e0ec988ff5aa09d8f065ea0329c9fe0cb3edd314176e33ce17d84cfd500220aa

Analysis

max time kernel
121s
max time network
124s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
25-12-2023 04:42

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

05cab8d020e7ed340a91f0baffe625b4.dll
Size

228KB
MD5

05cab8d020e7ed340a91f0baffe625b4
SHA1

747ecc64d89e36fa265b7f464aa16262031c598c
SHA256

e0ec988ff5aa09d8f065ea0329c9fe0cb3edd314176e33ce17d84cfd500220aa
SHA512

d0057dcda1817b381f45999be99903b88eecdbcaee4b5a5f853a337bd9ffebaae18db56ebd5a0a8660527e5efcea478e080d36d0286f7a328f4e29757521c113
SSDEEP

1536:sr2d69ukDbQqxohe5G33q33krCIhrRe+sTlgLq1u5Nf/BkKjG8GIPH7Lwk5mK+:i24lDbTxGe6q3Ud5sx18J/B7wk5i

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\mpeho = "{698345bc-e10b-3650-f21c-e10bcd34c464}"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
3036	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{698345bc-e10b-3650-f21c-e10bcd34c464}\InprocServer32\ = "C:\\Windows\\SysWow64\\hkzcj.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{698345bc-e10b-3650-f21c-e10bcd34c464}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{698345bc-e10b-3650-f21c-e10bcd34c464}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{698345bc-e10b-3650-f21c-e10bcd34c464}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{698345bc-e10b-3650-f21c-e10bcd34c464}\InprocServer32	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3036	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3036	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3036	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2036 wrote to memory of 3036	2036	rundll32.exe	28
PID 2036 wrote to memory of 3036	2036	rundll32.exe	28
PID 2036 wrote to memory of 3036	2036	rundll32.exe	28
PID 2036 wrote to memory of 3036	2036	rundll32.exe	28
PID 2036 wrote to memory of 3036	2036	rundll32.exe	28
PID 2036 wrote to memory of 3036	2036	rundll32.exe	28
PID 2036 wrote to memory of 3036	2036	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\05cab8d020e7ed340a91f0baffe625b4.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2036
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\05cab8d020e7ed340a91f0baffe625b4.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:3036

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

Replay Monitor

Loading Replay Monitor...

Downloads

\Windows\SysWOW64\zcrub.dll

Filesize
625KB

MD5
95e2376b3323f062eb562b8586d0f14a

SHA1
453d4c3bf4a489433b593420a37bbffb7749875a

SHA256
bd3fa8750123d00aa0967fba44372c46ea002681da9c9b77a4f9261553e26017

SHA512
b898603d07a49237e4dfc6872d5caa7616bae1258926f10e66c4d3f0d81cccefac1e844395b65bb1f308fbc022061b52e51f60658d0a546c04b365b3428cc87d

Download Submit
memory/3036-0-0x00000000001D0000-0x0000000000211000-memory.dmp

Filesize
260KB

Download
memory/3036-2-0x00000000001D0000-0x0000000000211000-memory.dmp

Filesize
260KB

Download
memory/3036-7-0x00000000757C0000-0x0000000075860000-memory.dmp

Filesize
640KB

Download
memory/3036-10-0x00000000001D0000-0x0000000000211000-memory.dmp

Filesize
260KB

Download
memory/3036-11-0x00000000757C0000-0x0000000075860000-memory.dmp

Filesize
640KB

Download