isrstealer | 69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823

General

Target

69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe
Size

280KB
MD5

93efd20e49f88045b85f88910ebba437
SHA1

3f60ee0982c951d2ebc56b5d5d999edba60585b3
SHA256

69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823
SHA512

0bf9193715260457ea94f6191802db00fed371402fd20c054a98b02afa72ef814bc0908a731c0777d0ded3b05743e9f7204f389621023745cdd581e8ce97cd3d
SSDEEP

6144:LtyZPrwe7oZzR9my/pdMgS6pAGwpCWvQ+YnC3H/LkySe+37:RBzKy/pdM4pS0Wv9YnC3fLkBeu

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
behavioral2/memory/3424-132-0x0000000000000000-mapping.dmp	family_isrstealer
behavioral2/memory/3424-133-0x0000000000400000-0x000000000043B000-memory.dmp	family_isrstealer
behavioral2/memory/3424-142-0x0000000000400000-0x000000000043B000-memory.dmp	family_isrstealer
behavioral2/memory/3424-146-0x0000000000400000-0x000000000043B000-memory.dmp	family_isrstealer

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1704-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1704-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1704-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1704-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1704-144-0x0000000000400000-0x0000000000453000-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 1120 set thread context of 3424	1120	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe	81
PID 3424 set thread context of 1704	3424	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe	82

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1120	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe
1120	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe
3424	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1120 wrote to memory of 3424	1120	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe	81
PID 1120 wrote to memory of 3424	1120	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe	81
PID 1120 wrote to memory of 3424	1120	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe	81
PID 1120 wrote to memory of 3424	1120	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe	81
PID 1120 wrote to memory of 3424	1120	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe	81
PID 1120 wrote to memory of 3424	1120	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe	81
PID 1120 wrote to memory of 3424	1120	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe	81
PID 3424 wrote to memory of 1704	3424	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe	82
PID 3424 wrote to memory of 1704	3424	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe	82
PID 3424 wrote to memory of 1704	3424	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe	82
PID 3424 wrote to memory of 1704	3424	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe	82
PID 3424 wrote to memory of 1704	3424	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe	82
PID 3424 wrote to memory of 1704	3424	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe	82
PID 3424 wrote to memory of 1704	3424	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe	82
PID 3424 wrote to memory of 1704	3424	69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe	82

C:\Users\Admin\AppData\Local\Temp\69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe
"C:\Users\Admin\AppData\Local\Temp\69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1120
- C:\Users\Admin\AppData\Local\Temp\69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe
  C:\Users\Admin\AppData\Local\Temp\69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3424
- - C:\Users\Admin\AppData\Local\Temp\69d673de76e185889cec1767635953f3c11cfe87479485c99e8c4c6105faf823.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\pyN5vSpF4E.ini"
    3⤵
    PID:1704

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\pyN5vSpF4E.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1704-138-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1704-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1704-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1704-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1704-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3424-133-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/3424-142-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/3424-146-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download

Analysis

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