d004703d8123c73a5f159d43c5052ae58c9cf67428bb0dded6f7bf4cd819ac35

Analysis

max time kernel
142s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
24/12/2023, 20:59

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General

Target

123922a75b3c652a02842ffcb351375e.dll
Size

74KB
MD5

123922a75b3c652a02842ffcb351375e
SHA1

bfbfe053c143e9100925e903b94be61fe67120ee
SHA256

d004703d8123c73a5f159d43c5052ae58c9cf67428bb0dded6f7bf4cd819ac35
SHA512

68bc75688a823a25037608ab9b31944443e16f69166103465e56d676a370adc9a71d7486cf673b9b7b297dd79b1c45c18acd7a791c40b809d26c70ca91a7b3b3
SSDEEP

1536:mDNWJE2vWZM+853elCFEFl0dl07tWogxohhXqSOBQ/:ms22gY53elCqk/07tWZxq9F/

Score

6^/10

persistence

Malware Config

Signatures

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\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Byekovec = "rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\123922a75b3c652a02842ffcb351375e.dll\",Startup"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
5804	rundll32.exe
5804	rundll32.exe
5804	rundll32.exe
5804	rundll32.exe
5804	rundll32.exe
5804	rundll32.exe
5804	rundll32.exe
5804	rundll32.exe
5804	rundll32.exe
5804	rundll32.exe
5804	rundll32.exe
5804	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4076 wrote to memory of 5804	4076	rundll32.exe	17
PID 4076 wrote to memory of 5804	4076	rundll32.exe	17
PID 4076 wrote to memory of 5804	4076	rundll32.exe	17
PID 5804 wrote to memory of 2312	5804	rundll32.exe	98
PID 5804 wrote to memory of 2312	5804	rundll32.exe	98
PID 5804 wrote to memory of 2312	5804	rundll32.exe	98

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\123922a75b3c652a02842ffcb351375e.dll,#1
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5804
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe "C:\Users\Admin\AppData\Local\Temp\123922a75b3c652a02842ffcb351375e.dll",iep
  2⤵
  PID:2312

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\123922a75b3c652a02842ffcb351375e.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4076

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/2312-18-0x0000000002A10000-0x0000000002A20000-memory.dmp

Filesize
64KB

Download
memory/2312-17-0x0000000002A10000-0x0000000002A20000-memory.dmp

Filesize
64KB

Download
memory/2312-11-0x0000000002A10000-0x0000000002A20000-memory.dmp

Filesize
64KB

Download
memory/2312-14-0x0000000010000000-0x0000000010015000-memory.dmp

Filesize
84KB

Download
memory/2312-12-0x0000000002A10000-0x0000000002A20000-memory.dmp

Filesize
64KB

Download
memory/5804-31-0x0000000010000000-0x0000000010015000-memory.dmp

Filesize
84KB

Download
memory/5804-6-0x0000000001560000-0x0000000001570000-memory.dmp

Filesize
64KB

Download
memory/5804-4-0x0000000010000000-0x0000000010015000-memory.dmp

Filesize
84KB

Download
memory/5804-2-0x0000000001560000-0x0000000001570000-memory.dmp

Filesize
64KB

Download
memory/5804-0-0x0000000010000000-0x0000000010015000-memory.dmp

Filesize
84KB

Download
memory/5804-3-0x0000000001560000-0x0000000001570000-memory.dmp

Filesize
64KB

Download
memory/5804-10-0x0000000010000000-0x0000000010015000-memory.dmp

Filesize
84KB

Download
memory/5804-7-0x0000000001560000-0x0000000001570000-memory.dmp

Filesize
64KB

Download
memory/5804-1-0x0000000010000000-0x0000000010015000-memory.dmp

Filesize
84KB

Download
memory/5804-25-0x0000000010000000-0x0000000010015000-memory.dmp

Filesize
84KB

Download
memory/5804-27-0x0000000010000000-0x0000000010015000-memory.dmp

Filesize
84KB

Download
memory/5804-13-0x0000000010000000-0x0000000010015000-memory.dmp

Filesize
84KB

Download
memory/5804-33-0x0000000010000000-0x0000000010015000-memory.dmp

Filesize
84KB

Download