isrstealer | 9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25

Analysis

max time kernel
83s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
28/11/2022, 18:24

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General

Target

9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe
Size

411KB
MD5

05de72909298f6ce51e8c0207db5a6c1
SHA1

7a52632ad804a1a3cd8251f2c0a6517207dbde6e
SHA256

9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25
SHA512

00334d94601f35db1a0d6c3e2d9b6c6981b386bf3845ecbd786e86e5e775578b568c2db75ad1f0587cd17dba1ce36a06f7d2a598cb2872767d9588c57adba2d5
SSDEEP

12288:uSazSusUabSl3jl4EkYHJzhZoTLxFHuiN:uL3R4EjVyLnOiN

Score

10^/10

isrstealer collection persistence 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 5 IoCs

resource	yara_rule
behavioral2/memory/4976-134-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4976-136-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4976-144-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4976-155-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/4976-156-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3392-148-0x0000000000000000-mapping.dmp	MailPassView
behavioral2/memory/3392-152-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3392-153-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/3392-148-0x0000000000000000-mapping.dmp	Nirsoft
behavioral2/memory/3392-152-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3392-153-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3592-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3592-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3592-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3592-145-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3592-146-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3392-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3392-151-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3392-152-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3392-153-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	RegSvcs.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\FSILlzCwXB = "\"C:\\Users\\Admin\\AppData\\Roaming\\FSILlzCwXB\\FSILlzCwXB.exe\""	RegSvcs.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4900 set thread context of 4976	4900	9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe	80
PID 4976 set thread context of 3592	4976	RegSvcs.exe	81
PID 4976 set thread context of 3392	4976	RegSvcs.exe	82
PID 4900 set thread context of 3240	4900	9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe	89

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4976	RegSvcs.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 4900 wrote to memory of 4976	4900	9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe	80
PID 4900 wrote to memory of 4976	4900	9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe	80
PID 4900 wrote to memory of 4976	4900	9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe	80
PID 4900 wrote to memory of 4976	4900	9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe	80
PID 4900 wrote to memory of 4976	4900	9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe	80
PID 4900 wrote to memory of 4976	4900	9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe	80
PID 4900 wrote to memory of 4976	4900	9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe	80
PID 4976 wrote to memory of 3592	4976	RegSvcs.exe	81
PID 4976 wrote to memory of 3592	4976	RegSvcs.exe	81
PID 4976 wrote to memory of 3592	4976	RegSvcs.exe	81
PID 4976 wrote to memory of 3592	4976	RegSvcs.exe	81
PID 4976 wrote to memory of 3592	4976	RegSvcs.exe	81
PID 4976 wrote to memory of 3592	4976	RegSvcs.exe	81
PID 4976 wrote to memory of 3592	4976	RegSvcs.exe	81
PID 4976 wrote to memory of 3592	4976	RegSvcs.exe	81
PID 4976 wrote to memory of 3392	4976	RegSvcs.exe	82
PID 4976 wrote to memory of 3392	4976	RegSvcs.exe	82
PID 4976 wrote to memory of 3392	4976	RegSvcs.exe	82
PID 4976 wrote to memory of 3392	4976	RegSvcs.exe	82
PID 4976 wrote to memory of 3392	4976	RegSvcs.exe	82
PID 4976 wrote to memory of 3392	4976	RegSvcs.exe	82
PID 4976 wrote to memory of 3392	4976	RegSvcs.exe	82
PID 4976 wrote to memory of 3392	4976	RegSvcs.exe	82
PID 4900 wrote to memory of 3240	4900	9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe	89
PID 4900 wrote to memory of 3240	4900	9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe	89
PID 4900 wrote to memory of 3240	4900	9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe	89
PID 4900 wrote to memory of 3240	4900	9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe	89
PID 4900 wrote to memory of 3240	4900	9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe	89
PID 4900 wrote to memory of 3240	4900	9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe	89
PID 4900 wrote to memory of 3240	4900	9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe	89
PID 4900 wrote to memory of 3240	4900	9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe	89

C:\Users\Admin\AppData\Local\Temp\9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe
"C:\Users\Admin\AppData\Local\Temp\9d978ed6ac2d5d4d980fb8d4f2190225b1e73ed0c1858f6cdded840c2f579b25.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4900
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4976
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\c5X6MggClf.ini"
    3⤵
    PID:3592
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\NQP1cz53ek.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:3392
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe" /FSILlzCwXB /C:\Users\Admin\AppData\Roaming\FSILlzCwXB\FSILlzCwXB.exe
  2⤵
  - Adds Run key to start application
  PID:3240

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\c5X6MggClf.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/3240-161-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download
memory/3240-160-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download
memory/3240-159-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download
memory/3240-158-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/3392-153-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3392-152-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3392-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3392-149-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3592-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3592-145-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3592-146-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3592-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3592-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4900-154-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download
memory/4900-132-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download
memory/4900-162-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download
memory/4976-155-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4976-156-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4976-144-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4976-136-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4976-134-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download