isrstealer | b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913

General

Target

b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe
Size

288KB
MD5

7e83a1c30ce7b96bb09d5467c52f9a9f
SHA1

9be13b739e021499ffe2e9b0a27953d98efb07ea
SHA256

b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913
SHA512

9f591a305479b906bad1e578822770675c1d41b75a34a7e66b566541792904fa4eb0cd7aa3af4fa8073c910acf2077ae390a9a0a00bf9b0a91ca6e6079f10b9f
SSDEEP

3072:7/yRdz/A331PSbKAYxKYQ9vfyqtDkaOt3OD6mikkDaUpfTDMBh8QZMc8YbMzilXp:WEn1S+wYQ9aicOfikk2sohb+ilZ

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 5 IoCs

resource	yara_rule
behavioral1/memory/1760-66-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1760-69-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1760-68-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1760-79-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/1760-84-0x0000000000400000-0x0000000000435000-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/544-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/544-77-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/544-78-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/544-80-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/544-81-0x0000000000400000-0x0000000000453000-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 2016 set thread context of 1760	2016	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	27
PID 1760 set thread context of 544	1760	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	28

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2016	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe
1760	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2016 wrote to memory of 1760	2016	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	27
PID 2016 wrote to memory of 1760	2016	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	27
PID 2016 wrote to memory of 1760	2016	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	27
PID 2016 wrote to memory of 1760	2016	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	27
PID 2016 wrote to memory of 1760	2016	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	27
PID 2016 wrote to memory of 1760	2016	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	27
PID 2016 wrote to memory of 1760	2016	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	27
PID 2016 wrote to memory of 1760	2016	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	27
PID 1760 wrote to memory of 544	1760	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	28
PID 1760 wrote to memory of 544	1760	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	28
PID 1760 wrote to memory of 544	1760	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	28
PID 1760 wrote to memory of 544	1760	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	28
PID 1760 wrote to memory of 544	1760	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	28
PID 1760 wrote to memory of 544	1760	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	28
PID 1760 wrote to memory of 544	1760	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	28
PID 1760 wrote to memory of 544	1760	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	28
PID 1760 wrote to memory of 544	1760	b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe	28

C:\Users\Admin\AppData\Local\Temp\b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe
"C:\Users\Admin\AppData\Local\Temp\b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2016
- C:\Users\Admin\AppData\Local\Temp\b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe
  "C:\Users\Admin\AppData\Local\Temp\b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1760
- - C:\Users\Admin\AppData\Local\Temp\b7ebe81bae15e93f14e32432dc1f135f4ba62de4e37cd765ea698e5c789fa913.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\BU589craiN.ini"
    3⤵
    PID:544

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\BU589craiN.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/544-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/544-81-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/544-80-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/544-78-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/544-77-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/544-76-0x00000000757A1000-0x00000000757A3000-memory.dmp

Filesize
8KB

Download
memory/1760-63-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1760-64-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1760-66-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1760-84-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1760-68-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1760-79-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2016-61-0x00000000002A0000-0x00000000002B0000-memory.dmp

Filesize
64KB

Download
memory/2016-60-0x0000000000290000-0x00000000002A0000-memory.dmp

Filesize
64KB

Download
memory/2016-59-0x0000000000280000-0x0000000000290000-memory.dmp

Filesize
64KB

Download
memory/2016-58-0x0000000000270000-0x0000000000280000-memory.dmp

Filesize
64KB

Download
memory/2016-62-0x00000000002B0000-0x00000000002C0000-memory.dmp

Filesize
64KB

Download
memory/2016-56-0x0000000000250000-0x0000000000260000-memory.dmp

Filesize
64KB

Download
memory/2016-57-0x0000000000260000-0x0000000000270000-memory.dmp

Filesize
64KB

Download
memory/2016-54-0x0000000000220000-0x0000000000230000-memory.dmp

Filesize
64KB

Download
memory/2016-55-0x0000000000230000-0x0000000000240000-memory.dmp

Filesize
64KB

Download

Analysis

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