isrstealer | 17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f

General

Target

17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe
Size

577KB
MD5

4bb2602bbd399e0107bf087a28435d85
SHA1

81bf0f9957e66e518ae1c186bddcfaef293ed9d4
SHA256

17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f
SHA512

5bbdaac5bfd1b071554ae8e148a2056b551a0edd5323ebb43b53c51b18ac1edd9a303ef6970dca7b655e86af07c7bef897c39a0d5043533d9df72ae25e024eb6

Score

10^/10

isrstealer collection spyware stealer suricata 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
behavioral2/memory/4232-134-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4232-142-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4232-153-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

suricata: ET MALWARE ISRStealer Checkin
suricata: ET MALWARE ISRStealer Checkin
suricata

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3264-150-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3264-151-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3264-152-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/3264-150-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3264-151-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3264-152-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3044-130-0x0000000000400000-0x00000000005DF000-memory.dmp	upx
behavioral2/memory/3044-131-0x0000000000400000-0x00000000005DF000-memory.dmp	upx
behavioral2/memory/4280-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4280-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4280-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4280-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4280-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3264-147-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3264-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3264-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3264-151-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3264-152-0x0000000000400000-0x000000000041F000-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

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3044 set thread context of 4232	3044	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	77
PID 4232 set thread context of 4280	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	78
PID 4232 set thread context of 3264	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	81

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3044 wrote to memory of 4232	3044	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	77
PID 3044 wrote to memory of 4232	3044	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	77
PID 3044 wrote to memory of 4232	3044	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	77
PID 3044 wrote to memory of 4232	3044	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	77
PID 3044 wrote to memory of 4232	3044	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	77
PID 3044 wrote to memory of 4232	3044	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	77
PID 3044 wrote to memory of 4232	3044	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	77
PID 3044 wrote to memory of 4232	3044	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	77
PID 4232 wrote to memory of 4280	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	78
PID 4232 wrote to memory of 4280	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	78
PID 4232 wrote to memory of 4280	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	78
PID 4232 wrote to memory of 4280	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	78
PID 4232 wrote to memory of 4280	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	78
PID 4232 wrote to memory of 4280	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	78
PID 4232 wrote to memory of 4280	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	78
PID 4232 wrote to memory of 4280	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	78
PID 4232 wrote to memory of 3264	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	81
PID 4232 wrote to memory of 3264	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	81
PID 4232 wrote to memory of 3264	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	81
PID 4232 wrote to memory of 3264	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	81
PID 4232 wrote to memory of 3264	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	81
PID 4232 wrote to memory of 3264	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	81
PID 4232 wrote to memory of 3264	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	81
PID 4232 wrote to memory of 3264	4232	17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe	81

C:\Users\Admin\AppData\Local\Temp\17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe
"C:\Users\Admin\AppData\Local\Temp\17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3044
- C:\Users\Admin\AppData\Local\Temp\17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe
  "C:\Users\Admin\AppData\Local\Temp\17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4232
- - C:\Users\Admin\AppData\Local\Temp\17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\kvTygraBjv.ini"
    3⤵
    PID:4280
- - C:\Users\Admin\AppData\Local\Temp\17bae53213efafccaca9971d9b513ec3b33e03e745ed08b75d9ee43b9ca4351f.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\fW9e7BJx6s.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:3264

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

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\kvTygraBjv.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/3044-131-0x0000000000400000-0x00000000005DF000-memory.dmp

Filesize
1.9MB

Download
memory/3044-130-0x0000000000400000-0x00000000005DF000-memory.dmp

Filesize
1.9MB

Download
memory/3264-150-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3264-149-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3264-147-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3264-152-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3264-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4232-153-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4232-142-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4232-134-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4232-133-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4280-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4280-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4280-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4280-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4280-138-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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