59ca44cd264660de2e9c2fce383bde9cdab3fe4fa6fa9bfe854be43d79bc2990

Analysis

max time kernel
119s
max time network
124s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
24-12-2023 17:49

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General

Target

0975930ef01b5a5a4fda0c8b250ceeb0.dll
Size

236KB
MD5

0975930ef01b5a5a4fda0c8b250ceeb0
SHA1

270a03abeaacd652307de5f1f7e60a3cb21b651d
SHA256

59ca44cd264660de2e9c2fce383bde9cdab3fe4fa6fa9bfe854be43d79bc2990
SHA512

67fd2ec7785632c6b708ac19e531f5e40b419b3cbbb7592d0242f4cdcaeea46e69724fecfc91d4fae135db33956ecf156389acdda99edb8acf5ab7f9d88f7e1d
SSDEEP

3072:SeqmgHwlaazN9U3J+P0wFp+bLrt2wkkIy:+Qj9U3jwO3rt59

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\lavvepxyo = "{3c71a3fe-b4f9-094e-c50a-b4f92b7682f0}"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
1720	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3c71a3fe-b4f9-094e-c50a-b4f92b7682f0}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3c71a3fe-b4f9-094e-c50a-b4f92b7682f0}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3c71a3fe-b4f9-094e-c50a-b4f92b7682f0}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3c71a3fe-b4f9-094e-c50a-b4f92b7682f0}\InprocServer32\ = "C:\\Windows\\SysWow64\\gvqqzkstj.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3c71a3fe-b4f9-094e-c50a-b4f92b7682f0}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1720	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1720	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1720	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 700 wrote to memory of 1720	700	rundll32.exe	28
PID 700 wrote to memory of 1720	700	rundll32.exe	28
PID 700 wrote to memory of 1720	700	rundll32.exe	28
PID 700 wrote to memory of 1720	700	rundll32.exe	28
PID 700 wrote to memory of 1720	700	rundll32.exe	28
PID 700 wrote to memory of 1720	700	rundll32.exe	28
PID 700 wrote to memory of 1720	700	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\0975930ef01b5a5a4fda0c8b250ceeb0.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:700
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\0975930ef01b5a5a4fda0c8b250ceeb0.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:1720

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

\Windows\SysWOW64\yniircklb.dll

Filesize
64KB

MD5
337f04a62da7f3a3a4451ef6d773c779

SHA1
03130b44b6731397ed33c0eb91ff7634b084ffff

SHA256
d3ff303e56c8474d63859d291ef529a45e8b16d23ca5128e0627a4c5feacb3b4

SHA512
c4550e9abf841e0fbfdf91d3b47a5759d6e7a36e8d6bb889644aa83b7d402c85d87c2ba94573953da30f431373f898caaf06bdbd06a392460a8a7eadf645d3c8

Download Submit
memory/1720-1-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/1720-8-0x0000000076090000-0x0000000076130000-memory.dmp

Filesize
640KB

Download
memory/1720-9-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/1720-10-0x0000000076090000-0x0000000076130000-memory.dmp

Filesize
640KB

Download