isrstealer | a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a

General

Target

a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe
Size

1.1MB
MD5

018241640ae3cf3433590e6edd6816c7
SHA1

f8c70938a4bcb28530161d53f3e9732f1f14d2d2
SHA256

a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a
SHA512

9d8541e33446c2e12a177d46cacf262c749225df31ca65360605826094eafa3b8c2eee583b511b432e90799c722626d27f1cb71108000cbfdbb8c300e9bc9bf8
SSDEEP

24576:8RmJkqoQrilOIQ+yMxGaCAK0SQOb/yIwhCtS:tJXoQryTiMxGaCLOOb/yhQS

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/1896-58-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1896-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1896-61-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1896-71-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1896-76-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1896-84-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/704-82-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/704-83-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/704-82-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/704-83-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1116-65-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1116-69-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1116-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1116-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1116-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/704-77-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/704-81-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/704-82-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/704-83-0x0000000000400000-0x000000000041F000-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-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 768 set thread context of 1896	768	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	27
PID 1896 set thread context of 1116	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	28
PID 1896 set thread context of 704	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	31

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

System Information Discovery
T1082

Modifies system certificate store 2 TTPs 3 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
768	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe
768	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe
768	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
768	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe
768	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe
768	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 768 wrote to memory of 1896	768	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	27
PID 768 wrote to memory of 1896	768	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	27
PID 768 wrote to memory of 1896	768	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	27
PID 768 wrote to memory of 1896	768	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	27
PID 768 wrote to memory of 1896	768	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	27
PID 768 wrote to memory of 1896	768	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	27
PID 768 wrote to memory of 1896	768	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	27
PID 1896 wrote to memory of 1116	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	28
PID 1896 wrote to memory of 1116	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	28
PID 1896 wrote to memory of 1116	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	28
PID 1896 wrote to memory of 1116	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	28
PID 1896 wrote to memory of 1116	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	28
PID 1896 wrote to memory of 1116	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	28
PID 1896 wrote to memory of 1116	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	28
PID 1896 wrote to memory of 1116	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	28
PID 1896 wrote to memory of 1116	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	28
PID 1896 wrote to memory of 704	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	31
PID 1896 wrote to memory of 704	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	31
PID 1896 wrote to memory of 704	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	31
PID 1896 wrote to memory of 704	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	31
PID 1896 wrote to memory of 704	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	31
PID 1896 wrote to memory of 704	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	31
PID 1896 wrote to memory of 704	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	31
PID 1896 wrote to memory of 704	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	31
PID 1896 wrote to memory of 704	1896	a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe	31

C:\Users\Admin\AppData\Local\Temp\a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe
"C:\Users\Admin\AppData\Local\Temp\a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:768
- C:\Users\Admin\AppData\Local\Temp\a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe
  "C:\Users\Admin\AppData\Local\Temp\a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Modifies system certificate store
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1896
- - C:\Users\Admin\AppData\Local\Temp\a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\Ng9yXjghot.ini"
    3⤵
    PID:1116
- - C:\Users\Admin\AppData\Local\Temp\a3b3db39a3f9f5b28ed6e27f18c0ae7c1dafb1353d3698279bc3e46c8bc1124a.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\dAgh396SvR.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:704

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Install Root Certificate

Modify Registry

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

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\Ng9yXjghot.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/704-83-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/704-82-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/704-81-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/704-77-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/768-54-0x0000000076871000-0x0000000076873000-memory.dmp

Filesize
8KB

Download
memory/1116-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1116-65-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1116-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1116-69-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1116-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1896-76-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1896-71-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1896-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1896-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1896-56-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1896-55-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1896-84-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

Sharing