9420b0e5f978257cb1e95414cab51da427b69dee64a8cf1f00e2829a3fe84f34

Analysis

max time kernel
16s
max time network
34s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
01-12-2022 01:04

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General

Target

9420b0e5f978257cb1e95414cab51da427b69dee64a8cf1f00e2829a3fe84f34.dll
Size

236KB
MD5

fdb22b5c1a29a78b90651822686b3cb0
SHA1

a296c7736d0687c14a68fdb3f687ec9a4fe95236
SHA256

9420b0e5f978257cb1e95414cab51da427b69dee64a8cf1f00e2829a3fe84f34
SHA512

7c2af6a6ebc250bd88ff669d26c8840b770c954fde3ab2206f9b9bd03f5b38932bf17b35b5afd11376fe809f810ff37ab881e5e0c17dd120640fc156ae223e4f
SSDEEP

3072:SeqmgHwlaazN9U3J+P0wFp+bLrt2wkkIv:+Qj9U3jwO3rt5s

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\xnqqioh = "{3fc006b3-b748-0c9d-c859-b7488e3bcf66}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
904	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3fc006b3-b748-0c9d-c859-b7488e3bcf66}\InprocServer32\ = "C:\\Windows\\SysWow64\\silldjc.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3fc006b3-b748-0c9d-c859-b7488e3bcf66}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3fc006b3-b748-0c9d-c859-b7488e3bcf66}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3fc006b3-b748-0c9d-c859-b7488e3bcf66}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3fc006b3-b748-0c9d-c859-b7488e3bcf66}\InprocServer32	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
904	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	904	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
904	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1332 wrote to memory of 904	1332	rundll32.exe	28
PID 1332 wrote to memory of 904	1332	rundll32.exe	28
PID 1332 wrote to memory of 904	1332	rundll32.exe	28
PID 1332 wrote to memory of 904	1332	rundll32.exe	28
PID 1332 wrote to memory of 904	1332	rundll32.exe	28
PID 1332 wrote to memory of 904	1332	rundll32.exe	28
PID 1332 wrote to memory of 904	1332	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\9420b0e5f978257cb1e95414cab51da427b69dee64a8cf1f00e2829a3fe84f34.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1332
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\9420b0e5f978257cb1e95414cab51da427b69dee64a8cf1f00e2829a3fe84f34.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:904

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

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Downloads

\Windows\SysWOW64\kaddvbu.dll

Filesize
625KB

MD5
95e2376b3323f062eb562b8586d0f14a

SHA1
453d4c3bf4a489433b593420a37bbffb7749875a

SHA256
bd3fa8750123d00aa0967fba44372c46ea002681da9c9b77a4f9261553e26017

SHA512
b898603d07a49237e4dfc6872d5caa7616bae1258926f10e66c4d3f0d81cccefac1e844395b65bb1f308fbc022061b52e51f60658d0a546c04b365b3428cc87d

Download Submit
memory/904-54-0x0000000000000000-mapping.dmp

Download
memory/904-55-0x0000000075351000-0x0000000075353000-memory.dmp

Filesize
8KB

Download
memory/904-58-0x0000000000150000-0x0000000000194000-memory.dmp

Filesize
272KB

Download