isrstealer | cf7e2983b8fef5a9588080285389d57a5f6b738ca2f00639a8edebf2ee473835

Analysis

max time kernel
14s
max time network
20s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
23-07-2024 07:48

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General

Target

66b852a9c91b240e80f7e59bab108298_JaffaCakes118.exe
Size

247KB
MD5

66b852a9c91b240e80f7e59bab108298
SHA1

9accc7f379bf198237835fa7d58c299cee47f7cf
SHA256

cf7e2983b8fef5a9588080285389d57a5f6b738ca2f00639a8edebf2ee473835
SHA512

3e3b5623518101d49b41118cdcba2d694e8d73ff683adaf763372b1a4b29e9848ab5da1b5c1ec804bde61f195a1cca4e76c435a334619d88b56776b671f243c8
SSDEEP

3072:Y7tfvw/idrxY5reRd1sSPwD/lPALbIiuS:tiJxgeRd1sSPQiu

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

Processes:

resource	yara_rule
behavioral1/memory/2128-8-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2128-12-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/2128-20-0x0000000000400000-0x0000000000414000-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:

66b852a9c91b240e80f7e59bab108298_JaffaCakes118.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Windows\CurrentVersion\Run\Java Update = "C:\\Users\\Admin\\AppData\\Local\\Temp\\LgGLITWlHIRbWzPiCV.exe"	66b852a9c91b240e80f7e59bab108298_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

66b852a9c91b240e80f7e59bab108298_JaffaCakes118.exe

description	pid	Process	procid_target
PID 1952 set thread context of 2128	1952	66b852a9c91b240e80f7e59bab108298_JaffaCakes118.exe	30

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

vbc.exe

pid	Process
2128	vbc.exe
2128	vbc.exe
2128	vbc.exe
2128	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid	Process
2128	vbc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

66b852a9c91b240e80f7e59bab108298_JaffaCakes118.exe

description	pid	Process	procid_target
PID 1952 wrote to memory of 2128	1952	66b852a9c91b240e80f7e59bab108298_JaffaCakes118.exe	30
PID 1952 wrote to memory of 2128	1952	66b852a9c91b240e80f7e59bab108298_JaffaCakes118.exe	30
PID 1952 wrote to memory of 2128	1952	66b852a9c91b240e80f7e59bab108298_JaffaCakes118.exe	30
PID 1952 wrote to memory of 2128	1952	66b852a9c91b240e80f7e59bab108298_JaffaCakes118.exe	30
PID 1952 wrote to memory of 2128	1952	66b852a9c91b240e80f7e59bab108298_JaffaCakes118.exe	30
PID 1952 wrote to memory of 2128	1952	66b852a9c91b240e80f7e59bab108298_JaffaCakes118.exe	30
PID 1952 wrote to memory of 2128	1952	66b852a9c91b240e80f7e59bab108298_JaffaCakes118.exe	30
PID 1952 wrote to memory of 2128	1952	66b852a9c91b240e80f7e59bab108298_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\66b852a9c91b240e80f7e59bab108298_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\66b852a9c91b240e80f7e59bab108298_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1952
- 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:2128

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

Replay Monitor

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Downloads

memory/1952-0-0x0000000074391000-0x0000000074392000-memory.dmp

Filesize
4KB

Download
memory/1952-1-0x0000000074390000-0x000000007493B000-memory.dmp

Filesize
5.7MB

Download
memory/1952-2-0x0000000074390000-0x000000007493B000-memory.dmp

Filesize
5.7MB

Download
memory/1952-17-0x0000000074390000-0x000000007493B000-memory.dmp

Filesize
5.7MB

Download
memory/2128-8-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2128-12-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2128-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2128-6-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2128-4-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2128-18-0x0000000000420000-0x00000000004FF000-memory.dmp

Filesize
892KB

Download
memory/2128-20-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download