8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f

General

Target

8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe
Size

814KB
MD5

401072f6b087f742d80cb9b6f4394141
SHA1

58024ebb3fd04470984581b4cdafd732748774e1
SHA256

8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f
SHA512

422bfc1ea8e0ef7fb7f04325ef619ec7f6c8e865a20d62a7e30e9647186e9d6421f410228ebfc70611413bde8d7ca112536ed42e2e8cd3faec79ac2b2e184375
SSDEEP

12288:LmQZ4NUMNEUHLsrUYVcYkzot2bdOHOJWZDFonFucyJoES+AXV:ZZ4CreJYVcYYoD2OAXV

Score

9^/10

Malware Config

Signatures

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral2/memory/1732-145-0x0000000002140000-0x00000000021D0000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral2/memory/1732-145-0x0000000002140000-0x00000000021D0000-memory.dmp	WebBrowserPassView

Nirsoft 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1732-145-0x0000000002140000-0x00000000021D0000-memory.dmp	Nirsoft

Executes dropped EXE 2 IoCs

Processes:

Windows Update.exeWindows Update.exe

pid process

1112 Windows Update.exe
456 Windows Update.exe

pid	process
1112	Windows Update.exe
456	Windows Update.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exeWindows Update.exe

description	pid	process	target process
PID 2656 set thread context of 1732	2656	8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe	8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe
PID 1112 set thread context of 456	1112	Windows Update.exe	Windows Update.exe

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 SetWindowsHookEx 2 IoCs

Processes:

8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exeWindows Update.exe

pid process

2656 8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe
1112 Windows Update.exe

pid	process
2656	8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe
1112	Windows Update.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exeWindows Update.exe

description	pid	process	target process
PID 2656 wrote to memory of 1732	2656	8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe	8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe
PID 2656 wrote to memory of 1732	2656	8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe	8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe
PID 2656 wrote to memory of 1732	2656	8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe	8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe
PID 1732 wrote to memory of 1112	1732	8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe	Windows Update.exe
PID 1732 wrote to memory of 1112	1732	8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe	Windows Update.exe
PID 1732 wrote to memory of 1112	1732	8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe	Windows Update.exe
PID 1112 wrote to memory of 456	1112	Windows Update.exe	Windows Update.exe
PID 1112 wrote to memory of 456	1112	Windows Update.exe	Windows Update.exe
PID 1112 wrote to memory of 456	1112	Windows Update.exe	Windows Update.exe

C:\Users\Admin\AppData\Local\Temp\8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe
"C:\Users\Admin\AppData\Local\Temp\8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2656

C:\Users\Admin\AppData\Local\Temp\8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe
C:\Users\Admin\AppData\Local\Temp\8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f.exe"
2⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1732

C:\Users\Admin\AppData\Roaming\Windows Update.exe
"C:\Users\Admin\AppData\Roaming\Windows Update.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1112

C:\Users\Admin\AppData\Roaming\Windows Update.exe
C:\Users\Admin\AppData\Roaming\Windows Update.exe"
4⤵
- Executes dropped EXE
PID:456

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Windows Update.exe
Filesize
814KB

MD5
401072f6b087f742d80cb9b6f4394141

SHA1
58024ebb3fd04470984581b4cdafd732748774e1

SHA256
8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f

SHA512
422bfc1ea8e0ef7fb7f04325ef619ec7f6c8e865a20d62a7e30e9647186e9d6421f410228ebfc70611413bde8d7ca112536ed42e2e8cd3faec79ac2b2e184375

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Update.exe
Filesize
814KB

MD5
401072f6b087f742d80cb9b6f4394141

SHA1
58024ebb3fd04470984581b4cdafd732748774e1

SHA256
8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f

SHA512
422bfc1ea8e0ef7fb7f04325ef619ec7f6c8e865a20d62a7e30e9647186e9d6421f410228ebfc70611413bde8d7ca112536ed42e2e8cd3faec79ac2b2e184375

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Update.exe
Filesize
814KB

MD5
401072f6b087f742d80cb9b6f4394141

SHA1
58024ebb3fd04470984581b4cdafd732748774e1

SHA256
8b99d632f384bc365e1b478dde82e030a5dc3eb51b9f58767bd4012a50d83f8f

SHA512
422bfc1ea8e0ef7fb7f04325ef619ec7f6c8e865a20d62a7e30e9647186e9d6421f410228ebfc70611413bde8d7ca112536ed42e2e8cd3faec79ac2b2e184375

Download Submit
memory/456-158-0x0000000000000000-mapping.dmp

Download
memory/1112-160-0x00000000772B0000-0x0000000077453000-memory.dmp

Filesize
1.6MB

Download
memory/1112-151-0x0000000000000000-mapping.dmp

Download
memory/1732-140-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/1732-145-0x0000000002140000-0x00000000021D0000-memory.dmp

Filesize
576KB

Download
memory/1732-148-0x00000000772B0000-0x0000000077453000-memory.dmp

Filesize
1.6MB

Download
memory/1732-149-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/1732-150-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/1732-144-0x00000000772B0000-0x0000000077453000-memory.dmp

Filesize
1.6MB

Download
memory/1732-143-0x00000000772B0000-0x0000000077453000-memory.dmp

Filesize
1.6MB

Download
memory/1732-156-0x00000000772B0000-0x0000000077453000-memory.dmp

Filesize
1.6MB

Download
memory/1732-157-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/1732-137-0x00000000772B0000-0x0000000077453000-memory.dmp

Filesize
1.6MB

Download
memory/1732-135-0x0000000000000000-mapping.dmp

Download
memory/2656-134-0x00000000023C0000-0x00000000023C7000-memory.dmp

Filesize
28KB

Download
memory/2656-136-0x00000000772B0000-0x0000000077453000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads