isrstealer | 8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f

General

Target

8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe
Size

268KB
MD5

f587c9d372b00a1fd6318be8e77e3ce9
SHA1

5d60ceb10db1f99499d6ef3df167887bcbb4d5b5
SHA256

8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f
SHA512

22adf8cceac165eebab521ea645d1148dac52a79e016c914d7b559ec732e0a588dc06999f6a577a832e2fb8e18a12a1418b966bc28b66c623284b56f8162b659
SSDEEP

6144:+aYjV9tL8n1S/v05LHr++1V09sNsMyzHMD6RupUcMW/1Xdb05s3CUofk:+aSftw2cDYsNsTIWg/TYaCI

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/4288-134-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/4288-136-0x0000000000400000-0x0000000000432000-memory.dmp	family_isrstealer
behavioral2/memory/4288-146-0x0000000000400000-0x0000000000432000-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/4544-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4544-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4544-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4544-144-0x0000000000400000-0x0000000000453000-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 5044 set thread context of 4288	5044	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	79
PID 4288 set thread context of 4544	4288	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	80

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4288	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 5044 wrote to memory of 4288	5044	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	79
PID 5044 wrote to memory of 4288	5044	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	79
PID 5044 wrote to memory of 4288	5044	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	79
PID 5044 wrote to memory of 4288	5044	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	79
PID 5044 wrote to memory of 4288	5044	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	79
PID 5044 wrote to memory of 4288	5044	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	79
PID 5044 wrote to memory of 4288	5044	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	79
PID 5044 wrote to memory of 4288	5044	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	79
PID 4288 wrote to memory of 4544	4288	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	80
PID 4288 wrote to memory of 4544	4288	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	80
PID 4288 wrote to memory of 4544	4288	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	80
PID 4288 wrote to memory of 4544	4288	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	80
PID 4288 wrote to memory of 4544	4288	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	80
PID 4288 wrote to memory of 4544	4288	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	80
PID 4288 wrote to memory of 4544	4288	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	80
PID 4288 wrote to memory of 4544	4288	8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe	80

C:\Users\Admin\AppData\Local\Temp\8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe
"C:\Users\Admin\AppData\Local\Temp\8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5044
- C:\Users\Admin\AppData\Local\Temp\8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe
  C:\Users\Admin\AppData\Local\Temp\8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4288
- - C:\Users\Admin\AppData\Local\Temp\8a7a795d4cfe15d2eed3c45041a8b4ae99213e0bd8e4b2e06629dd761916ae0f.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"
    3⤵
    PID:4544

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/4288-134-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/4288-136-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/4288-146-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/4544-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4544-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4544-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4544-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5044-132-0x0000000000030000-0x0000000000036000-memory.dmp

Filesize
24KB

Download

Analysis

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