isrstealer | a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae

General

Target

a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe
Size

538KB
MD5

580aaadbd22f17364744c521d1e80010
SHA1

6e7ac3387d91a4b80ee4ef0d2ebb67d510e4f871
SHA256

a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae
SHA512

10a3d31b2dd7ac4d1df388fb60726becbeba970b1fd03e04bf5dea012c14b451e60f2b864fe6213f1f6ae1520f03e4c847f8ccc7ae717ce37ab700d19573ab97
SSDEEP

12288:jbEW3uPGfUkzQsaSZ4hOWHcyvz2Z/ohGFN:j4PBs7KsWHcms/kGF

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/308-136-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/308-146-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral2/memory/308-148-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3404-132-0x0000000000400000-0x00000000005AC000-memory.dmp	upx
behavioral2/memory/3404-137-0x0000000000400000-0x00000000005AC000-memory.dmp	upx
behavioral2/memory/1180-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1180-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1180-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1180-145-0x0000000000400000-0x0000000000453000-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 3404 set thread context of 308	3404	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	82
PID 308 set thread context of 1180	308	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	83

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
308	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3404 wrote to memory of 308	3404	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	82
PID 3404 wrote to memory of 308	3404	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	82
PID 3404 wrote to memory of 308	3404	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	82
PID 3404 wrote to memory of 308	3404	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	82
PID 3404 wrote to memory of 308	3404	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	82
PID 3404 wrote to memory of 308	3404	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	82
PID 3404 wrote to memory of 308	3404	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	82
PID 3404 wrote to memory of 308	3404	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	82
PID 308 wrote to memory of 1180	308	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	83
PID 308 wrote to memory of 1180	308	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	83
PID 308 wrote to memory of 1180	308	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	83
PID 308 wrote to memory of 1180	308	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	83
PID 308 wrote to memory of 1180	308	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	83
PID 308 wrote to memory of 1180	308	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	83
PID 308 wrote to memory of 1180	308	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	83
PID 308 wrote to memory of 1180	308	a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe	83

C:\Users\Admin\AppData\Local\Temp\a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe
"C:\Users\Admin\AppData\Local\Temp\a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3404
- C:\Users\Admin\AppData\Local\Temp\a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe
  "C:\Users\Admin\AppData\Local\Temp\a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:308
- - C:\Users\Admin\AppData\Local\Temp\a3dc490ec02ee2f59cac822c556b67206f05856e0e50479cbd3e496d705a47ae.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\XUtIxFmOdi.ini"
    3⤵
    PID:1180

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\XUtIxFmOdi.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/308-146-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/308-136-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/308-135-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/308-148-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1180-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1180-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1180-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1180-145-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3404-137-0x0000000000400000-0x00000000005AC000-memory.dmp

Filesize
1.7MB

Download
memory/3404-132-0x0000000000400000-0x00000000005AC000-memory.dmp

Filesize
1.7MB

Download

Analysis

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