8b8bb430a6d80657603d885a10ab5e311b752effd314e9d83fe46382b8068e43

Analysis

max time kernel
140s
max time network
119s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
05-05-2024 01:41

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General

Target

8b8bb430a6d80657603d885a10ab5e311b752effd314e9d83fe46382b8068e43.dll
Size

182KB
MD5

4754cbba0894419b933fb1279b4346e3
SHA1

e26d15d4bda0dc042361d527092bffbca8e5f92d
SHA256

8b8bb430a6d80657603d885a10ab5e311b752effd314e9d83fe46382b8068e43
SHA512

7625fc3f74a585043e10f873846dabcd15162d4611bd779e6d84417f1ba46311730c3daa3c1d0bd3dba995eb79da9110e6015cfdeccc14f064724652678edfd1
SSDEEP

3072:7wqDtLba/zq0et+ui1yJkt2lQBV+UdE+rECWp7hK5qyD:0qxbxJiBV+UdvrEFp7hK5qyD

Score

9^/10

persistence upx

Malware Config

Signatures

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral1/files/0x000b0000000149f5-1.dat	UPX
behavioral1/memory/912-3-0x0000000010000000-0x0000000010030000-memory.dmp	UPX
behavioral1/memory/912-7-0x0000000010000000-0x0000000010030000-memory.dmp	UPX

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
behavioral1/files/0x000b0000000149f5-1.dat	acprotect

Loads dropped DLL 2 IoCs

pid	Process
912	rundll32.exe
1644	WerFault.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000b0000000149f5-1.dat	upx
behavioral1/memory/912-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/912-7-0x0000000010000000-0x0000000010030000-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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1644	912	WerFault.exe	28

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	912	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 824 wrote to memory of 912	824	rundll32.exe	28
PID 824 wrote to memory of 912	824	rundll32.exe	28
PID 824 wrote to memory of 912	824	rundll32.exe	28
PID 824 wrote to memory of 912	824	rundll32.exe	28
PID 824 wrote to memory of 912	824	rundll32.exe	28
PID 824 wrote to memory of 912	824	rundll32.exe	28
PID 824 wrote to memory of 912	824	rundll32.exe	28
PID 912 wrote to memory of 1644	912	rundll32.exe	29
PID 912 wrote to memory of 1644	912	rundll32.exe	29
PID 912 wrote to memory of 1644	912	rundll32.exe	29
PID 912 wrote to memory of 1644	912	rundll32.exe	29

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8b8bb430a6d80657603d885a10ab5e311b752effd314e9d83fe46382b8068e43.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:824
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\8b8bb430a6d80657603d885a10ab5e311b752effd314e9d83fe46382b8068e43.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:912
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 912 -s 332
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:1644

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

\Program Files\Common Files\System\symsrv.dll

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/912-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/912-6-0x0000000075490000-0x00000000754AC000-memory.dmp

Filesize
112KB

Download
memory/912-7-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download