e0ca68f3cc2b8977aa07387c8492a06581db85275c5b68205036780a2d5a8099

Analysis

max time kernel
120s
max time network
124s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
24/12/2023, 16:28

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General

Target

05b451c94a1d87800d3d100f59f26ca7.dll
Size

236KB
MD5

05b451c94a1d87800d3d100f59f26ca7
SHA1

cb66ca4280c50bff4bbd0db1c7cf64f7cc0f61f7
SHA256

e0ca68f3cc2b8977aa07387c8492a06581db85275c5b68205036780a2d5a8099
SHA512

950ee1da6b5f75605f20ac4c287f8551148f6d72d8c3bdf32fc8d5ca3f4603e05a36cb08301a783bad7c48beee3b19d4e1b0192f072d931c2745ce3fa1a6b2d4
SSDEEP

1536:Iguo2K86vta10RJQYPIHL+D5IWhxRh/Ci4ucg3/+k5ltr+DRPG8Gz7wk+cQvMh:Go256vS0RJAL+lHPKi40+66iwkD0q

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
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\cjsll = "{e903b5d4-618b-b6d0-729c-618b3d5cca8a}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2172	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{e903b5d4-618b-b6d0-729c-618b3d5cca8a}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{e903b5d4-618b-b6d0-729c-618b3d5cca8a}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{e903b5d4-618b-b6d0-729c-618b3d5cca8a}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{e903b5d4-618b-b6d0-729c-618b3d5cca8a}\InprocServer32\ = "C:\\Windows\\SysWow64\\xengg.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{e903b5d4-618b-b6d0-729c-618b3d5cca8a}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2172	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2172	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2172	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1064 wrote to memory of 2172	1064	rundll32.exe	28
PID 1064 wrote to memory of 2172	1064	rundll32.exe	28
PID 1064 wrote to memory of 2172	1064	rundll32.exe	28
PID 1064 wrote to memory of 2172	1064	rundll32.exe	28
PID 1064 wrote to memory of 2172	1064	rundll32.exe	28
PID 1064 wrote to memory of 2172	1064	rundll32.exe	28
PID 1064 wrote to memory of 2172	1064	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\05b451c94a1d87800d3d100f59f26ca7.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1064
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\05b451c94a1d87800d3d100f59f26ca7.dll,#1
  2⤵
  - 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:2172

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

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Downloads

\Windows\SysWOW64\pwfyy.dll

Filesize
39KB

MD5
5a4e8be451843f8d97af2dbed97e83a3

SHA1
0991bf9aebcee9d587e40132e63e2903d42286e2

SHA256
71d7c13ca5b582db91e432cb8297ab2c22fb9807b3b7c665dbcb377e70a37753

SHA512
a63c750b1303d8b9b11acde62100b9da3e63c783ee86c9f7f8f5e83c0eb51d832d8958db99afe62202efc76894d403c6d6967e6f2413fe3a95353a23c52f1c48

Download Submit
memory/2172-0-0x0000000000230000-0x0000000000274000-memory.dmp

Filesize
272KB

Download
memory/2172-9-0x0000000074E30000-0x0000000074ED0000-memory.dmp

Filesize
640KB

Download
memory/2172-2-0x0000000000230000-0x0000000000274000-memory.dmp

Filesize
272KB

Download
memory/2172-11-0x0000000074E30000-0x0000000074ED0000-memory.dmp

Filesize
640KB

Download
memory/2172-10-0x0000000000230000-0x0000000000274000-memory.dmp

Filesize
272KB

Download