isrstealer | 2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5

General

Target

2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe
Size

1.1MB
MD5

3f87e3588e862b0494c22ae0c0cf8898
SHA1

07d2f0a663108ebf6130b1a28921e67b76ee5564
SHA256

2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5
SHA512

bdc255a133acf642b0f5bab6cebbde5bc7205054309aba46b9e69748b8de5ecb0d86c47d0a1a06998a884b40bbf7491cd0a0fa448aedec9f2ab70ac3954b5b8b
SSDEEP

12288:zH7Wcjdc/r2sxxiPGGAOOPSXDV8ClgVYhX5FSsf8Q66oIWr69oGE15jSsFZyoopF:zbCj2sObHtqQ4Q66DssoRNFZyo4gE

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/3936-133-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3936-137-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3936-146-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/3936-154-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/5116-151-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/5116-152-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/5116-153-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/5116-151-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/5116-152-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/5116-153-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4912-139-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4912-141-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4912-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4912-143-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4912-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/5116-148-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/5116-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/5116-151-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/5116-152-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/5116-153-0x0000000000400000-0x000000000041F000-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-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1236 set thread context of 3936	1236	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	79
PID 3936 set thread context of 4912	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	80
PID 3936 set thread context of 5116	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	89

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
1236	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe
1236	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe
1236	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
1236	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe
1236	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe
1236	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1236 wrote to memory of 3936	1236	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	79
PID 1236 wrote to memory of 3936	1236	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	79
PID 1236 wrote to memory of 3936	1236	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	79
PID 1236 wrote to memory of 3936	1236	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	79
PID 1236 wrote to memory of 3936	1236	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	79
PID 1236 wrote to memory of 3936	1236	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	79
PID 1236 wrote to memory of 3936	1236	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	79
PID 3936 wrote to memory of 4912	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	80
PID 3936 wrote to memory of 4912	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	80
PID 3936 wrote to memory of 4912	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	80
PID 3936 wrote to memory of 4912	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	80
PID 3936 wrote to memory of 4912	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	80
PID 3936 wrote to memory of 4912	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	80
PID 3936 wrote to memory of 4912	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	80
PID 3936 wrote to memory of 4912	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	80
PID 3936 wrote to memory of 5116	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	89
PID 3936 wrote to memory of 5116	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	89
PID 3936 wrote to memory of 5116	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	89
PID 3936 wrote to memory of 5116	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	89
PID 3936 wrote to memory of 5116	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	89
PID 3936 wrote to memory of 5116	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	89
PID 3936 wrote to memory of 5116	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	89
PID 3936 wrote to memory of 5116	3936	2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe	89

C:\Users\Admin\AppData\Local\Temp\2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe
"C:\Users\Admin\AppData\Local\Temp\2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1236
- C:\Users\Admin\AppData\Local\Temp\2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe
  "C:\Users\Admin\AppData\Local\Temp\2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3936
- - C:\Users\Admin\AppData\Local\Temp\2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\9ZwJT60Paj.ini"
    3⤵
    PID:4912
- - C:\Users\Admin\AppData\Local\Temp\2cb7cd75331102d17938c6986eddf2f5e67f2a43ff84ca99004fc5b33f0ae0f5.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\ndE2397R0D.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:5116

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\9ZwJT60Paj.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/3936-133-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3936-137-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3936-154-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/3936-146-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/4912-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4912-143-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4912-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4912-141-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4912-139-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/5116-148-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/5116-150-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/5116-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/5116-152-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/5116-153-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

Sharing