isrstealer | b14bdd109476eaa953a82b4b84b986c51f0a54b191456a2fade24440e290949b

Analysis

max time kernel
93s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
04-02-2024 09:36

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General

Target

8ed0a912c2804f163918c6f99a5f3f85.exe
Size

284KB
MD5

8ed0a912c2804f163918c6f99a5f3f85
SHA1

55115fed0538e4f5c71a7c669c0e0ccbc1edf262
SHA256

b14bdd109476eaa953a82b4b84b986c51f0a54b191456a2fade24440e290949b
SHA512

9dc420a843031d6d8c493f55e5d2240291b838f5490c680591371baeb250165aa89559cd1d2cad6d52523ce29dcdd674a881bff93f4d2741d49d91c564a47063
SSDEEP

6144:b9g7tPq72R2PkhgulFe7H8qDSJ12PYOCpGG+:S7txcMCulF0VDSvMOAG

Score

10^/10

isrstealer spyware stealer trojan upx

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
behavioral2/memory/2288-4-0x0000000000400000-0x0000000000433000-memory.dmp	family_isrstealer
behavioral2/memory/2288-2-0x0000000000400000-0x0000000000433000-memory.dmp	family_isrstealer
behavioral2/memory/2288-16-0x0000000000400000-0x0000000000433000-memory.dmp	family_isrstealer

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3268-7-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3268-9-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3268-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3268-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3268-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3488 set thread context of 2288	3488	8ed0a912c2804f163918c6f99a5f3f85.exe	84
PID 2288 set thread context of 3268	2288	8ed0a912c2804f163918c6f99a5f3f85.EXE	85

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3488	8ed0a912c2804f163918c6f99a5f3f85.exe
2288	8ed0a912c2804f163918c6f99a5f3f85.EXE

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3488 wrote to memory of 2288	3488	8ed0a912c2804f163918c6f99a5f3f85.exe	84
PID 3488 wrote to memory of 2288	3488	8ed0a912c2804f163918c6f99a5f3f85.exe	84
PID 3488 wrote to memory of 2288	3488	8ed0a912c2804f163918c6f99a5f3f85.exe	84
PID 3488 wrote to memory of 2288	3488	8ed0a912c2804f163918c6f99a5f3f85.exe	84
PID 3488 wrote to memory of 2288	3488	8ed0a912c2804f163918c6f99a5f3f85.exe	84
PID 3488 wrote to memory of 2288	3488	8ed0a912c2804f163918c6f99a5f3f85.exe	84
PID 3488 wrote to memory of 2288	3488	8ed0a912c2804f163918c6f99a5f3f85.exe	84
PID 3488 wrote to memory of 2288	3488	8ed0a912c2804f163918c6f99a5f3f85.exe	84
PID 2288 wrote to memory of 3268	2288	8ed0a912c2804f163918c6f99a5f3f85.EXE	85
PID 2288 wrote to memory of 3268	2288	8ed0a912c2804f163918c6f99a5f3f85.EXE	85
PID 2288 wrote to memory of 3268	2288	8ed0a912c2804f163918c6f99a5f3f85.EXE	85
PID 2288 wrote to memory of 3268	2288	8ed0a912c2804f163918c6f99a5f3f85.EXE	85
PID 2288 wrote to memory of 3268	2288	8ed0a912c2804f163918c6f99a5f3f85.EXE	85
PID 2288 wrote to memory of 3268	2288	8ed0a912c2804f163918c6f99a5f3f85.EXE	85
PID 2288 wrote to memory of 3268	2288	8ed0a912c2804f163918c6f99a5f3f85.EXE	85
PID 2288 wrote to memory of 3268	2288	8ed0a912c2804f163918c6f99a5f3f85.EXE	85

C:\Users\Admin\AppData\Local\Temp\8ed0a912c2804f163918c6f99a5f3f85.exe
"C:\Users\Admin\AppData\Local\Temp\8ed0a912c2804f163918c6f99a5f3f85.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3488
- C:\Users\Admin\AppData\Local\Temp\8ed0a912c2804f163918c6f99a5f3f85.EXE
  "C:\Users\Admin\AppData\Local\Temp\8ed0a912c2804f163918c6f99a5f3f85.EXE"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2288
- - C:\Users\Admin\AppData\Local\Temp\8ed0a912c2804f163918c6f99a5f3f85.EXE
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    PID:3268

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2288-4-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/2288-2-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/2288-16-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/3268-7-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3268-9-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3268-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3268-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3268-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download