IoCs

resource	yara_rule
behavioral1/memory/1320-4-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1320-10-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1320-13-0x0000000000400000-0x0000000000414000-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

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows = "C:\\Users\\Admin\\AppData\\Roaming\\polo.exe"	2de955495a987336b32f27d3e84d8c1a_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2988 set thread context of 1320	2988	2de955495a987336b32f27d3e84d8c1a_JaffaCakes118.exe	30

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1320	vbc.exe
1320	vbc.exe
1320	vbc.exe
1320	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1320	vbc.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2988 wrote to memory of 1320	2988	2de955495a987336b32f27d3e84d8c1a_JaffaCakes118.exe	30
PID 2988 wrote to memory of 1320	2988	2de955495a987336b32f27d3e84d8c1a_JaffaCakes118.exe	30
PID 2988 wrote to memory of 1320	2988	2de955495a987336b32f27d3e84d8c1a_JaffaCakes118.exe	30
PID 2988 wrote to memory of 1320	2988	2de955495a987336b32f27d3e84d8c1a_JaffaCakes118.exe	30
PID 2988 wrote to memory of 1320	2988	2de955495a987336b32f27d3e84d8c1a_JaffaCakes118.exe	30
PID 2988 wrote to memory of 1320	2988	2de955495a987336b32f27d3e84d8c1a_JaffaCakes118.exe	30
PID 2988 wrote to memory of 1320	2988	2de955495a987336b32f27d3e84d8c1a_JaffaCakes118.exe	30
PID 2988 wrote to memory of 1320	2988	2de955495a987336b32f27d3e84d8c1a_JaffaCakes118.exe	30
PID 2988 wrote to memory of 1320	2988	2de955495a987336b32f27d3e84d8c1a_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\2de955495a987336b32f27d3e84d8c1a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\2de955495a987336b32f27d3e84d8c1a_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2988
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:1320

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

T1064

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Scripting

T1064

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1320-4-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1320-10-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1320-12-0x0000000000420000-0x0000000000487000-memory.dmp

Filesize
412KB

Download
memory/1320-13-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2988-0-0x0000000074431000-0x0000000074432000-memory.dmp

Filesize
4KB

Download
memory/2988-1-0x0000000074430000-0x00000000749DB000-memory.dmp

Filesize
5.7MB

Download
memory/2988-2-0x0000000074430000-0x00000000749DB000-memory.dmp

Filesize
5.7MB

Download
memory/2988-7-0x0000000074430000-0x00000000749DB000-memory.dmp

Filesize
5.7MB

Download