isrstealer | fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c

General

Target

fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
Size

1.1MB
MD5

11c20f0a2f97d615cb9ddd634c04086d
SHA1

9296c3f962e8078fd9fbfa775a688995d0fd9e25
SHA256

fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c
SHA512

57fb963592fe1f2d0fea3aeb5d93cccbdc61136cdf3b8e37fab362ce782493043f974216ade6b807a86e50e431194859768afcdf367a448ad8e3c9bc1dc1ea52
SSDEEP

12288:zH7Wcjdc/r2sxxiPGGAOOPSXDV8ClgVYhX5FSsf8Q66oIWr69oGE15jSsFZyoop3:zbCj2sObHtqQ4Q66DssoRNFZyopgX

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 4 IoCs

resource	yara_rule
behavioral2/memory/884-133-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/884-141-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/884-151-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/884-152-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3212-149-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/3212-150-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/3212-149-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/3212-150-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4584-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4584-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4584-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4584-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3212-146-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3212-148-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3212-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/3212-150-0x0000000000400000-0x000000000041F000-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-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3352 set thread context of 884	3352	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	80
PID 884 set thread context of 4584	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	81
PID 884 set thread context of 3212	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	82

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

System Information Discovery
T1082

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
3352	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
3352	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
3352	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
3352	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
3352	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
3352	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3352 wrote to memory of 884	3352	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	80
PID 3352 wrote to memory of 884	3352	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	80
PID 3352 wrote to memory of 884	3352	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	80
PID 3352 wrote to memory of 884	3352	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	80
PID 3352 wrote to memory of 884	3352	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	80
PID 3352 wrote to memory of 884	3352	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	80
PID 3352 wrote to memory of 884	3352	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	80
PID 884 wrote to memory of 4584	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	81
PID 884 wrote to memory of 4584	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	81
PID 884 wrote to memory of 4584	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	81
PID 884 wrote to memory of 4584	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	81
PID 884 wrote to memory of 4584	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	81
PID 884 wrote to memory of 4584	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	81
PID 884 wrote to memory of 4584	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	81
PID 884 wrote to memory of 4584	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	81
PID 884 wrote to memory of 3212	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	82
PID 884 wrote to memory of 3212	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	82
PID 884 wrote to memory of 3212	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	82
PID 884 wrote to memory of 3212	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	82
PID 884 wrote to memory of 3212	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	82
PID 884 wrote to memory of 3212	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	82
PID 884 wrote to memory of 3212	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	82
PID 884 wrote to memory of 3212	884	fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe	82

C:\Users\Admin\AppData\Local\Temp\fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
"C:\Users\Admin\AppData\Local\Temp\fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:3352
- C:\Users\Admin\AppData\Local\Temp\fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
  "C:\Users\Admin\AppData\Local\Temp\fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:884
- - C:\Users\Admin\AppData\Local\Temp\fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\bwdq1w1hdq.ini"
    3⤵
    PID:4584
- - C:\Users\Admin\AppData\Local\Temp\fa2c2a36f73c98508cf406f012a6a2217e4611fb2d22e1ee01998abd2fb2396c.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\urxo0dn6zG.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:3212

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\bwdq1w1hdq.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/884-133-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/884-152-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/884-151-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/884-141-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3212-149-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3212-146-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3212-148-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3212-150-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4584-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4584-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4584-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4584-138-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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