654d6cb94de6ecd5fbd28c0aa97c3b6f5e7816025a2ede4336e0cd81591562ae

Analysis

max time kernel
94s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
04/10/2024, 20:05

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General

Target

654d6cb94de6ecd5fbd28c0aa97c3b6f5e7816025a2ede4336e0cd81591562aeN.dll
Size

236KB
MD5

004123eafb9d331ac75cb40824a70630
SHA1

14cf4904b3d02e05c34ccc727406c0c6a82f7e7f
SHA256

654d6cb94de6ecd5fbd28c0aa97c3b6f5e7816025a2ede4336e0cd81591562ae
SHA512

256d4a7906a218604753556bffa9df170fcd80aee892bce7a8938486f81964a4abae5faefde60b3e71a570e900c9dbfa9af72943286e4073d1a13b4a24055e97
SSDEEP

1536:Iguo2K86vta10RJQYPIHL+D5IWhxRh/Ci4ucg3/+k5ltr+DRPG8Gz7wk+cQvMe:Go256vS0RJAL+lHPKi40+66iwkD0F

Score

10^/10

discovery 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\pdwhz = "{ff039dcc-778b-ccd0-889c-778b1544b5bb}"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2636	rundll32.exe

Drops file in System32 directory 4 IoCs

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

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ff039dcc-778b-ccd0-889c-778b1544b5bb}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ff039dcc-778b-ccd0-889c-778b1544b5bb}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ff039dcc-778b-ccd0-889c-778b1544b5bb}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ff039dcc-778b-ccd0-889c-778b1544b5bb}\InprocServer32\ = "C:\\Windows\\SysWow64\\kyrcu.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ff039dcc-778b-ccd0-889c-778b1544b5bb}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2636	rundll32.exe
2636	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2636	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2636	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4816 wrote to memory of 2636	4816	rundll32.exe	82
PID 4816 wrote to memory of 2636	4816	rundll32.exe	82
PID 4816 wrote to memory of 2636	4816	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\654d6cb94de6ecd5fbd28c0aa97c3b6f5e7816025a2ede4336e0cd81591562aeN.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4816
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\654d6cb94de6ecd5fbd28c0aa97c3b6f5e7816025a2ede4336e0cd81591562aeN.dll,#1
  2⤵
  - Adds autorun key to be loaded by Explorer.exe on startup
  - Loads dropped DLL
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2636

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\cqjum.dll

Filesize
478KB

MD5
e99416267b61f52fa5ab994019efd359

SHA1
86d31eae707db7fe51d2556394fcf0e8e9f6b0fd

SHA256
768c286674371564b5e6095edb56e0a4231f341be895da69cfccca5160029774

SHA512
0a1c7579a9c787c2c1bef35f0660e72e74b42824e14ebea63b87ed25ddaf107e3746567bb431cab41a2f6719fad2c22d96e0715a1fe085d75805d7d66f7f05ae

Download Submit
memory/2636-0-0x0000000001EA0000-0x0000000001EE4000-memory.dmp

Filesize
272KB

Download
memory/2636-1-0x0000000001EA1000-0x0000000001EA8000-memory.dmp

Filesize
28KB

Download
memory/2636-8-0x0000000001EA0000-0x0000000001EE4000-memory.dmp

Filesize
272KB

Download
memory/2636-9-0x0000000001EA0000-0x0000000001EE4000-memory.dmp

Filesize
272KB

Download
memory/2636-12-0x0000000001EA0000-0x0000000001EE4000-memory.dmp

Filesize
272KB

Download