isrstealer | 7af8c772caed41f1a243a096981c025e2c364cb5558a00e13abdbb25294790fd

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
19-07-2024 10:22

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General

Target

5b87ab2ceb3f3899bc3848652682fe2d_JaffaCakes118.exe
Size

246KB
MD5

5b87ab2ceb3f3899bc3848652682fe2d
SHA1

d73084893a06735896ec3a55a60b698e8ae14381
SHA256

7af8c772caed41f1a243a096981c025e2c364cb5558a00e13abdbb25294790fd
SHA512

a24b8802312ee7c177bacad4293494cd9288369b11c6daa1b634c783b19ad15068549921129202c638e8bdcf050ecdabca406265a0a1cd5d39172285e129a051
SSDEEP

3072:hPxnpiwEjTChKS+qS71n9ck5IVH8mSXOiwg81GguIoWzSrtqv2Nf3Zkdu:vdHhK2Sp9ckUH8maOii1Gg/1YP32

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
behavioral2/memory/4132-4-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/4132-7-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/4132-12-0x0000000000400000-0x0000000000414000-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:

5b87ab2ceb3f3899bc3848652682fe2d_JaffaCakes118.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3419463127-3903270268-2580331543-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Java Update = "C:\\Users\\Admin\\AppData\\Local\\Temp\\VrQWSdgvRSclgKZsMf.exe"	5b87ab2ceb3f3899bc3848652682fe2d_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

5b87ab2ceb3f3899bc3848652682fe2d_JaffaCakes118.exe

description pid process target process

PID 4464 set thread context of 4132 4464 5b87ab2ceb3f3899bc3848652682fe2d_JaffaCakes118.exe vbc.exe
Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

vbc.exe

pid process

4132 vbc.exe
4132 vbc.exe
4132 vbc.exe
4132 vbc.exe
4132 vbc.exe
4132 vbc.exe
4132 vbc.exe
4132 vbc.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

4132 vbc.exe

description	pid	process	target process
PID 4464 set thread context of 4132	4464	5b87ab2ceb3f3899bc3848652682fe2d_JaffaCakes118.exe	vbc.exe

pid	process
4132	vbc.exe
4132	vbc.exe
4132	vbc.exe
4132	vbc.exe
4132	vbc.exe
4132	vbc.exe
4132	vbc.exe
4132	vbc.exe

pid	process
4132	vbc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

5b87ab2ceb3f3899bc3848652682fe2d_JaffaCakes118.exe

description	pid	process	target process
PID 4464 wrote to memory of 4132	4464	5b87ab2ceb3f3899bc3848652682fe2d_JaffaCakes118.exe	vbc.exe
PID 4464 wrote to memory of 4132	4464	5b87ab2ceb3f3899bc3848652682fe2d_JaffaCakes118.exe	vbc.exe
PID 4464 wrote to memory of 4132	4464	5b87ab2ceb3f3899bc3848652682fe2d_JaffaCakes118.exe	vbc.exe
PID 4464 wrote to memory of 4132	4464	5b87ab2ceb3f3899bc3848652682fe2d_JaffaCakes118.exe	vbc.exe
PID 4464 wrote to memory of 4132	4464	5b87ab2ceb3f3899bc3848652682fe2d_JaffaCakes118.exe	vbc.exe
PID 4464 wrote to memory of 4132	4464	5b87ab2ceb3f3899bc3848652682fe2d_JaffaCakes118.exe	vbc.exe
PID 4464 wrote to memory of 4132	4464	5b87ab2ceb3f3899bc3848652682fe2d_JaffaCakes118.exe	vbc.exe
PID 4464 wrote to memory of 4132	4464	5b87ab2ceb3f3899bc3848652682fe2d_JaffaCakes118.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\5b87ab2ceb3f3899bc3848652682fe2d_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\5b87ab2ceb3f3899bc3848652682fe2d_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4464
- 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:4132

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/4132-4-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4132-7-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4132-11-0x0000000000420000-0x00000000004E9000-memory.dmp

Filesize
804KB

Download
memory/4132-12-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4464-0-0x0000000075432000-0x0000000075433000-memory.dmp

Filesize
4KB

Download
memory/4464-1-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/4464-2-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download
memory/4464-10-0x0000000075430000-0x00000000759E1000-memory.dmp

Filesize
5.7MB

Download