855507cd50c8ad2239a2dcbb10d7632f8d11c21451098872ae589d8117165f22

Analysis

max time kernel
140s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
02/05/2024, 12:15

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General

Target

855507cd50c8ad2239a2dcbb10d7632f8d11c21451098872ae589d8117165f22.dll
Size

1.1MB
MD5

a9730b9b9e4dcff7efb0742e36b297ab
SHA1

1ffc72578e7afff045a828d27fd79c7d560cab68
SHA256

855507cd50c8ad2239a2dcbb10d7632f8d11c21451098872ae589d8117165f22
SHA512

4fbfb2c4c00ff0d4bab55a07c52db421adb74c0268642a0b59290596fc263544f8c9452d3d446b9827677defd573df31d0c18ea2142b7067a8bf81143a435b30
SSDEEP

24576:V2mj42MEVQPGEorkSGzuX/7DkbSrh/qtoT/cgB8SnLZrEH7pX:xjnMEVQuFkS1vkurNqtoTkgCSna

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.

resource	yara_rule
behavioral2/files/0x000c000000023b33-1.dat	acprotect

Loads dropped DLL 1 IoCs

pid	Process
3528	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000c000000023b33-1.dat	upx
behavioral2/memory/3528-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/3528-6-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 1 IoCs

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

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3528	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2276 wrote to memory of 3528	2276	rundll32.exe	84
PID 2276 wrote to memory of 3528	2276	rundll32.exe	84
PID 2276 wrote to memory of 3528	2276	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\855507cd50c8ad2239a2dcbb10d7632f8d11c21451098872ae589d8117165f22.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2276
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\855507cd50c8ad2239a2dcbb10d7632f8d11c21451098872ae589d8117165f22.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  PID:3528

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Command and Control

Exfiltration

Impact

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/3528-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3528-6-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download