isrstealer | 5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147

General

Target

5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe
Size

1.1MB
MD5

312322ba92d80c13f90c392910b61aa6
SHA1

0e8393aca634c54c559fda2224387724eaab7823
SHA256

5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147
SHA512

94c72d5786158c13f6a7f73f0b683402e9ae0d3ffafb21bed5756d381e7c0d1831398a227719f66d4438c9568993994257ca5b47001c54ffa797b59438c4bf94
SSDEEP

24576:ALmJkcoQricOIQxiZY1ia0ZnLhE7uU3lzKR0o30o9:PJZoQrbTFZY1ia0ZndE7lSLl

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/1972-0-0x0000000000400000-0x0000000000464000-memory.dmp	family_isrstealer
behavioral2/memory/1972-2-0x0000000000400000-0x0000000000464000-memory.dmp	family_isrstealer
behavioral2/memory/1972-14-0x0000000000400000-0x0000000000464000-memory.dmp	family_isrstealer
behavioral2/memory/1972-16-0x0000000000400000-0x0000000000464000-memory.dmp	family_isrstealer

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
T1552.001

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1324-5-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1324-7-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1324-9-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1324-8-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1324-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4376 set thread context of 1972	4376	5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe	83
PID 1972 set thread context of 1324	1972	5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe	84

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1972	5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4376 wrote to memory of 1972	4376	5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe	83
PID 4376 wrote to memory of 1972	4376	5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe	83
PID 4376 wrote to memory of 1972	4376	5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe	83
PID 4376 wrote to memory of 1972	4376	5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe	83
PID 4376 wrote to memory of 1972	4376	5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe	83
PID 4376 wrote to memory of 1972	4376	5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe	83
PID 1972 wrote to memory of 1324	1972	5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe	84
PID 1972 wrote to memory of 1324	1972	5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe	84
PID 1972 wrote to memory of 1324	1972	5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe	84
PID 1972 wrote to memory of 1324	1972	5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe	84
PID 1972 wrote to memory of 1324	1972	5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe	84
PID 1972 wrote to memory of 1324	1972	5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe	84
PID 1972 wrote to memory of 1324	1972	5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe	84
PID 1972 wrote to memory of 1324	1972	5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe	84

C:\Users\Admin\AppData\Local\Temp\5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe
"C:\Users\Admin\AppData\Local\Temp\5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4376
- C:\Users\Admin\AppData\Local\Temp\5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe
  "C:\Users\Admin\AppData\Local\Temp\5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1972
- - C:\Users\Admin\AppData\Local\Temp\5f23a90128fbb7b93efe0458b47a0b8f30f724bf43c462306c45e58f0d09e147.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\jzB9KT8H6s.ini"
    3⤵
    PID:1324

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

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\jzB9KT8H6s.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1324-5-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1324-7-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1324-9-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1324-8-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1324-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1972-0-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/1972-2-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/1972-14-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/1972-16-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download

Analysis

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