isrstealer | 2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144

General

Target

2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe
Size

1.2MB
MD5

0861b8194173e70253c81514cb128479
SHA1

9b71ded7d30aa9247a255e09e8b618a902736a16
SHA256

2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144
SHA512

7996a7c0066729628e9a16c8c63b41f341bf941f5cb2be7511d364ca13386a54ae1230edbe6d4e738c3938d0f8bc2d09239960fa5f941693b9ccbb7906092ffd
SSDEEP

24576:uRmJkcoQricOIQxiZY1iaCtPmEJeY5dSMys5+dVbsjHIAcXO01ZoS96QIdntiYyE:7JZoQrbTFZY1iaC55HdS1s5+W

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 3 IoCs

resource	yara_rule
behavioral1/memory/1524-63-0x0000000000400000-0x000000000043B000-memory.dmp	family_isrstealer
behavioral1/memory/1524-72-0x0000000000400000-0x000000000043B000-memory.dmp	family_isrstealer
behavioral1/memory/1524-76-0x0000000000400000-0x000000000043B000-memory.dmp	family_isrstealer

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1524-56-0x0000000000400000-0x000000000043B000-memory.dmp	upx
behavioral1/memory/1524-58-0x0000000000400000-0x000000000043B000-memory.dmp	upx
behavioral1/memory/1524-59-0x0000000000400000-0x000000000043B000-memory.dmp	upx
behavioral1/memory/1524-62-0x0000000000400000-0x000000000043B000-memory.dmp	upx
behavioral1/memory/1524-63-0x0000000000400000-0x000000000043B000-memory.dmp	upx
behavioral1/memory/1136-66-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1136-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1136-71-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1524-72-0x0000000000400000-0x000000000043B000-memory.dmp	upx
behavioral1/memory/1136-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1136-74-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1524-76-0x0000000000400000-0x000000000043B000-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 2040 set thread context of 1524	2040	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	28
PID 1524 set thread context of 1136	1524	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	29

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

System Information Discovery
T1082

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
2040	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe
2040	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe
2040	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
2040	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe
2040	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe
2040	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1524	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2040 wrote to memory of 1524	2040	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	28
PID 2040 wrote to memory of 1524	2040	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	28
PID 2040 wrote to memory of 1524	2040	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	28
PID 2040 wrote to memory of 1524	2040	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	28
PID 2040 wrote to memory of 1524	2040	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	28
PID 2040 wrote to memory of 1524	2040	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	28
PID 2040 wrote to memory of 1524	2040	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	28
PID 2040 wrote to memory of 1524	2040	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	28
PID 1524 wrote to memory of 1136	1524	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	29
PID 1524 wrote to memory of 1136	1524	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	29
PID 1524 wrote to memory of 1136	1524	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	29
PID 1524 wrote to memory of 1136	1524	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	29
PID 1524 wrote to memory of 1136	1524	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	29
PID 1524 wrote to memory of 1136	1524	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	29
PID 1524 wrote to memory of 1136	1524	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	29
PID 1524 wrote to memory of 1136	1524	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	29
PID 1524 wrote to memory of 1136	1524	2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe	29

C:\Users\Admin\AppData\Local\Temp\2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe
"C:\Users\Admin\AppData\Local\Temp\2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2040
- C:\Users\Admin\AppData\Local\Temp\2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe
  "C:\Users\Admin\AppData\Local\Temp\2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1524
- - C:\Users\Admin\AppData\Local\Temp\2099396b29275eb0815d92fba16b9de125d81cdd29e0c7602c743f1b0127d144.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\K1WhsA1iUX.ini"
    3⤵
    PID:1136

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

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\K1WhsA1iUX.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1136-66-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1136-74-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1136-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1136-71-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1136-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1524-59-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/1524-63-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/1524-62-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/1524-72-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/1524-58-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/1524-56-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/1524-55-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/1524-76-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/2040-54-0x00000000762F1000-0x00000000762F3000-memory.dmp

Filesize
8KB

Download

Analysis

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