dc23dc10b1312038a6da0b1c937d241152492b67352df62f21105e56cec46b37

Analysis

max time kernel
147s
max time network
120s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
29/12/2023, 19:04

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General

Target
012f5216576b9c5fb38b068159e7fdc3.dll
Size 236KB
Sample231229-xq1thafeck
SHA256 dc23dc10b1312038a6da0b1c937d241152492b67352df62f21105e56cec46b37
MD5 012f5216576b9c5fb38b068159e7fdc3
SHA1 a02e29719feb202604e11919ad23c9f562fbbc72
SHA512 04a54bacef615e2efd199bc428a81491eefa522c3adcd3feb9c72af9d65e08215854550827e93e1a180e7a91f089b1b44fcdd8713532c548b37815efe78e2b82
SSDEEP 1536:1dKaTHN2ymZ0ofa5uQm4V7HG8ldINh+RhFtFftCgpcGO5lPf/XG8GmGwktbt:1Y4tIQG8XAmbFfaGc1fawk1t
MD5 SHA1 SHA512 SSDEEP

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\jedymfz = "{5cd62df8-d45e-29a3-e56f-d45ea570239c}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
1892	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5cd62df8-d45e-29a3-e56f-d45ea570239c}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5cd62df8-d45e-29a3-e56f-d45ea570239c}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5cd62df8-d45e-29a3-e56f-d45ea570239c}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5cd62df8-d45e-29a3-e56f-d45ea570239c}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5cd62df8-d45e-29a3-e56f-d45ea570239c}\InprocServer32\ = "C:\\Windows\\SysWow64\\ezythau.dll"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1892	rundll32.exe
1892	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1892	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1892	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2272 wrote to memory of 1892	2272	rundll32.exe	16
PID 2272 wrote to memory of 1892	2272	rundll32.exe	16
PID 2272 wrote to memory of 1892	2272	rundll32.exe	16

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\012f5216576b9c5fb38b068159e7fdc3.dll,#1
1⤵
- 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:1892

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\012f5216576b9c5fb38b068159e7fdc3.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2272

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

memory/1892-9-0x0000000075C10000-0x0000000075C8A000-memory.dmp

Download

memory/1892-1-0x0000000000400000-0x0000000000444000-memory.dmp

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memory/1892-11-0x0000000075C10000-0x0000000075C8A000-memory.dmp

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memory/1892-10-0x0000000000400000-0x0000000000444000-memory.dmp

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