isrstealer | 728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7

General

Target

728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.exe
Size

532KB
MD5

11a5e59937d2b9a97d4c1e78d4a5d506
SHA1

b2e3c3099cf8503d476576919d001ac433f844d7
SHA256

728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7
SHA512

c8fc204a06926a0482538b685984c75dbfcd998a61a8ac10b7e215e2e46834ceb8555cc6b5672bcc683164192b849ab0085fde95b1625846fa16c3d79302aae9
SSDEEP

12288:MZpT8RlSWLIRec4tbizP9Ef49idGUrSPRxv1/F:mpT8RlSWLIRec4tbizVEf40rSXv1/F

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 6 IoCs

resource	yara_rule
behavioral1/memory/2040-59-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2040-62-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/2040-61-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2040-72-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2040-84-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/2040-85-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1584-82-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1584-83-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/1584-82-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1584-83-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/460-66-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/460-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/460-71-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/460-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/460-74-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1584-77-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1584-81-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1584-82-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1584-83-0x0000000000400000-0x000000000041F000-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-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2028 set thread context of 2040	2028	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.exe	28
PID 2040 set thread context of 460	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	29
PID 2040 set thread context of 1584	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	32

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2028	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.exe
2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2028 wrote to memory of 2040	2028	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.exe	28
PID 2028 wrote to memory of 2040	2028	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.exe	28
PID 2028 wrote to memory of 2040	2028	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.exe	28
PID 2028 wrote to memory of 2040	2028	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.exe	28
PID 2028 wrote to memory of 2040	2028	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.exe	28
PID 2028 wrote to memory of 2040	2028	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.exe	28
PID 2028 wrote to memory of 2040	2028	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.exe	28
PID 2028 wrote to memory of 2040	2028	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.exe	28
PID 2040 wrote to memory of 460	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	29
PID 2040 wrote to memory of 460	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	29
PID 2040 wrote to memory of 460	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	29
PID 2040 wrote to memory of 460	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	29
PID 2040 wrote to memory of 460	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	29
PID 2040 wrote to memory of 460	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	29
PID 2040 wrote to memory of 460	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	29
PID 2040 wrote to memory of 460	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	29
PID 2040 wrote to memory of 460	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	29
PID 2040 wrote to memory of 1584	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	32
PID 2040 wrote to memory of 1584	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	32
PID 2040 wrote to memory of 1584	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	32
PID 2040 wrote to memory of 1584	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	32
PID 2040 wrote to memory of 1584	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	32
PID 2040 wrote to memory of 1584	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	32
PID 2040 wrote to memory of 1584	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	32
PID 2040 wrote to memory of 1584	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	32
PID 2040 wrote to memory of 1584	2040	728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE	32

C:\Users\Admin\AppData\Local\Temp\728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.exe
"C:\Users\Admin\AppData\Local\Temp\728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2028
- C:\Users\Admin\AppData\Local\Temp\728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE
  "C:\Users\Admin\AppData\Local\Temp\728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2040
- - C:\Users\Admin\AppData\Local\Temp\728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE
    /scomma "C:\Users\Admin\AppData\Local\Temp\EjAZrPm0zy.ini"
    3⤵
    PID:460
- - C:\Users\Admin\AppData\Local\Temp\728fbab7cf1a650c392461b9bd9b9bace728c5b11e06c67c9436fdbd059c4fe7.EXE
    /scomma "C:\Users\Admin\AppData\Local\Temp\nBxm3RLRyJ.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1584

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\EjAZrPm0zy.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/460-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/460-74-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/460-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/460-71-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/460-66-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/460-69-0x00000000761E1000-0x00000000761E3000-memory.dmp

Filesize
8KB

Download
memory/1584-77-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1584-81-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1584-82-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1584-83-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2040-61-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2040-72-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2040-59-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2040-57-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2040-56-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2040-84-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/2040-85-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

Sharing