isrstealer | a6b1433d5eb3cb2da2ac105facbbf9710be85fed5879c2f6e41995da3dcc343c

Analysis

max time kernel
122s
max time network
126s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
27-06-2024 19:49

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General

Target

174e374ba051fd69d6cfc15f0c7c4333_JaffaCakes118.exe
Size

528KB
MD5

174e374ba051fd69d6cfc15f0c7c4333
SHA1

3235f3da2fc9f7294033caa06b2b23b0e855cae6
SHA256

a6b1433d5eb3cb2da2ac105facbbf9710be85fed5879c2f6e41995da3dcc343c
SHA512

bcd30f034d3734cb8b535d6dc603cff6615b44f3278090eda5e6b0058a975009c7db2ff9b56c1db6e4ec0e715df0d82785dc70389af99518e0d3c1edca5b6537
SSDEEP

3072:aK5rI0MAfDbj7dSKOSdFIq4fD/1HrugZjyOM3gf9C7XKhj7:PXpaLxrVZjs3gFCjK

Score

10^/10

isrstealer evasion 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/1148-10-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1148-6-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral1/memory/1148-16-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Disables RegEdit via registry modification 1 IoCs

evasion

Processes:

174e374ba051fd69d6cfc15f0c7c4333_JaffaCakes118.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-3691908287-3775019229-3534252667-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	174e374ba051fd69d6cfc15f0c7c4333_JaffaCakes118.exe

Disables Task Manager via registry modification
evasion
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Suspicious use of SetThreadContext 1 IoCs

Processes:

174e374ba051fd69d6cfc15f0c7c4333_JaffaCakes118.exe

description pid process target process

PID 1684 set thread context of 1148 1684 174e374ba051fd69d6cfc15f0c7c4333_JaffaCakes118.exe vbc.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

vbc.exe

pid process

1148 vbc.exe
1148 vbc.exe
1148 vbc.exe
1148 vbc.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

1148 vbc.exe

description	pid	process	target process
PID 1684 set thread context of 1148	1684	174e374ba051fd69d6cfc15f0c7c4333_JaffaCakes118.exe	vbc.exe

pid	process
1148	vbc.exe
1148	vbc.exe
1148	vbc.exe
1148	vbc.exe

pid	process
1148	vbc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

174e374ba051fd69d6cfc15f0c7c4333_JaffaCakes118.exe

description	pid	process	target process
PID 1684 wrote to memory of 1148	1684	174e374ba051fd69d6cfc15f0c7c4333_JaffaCakes118.exe	vbc.exe
PID 1684 wrote to memory of 1148	1684	174e374ba051fd69d6cfc15f0c7c4333_JaffaCakes118.exe	vbc.exe
PID 1684 wrote to memory of 1148	1684	174e374ba051fd69d6cfc15f0c7c4333_JaffaCakes118.exe	vbc.exe
PID 1684 wrote to memory of 1148	1684	174e374ba051fd69d6cfc15f0c7c4333_JaffaCakes118.exe	vbc.exe
PID 1684 wrote to memory of 1148	1684	174e374ba051fd69d6cfc15f0c7c4333_JaffaCakes118.exe	vbc.exe
PID 1684 wrote to memory of 1148	1684	174e374ba051fd69d6cfc15f0c7c4333_JaffaCakes118.exe	vbc.exe
PID 1684 wrote to memory of 1148	1684	174e374ba051fd69d6cfc15f0c7c4333_JaffaCakes118.exe	vbc.exe
PID 1684 wrote to memory of 1148	1684	174e374ba051fd69d6cfc15f0c7c4333_JaffaCakes118.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\174e374ba051fd69d6cfc15f0c7c4333_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\174e374ba051fd69d6cfc15f0c7c4333_JaffaCakes118.exe"
1⤵
- Disables RegEdit via registry modification
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1684
- 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:1148

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

T1064

Persistence

Privilege Escalation

Defense Evasion

Scripting

T1064

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1148-3-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1148-8-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1148-10-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1148-6-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1148-5-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1148-16-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1684-0-0x00000000747F1000-0x00000000747F2000-memory.dmp

Filesize
4KB

Download
memory/1684-1-0x00000000747F0000-0x0000000074D9B000-memory.dmp

Filesize
5.7MB

Download
memory/1684-2-0x00000000747F0000-0x0000000074D9B000-memory.dmp

Filesize
5.7MB

Download
memory/1684-17-0x00000000747F0000-0x0000000074D9B000-memory.dmp

Filesize
5.7MB

Download