isrstealer | 817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5

General

Target

817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe
Size

523KB
MD5

6e55e6c0e8c4e92cfc8ad1d2021f6900
SHA1

0ba19a84541e1f7b318b37a77ee3d658bdc38349
SHA256

817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5
SHA512

3f0f3fcf0e962bdf2e4e2ed36db9c761da414e25ded312be9b4a69cdc151b00d78b546da9be9bbf6850e05a0c805532460231f1d35a1ecd3b9c9ef5dfd686482
SSDEEP

12288:3gYM/npGAHfBjfM1Uk4J7On32d0C8JShh459:WjHfBYUm3vCG59

Score

10^/10

isrstealer persistence 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
behavioral2/memory/1264-135-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1264-137-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/824-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/824-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/824-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/824-145-0x0000000000400000-0x0000000000453000-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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Java = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Java.exe"	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4148 set thread context of 1264	4148	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	81
PID 1264 set thread context of 824	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	82
PID 1264 set thread context of 1492	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	85

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3436	1492	WerFault.exe	85

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4148	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4148 wrote to memory of 1264	4148	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	81
PID 4148 wrote to memory of 1264	4148	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	81
PID 4148 wrote to memory of 1264	4148	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	81
PID 4148 wrote to memory of 1264	4148	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	81
PID 4148 wrote to memory of 1264	4148	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	81
PID 4148 wrote to memory of 1264	4148	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	81
PID 4148 wrote to memory of 1264	4148	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	81
PID 4148 wrote to memory of 1264	4148	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	81
PID 1264 wrote to memory of 824	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	82
PID 1264 wrote to memory of 824	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	82
PID 1264 wrote to memory of 824	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	82
PID 1264 wrote to memory of 824	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	82
PID 1264 wrote to memory of 824	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	82
PID 1264 wrote to memory of 824	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	82
PID 1264 wrote to memory of 824	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	82
PID 1264 wrote to memory of 824	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	82
PID 1264 wrote to memory of 1492	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	85
PID 1264 wrote to memory of 1492	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	85
PID 1264 wrote to memory of 1492	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	85
PID 1264 wrote to memory of 1492	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	85
PID 1264 wrote to memory of 1492	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	85
PID 1264 wrote to memory of 1492	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	85
PID 1264 wrote to memory of 1492	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	85
PID 1264 wrote to memory of 1492	1264	817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe	85

C:\Users\Admin\AppData\Local\Temp\817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe
"C:\Users\Admin\AppData\Local\Temp\817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4148
- C:\Users\Admin\AppData\Local\Temp\817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe
  C:\Users\Admin\AppData\Local\Temp\817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1264
- - C:\Users\Admin\AppData\Local\Temp\817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\qXs5RGMtT9.ini"
    3⤵
    PID:824
- - C:\Users\Admin\AppData\Local\Temp\817141474289ce2d8bea5d9015652c18681069e239db5d56e58bf0c3e4c339d5.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\tbbCp5ZLVv.ini"
    3⤵
    PID:1492
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1492 -s 80
      4⤵
      Program crash
      PID:3436

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 1492 -ip 1492
1⤵
PID:4520

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

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\qXs5RGMtT9.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/824-145-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/824-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/824-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/824-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1264-135-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1264-137-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4148-132-0x0000000075300000-0x00000000758B1000-memory.dmp

Filesize
5.7MB

Download
memory/4148-146-0x0000000075300000-0x00000000758B1000-memory.dmp

Filesize
5.7MB

Download
memory/4148-133-0x0000000075300000-0x00000000758B1000-memory.dmp

Filesize
5.7MB

Download

Analysis

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