e6f17321b8fedf1f399fb76e230e9912b754f7b306fd17aa04913f567c0e7331

Analysis

max time kernel
145s
max time network
192s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25/12/2023, 02:39

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General

Target

0074c924fa585040b8b615ad7758d83c.dll
Size

236KB
MD5

0074c924fa585040b8b615ad7758d83c
SHA1

bbfd64235d6d6747e5ba9d00958dd4824a27fe80
SHA256

e6f17321b8fedf1f399fb76e230e9912b754f7b306fd17aa04913f567c0e7331
SHA512

bdad621b99b0c54ec0239c3044355abaae3da227cf5f7f263c799381a98f283d3c3300609dd08606c817e41aefa7b3c853acf88535fdc84b2a29864e85245243
SSDEEP

1536:Iguo2K86vta10RJQYPIHL+D5IWhxRh/Ci4ucg3/+k5ltr+DRPG8Gz7wk+cQvMR:Go256vS0RJAL+lHPKi40+66iwkD0a

Score

10^/10

persistence

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\lumcutebu = "{5a284fa9-d2a0-27f5-e3b1-d2a0c7214b15}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2600	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\yhzphgroh.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\yhzphgroh.dll	rundll32.exe
File created	C:\Windows\SysWOW64\gphxpozwp.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\gphxpozwp.dll	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5a284fa9-d2a0-27f5-e3b1-d2a0c7214b15}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5a284fa9-d2a0-27f5-e3b1-d2a0c7214b15}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5a284fa9-d2a0-27f5-e3b1-d2a0c7214b15}\InprocServer32\ = "C:\\Windows\\SysWow64\\gphxpozwp.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5a284fa9-d2a0-27f5-e3b1-d2a0c7214b15}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5a284fa9-d2a0-27f5-e3b1-d2a0c7214b15}	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2600	rundll32.exe
2600	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2600	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2600	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4700 wrote to memory of 2600	4700	rundll32.exe	33
PID 4700 wrote to memory of 2600	4700	rundll32.exe	33
PID 4700 wrote to memory of 2600	4700	rundll32.exe	33

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\0074c924fa585040b8b615ad7758d83c.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4700
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\0074c924fa585040b8b615ad7758d83c.dll,#1
  2⤵
  - Adds autorun key to be loaded by Explorer.exe on startup
  - Loads dropped DLL
  - Drops file in System32 directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2600

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:\Windows\SysWOW64\yhzphgroh.dll

Filesize
478KB

MD5
e99416267b61f52fa5ab994019efd359

SHA1
86d31eae707db7fe51d2556394fcf0e8e9f6b0fd

SHA256
768c286674371564b5e6095edb56e0a4231f341be895da69cfccca5160029774

SHA512
0a1c7579a9c787c2c1bef35f0660e72e74b42824e14ebea63b87ed25ddaf107e3746567bb431cab41a2f6719fad2c22d96e0715a1fe085d75805d7d66f7f05ae

Download Submit
memory/2600-1-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2600-7-0x00000000774D0000-0x000000007754A000-memory.dmp

Filesize
488KB

Download
memory/2600-10-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2600-11-0x00000000774D0000-0x000000007754A000-memory.dmp

Filesize
488KB

Download