25ee8fff4e91d9742d4e2656b2f7b87e9477c352cfcda7e7af42b490bbd01505

Analysis

max time kernel
119s
max time network
125s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
25/12/2023, 14:33

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General

Target

25f8953a733a3d5bf8a2d56b12969122.dll
Size

236KB
MD5

25f8953a733a3d5bf8a2d56b12969122
SHA1

210143e5660a2d5e33a31d6023d3d10c141fa395
SHA256

25ee8fff4e91d9742d4e2656b2f7b87e9477c352cfcda7e7af42b490bbd01505
SHA512

790186f36f508e7cf8592375d5dc297dfeaee58dad0931d9869cefb6a312bc17b036c5560e16e7349bf7e873fa623b2bedbbcc1ea9ed8de2826855fb53f3c01e
SSDEEP

3072:SeqmgHwlaazN9U3J+P0wFp+bLrt2wkkIx:+Qj9U3jwO3rt5a

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\ueg = "{ca4d57dd-42c5-971a-53d6-42c5df556315}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
1948	rundll32.exe

Drops file in System32 directory 2 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ca4d57dd-42c5-971a-53d6-42c5df556315}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ca4d57dd-42c5-971a-53d6-42c5df556315}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ca4d57dd-42c5-971a-53d6-42c5df556315}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ca4d57dd-42c5-971a-53d6-42c5df556315}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{ca4d57dd-42c5-971a-53d6-42c5df556315}\InprocServer32\ = "C:\\Windows\\SysWow64\\pzb.dll"	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1948	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1452 wrote to memory of 1948	1452	rundll32.exe	28
PID 1452 wrote to memory of 1948	1452	rundll32.exe	28
PID 1452 wrote to memory of 1948	1452	rundll32.exe	28
PID 1452 wrote to memory of 1948	1452	rundll32.exe	28
PID 1452 wrote to memory of 1948	1452	rundll32.exe	28
PID 1452 wrote to memory of 1948	1452	rundll32.exe	28
PID 1452 wrote to memory of 1948	1452	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\25f8953a733a3d5bf8a2d56b12969122.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1452
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\25f8953a733a3d5bf8a2d56b12969122.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 use of SetWindowsHookEx
  PID:1948

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\hrt.dll

Filesize
384KB

MD5
343d2ba10b5b4bbd616a4775d551082c

SHA1
9a93bf9baf65f45d7f3b1e65eacb393ea24d091c

SHA256
9d37ac2d48a17ff6776e09e2042860af2a286bb9a6509abc00926393a4e822bf

SHA512
141a3455cc788472a89f8bc40387634cd04ea4f786519acd94e0ba536dfa2c3e4f4f50748b05b3bd92c92744ea0ed31e6a8ba335dcfe46f1bdf8421ec03f2e7f

Download Submit
memory/1948-0-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/1948-6-0x00000000767D0000-0x0000000076870000-memory.dmp

Filesize
640KB

Download
memory/1948-7-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads