b98f99e05b83715803c641ecf3d3400b615c77ca2825808a09c808af1cb22e33

Analysis

max time kernel
108s
max time network
115s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
30-12-2023 06:20

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General

Target

10e971f60444151ff032510dc428e2b9.dll
Size

24KB
MD5

10e971f60444151ff032510dc428e2b9
SHA1

6ea7d5e1a2d3070949bcba0c53bb06faf0ffa8aa
SHA256

b98f99e05b83715803c641ecf3d3400b615c77ca2825808a09c808af1cb22e33
SHA512

d210f1bd46981fd94de31007b36397319c6a787dba5e0e2bd4945348be46a83444016dcd8a431251d3d0b5f7ab3a033be6d9b283b36cbd9eaf7f44c623996dd6
SSDEEP

384:BJGdF43Z4zRMuUlS0QzLJPmbfWtH464QHRsB14F9aqdRH4hdvXorg2yqxwcr0SFB:bGL43Z4z2DliLMWZ3U4FyX52yejkU

Score

7^/10

persistence

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
3064	rundll32.exe
3064	rundll32.exe
4740	rundll32.exe

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\\iifcYPJY.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

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

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BAFFE38C-C38F-421D-A619-854106535705}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BAFFE38C-C38F-421D-A619-854106535705}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BAFFE38C-C38F-421D-A619-854106535705}\InprocServer32\ = "C:\\Windows\\SysWow64\\iifcYPJY.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BAFFE38C-C38F-421D-A619-854106535705}\InprocServer32\ThreadingModel = "Both"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3064	rundll32.exe
3064	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe
4740	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
3064	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3064	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3064	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 936 wrote to memory of 3064	936	rundll32.exe	16
PID 936 wrote to memory of 3064	936	rundll32.exe	16
PID 936 wrote to memory of 3064	936	rundll32.exe	16
PID 3064 wrote to memory of 608	3064	rundll32.exe	86
PID 3064 wrote to memory of 4740	3064	rundll32.exe	101
PID 3064 wrote to memory of 4740	3064	rundll32.exe	101
PID 3064 wrote to memory of 4740	3064	rundll32.exe	101

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\10e971f60444151ff032510dc428e2b9.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:936
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\10e971f60444151ff032510dc428e2b9.dll,#1
  2⤵
  - 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:3064
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\iifcYPJY.dll,a
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    PID:4740

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:608

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\iifcYPJY.dll

Filesize
24KB

MD5
10e971f60444151ff032510dc428e2b9

SHA1
6ea7d5e1a2d3070949bcba0c53bb06faf0ffa8aa

SHA256
b98f99e05b83715803c641ecf3d3400b615c77ca2825808a09c808af1cb22e33

SHA512
d210f1bd46981fd94de31007b36397319c6a787dba5e0e2bd4945348be46a83444016dcd8a431251d3d0b5f7ab3a033be6d9b283b36cbd9eaf7f44c623996dd6

Download Submit
memory/3064-0-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/3064-1-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/3064-8-0x0000000001040000-0x0000000001052000-memory.dmp

Filesize
72KB

Download
memory/3064-9-0x0000000001040000-0x0000000001052000-memory.dmp

Filesize
72KB

Download
memory/4740-16-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/4740-17-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/4740-18-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download