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 4 IoCs

resource	yara_rule
behavioral1/memory/1048-59-0x0000000000400000-0x0000000000437000-memory.dmp	family_isrstealer
behavioral1/memory/1048-63-0x0000000000400000-0x0000000000437000-memory.dmp	family_isrstealer
behavioral1/memory/1048-65-0x0000000000401130-mapping.dmp	family_isrstealer
behavioral1/memory/1048-77-0x0000000000400000-0x0000000000437000-memory.dmp	family_isrstealer

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1976-71-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1976-75-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1976-76-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1976-78-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1976-79-0x0000000000400000-0x0000000000453000-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 1784 set thread context of 1048	1784	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	29
PID 1048 set thread context of 1976	1048	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	30

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1048	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1784 wrote to memory of 1676	1784	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	28
PID 1784 wrote to memory of 1676	1784	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	28
PID 1784 wrote to memory of 1676	1784	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	28
PID 1784 wrote to memory of 1676	1784	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	28
PID 1784 wrote to memory of 1048	1784	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	29
PID 1784 wrote to memory of 1048	1784	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	29
PID 1784 wrote to memory of 1048	1784	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	29
PID 1784 wrote to memory of 1048	1784	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	29
PID 1784 wrote to memory of 1048	1784	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	29
PID 1784 wrote to memory of 1048	1784	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	29
PID 1784 wrote to memory of 1048	1784	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	29
PID 1784 wrote to memory of 1048	1784	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	29
PID 1048 wrote to memory of 1976	1048	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	30
PID 1048 wrote to memory of 1976	1048	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	30
PID 1048 wrote to memory of 1976	1048	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	30
PID 1048 wrote to memory of 1976	1048	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	30
PID 1048 wrote to memory of 1976	1048	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	30
PID 1048 wrote to memory of 1976	1048	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	30
PID 1048 wrote to memory of 1976	1048	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	30
PID 1048 wrote to memory of 1976	1048	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	30
PID 1048 wrote to memory of 1976	1048	136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe	30

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:1784
- C:\Users\Admin\AppData\Local\Temp\136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe
  "C:\Users\Admin\AppData\Local\Temp\136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe"
  2⤵
  PID:1676
- 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:1048
- - C:\Users\Admin\AppData\Local\Temp\136002d7ae22998e809213358e95527a7f4abfd5f15cb86f9e2dfc6f2b5d3c7d.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    PID:1976

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

memory/1048-77-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/1048-57-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/1048-59-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/1048-56-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/1048-63-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/1784-55-0x00000000742E0000-0x000000007488B000-memory.dmp

Filesize
5.7MB

Download
memory/1784-68-0x00000000742E0000-0x000000007488B000-memory.dmp

Filesize
5.7MB

Download
memory/1784-54-0x00000000753C1000-0x00000000753C3000-memory.dmp

Filesize
8KB

Download
memory/1976-71-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1976-75-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1976-76-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1976-78-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1976-79-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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