21b4f5539291f0a82a9815aa816427157ea050c6e343d590e59bc5a1851df186

Analysis

max time kernel
36s
max time network
42s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
05/12/2022, 15:34

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

21b4f5539291f0a82a9815aa816427157ea050c6e343d590e59bc5a1851df186.dll
Size

237KB
MD5

3d801aca03997af3be614461a69b21e0
SHA1

aef9baed56172d6afe45045ff8f546d46ae5d0df
SHA256

21b4f5539291f0a82a9815aa816427157ea050c6e343d590e59bc5a1851df186
SHA512

91133765b856c3e7c3aab8d0d52a8581ed5459ea8ae7a17ab71b0dad23aea4ffbe3dab36e271b46cfb4f825bbf457399416f137baf73e27eab84d94c2faf81ad
SSDEEP

1536:ah3I3Y/OmZWgu8ghI8ANLPc6JTLxvolgBwjhIHOiAwKhgOeS/5/IhnGcG7wkIZ:ah3PDghILPcAvoawjXbwPSx/Iuwk8

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

T1060

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\wyhuf = "{c2f2f099-4a7a-9fcf-5b8b-4a7a78115c86}"	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
1968	rundll32.exe
1968	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c2f2f099-4a7a-9fcf-5b8b-4a7a78115c86}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c2f2f099-4a7a-9fcf-5b8b-4a7a78115c86}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c2f2f099-4a7a-9fcf-5b8b-4a7a78115c86}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c2f2f099-4a7a-9fcf-5b8b-4a7a78115c86}\InprocServer32\ = "C:\\Windows\\SysWow64\\rtcpa.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c2f2f099-4a7a-9fcf-5b8b-4a7a78115c86}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1968	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2000 wrote to memory of 1968	2000	rundll32.exe	26
PID 2000 wrote to memory of 1968	2000	rundll32.exe	26
PID 2000 wrote to memory of 1968	2000	rundll32.exe	26
PID 2000 wrote to memory of 1968	2000	rundll32.exe	26
PID 2000 wrote to memory of 1968	2000	rundll32.exe	26
PID 2000 wrote to memory of 1968	2000	rundll32.exe	26
PID 2000 wrote to memory of 1968	2000	rundll32.exe	26

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\21b4f5539291f0a82a9815aa816427157ea050c6e343d590e59bc5a1851df186.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2000
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\21b4f5539291f0a82a9815aa816427157ea050c6e343d590e59bc5a1851df186.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:1968

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

\Windows\SysWOW64\jluhs.dll

Filesize
625KB

MD5
95e2376b3323f062eb562b8586d0f14a

SHA1
453d4c3bf4a489433b593420a37bbffb7749875a

SHA256
bd3fa8750123d00aa0967fba44372c46ea002681da9c9b77a4f9261553e26017

SHA512
b898603d07a49237e4dfc6872d5caa7616bae1258926f10e66c4d3f0d81cccefac1e844395b65bb1f308fbc022061b52e51f60658d0a546c04b365b3428cc87d

Download Submit
\Windows\SysWOW64\vxgte.dll

Filesize
1.1MB

MD5
9b98d47916ead4f69ef51b56b0c2323c

SHA1
290a80b4ded0efc0fd00816f373fcea81a521330

SHA256
96e0ae104c9662d0d20fdf59844c2d18334e5847b6c4fc7f8ce4b3b87f39887b

SHA512
68b67021f228d8d71df4deb0b6388558b2f935a6aa466a12199cd37ada47ee588ea407b278d190d3a498b0ef3f5f1a2573a469b7ea5561ab2e7055c45565fe94

Download Submit
memory/1968-55-0x00000000754E1000-0x00000000754E3000-memory.dmp

Filesize
8KB

Download
memory/1968-56-0x00000000001F0000-0x0000000000235000-memory.dmp

Filesize
276KB

Download
memory/1968-58-0x00000000001F0000-0x0000000000235000-memory.dmp

Filesize
276KB

Download
memory/1968-60-0x00000000001F0000-0x0000000000235000-memory.dmp

Filesize
276KB

Download