isrstealer | 5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c

General

Target

5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe
Size

953KB
MD5

5ed705a5806ff30357438889fc817d50
SHA1

975a660296cd4da150ece48e5643954cf9790dcb
SHA256

5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c
SHA512

10d608c29fcf2e9347484c30f09f3b987a35ef687813ba35fde0c3c2bbdaaae79a049b855a38516d1b9c052d8923fb17623022da84a6d63d7dc4d09a010dca67
SSDEEP

24576:KRmJkcoQricOIQxiZY1iadCQwpqBJ3cyU9nF1KY:PJZoQrbTFZY1iadCn6J3cyqnF1z

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/1316-58-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1316-60-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1316-61-0x0000000000401180-mapping.dmp	family_isrstealer
behavioral1/memory/1316-71-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1316-83-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral1/memory/1316-84-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1432-81-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral1/memory/1432-82-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral1/memory/1432-81-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral1/memory/1432-82-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1668-65-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1668-69-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1668-70-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1668-72-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1668-73-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral1/memory/1432-76-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1432-80-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1432-81-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral1/memory/1432-82-0x0000000000400000-0x000000000041F000-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-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1768 set thread context of 1316	1768	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	27
PID 1316 set thread context of 1668	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	28
PID 1316 set thread context of 1432	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	31

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
1768	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe
1768	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe
1768	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
1768	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe
1768	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe
1768	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 1768 wrote to memory of 1316	1768	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	27
PID 1768 wrote to memory of 1316	1768	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	27
PID 1768 wrote to memory of 1316	1768	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	27
PID 1768 wrote to memory of 1316	1768	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	27
PID 1768 wrote to memory of 1316	1768	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	27
PID 1768 wrote to memory of 1316	1768	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	27
PID 1768 wrote to memory of 1316	1768	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	27
PID 1316 wrote to memory of 1668	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	28
PID 1316 wrote to memory of 1668	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	28
PID 1316 wrote to memory of 1668	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	28
PID 1316 wrote to memory of 1668	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	28
PID 1316 wrote to memory of 1668	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	28
PID 1316 wrote to memory of 1668	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	28
PID 1316 wrote to memory of 1668	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	28
PID 1316 wrote to memory of 1668	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	28
PID 1316 wrote to memory of 1668	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	28
PID 1316 wrote to memory of 1432	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	31
PID 1316 wrote to memory of 1432	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	31
PID 1316 wrote to memory of 1432	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	31
PID 1316 wrote to memory of 1432	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	31
PID 1316 wrote to memory of 1432	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	31
PID 1316 wrote to memory of 1432	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	31
PID 1316 wrote to memory of 1432	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	31
PID 1316 wrote to memory of 1432	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	31
PID 1316 wrote to memory of 1432	1316	5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe	31

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:1768
- 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:1316
- - C:\Users\Admin\AppData\Local\Temp\5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\mRyEcxaAk2.ini"
    3⤵
    PID:1668
- - C:\Users\Admin\AppData\Local\Temp\5dddd24250846a011d3fbaadfe15b9f5043aff2d613bb47494e1bc6b3d2d3e3c.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\8IGy6SvoUt.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1432

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\mRyEcxaAk2.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1316-71-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1316-84-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1316-58-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1316-60-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1316-83-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1316-56-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1316-55-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1432-76-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1432-82-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1432-80-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1432-81-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1668-69-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1668-73-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1668-72-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1668-65-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1668-70-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1768-54-0x0000000075931000-0x0000000075933000-memory.dmp

Filesize
8KB

Download

Analysis

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