a630695fa734022ecb859d6cb6932b1f683f575a94b2193c4bac635673943249

General

Target

gpa_cal.exe
Size

43KB
MD5

4e05534f1b1a17eea6e372ef1abd735e
SHA1

5a93caa8a184b56afd6d7569b1b049d908ea7c17
SHA256

976f0eab8e1394dcecd01ab989d26ccf9fc383c1c91acc0a7530348d5c5b759a
SHA512

262b6e6d2fd58302fcbc54ae51ef3d78d118cd74ab4bd783c5af063df04a672160fe0e5d8e274fe0a4e9a17aa0c4fd301203e1303c2c0ae51aa25e2ffcd37824
SSDEEP

768:XAyNMrbxn9kXhFVzrzkOUIAewWxk8VhTqDgCqo:QymgFxkExTVhoq

Score

8^/10

evasion persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

Avastlt.exe

pid process

1684 Avastlt.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

332 netsh.exe

pid	process
1684	Avastlt.exe

pid	process
332	netsh.exe

Drops startup file 2 IoCs

Processes:

Avastlt.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\2f2b25bdc1662b44aed8777af0c3c8f7.exe	Avastlt.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\2f2b25bdc1662b44aed8777af0c3c8f7.exe	Avastlt.exe

Loads dropped DLL 1 IoCs

Processes:

gpa_cal.exe

pid process

1492 gpa_cal.exe

pid	process
1492	gpa_cal.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Avastlt.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\2f2b25bdc1662b44aed8777af0c3c8f7 = "\"C:\\Users\\Admin\\AppData\\Roaming\\Avastlt.exe\" .."	Avastlt.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\2f2b25bdc1662b44aed8777af0c3c8f7 = "\"C:\\Users\\Admin\\AppData\\Roaming\\Avastlt.exe\" .."	Avastlt.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

Avastlt.exe

pid process

1684 Avastlt.exe
1684 Avastlt.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Avastlt.exe

description pid process

Token: SeDebugPrivilege 1684 Avastlt.exe

pid	process
1684	Avastlt.exe
1684	Avastlt.exe

description	pid	process
Token: SeDebugPrivilege	1684	Avastlt.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

gpa_cal.exeAvastlt.exe

description	pid	process	target process
PID 1492 wrote to memory of 1684	1492	gpa_cal.exe	Avastlt.exe
PID 1492 wrote to memory of 1684	1492	gpa_cal.exe	Avastlt.exe
PID 1492 wrote to memory of 1684	1492	gpa_cal.exe	Avastlt.exe
PID 1492 wrote to memory of 1684	1492	gpa_cal.exe	Avastlt.exe
PID 1684 wrote to memory of 332	1684	Avastlt.exe	netsh.exe
PID 1684 wrote to memory of 332	1684	Avastlt.exe	netsh.exe
PID 1684 wrote to memory of 332	1684	Avastlt.exe	netsh.exe
PID 1684 wrote to memory of 332	1684	Avastlt.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\gpa_cal.exe
"C:\Users\Admin\AppData\Local\Temp\gpa_cal.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1492

C:\Users\Admin\AppData\Roaming\Avastlt.exe
"C:\Users\Admin\AppData\Roaming\Avastlt.exe"
2⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1684

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\Avastlt.exe" "Avastlt.exe" ENABLE
3⤵
- Modifies Windows Firewall
PID:332

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Avastlt.exe

Filesize
43KB

MD5
4e05534f1b1a17eea6e372ef1abd735e

SHA1
5a93caa8a184b56afd6d7569b1b049d908ea7c17

SHA256
976f0eab8e1394dcecd01ab989d26ccf9fc383c1c91acc0a7530348d5c5b759a

SHA512
262b6e6d2fd58302fcbc54ae51ef3d78d118cd74ab4bd783c5af063df04a672160fe0e5d8e274fe0a4e9a17aa0c4fd301203e1303c2c0ae51aa25e2ffcd37824

Download Submit
C:\Users\Admin\AppData\Roaming\Avastlt.exe

Filesize
43KB

MD5
4e05534f1b1a17eea6e372ef1abd735e

SHA1
5a93caa8a184b56afd6d7569b1b049d908ea7c17

SHA256
976f0eab8e1394dcecd01ab989d26ccf9fc383c1c91acc0a7530348d5c5b759a

SHA512
262b6e6d2fd58302fcbc54ae51ef3d78d118cd74ab4bd783c5af063df04a672160fe0e5d8e274fe0a4e9a17aa0c4fd301203e1303c2c0ae51aa25e2ffcd37824

Download Submit
\Users\Admin\AppData\Roaming\Avastlt.exe

Filesize
43KB

MD5
4e05534f1b1a17eea6e372ef1abd735e

SHA1
5a93caa8a184b56afd6d7569b1b049d908ea7c17

SHA256
976f0eab8e1394dcecd01ab989d26ccf9fc383c1c91acc0a7530348d5c5b759a

SHA512
262b6e6d2fd58302fcbc54ae51ef3d78d118cd74ab4bd783c5af063df04a672160fe0e5d8e274fe0a4e9a17aa0c4fd301203e1303c2c0ae51aa25e2ffcd37824

Download Submit
memory/332-62-0x0000000000000000-mapping.dmp

Download
memory/1492-54-0x0000000076BA1000-0x0000000076BA3000-memory.dmp

Filesize
8KB

Download
memory/1492-55-0x0000000074F30000-0x00000000754DB000-memory.dmp

Filesize
5.7MB

Download
memory/1492-61-0x0000000074F30000-0x00000000754DB000-memory.dmp

Filesize
5.7MB

Download
memory/1684-57-0x0000000000000000-mapping.dmp

Download
memory/1684-63-0x0000000074F30000-0x00000000754DB000-memory.dmp

Filesize
5.7MB

Download
memory/1684-65-0x0000000074F30000-0x00000000754DB000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads