5c71860b53748f5cc3ff9ce9c75d0935490df4da64719fdc5b911f801513cb87

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/03/2024, 06:58

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General

Target

5c71860b53748f5cc3ff9ce9c75d0935490df4da64719fdc5b911f801513cb87.dll
Size

216KB
MD5

16501b724c568899632215d75db5b25f
SHA1

6dc4cfccce75f2a3d221a354b0fd003b9e263f8d
SHA256

5c71860b53748f5cc3ff9ce9c75d0935490df4da64719fdc5b911f801513cb87
SHA512

376ec7897601de6cd9a1da350baaf9d5adf0447ece159c007fe05a3a871fa3fd2a0c9c42249cad28da39e17d65cbd92615a88466bcd07b1fef62f901ac6301fc
SSDEEP

3072:ynk6ZvS0KmKAakQXMVRAgv7TA+XImL2lQBV+UdE+rECWp7hK9eGg:yk6o00AavXMVfziqBV+UdvrEFp7hK9o

Score

8^/10

persistence upx

Malware Config

Signatures

Blocklisted process makes network request 2 IoCs

flow	pid	Process
15	4680	rundll32.exe
19	4680	rundll32.exe

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/0x000e000000023139-3.dat	acprotect

Loads dropped DLL 2 IoCs

pid	Process
4680	rundll32.exe
4680	rundll32.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4680-6-0x0000000001520000-0x0000000001550000-memory.dmp	upx
behavioral2/files/0x000e000000023139-3.dat	upx
behavioral2/memory/4680-7-0x0000000001520000-0x0000000001550000-memory.dmp	upx
behavioral2/memory/4680-19-0x0000000001520000-0x0000000001550000-memory.dmp	upx

Enumerates connected drives 3 TTPs 1 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\e:	rundll32.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	rundll32.exe
File created	\??\c:\program files\common files\system\symsrv.dll.000	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4140	4680	WerFault.exe	86

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4680	rundll32.exe
4680	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4680	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4396 wrote to memory of 4680	4396	rundll32.exe	86
PID 4396 wrote to memory of 4680	4396	rundll32.exe	86
PID 4396 wrote to memory of 4680	4396	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5c71860b53748f5cc3ff9ce9c75d0935490df4da64719fdc5b911f801513cb87.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4396
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\5c71860b53748f5cc3ff9ce9c75d0935490df4da64719fdc5b911f801513cb87.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Loads dropped DLL
  - Enumerates connected drives
  - Drops file in Program Files directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4680
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4680 -s 576
    3⤵
    - Program crash
    PID:4140

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4680 -ip 4680
1⤵
PID:2396

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

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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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/4680-6-0x0000000001520000-0x0000000001550000-memory.dmp

Filesize
192KB

Download
memory/4680-7-0x0000000001520000-0x0000000001550000-memory.dmp

Filesize
192KB

Download
memory/4680-8-0x0000000010000000-0x0000000010028000-memory.dmp

Filesize
160KB

Download
memory/4680-15-0x0000000076920000-0x0000000076983000-memory.dmp

Filesize
396KB

Download
memory/4680-18-0x0000000076920000-0x0000000076983000-memory.dmp

Filesize
396KB

Download
memory/4680-19-0x0000000001520000-0x0000000001550000-memory.dmp

Filesize
192KB

Download