bb47f558d7d21602d571a1fbfa82060f202b9d8314595bd3aa8f50f70916d998

Analysis

max time kernel
161s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
05/12/2022, 07:37

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General

Target

bb47f558d7d21602d571a1fbfa82060f202b9d8314595bd3aa8f50f70916d998.dll
Size

25KB
MD5

389e567712c4d6fb2bee03fdb6bce6db
SHA1

69350cd869ecd93a025d419e4800a4e576080c1c
SHA256

bb47f558d7d21602d571a1fbfa82060f202b9d8314595bd3aa8f50f70916d998
SHA512

6b2744fafab07315817aac2bf5ed653a4448aee6c902e10c7a438754690a19387c643ed18e35b06fe7ac875a702e6b318c3c83275eb79a02351f097c4453f70a
SSDEEP

768:rxmWnNKqJgEd4wRejWPYBZs1ijS2lq31s:rxmWNHJR4QeckXjS2li1s

Score

7^/10

persistence

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
1276	rundll32.exe
1276	rundll32.exe
2688	rundll32.exe

Adds Run key to start application 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\Run\	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSServer = "rundll32.exe C:\\Windows\\system32\\opnlLCsq.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

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

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{149813CF-AFC1-4AC2-A404-B8AA402F323A}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{149813CF-AFC1-4AC2-A404-B8AA402F323A}\InprocServer32\ = "C:\\Windows\\SysWow64\\opnlLCsq.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{149813CF-AFC1-4AC2-A404-B8AA402F323A}\InprocServer32\ThreadingModel = "Both"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{149813CF-AFC1-4AC2-A404-B8AA402F323A}	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1276	rundll32.exe
1276	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe
2688	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1276	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1276	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1276	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3132 wrote to memory of 1276	3132	rundll32.exe	81
PID 3132 wrote to memory of 1276	3132	rundll32.exe	81
PID 3132 wrote to memory of 1276	3132	rundll32.exe	81
PID 1276 wrote to memory of 576	1276	rundll32.exe	2
PID 1276 wrote to memory of 2688	1276	rundll32.exe	83
PID 1276 wrote to memory of 2688	1276	rundll32.exe	83
PID 1276 wrote to memory of 2688	1276	rundll32.exe	83

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:576

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bb47f558d7d21602d571a1fbfa82060f202b9d8314595bd3aa8f50f70916d998.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3132
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\bb47f558d7d21602d571a1fbfa82060f202b9d8314595bd3aa8f50f70916d998.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:1276
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\opnlLCsq.dll,a
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    PID:2688

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

C:\Windows\SysWOW64\opnlLCsq.dll

Filesize
25KB

MD5
389e567712c4d6fb2bee03fdb6bce6db

SHA1
69350cd869ecd93a025d419e4800a4e576080c1c

SHA256
bb47f558d7d21602d571a1fbfa82060f202b9d8314595bd3aa8f50f70916d998

SHA512
6b2744fafab07315817aac2bf5ed653a4448aee6c902e10c7a438754690a19387c643ed18e35b06fe7ac875a702e6b318c3c83275eb79a02351f097c4453f70a

Download Submit
C:\Windows\SysWOW64\opnlLCsq.dll

Filesize
25KB

MD5
389e567712c4d6fb2bee03fdb6bce6db

SHA1
69350cd869ecd93a025d419e4800a4e576080c1c

SHA256
bb47f558d7d21602d571a1fbfa82060f202b9d8314595bd3aa8f50f70916d998

SHA512
6b2744fafab07315817aac2bf5ed653a4448aee6c902e10c7a438754690a19387c643ed18e35b06fe7ac875a702e6b318c3c83275eb79a02351f097c4453f70a

Download Submit
C:\Windows\SysWOW64\opnlLCsq.dll

Filesize
25KB

MD5
389e567712c4d6fb2bee03fdb6bce6db

SHA1
69350cd869ecd93a025d419e4800a4e576080c1c

SHA256
bb47f558d7d21602d571a1fbfa82060f202b9d8314595bd3aa8f50f70916d998

SHA512
6b2744fafab07315817aac2bf5ed653a4448aee6c902e10c7a438754690a19387c643ed18e35b06fe7ac875a702e6b318c3c83275eb79a02351f097c4453f70a

Download Submit
C:\Windows\SysWOW64\opnlLCsq.dll

Filesize
25KB

MD5
389e567712c4d6fb2bee03fdb6bce6db

SHA1
69350cd869ecd93a025d419e4800a4e576080c1c

SHA256
bb47f558d7d21602d571a1fbfa82060f202b9d8314595bd3aa8f50f70916d998

SHA512
6b2744fafab07315817aac2bf5ed653a4448aee6c902e10c7a438754690a19387c643ed18e35b06fe7ac875a702e6b318c3c83275eb79a02351f097c4453f70a

Download Submit
memory/1276-135-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/1276-136-0x0000000001300000-0x0000000001312000-memory.dmp

Filesize
72KB

Download
memory/2688-140-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/2688-141-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download