e517dfe38f7ef6b48c603f6faf2ecd9d6e16b91fdef12643f94500fdcd10e844

Analysis

max time kernel
141s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
31-12-2023 12:49

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General

Target

0002617c3b8b3829347678b0d945dd32.dll
Size

231KB
MD5

0002617c3b8b3829347678b0d945dd32
SHA1

5394a89eee0ecb131155c34e396f557614ba5091
SHA256

e517dfe38f7ef6b48c603f6faf2ecd9d6e16b91fdef12643f94500fdcd10e844
SHA512

752626c7ff0905261304972838188fbb96294e60efb710fe93a16a4e5a76600f3642019689b280e2d357bf615b1d2889ba7a7209d4d71cc443b973e995206900
SSDEEP

3072:zysX0WxnWd/IkmL+PViEbmzwtz/wk8YWb9:mskd/IkmuVfyWdM9

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\qyowkai = "{cea04c03-4628-9b7d-5739-4628c48b2748}"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
3248	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{cea04c03-4628-9b7d-5739-4628c48b2748}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{cea04c03-4628-9b7d-5739-4628c48b2748}\InprocServer32\ = "C:\\Windows\\SysWow64\\ltjrfvd.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{cea04c03-4628-9b7d-5739-4628c48b2748}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{cea04c03-4628-9b7d-5739-4628c48b2748}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{cea04c03-4628-9b7d-5739-4628c48b2748}\	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3248	rundll32.exe
3248	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3248	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3248	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2008 wrote to memory of 3248	2008	rundll32.exe	14
PID 2008 wrote to memory of 3248	2008	rundll32.exe	14
PID 2008 wrote to memory of 3248	2008	rundll32.exe	14

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\0002617c3b8b3829347678b0d945dd32.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:3248

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\0002617c3b8b3829347678b0d945dd32.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2008

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

C:\Windows\SysWOW64\dlbjxnv.dll

Filesize
92KB

MD5
121674b001365103f7b987a96ad91020

SHA1
53cb271ee591d90bf0453fce57638a69effdcfd2

SHA256
a89f7c48097eeb8cf5dfa0839894a657422987b0e7002c765dcbd00793f78ff9

SHA512
998fdd3b8357d8bf29712b2116a13ba8ca12a32f53ba5e8c0876e9f4289c03c133266c0b61350aaea7d2097d6036f70f68878c06d4e11be2c6ffff7e3ec51fc0

Download Submit
memory/3248-7-0x00000000778A0000-0x000000007791A000-memory.dmp

Filesize
488KB

Download
memory/3248-6-0x0000000000400000-0x0000000000443000-memory.dmp

Filesize
268KB

Download
memory/3248-11-0x00000000778A0000-0x000000007791A000-memory.dmp

Filesize
488KB

Download
memory/3248-10-0x0000000000400000-0x0000000000443000-memory.dmp

Filesize
268KB

Download