33fc0e96135e112320c5c3d9f5ac11dcad02bdc80fe192e25f03dedf7f832c33

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 19:17

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General

Target

33fc0e96135e112320c5c3d9f5ac11dcad02bdc80fe192e25f03dedf7f832c33.dll
Size

223KB
MD5

549a7370587023e277e18d48ba4f0bf2
SHA1

da0d82366c10cc4b234f4d7ac956af68ab12bbab
SHA256

33fc0e96135e112320c5c3d9f5ac11dcad02bdc80fe192e25f03dedf7f832c33
SHA512

d5b9fac6aec0bc2f68839b44e77ae5db522dd39dfb6abc2afd6871e22cef0200a7582d5fdfe10d719be77054c738740a79cc7bd289e1232cac54f437ef9c260f
SSDEEP

6144:ZBAUWGfVg1gufYLIBV+UdvrEFp7hKATy9:0U21guw8BjvrEH7Py9

Score

8^/10

persistence upx

Malware Config

Signatures

Modifies AppInit DLL entries 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1547.001

Modify Registry
T1112

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

Processes:

resource	yara_rule
C:\Program Files\Common Files\System\symsrv.dll	acprotect

Loads dropped DLL 4 IoCs

Processes:

rundll32.exeWerFault.exeWerFault.exe

pid process

3476 rundll32.exe
3476 rundll32.exe
5116 WerFault.exe
3060 WerFault.exe

pid	process
3476	rundll32.exe
3476	rundll32.exe
5116	WerFault.exe
3060	WerFault.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
C:\Program Files\Common Files\System\symsrv.dll	upx
behavioral2/memory/3476-7-0x00000000027F0000-0x0000000002820000-memory.dmp	upx
behavioral2/memory/3476-13-0x00000000027F0000-0x0000000002820000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File created C:\Program Files\Common Files\System\symsrv.dll rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3060 3476 WerFault.exe rundll32.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

rundll32.exe

description pid process

Token: SeDebugPrivilege 3476 rundll32.exe

description	ioc	process
File created	C:\Program Files\Common Files\System\symsrv.dll	rundll32.exe

pid	pid_target	process	target process
3060	3476	WerFault.exe	rundll32.exe

description	pid	process
Token: SeDebugPrivilege	3476	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 1540 wrote to memory of 3476	1540	rundll32.exe	rundll32.exe
PID 1540 wrote to memory of 3476	1540	rundll32.exe	rundll32.exe
PID 1540 wrote to memory of 3476	1540	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\33fc0e96135e112320c5c3d9f5ac11dcad02bdc80fe192e25f03dedf7f832c33.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1540

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\33fc0e96135e112320c5c3d9f5ac11dcad02bdc80fe192e25f03dedf7f832c33.dll,#1
2⤵
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
PID:3476

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3476 -s 700
3⤵
- Loads dropped DLL
- Program crash
PID:3060

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 3476 -ip 3476
1⤵
- Loads dropped DLL
PID:5116

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Program Files\Common Files\System\symsrv.dll
Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/3476-5-0x00000000027F0000-0x0000000002820000-memory.dmp

Filesize
192KB

Download
memory/3476-7-0x00000000027F0000-0x0000000002820000-memory.dmp

Filesize
192KB

Download
memory/3476-13-0x00000000027F0000-0x0000000002820000-memory.dmp

Filesize
192KB

Download
memory/3476-11-0x0000000010000000-0x0000000010025000-memory.dmp

Filesize
148KB

Download