21b4f5539291f0a82a9815aa816427157ea050c6e343d590e59bc5a1851df186

Analysis

max time kernel
150s
max time network
195s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
05/12/2022, 15:34

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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\zvzclzc = "{b39015a5-3b18-806d-4c29-3b189d2df127}"	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
2744	rundll32.exe
2744	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{b39015a5-3b18-806d-4c29-3b189d2df127}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{b39015a5-3b18-806d-4c29-3b189d2df127}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{b39015a5-3b18-806d-4c29-3b189d2df127}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{b39015a5-3b18-806d-4c29-3b189d2df127}\InprocServer32\ = "C:\\Windows\\SysWow64\\uquxgux.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{b39015a5-3b18-806d-4c29-3b189d2df127}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2744	rundll32.exe
2744	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2744	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2744	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1924 wrote to memory of 2744	1924	rundll32.exe	83
PID 1924 wrote to memory of 2744	1924	rundll32.exe	83
PID 1924 wrote to memory of 2744	1924	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\21b4f5539291f0a82a9815aa816427157ea050c6e343d590e59bc5a1851df186.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1924
- 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 behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2744

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

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Downloads

C:\Windows\SysWOW64\mimpymp.dll

Filesize
478KB

MD5
e99416267b61f52fa5ab994019efd359

SHA1
86d31eae707db7fe51d2556394fcf0e8e9f6b0fd

SHA256
768c286674371564b5e6095edb56e0a4231f341be895da69cfccca5160029774

SHA512
0a1c7579a9c787c2c1bef35f0660e72e74b42824e14ebea63b87ed25ddaf107e3746567bb431cab41a2f6719fad2c22d96e0715a1fe085d75805d7d66f7f05ae

Download Submit
C:\Windows\SysWOW64\yuybkyb.dll

Filesize
625KB

MD5
eccf28d7e5ccec24119b88edd160f8f4

SHA1
98509587a3d37a20b56b50fd57f823a1691a034c

SHA256
820c83c0533cfce2928e29edeaf6c255bc19ac9718b25a5656d99ffac30a03d6

SHA512
c1c94bbb781625b2317f0a8178d3a10d891fb71bca8f82cd831c484e8ab125301b82a14fe2ff070dc99a496cc00234300fa5536401018c40d49d44ae89409670

Download Submit
memory/2744-135-0x0000000000400000-0x0000000000445000-memory.dmp

Filesize
276KB

Download
memory/2744-136-0x0000000000400000-0x0000000000445000-memory.dmp

Filesize
276KB

Download