isrstealer | f6bd53e7fe28bb9addafc769a335efcd239f3284d580efbccb6c1b4941c4c317

General

Target

PROJECT 1.exe
Size

550KB
MD5

ed52d89af4045fd3aa9fa988b58f20d5
SHA1

a6fb1d7e0ea8a1acae8bf0a2e409c2eba9af3cf4
SHA256

f6bd53e7fe28bb9addafc769a335efcd239f3284d580efbccb6c1b4941c4c317
SHA512

33773471d78d7c248d12ec3e5818e87346a5d6caec3f523567dba7555a60be569811d05c0ccb70e7b80fc61edbf20985c07de5d7fb7aebf4b1559c8e088081b8
SSDEEP

12288:tsMcZwBYZt2GFqvRhzBlP2WRipK1g/rWJSTgTxVVrdB:gZw+tJFqvSqOKonmPVr/

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/1108-55-0x0000000000400000-0x0000000000491000-memory.dmp	family_isrstealer
behavioral1/memory/1108-63-0x00000000029B0000-0x0000000002A6E000-memory.dmp	family_isrstealer
behavioral1/memory/1108-76-0x0000000000400000-0x0000000000491000-memory.dmp	family_isrstealer
behavioral1/memory/1108-81-0x0000000000330000-0x0000000000340000-memory.dmp	family_isrstealer
behavioral1/memory/1108-92-0x0000000000400000-0x0000000000491000-memory.dmp	family_isrstealer
behavioral1/memory/1108-93-0x0000000000400000-0x0000000000491000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1948-88-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1948-89-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1108-91-0x0000000003800000-0x0000000003891000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral1/memory/1948-88-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1948-89-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1108-91-0x0000000003800000-0x0000000003891000-memory.dmp	Nirsoft

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

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/588-59-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/588-61-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/588-62-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/588-71-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/588-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1948-85-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1948-87-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1948-88-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1948-89-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	PROJECT 1.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1108 set thread context of 588	1108	PROJECT 1.exe	27
PID 1108 set thread context of 1948	1108	PROJECT 1.exe	30

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Apparition	PROJECT 1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\pdf	PROJECT 1.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1108	PROJECT 1.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1108	PROJECT 1.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1108	PROJECT 1.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1108 wrote to memory of 588	1108	PROJECT 1.exe	27
PID 1108 wrote to memory of 588	1108	PROJECT 1.exe	27
PID 1108 wrote to memory of 588	1108	PROJECT 1.exe	27
PID 1108 wrote to memory of 588	1108	PROJECT 1.exe	27
PID 1108 wrote to memory of 588	1108	PROJECT 1.exe	27
PID 1108 wrote to memory of 588	1108	PROJECT 1.exe	27
PID 1108 wrote to memory of 588	1108	PROJECT 1.exe	27
PID 1108 wrote to memory of 588	1108	PROJECT 1.exe	27
PID 1108 wrote to memory of 588	1108	PROJECT 1.exe	27
PID 1108 wrote to memory of 1948	1108	PROJECT 1.exe	30
PID 1108 wrote to memory of 1948	1108	PROJECT 1.exe	30
PID 1108 wrote to memory of 1948	1108	PROJECT 1.exe	30
PID 1108 wrote to memory of 1948	1108	PROJECT 1.exe	30
PID 1108 wrote to memory of 1948	1108	PROJECT 1.exe	30
PID 1108 wrote to memory of 1948	1108	PROJECT 1.exe	30
PID 1108 wrote to memory of 1948	1108	PROJECT 1.exe	30
PID 1108 wrote to memory of 1948	1108	PROJECT 1.exe	30
PID 1108 wrote to memory of 1948	1108	PROJECT 1.exe	30

C:\Users\Admin\AppData\Local\Temp\PROJECT 1.exe
"C:\Users\Admin\AppData\Local\Temp\PROJECT 1.exe"
1⤵
- Suspicious use of SetThreadContext
- Modifies registry class
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1108
- C:\Users\Admin\AppData\Local\Temp\PROJECT 1.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\tbzigI67Nf.ini"
  2⤵
  PID:588
- C:\Users\Admin\AppData\Local\Temp\PROJECT 1.exe
  /scomma "C:\Users\Admin\AppData\Local\Temp\HMf1Jn0JpL.ini"
  2⤵
  - Accesses Microsoft Outlook accounts
  PID:1948

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\tbzigI67Nf.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/588-71-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/588-59-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/588-61-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/588-62-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/588-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1108-65-0x0000000000330000-0x0000000000340000-memory.dmp

Filesize
64KB

Download
memory/1108-77-0x00000000029B0000-0x0000000002A6E000-memory.dmp

Filesize
760KB

Download
memory/1108-66-0x0000000000330000-0x0000000000340000-memory.dmp

Filesize
64KB

Download
memory/1108-67-0x0000000000330000-0x0000000000340000-memory.dmp

Filesize
64KB

Download
memory/1108-68-0x0000000000330000-0x0000000000340000-memory.dmp

Filesize
64KB

Download
memory/1108-69-0x0000000000330000-0x0000000000340000-memory.dmp

Filesize
64KB

Download
memory/1108-70-0x0000000002E70000-0x0000000002F01000-memory.dmp

Filesize
580KB

Download
memory/1108-64-0x0000000000330000-0x0000000000340000-memory.dmp

Filesize
64KB

Download
memory/1108-63-0x00000000029B0000-0x0000000002A6E000-memory.dmp

Filesize
760KB

Download
memory/1108-55-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download
memory/1108-76-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download
memory/1108-54-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download
memory/1108-78-0x0000000000330000-0x0000000000340000-memory.dmp

Filesize
64KB

Download
memory/1108-79-0x0000000000330000-0x0000000000340000-memory.dmp

Filesize
64KB

Download
memory/1108-80-0x0000000000330000-0x0000000000340000-memory.dmp

Filesize
64KB

Download
memory/1108-81-0x0000000000330000-0x0000000000340000-memory.dmp

Filesize
64KB

Download
memory/1108-82-0x0000000000330000-0x0000000000340000-memory.dmp

Filesize
64KB

Download
memory/1108-93-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download
memory/1108-92-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download
memory/1108-91-0x0000000003800000-0x0000000003891000-memory.dmp

Filesize
580KB

Download
memory/1948-89-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1948-88-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1948-87-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1948-85-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

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