isrstealer | 5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c

Analysis

max time kernel
171s
max time network
210s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
14/10/2022, 02:08

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General

Target
5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe
Size 953KB
Sample221014-ckswgscdap
SHA256 5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c
MD5 5ed705a5806ff30357438889fc817d50
SHA1 975a660296cd4da150ece48e5643954cf9790dcb
SHA512 10d608c29fcf2e9347484c30f09f3b987a35ef687813ba35fde0c3c2bbdaaae79a049b855a38516d1b9c052d8923fb17623022da84a6d63d7dc4d09a010dca67
SSDEEP 24576:KRmJkcoQricOIQxiZY1iadCQwpqBJ3cyU9nF1KY:PJZoQrbTFZY1iadCn6J3cyqnF1z
MD5 SHA1 SHA512 SSDEEP

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/1468-133-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1468-143-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1468-145-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1468-153-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/1132-150-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/1132-151-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/1132-152-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/1132-150-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/1132-151-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/1132-152-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/176-138-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/176-140-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/176-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/176-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1132-147-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1132-149-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1132-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1132-151-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1132-152-0x0000000000400000-0x000000000041F000-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-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3308 set thread context of 1468	3308	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	82
PID 1468 set thread context of 176	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	83
PID 1468 set thread context of 1132	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	84

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
3308	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe
3308	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe
3308	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
3308	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe
3308	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe
3308	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3308 wrote to memory of 1468	3308	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	82
PID 3308 wrote to memory of 1468	3308	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	82
PID 3308 wrote to memory of 1468	3308	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	82
PID 3308 wrote to memory of 1468	3308	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	82
PID 3308 wrote to memory of 1468	3308	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	82
PID 3308 wrote to memory of 1468	3308	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	82
PID 3308 wrote to memory of 1468	3308	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	82
PID 1468 wrote to memory of 176	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	83
PID 1468 wrote to memory of 176	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	83
PID 1468 wrote to memory of 176	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	83
PID 1468 wrote to memory of 176	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	83
PID 1468 wrote to memory of 176	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	83
PID 1468 wrote to memory of 176	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	83
PID 1468 wrote to memory of 176	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	83
PID 1468 wrote to memory of 176	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	83
PID 1468 wrote to memory of 1132	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	84
PID 1468 wrote to memory of 1132	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	84
PID 1468 wrote to memory of 1132	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	84
PID 1468 wrote to memory of 1132	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	84
PID 1468 wrote to memory of 1132	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	84
PID 1468 wrote to memory of 1132	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	84
PID 1468 wrote to memory of 1132	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	84
PID 1468 wrote to memory of 1132	1468	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	84

C:\Users\Admin\AppData\Local\Temp\5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe
"C:\Users\Admin\AppData\Local\Temp\5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:3308
- C:\Users\Admin\AppData\Local\Temp\5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe
  "C:\Users\Admin\AppData\Local\Temp\5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1468
- - C:\Users\Admin\AppData\Local\Temp\5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\Vz9JYe522P.ini"
    3⤵
    PID:176
- - C:\Users\Admin\AppData\Local\Temp\5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\SwXWSUXny3.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1132

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Vz9JYe522P.ini

Path C:\Users\Admin\AppData\Local\Temp\Vz9JYe522P.ini
Size 5B
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3
MD5 SHA1 SHA512

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memory/176-140-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/176-142-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/176-138-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/176-141-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/1132-147-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/1132-149-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/1132-150-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/1132-151-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/1132-152-0x0000000000400000-0x000000000041F000-memory.dmp

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memory/1468-143-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/1468-145-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/1468-133-0x0000000000400000-0x0000000000442000-memory.dmp

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memory/1468-153-0x0000000000400000-0x0000000000442000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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