isrstealer | 136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d

General

Target

136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe
Size

536KB
MD5

1fdb559bbfdc8d360405d961d6d6b37c
SHA1

25175cfd49045e96450c4820f613a27521c49ae0
SHA256

136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d
SHA512

6b5f87f559030278952d8efe9993ca9fda098a740f9de945f71d7669494c2399c8d18905eea0c3c160efc3cd7c4d1153c9e08e0078c2cb66b9ba90d0f9c24375
SSDEEP

12288:1XW2OwDqUPHpsLxlQ2EbItjTXk54nUJH:Fhi4aNlQ9bIjTU54i

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 6 IoCs

resource	yara_rule
behavioral2/memory/4412-132-0x0000000000000000-mapping.dmp	family_isrstealer
behavioral2/memory/4412-134-0x0000000000400000-0x0000000000437000-memory.dmp	family_isrstealer
behavioral2/memory/4412-136-0x0000000000400000-0x0000000000437000-memory.dmp	family_isrstealer
behavioral2/memory/4412-139-0x0000000000400000-0x0000000000437000-memory.dmp	family_isrstealer
behavioral2/memory/4412-149-0x0000000000400000-0x0000000000437000-memory.dmp	family_isrstealer
behavioral2/memory/4412-151-0x0000000000400000-0x0000000000437000-memory.dmp	family_isrstealer

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1652-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1652-146-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1652-147-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1652-148-0x0000000000400000-0x0000000000453000-memory.dmp	upx

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
T1081

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1492 set thread context of 4412	1492	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	81
PID 4412 set thread context of 1652	4412	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	82

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4412	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1492 wrote to memory of 4412	1492	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	81
PID 1492 wrote to memory of 4412	1492	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	81
PID 1492 wrote to memory of 4412	1492	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	81
PID 1492 wrote to memory of 4412	1492	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	81
PID 1492 wrote to memory of 4412	1492	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	81
PID 1492 wrote to memory of 4412	1492	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	81
PID 1492 wrote to memory of 4412	1492	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	81
PID 1492 wrote to memory of 4412	1492	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	81
PID 4412 wrote to memory of 1652	4412	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	82
PID 4412 wrote to memory of 1652	4412	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	82
PID 4412 wrote to memory of 1652	4412	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	82
PID 4412 wrote to memory of 1652	4412	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	82
PID 4412 wrote to memory of 1652	4412	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	82
PID 4412 wrote to memory of 1652	4412	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	82
PID 4412 wrote to memory of 1652	4412	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	82
PID 4412 wrote to memory of 1652	4412	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	82

C:\Users\Admin\AppData\Local\Temp\136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe
"C:\Users\Admin\AppData\Local\Temp\136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1492
- C:\Users\Admin\AppData\Local\Temp\136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe
  "C:\Users\Admin\AppData\Local\Temp\136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4412
- - C:\Users\Admin\AppData\Local\Temp\136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    PID:1652

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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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/1492-142-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download
memory/1492-133-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download
memory/1652-147-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1652-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1652-146-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1652-148-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4412-139-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/4412-136-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/4412-149-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/4412-134-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/4412-151-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download

Analysis

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