a1ac847fa01929f1461d49526b16dc9e57a84cdc7b05497b978f7108b276e4b1

Analysis

max time kernel
43s
max time network
35s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
03-12-2022 16:23

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General

Target

a1ac847fa01929f1461d49526b16dc9e57a84cdc7b05497b978f7108b276e4b1.dll
Size

236KB
MD5

6236c6083defbba21e7ddca54ac36701
SHA1

e72302eab137a173007b732b422f7fba4cad93dd
SHA256

a1ac847fa01929f1461d49526b16dc9e57a84cdc7b05497b978f7108b276e4b1
SHA512

b005e56cb0b016acbf3d65a30967665ca6184f867ca163788fecf7acab4a0be3aeb4d18765971d540918803198661cfe4e6b30b8ed611865dd335af40f48ba96
SSDEEP

1536:Iguo2K86vta10RJQYPIHL+D5IWhxRh/Ci4ucg3/+k5ltr+DRPG8Gz7wk+cQvMJ:Go256vS0RJAL+lHPKi40+66iwkD0m

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

T1060

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\ahrkl = "{a79c9be1-2f14-7469-3025-2f141369026b}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
1736	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{a79c9be1-2f14-7469-3025-2f141369026b}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{a79c9be1-2f14-7469-3025-2f141369026b}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{a79c9be1-2f14-7469-3025-2f141369026b}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{a79c9be1-2f14-7469-3025-2f141369026b}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{a79c9be1-2f14-7469-3025-2f141369026b}\InprocServer32\ = "C:\\Windows\\SysWow64\\vcmfg.dll"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1736	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1736	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1736	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1380 wrote to memory of 1736	1380	rundll32.exe	28
PID 1380 wrote to memory of 1736	1380	rundll32.exe	28
PID 1380 wrote to memory of 1736	1380	rundll32.exe	28
PID 1380 wrote to memory of 1736	1380	rundll32.exe	28
PID 1380 wrote to memory of 1736	1380	rundll32.exe	28
PID 1380 wrote to memory of 1736	1380	rundll32.exe	28
PID 1380 wrote to memory of 1736	1380	rundll32.exe	28

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a1ac847fa01929f1461d49526b16dc9e57a84cdc7b05497b978f7108b276e4b1.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1380
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a1ac847fa01929f1461d49526b16dc9e57a84cdc7b05497b978f7108b276e4b1.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:1736

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Windows\SysWOW64\nuexy.dll

Filesize
625KB

MD5
95e2376b3323f062eb562b8586d0f14a

SHA1
453d4c3bf4a489433b593420a37bbffb7749875a

SHA256
bd3fa8750123d00aa0967fba44372c46ea002681da9c9b77a4f9261553e26017

SHA512
b898603d07a49237e4dfc6872d5caa7616bae1258926f10e66c4d3f0d81cccefac1e844395b65bb1f308fbc022061b52e51f60658d0a546c04b365b3428cc87d

Download Submit
memory/1736-54-0x0000000000000000-mapping.dmp

Download
memory/1736-55-0x0000000076041000-0x0000000076043000-memory.dmp

Filesize
8KB

Download
memory/1736-57-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/1736-58-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download