e19a87d55e0edfcda9438310e10a004fcbb8e9946d3ca722ea21ab33aa24dbd9

Analysis

max time kernel
120s
max time network
144s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
25/12/2023, 04:00

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General

Target

04538fda51509985af0682a14a2f3d0a.dll
Size

236KB
MD5

04538fda51509985af0682a14a2f3d0a
SHA1

8fa9a42fdc310570f296e3b5773a36057b276bfa
SHA256

e19a87d55e0edfcda9438310e10a004fcbb8e9946d3ca722ea21ab33aa24dbd9
SHA512

e14d3b5839539c194653cf619d101721f43024141960e52877b048d1fa7a2e7cd8066d394100e9acd975b465447a3ab791e4039d5376a3b1b1f50bb467a8fa8f
SSDEEP

1536:1dKaTHN2ymZ0ofa5uQm4V7HG8ldINh+RhFtFftCgpcGO5lPf/XG8GmGwktb4:1Y4tIQG8XAmbFfaGc1fawk14

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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\yuz = "{c2f924e7-4a71-9fc6-5b82-4a71ac6f5cb7}"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
1392	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c2f924e7-4a71-9fc6-5b82-4a71ac6f5cb7}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c2f924e7-4a71-9fc6-5b82-4a71ac6f5cb7}\InprocServer32\ = "C:\\Windows\\SysWow64\\tpu.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c2f924e7-4a71-9fc6-5b82-4a71ac6f5cb7}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c2f924e7-4a71-9fc6-5b82-4a71ac6f5cb7}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c2f924e7-4a71-9fc6-5b82-4a71ac6f5cb7}\	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1392	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1392	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1392	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1968 wrote to memory of 1392	1968	rundll32.exe	28
PID 1968 wrote to memory of 1392	1968	rundll32.exe	28
PID 1968 wrote to memory of 1392	1968	rundll32.exe	28
PID 1968 wrote to memory of 1392	1968	rundll32.exe	28
PID 1968 wrote to memory of 1392	1968	rundll32.exe	28
PID 1968 wrote to memory of 1392	1968	rundll32.exe	28
PID 1968 wrote to memory of 1392	1968	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\04538fda51509985af0682a14a2f3d0a.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1968
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\04538fda51509985af0682a14a2f3d0a.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:1392

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

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Downloads

\Windows\SysWOW64\lhm.dll

Filesize
190KB

MD5
ca4847d2e7582f35adfbf0730ae8eb10

SHA1
d0d4f5fadc52f856fd8a75f3c6e5b79d36e9c9e0

SHA256
5179dac1c13df85187b3f3a4e6711faf357608943da16ca732eea6ac6270003b

SHA512
8fc07776d0295fad4f6906ab86b40240e5ea607d5ce284d41d14382c51f7cbdeff1294de5726d428dd1d61b65896acdaedb2a139a7b92a1ce74bd78368fbceec

Download Submit
memory/1392-0-0x0000000000200000-0x0000000000244000-memory.dmp

Filesize
272KB

Download
memory/1392-2-0x0000000000200000-0x0000000000244000-memory.dmp

Filesize
272KB

Download
memory/1392-9-0x0000000075810000-0x00000000758B0000-memory.dmp

Filesize
640KB

Download
memory/1392-10-0x0000000000200000-0x0000000000244000-memory.dmp

Filesize
272KB

Download
memory/1392-11-0x0000000075810000-0x00000000758B0000-memory.dmp

Filesize
640KB

Download