isrstealer | 7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f

General

Target

7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe
Size

624KB
MD5

a6fc40105117a5663929134ace126bab
SHA1

92448ef679c4bd601b20c9efb1afc3ebfd6dd5bc
SHA256

7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f
SHA512

cfbce633174f2b92c5e348b9a7477ba132befd82343b99090cd0d502ba1d774b25facbb131de1e692bd4b623dc4258f0b4b1cef90a1a113a8aa0a97211675794
SSDEEP

12288:teO2NPnq1aOX5gfIRD2oZAaN7CANofcwrxBieAjgy7FJaGaY/mXO:tGxp254uLzIF0wrX9OxJam/me

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/1732-59-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1732-61-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1732-62-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1732-72-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1732-77-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1732-85-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/272-83-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/272-84-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/272-83-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/272-84-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1688-66-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1688-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1688-71-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1688-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1688-74-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/272-78-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/272-82-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/272-83-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/272-84-0x0000000000400000-0x000000000041F000-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-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1776 set thread context of 1732	1776	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	28
PID 1732 set thread context of 1688	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	29
PID 1732 set thread context of 272	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	32

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1776	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe
1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1776 wrote to memory of 1732	1776	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	28
PID 1776 wrote to memory of 1732	1776	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	28
PID 1776 wrote to memory of 1732	1776	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	28
PID 1776 wrote to memory of 1732	1776	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	28
PID 1776 wrote to memory of 1732	1776	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	28
PID 1776 wrote to memory of 1732	1776	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	28
PID 1776 wrote to memory of 1732	1776	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	28
PID 1776 wrote to memory of 1732	1776	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	28
PID 1732 wrote to memory of 1688	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	29
PID 1732 wrote to memory of 1688	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	29
PID 1732 wrote to memory of 1688	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	29
PID 1732 wrote to memory of 1688	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	29
PID 1732 wrote to memory of 1688	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	29
PID 1732 wrote to memory of 1688	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	29
PID 1732 wrote to memory of 1688	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	29
PID 1732 wrote to memory of 1688	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	29
PID 1732 wrote to memory of 1688	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	29
PID 1732 wrote to memory of 272	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	32
PID 1732 wrote to memory of 272	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	32
PID 1732 wrote to memory of 272	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	32
PID 1732 wrote to memory of 272	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	32
PID 1732 wrote to memory of 272	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	32
PID 1732 wrote to memory of 272	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	32
PID 1732 wrote to memory of 272	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	32
PID 1732 wrote to memory of 272	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	32
PID 1732 wrote to memory of 272	1732	7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe	32

C:\Users\Admin\AppData\Local\Temp\7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe
"C:\Users\Admin\AppData\Local\Temp\7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1776
- C:\Users\Admin\AppData\Local\Temp\7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe
  "C:\Users\Admin\AppData\Local\Temp\7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1732
- - C:\Users\Admin\AppData\Local\Temp\7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\MiEKlHRFfl.ini"
    3⤵
    PID:1688
- - C:\Users\Admin\AppData\Local\Temp\7e421123e8b3b4b6e8716d6bfde807925f4d749f7cba3493e8147d14b2758e7f.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\oCj1fiMvnu.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:272

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

Loading Replay Monitor...

Downloads

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

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/272-84-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/272-83-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/272-82-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/272-78-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1688-66-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1688-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1688-71-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1688-69-0x0000000075521000-0x0000000075523000-memory.dmp

Filesize
8KB

Download
memory/1688-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1688-74-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1732-72-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1732-77-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1732-56-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1732-61-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1732-59-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1732-57-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1732-85-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

Sharing