isrstealer | 79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78

General

Target

79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe
Size

962KB
MD5

3cf6b656e35d104433107102910ac4e8
SHA1

56ed850ada396ecc42a2c6f25ff98d542f0bc24f
SHA256

79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78
SHA512

d1c2e67a92e719c2af2546844c6133768ecc4ffcd8e8e32d375eeb918b85a1ba1c65b7f9ce4ffa2e02dcb4d4b47b593e7c22370a7077a7caaf0434a2f2b3998d
SSDEEP

12288:uaWzgMg7v3qnCiMErQohh0F4CCJ8lny/QgurY9oGE15jSsFZyoopXPRpSD0y:ZaHMv6Corjqny/QgU2oRNFZyoG5pSDl

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/5056-133-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/5056-141-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/5056-151-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/5056-152-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2204-149-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/2204-150-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/2204-149-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/2204-150-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4968-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4968-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4968-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4968-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2204-146-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2204-148-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2204-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/2204-150-0x0000000000400000-0x000000000041F000-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-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2496 set thread context of 5056	2496	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	80
PID 5056 set thread context of 4968	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	81
PID 5056 set thread context of 2204	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.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
2496	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe
2496	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe
2496	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
2496	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe
2496	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe
2496	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2496 wrote to memory of 5056	2496	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	80
PID 2496 wrote to memory of 5056	2496	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	80
PID 2496 wrote to memory of 5056	2496	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	80
PID 2496 wrote to memory of 5056	2496	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	80
PID 2496 wrote to memory of 5056	2496	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	80
PID 2496 wrote to memory of 5056	2496	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	80
PID 2496 wrote to memory of 5056	2496	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	80
PID 5056 wrote to memory of 4968	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	81
PID 5056 wrote to memory of 4968	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	81
PID 5056 wrote to memory of 4968	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	81
PID 5056 wrote to memory of 4968	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	81
PID 5056 wrote to memory of 4968	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	81
PID 5056 wrote to memory of 4968	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	81
PID 5056 wrote to memory of 4968	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	81
PID 5056 wrote to memory of 4968	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	81
PID 5056 wrote to memory of 2204	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	82
PID 5056 wrote to memory of 2204	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	82
PID 5056 wrote to memory of 2204	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	82
PID 5056 wrote to memory of 2204	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	82
PID 5056 wrote to memory of 2204	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	82
PID 5056 wrote to memory of 2204	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	82
PID 5056 wrote to memory of 2204	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	82
PID 5056 wrote to memory of 2204	5056	79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe	82

C:\Users\Admin\AppData\Local\Temp\79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe
"C:\Users\Admin\AppData\Local\Temp\79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2496
- C:\Users\Admin\AppData\Local\Temp\79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe
  "C:\Users\Admin\AppData\Local\Temp\79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5056
- - C:\Users\Admin\AppData\Local\Temp\79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\1PyaZ3RAzW.ini"
    3⤵
    PID:4968
- - C:\Users\Admin\AppData\Local\Temp\79a10526b6ec5da00800657516c9d6f5c562168bc71a3b00a998134326e97a78.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\6i0jyONfHN.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:2204

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\1PyaZ3RAzW.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/2204-149-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2204-150-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2204-148-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2204-146-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4968-138-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4968-140-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4968-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4968-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5056-141-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/5056-133-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/5056-151-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/5056-152-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download

Analysis

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