isrstealer | 43d9889edc690d01f44f1f3cf5357311d4e0336c12f486f0aeb993e8aa49f032

General

Target

649d5d670230a26cbf5182f6da9f94c3.exe
Size

372KB
MD5

649d5d670230a26cbf5182f6da9f94c3
SHA1

7323a75ecd52b053c8aec76aa1098d1825a0572b
SHA256

43d9889edc690d01f44f1f3cf5357311d4e0336c12f486f0aeb993e8aa49f032
SHA512

b2ff31006c7cb48e42efff97da5e46e9cf6573b3232ba51555659f396a71f94364b636d31f3d1344e22491814517d93c9454c8abc98a4a17cb5220b41a875047
SSDEEP

6144:hxEGgCLi6Ji0wV8w+LOGemcCMicZ6Oyk6yoJrqjitc0B9uSW01CK47CCxI22U63B:D5Wgj9LW01CDCuI2PTh0gg

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
behavioral1/memory/2516-6-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2516-10-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2516-16-0x0000000000400000-0x0000000000435000-memory.dmp	family_isrstealer
behavioral1/memory/2516-25-0x0000000000400000-0x0000000000435000-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
behavioral1/memory/1256-15-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1256-18-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1256-20-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1256-19-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1256-22-0x0000000000400000-0x0000000000453000-memory.dmp	upx

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2500 set thread context of 2516	2500	649d5d670230a26cbf5182f6da9f94c3.exe	28
PID 2516 set thread context of 1256	2516	649d5d670230a26cbf5182f6da9f94c3.exe	29

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2500	649d5d670230a26cbf5182f6da9f94c3.exe
2516	649d5d670230a26cbf5182f6da9f94c3.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2500 wrote to memory of 2516	2500	649d5d670230a26cbf5182f6da9f94c3.exe	28
PID 2500 wrote to memory of 2516	2500	649d5d670230a26cbf5182f6da9f94c3.exe	28
PID 2500 wrote to memory of 2516	2500	649d5d670230a26cbf5182f6da9f94c3.exe	28
PID 2500 wrote to memory of 2516	2500	649d5d670230a26cbf5182f6da9f94c3.exe	28
PID 2500 wrote to memory of 2516	2500	649d5d670230a26cbf5182f6da9f94c3.exe	28
PID 2500 wrote to memory of 2516	2500	649d5d670230a26cbf5182f6da9f94c3.exe	28
PID 2500 wrote to memory of 2516	2500	649d5d670230a26cbf5182f6da9f94c3.exe	28
PID 2500 wrote to memory of 2516	2500	649d5d670230a26cbf5182f6da9f94c3.exe	28
PID 2516 wrote to memory of 1256	2516	649d5d670230a26cbf5182f6da9f94c3.exe	29
PID 2516 wrote to memory of 1256	2516	649d5d670230a26cbf5182f6da9f94c3.exe	29
PID 2516 wrote to memory of 1256	2516	649d5d670230a26cbf5182f6da9f94c3.exe	29
PID 2516 wrote to memory of 1256	2516	649d5d670230a26cbf5182f6da9f94c3.exe	29
PID 2516 wrote to memory of 1256	2516	649d5d670230a26cbf5182f6da9f94c3.exe	29
PID 2516 wrote to memory of 1256	2516	649d5d670230a26cbf5182f6da9f94c3.exe	29
PID 2516 wrote to memory of 1256	2516	649d5d670230a26cbf5182f6da9f94c3.exe	29
PID 2516 wrote to memory of 1256	2516	649d5d670230a26cbf5182f6da9f94c3.exe	29
PID 2516 wrote to memory of 1256	2516	649d5d670230a26cbf5182f6da9f94c3.exe	29

C:\Users\Admin\AppData\Local\Temp\649d5d670230a26cbf5182f6da9f94c3.exe
"C:\Users\Admin\AppData\Local\Temp\649d5d670230a26cbf5182f6da9f94c3.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2500
- C:\Users\Admin\AppData\Local\Temp\649d5d670230a26cbf5182f6da9f94c3.exe
  "C:\Users\Admin\AppData\Local\Temp\649d5d670230a26cbf5182f6da9f94c3.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2516
- - C:\Users\Admin\AppData\Local\Temp\649d5d670230a26cbf5182f6da9f94c3.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\gniZsEbgWn.ini"
    3⤵
    PID:1256

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

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\gniZsEbgWn.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1256-18-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1256-22-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1256-19-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1256-20-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1256-15-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2516-8-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2516-16-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2516-10-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2516-2-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2516-6-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2516-4-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2516-25-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download

Analysis

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