isrstealer | 82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369

General

Target

82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
Size

964KB
MD5

615df21a56a0808841a781755c4e5e70
SHA1

6079cfbb1816cb7992ae472fe805b54a9a3cf03c
SHA256

82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369
SHA512

040962c0fe921cb8c1cadbcc4e76e40977080e83f500144beb4c59b40337907649904c01557d6c55b6d8ba3c3526bd15876b89479909406a5a7c04d8529464da
SSDEEP

24576:CthEVaPqLfq0df9k3C6QTnARS6jT01bi4v+PRzu97bDLFfi6WUrALUgx9RO:aEVUcy0jB

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/4180-138-0x0000000000400000-0x0000000000448000-memory.dmp	family_isrstealer
behavioral2/memory/4180-145-0x0000000000400000-0x0000000000448000-memory.dmp	family_isrstealer
behavioral2/memory/4180-148-0x0000000000400000-0x0000000000448000-memory.dmp	family_isrstealer
behavioral2/memory/4180-156-0x0000000000400000-0x0000000000448000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4820-154-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/4820-155-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/4820-154-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/4820-155-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 17 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4748-132-0x0000000000400000-0x00000000004E2000-memory.dmp	upx
behavioral2/memory/4180-134-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral2/memory/4180-137-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral2/memory/4748-136-0x0000000000400000-0x00000000004E2000-memory.dmp	upx
behavioral2/memory/4180-138-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral2/memory/4564-142-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4564-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4180-145-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral2/memory/4564-146-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4564-147-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4180-148-0x0000000000400000-0x0000000000448000-memory.dmp	upx
behavioral2/memory/4820-150-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4820-153-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4564-152-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4820-154-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4820-155-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/4180-156-0x0000000000400000-0x0000000000448000-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	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/4748-136-0x0000000000400000-0x00000000004E2000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4748 set thread context of 4180	4748	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	81
PID 4180 set thread context of 4564	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	82
PID 4180 set thread context of 4820	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.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
4748	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
4748	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
4748	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
4748	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
4748	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
4748	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4748 wrote to memory of 4180	4748	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	81
PID 4748 wrote to memory of 4180	4748	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	81
PID 4748 wrote to memory of 4180	4748	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	81
PID 4748 wrote to memory of 4180	4748	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	81
PID 4748 wrote to memory of 4180	4748	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	81
PID 4748 wrote to memory of 4180	4748	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	81
PID 4748 wrote to memory of 4180	4748	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	81
PID 4748 wrote to memory of 4180	4748	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	81
PID 4180 wrote to memory of 4564	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	82
PID 4180 wrote to memory of 4564	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	82
PID 4180 wrote to memory of 4564	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	82
PID 4180 wrote to memory of 4564	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	82
PID 4180 wrote to memory of 4564	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	82
PID 4180 wrote to memory of 4564	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	82
PID 4180 wrote to memory of 4564	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	82
PID 4180 wrote to memory of 4564	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	82
PID 4180 wrote to memory of 4820	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	84
PID 4180 wrote to memory of 4820	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	84
PID 4180 wrote to memory of 4820	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	84
PID 4180 wrote to memory of 4820	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	84
PID 4180 wrote to memory of 4820	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	84
PID 4180 wrote to memory of 4820	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	84
PID 4180 wrote to memory of 4820	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	84
PID 4180 wrote to memory of 4820	4180	82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe	84

C:\Users\Admin\AppData\Local\Temp\82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
"C:\Users\Admin\AppData\Local\Temp\82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4748
- C:\Users\Admin\AppData\Local\Temp\82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
  "C:\Users\Admin\AppData\Local\Temp\82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4180
- - C:\Users\Admin\AppData\Local\Temp\82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\qhuNO5sEhb.ini"
    3⤵
    PID:4564
- - C:\Users\Admin\AppData\Local\Temp\82112544fc9f81ccab9fbc8c8f1614b92091b87171f925a0e39b8c5694f23369.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\hQSbj6LSkP.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:4820

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

memory/4180-145-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/4180-134-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/4180-137-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/4180-156-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/4180-138-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/4180-148-0x0000000000400000-0x0000000000448000-memory.dmp

Filesize
288KB

Download
memory/4564-146-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4564-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4564-142-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4564-147-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4564-152-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4748-132-0x0000000000400000-0x00000000004E2000-memory.dmp

Filesize
904KB

Download
memory/4748-136-0x0000000000400000-0x00000000004E2000-memory.dmp

Filesize
904KB

Download
memory/4820-150-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4820-153-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4820-154-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4820-155-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

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