6e8021ddb6a2eb0d344a163fc227c1d1da4cbfc9fd8552f378bcfab7a5070956

Analysis

max time kernel
39s
max time network
83s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
01/01/2024, 15:21

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General

Target

3d32fcc04d0d662d9c7d300c61cf041b.dll
Size

38KB
MD5

3d32fcc04d0d662d9c7d300c61cf041b
SHA1

68f439aed985223c3c5296e53884c5fddcef5de5
SHA256

6e8021ddb6a2eb0d344a163fc227c1d1da4cbfc9fd8552f378bcfab7a5070956
SHA512

fffff6d14f6934ed070e62f71e22e6485f9f8e7af6b97b6ca0321afb7147a1656610fc66a2302166f575854d14c119e8eb7cd86597542ef30c89c6249ca0cb14
SSDEEP

768:G0o1fFX4Cem+5446wgH2l9SjPMYqR4f2HGRz887i:C1p4CSX3na09R4eHsz887i

Score

7^/10

persistence upx

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
4576	rundll32.exe
4576	rundll32.exe
4556	rundll32.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4576-2-0x0000000010000000-0x000000001001C000-memory.dmp	upx
behavioral2/memory/4576-9-0x0000000002C90000-0x0000000002CAC000-memory.dmp	upx
behavioral2/memory/4576-0-0x0000000010000000-0x000000001001C000-memory.dmp	upx
behavioral2/memory/4556-16-0x0000000010000000-0x000000001001C000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 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\Run\MSServer = "rundll32.exe C:\\Windows\\system32\\jkkKawvU.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

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

Modifies registry class 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7DB094B1-C3AA-487C-B75E-CB9654E1A6B4}\InprocServer32\ThreadingModel = "Both"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7DB094B1-C3AA-487C-B75E-CB9654E1A6B4}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7DB094B1-C3AA-487C-B75E-CB9654E1A6B4}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7DB094B1-C3AA-487C-B75E-CB9654E1A6B4}\InprocServer32\ = "C:\\Windows\\SysWow64\\jkkKawvU.dll"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
4576	rundll32.exe
4576	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe
4556	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4576	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4576	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4576	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 868 wrote to memory of 4576	868	rundll32.exe	14
PID 868 wrote to memory of 4576	868	rundll32.exe	14
PID 868 wrote to memory of 4576	868	rundll32.exe	14
PID 4576 wrote to memory of 620	4576	rundll32.exe	5
PID 4576 wrote to memory of 4556	4576	rundll32.exe	102
PID 4576 wrote to memory of 4556	4576	rundll32.exe	102
PID 4576 wrote to memory of 4556	4576	rundll32.exe	102

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:620

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3d32fcc04d0d662d9c7d300c61cf041b.dll,#1
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4576
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Windows\system32\jkkKawvU.dll,a
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  PID:4556

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3d32fcc04d0d662d9c7d300c61cf041b.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:868

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

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Downloads

memory/4556-16-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/4556-17-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/4576-2-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download
memory/4576-9-0x0000000002C90000-0x0000000002CAC000-memory.dmp

Filesize
112KB

Download
memory/4576-1-0x0000000001060000-0x0000000001061000-memory.dmp

Filesize
4KB

Download
memory/4576-0-0x0000000010000000-0x000000001001C000-memory.dmp

Filesize
112KB

Download