isrstealer | 482324cd99084ad055a2f3d7b7f6126939482ecfdeb9f9f53c657148b7f4b23b

General

Target

482324cd99084ad055a2f3d7b7f6126939482ecfdeb9f9f53c657148b7f4b23b.exe
Size

173KB
MD5

838c7f66c15a84419510d9642f46ab41
SHA1

094b7c7d3b45af32fa227adcc074cf250b85f4bd
SHA256

482324cd99084ad055a2f3d7b7f6126939482ecfdeb9f9f53c657148b7f4b23b
SHA512

d80620e812277adeba5f1075fad701e0f299bfcca79f787cb2e595e6964e9d44aafc291ed6c9fc2961d0136820a3b9f05176db86bcd30dc551057f4fdf93cc38
SSDEEP

3072:uVzKxDfE3Oh9EdLQAQnOLx5X7pl3MDVZdx8udG0206hojLldWafruJgHPQkout:dSuCLdQOdgZdWup206KvldvruSVoS

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 2 IoCs

resource	yara_rule
behavioral1/memory/1184-62-0x0000000000400000-0x0000000000434000-memory.dmp	family_isrstealer
behavioral1/memory/1184-68-0x0000000000400000-0x0000000000434000-memory.dmp	family_isrstealer

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2032-56-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral1/memory/2032-60-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral1/memory/2032-61-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral1/memory/1184-62-0x0000000000400000-0x0000000000434000-memory.dmp	upx
behavioral1/memory/2032-64-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral1/memory/2032-65-0x0000000000400000-0x0000000000454000-memory.dmp	upx
behavioral1/memory/1184-68-0x0000000000400000-0x0000000000434000-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 1 IoCs

description	pid	Process	procid_target
PID 1184 set thread context of 2032	1184	482324cd99084ad055a2f3d7b7f6126939482ecfdeb9f9f53c657148b7f4b23b.exe	27

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1184	482324cd99084ad055a2f3d7b7f6126939482ecfdeb9f9f53c657148b7f4b23b.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1184 wrote to memory of 2032	1184	482324cd99084ad055a2f3d7b7f6126939482ecfdeb9f9f53c657148b7f4b23b.exe	27
PID 1184 wrote to memory of 2032	1184	482324cd99084ad055a2f3d7b7f6126939482ecfdeb9f9f53c657148b7f4b23b.exe	27
PID 1184 wrote to memory of 2032	1184	482324cd99084ad055a2f3d7b7f6126939482ecfdeb9f9f53c657148b7f4b23b.exe	27
PID 1184 wrote to memory of 2032	1184	482324cd99084ad055a2f3d7b7f6126939482ecfdeb9f9f53c657148b7f4b23b.exe	27
PID 1184 wrote to memory of 2032	1184	482324cd99084ad055a2f3d7b7f6126939482ecfdeb9f9f53c657148b7f4b23b.exe	27
PID 1184 wrote to memory of 2032	1184	482324cd99084ad055a2f3d7b7f6126939482ecfdeb9f9f53c657148b7f4b23b.exe	27
PID 1184 wrote to memory of 2032	1184	482324cd99084ad055a2f3d7b7f6126939482ecfdeb9f9f53c657148b7f4b23b.exe	27
PID 1184 wrote to memory of 2032	1184	482324cd99084ad055a2f3d7b7f6126939482ecfdeb9f9f53c657148b7f4b23b.exe	27
PID 1184 wrote to memory of 2032	1184	482324cd99084ad055a2f3d7b7f6126939482ecfdeb9f9f53c657148b7f4b23b.exe	27

C:\Users\Admin\AppData\Local\Temp\482324cd99084ad055a2f3d7b7f6126939482ecfdeb9f9f53c657148b7f4b23b.exe
"C:\Users\Admin\AppData\Local\Temp\482324cd99084ad055a2f3d7b7f6126939482ecfdeb9f9f53c657148b7f4b23b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1184
- C:\Users\Admin\AppData\Local\Temp\482324cd99084ad055a2f3d7b7f6126939482ecfdeb9f9f53c657148b7f4b23b.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\oi2RqgJNzf.ini"
  2⤵
  PID:2032

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\oi2RqgJNzf.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1184-62-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/1184-63-0x0000000000270000-0x00000000002A4000-memory.dmp

Filesize
208KB

Download
memory/1184-68-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2032-56-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2032-59-0x0000000075A11000-0x0000000075A13000-memory.dmp

Filesize
8KB

Download
memory/2032-60-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2032-61-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2032-64-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download
memory/2032-65-0x0000000000400000-0x0000000000454000-memory.dmp

Filesize
336KB

Download

Analysis

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