isrstealer | c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401

Analysis

max time kernel
100s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
01-10-2022 23:31

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General

Target

c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe
Size

2.2MB
MD5

681dd889c608acd34aec3d5c25ca2cc8
SHA1

e5068c5e5959175c027002f6f2b0208d2de82687
SHA256

c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401
SHA512

fd1fc54e24d64b467d34244275529fd391e1fd28393c1863d3945aec7ac30aed410dae9d7121b1bbe78e207bd312780953f15127db3c17424c15ff38873cab1b
SSDEEP

49152:6wdt1lFQn2Y3xTFgTH3WMycqfS7wL/M+n/M+S:jd3lFQn2Y3xTFgz3xycs/V/I

Score

10^/10

isrstealer collection 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/3652-392-0x0000000000000000-mapping.dmp	family_isrstealer
behavioral2/memory/3652-400-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3652-408-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3652-415-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2124-414-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 1 IoCs

resource	yara_rule
behavioral2/memory/2124-414-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2672-401-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2672-406-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2124-414-0x0000000000400000-0x000000000041F000-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-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4344 set thread context of 3652	4344	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	83
PID 3652 set thread context of 2672	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	84
PID 3652 set thread context of 2124	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	86

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4344	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe
3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4344 wrote to memory of 3652	4344	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	83
PID 4344 wrote to memory of 3652	4344	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	83
PID 4344 wrote to memory of 3652	4344	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	83
PID 4344 wrote to memory of 3652	4344	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	83
PID 4344 wrote to memory of 3652	4344	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	83
PID 4344 wrote to memory of 3652	4344	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	83
PID 4344 wrote to memory of 3652	4344	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	83
PID 4344 wrote to memory of 3652	4344	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	83
PID 3652 wrote to memory of 2672	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	84
PID 3652 wrote to memory of 2672	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	84
PID 3652 wrote to memory of 2672	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	84
PID 3652 wrote to memory of 2672	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	84
PID 3652 wrote to memory of 2672	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	84
PID 3652 wrote to memory of 2672	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	84
PID 3652 wrote to memory of 2672	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	84
PID 3652 wrote to memory of 2672	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	84
PID 3652 wrote to memory of 2124	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	86
PID 3652 wrote to memory of 2124	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	86
PID 3652 wrote to memory of 2124	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	86
PID 3652 wrote to memory of 2124	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	86
PID 3652 wrote to memory of 2124	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	86
PID 3652 wrote to memory of 2124	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	86
PID 3652 wrote to memory of 2124	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	86
PID 3652 wrote to memory of 2124	3652	c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe	86

C:\Users\Admin\AppData\Local\Temp\c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe
"C:\Users\Admin\AppData\Local\Temp\c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4344
- C:\Users\Admin\AppData\Local\Temp\c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3652
- - C:\Users\Admin\AppData\Local\Temp\c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\ZjDI8IvAhL.ini"
    3⤵
    PID:2672
- - C:\Users\Admin\AppData\Local\Temp\c36bc0ca3a90e6cd29de463ff9b54525c18930d1e5a38cfd0f3e366e574eb401.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\dnjaHuaqMH.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:2124

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\ZjDI8IvAhL.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2124-414-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2672-401-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2672-406-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3652-400-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3652-415-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3652-408-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4344-168-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-175-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-143-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-144-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-145-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-146-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-148-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-147-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-149-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-150-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-151-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-152-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-154-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-155-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-156-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-158-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-159-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-160-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-157-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-153-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-161-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-163-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-162-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-164-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-165-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-166-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-167-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-170-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-141-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-169-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-171-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-172-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-174-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-142-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-173-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-176-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-178-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-177-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-179-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-180-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-181-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-182-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-184-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-183-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-185-0x0000000002420000-0x00000000024CE000-memory.dmp

Filesize
696KB

Download
memory/4344-186-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-187-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-188-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-189-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-190-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-191-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-192-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-193-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-194-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-195-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-196-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-197-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-390-0x0000000000400000-0x00000000005BC000-memory.dmp

Filesize
1.7MB

Download
memory/4344-391-0x0000000002420000-0x00000000024CE000-memory.dmp

Filesize
696KB

Download
memory/4344-403-0x0000000000400000-0x00000000005BC000-memory.dmp

Filesize
1.7MB

Download
memory/4344-140-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-139-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-138-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-137-0x0000000000400000-0x00000000005BC000-memory.dmp

Filesize
1.7MB

Download
memory/4344-132-0x0000000000750000-0x000000000080D000-memory.dmp

Filesize
756KB

Download
memory/4344-404-0x0000000002420000-0x00000000024CE000-memory.dmp

Filesize
696KB

Download