681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc

General

Target

681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
Size

649KB
MD5

c9fc12973a38dff90898281c18936c36
SHA1

c5bb7142212df10591b57c09fa52d32dc1aaabc7
SHA256

681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc
SHA512

92c4b91a2ed97a69f287a06754e6fc60d1c711a6071b0261160f7d03f060121dd7a26c18e206297b5ab70532c4187242d9a17df4cd0d6b87e077202d48b9a94f
SSDEEP

12288:7tKe6Zv23YLVFhBsC8iFHs+hsuQXIQRUP/g8t5/bIwY0:v6Zv2ivhBVnFvh5Q44UP48ncwl

Score

8^/10

discovery persistence upx

Malware Config

Signatures

Boot or Logon Autostart Execution: Active Setup 2 TTPs 4 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{634C1331-8B9A-11D5-EBA1-F78EEEEEE983}\StubPath = "mshtk32.exe"	spoolsv.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{634C1331-8B9A-11D5-EBA1-F78EEEEEE983}	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{634C1331-8B9A-11D5-EBA1-F78EEEEEE983}\StubPath = "mshtk32.exe"	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{634C1331-8B9A-11D5-EBA1-F78EEEEEE983}	spoolsv.exe

Executes dropped EXE 1 IoCs

pid	Process
2844	spoolsv.exe

Modifies system executable filetype association 2 TTPs 2 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	spoolsv.exe

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2772-0-0x0000000000400000-0x0000000000439000-memory.dmp	upx
behavioral1/files/0x0008000000015db6-5.dat	upx
behavioral1/memory/2772-14-0x0000000000400000-0x0000000000439000-memory.dmp	upx
behavioral1/files/0x0031000000015d98-13.dat	upx
behavioral1/memory/2844-15-0x0000000000400000-0x0000000000439000-memory.dmp	upx
behavioral1/memory/2844-16-0x0000000000400000-0x0000000000439000-memory.dmp	upx

Adds Run key to start application 2 TTPs 4 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\VCL = "vcl32.exe"	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000\Software\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe"	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe"	spoolsv.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000\Software\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe"	spoolsv.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\concp32.exe	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
File created	C:\Windows\SysWOW64\vcl32.exe	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
File opened for modification	C:\Windows\SysWOW64\vcl32.exe	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
File created	C:\Windows\SysWOW64\mshtk32.exe	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
File opened for modification	C:\Windows\SysWOW64\mshtk32.exe	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
File created	C:\Windows\SysWOW64\concp32.exe	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\spoolsv.exe	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
File opened for modification	C:\Windows\spoolsv.exe	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsv.exe

Modifies registry class 12 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{634C1331-8B9A-11D5-EBA1-F78EEEEEE983}\u1 = 551d2e0658054ba756fd3798fea5ffca42865cb762a31639dabd7f2cca44e226	spoolsv.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{634C1331-8B9A-11D5-EBA1-F78EEEEEE983}\u2 = a54a6b702f92fdf2acd57599e2ae1608015dff41aa020117fc9bd8e2dcf4340f3fa61eb55d6f28597df90602703809d4	spoolsv.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{634C1331-8B9A-11D5-EBA1-F78EEEEEE983}\InprocServer32	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{634C1331-8B9A-11D5-EBA1-F78EEEEEE983}\sm = 01b8ec350471bd332433eee476ebe1f3	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{634C1331-8B9A-11D5-EBA1-F78EEEEEE983}\ax = 815a787560e050a1a239919db3f88973	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{634C1331-8B9A-11D5-EBA1-F78EEEEEE983}\InprocServer32	spoolsv.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{634C1331-8B9A-11D5-EBA1-F78EEEEEE983}\u0 = 658663d26f8bad325217a06063847056939f558d910ed252e05dd0113550f7fc0f4da82ff73a0681ba604c2d4f23269f	spoolsv.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{634C1331-8B9A-11D5-EBA1-F78EEEEEE983}\v = "165"	spoolsv.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	spoolsv.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{634C1331-8B9A-11D5-EBA1-F78EEEEEE983}	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{634C1331-8B9A-11D5-EBA1-F78EEEEEE983}	spoolsv.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2772	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2772 wrote to memory of 2844	2772	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe	30
PID 2772 wrote to memory of 2844	2772	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe	30
PID 2772 wrote to memory of 2844	2772	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe	30
PID 2772 wrote to memory of 2844	2772	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe	30

C:\Users\Admin\AppData\Local\Temp\681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
"C:\Users\Admin\AppData\Local\Temp\681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe"
1⤵
- Boot or Logon Autostart Execution: Active Setup
- Modifies system executable filetype association
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2772
- C:\Windows\spoolsv.exe
  C:\Windows\spoolsv.exe
  2⤵
  - Boot or Logon Autostart Execution: Active Setup
  - Executes dropped EXE
  - Modifies system executable filetype association
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:2844

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Active Setup

1

T1547.014

Registry Run Keys / Startup Folder

1

T1547.001

Event Triggered Execution

1

T1546

Change Default File Association

1

T1546.001

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Active Setup

1

T1547.014

Registry Run Keys / Startup Folder

1

T1547.001

Event Triggered Execution

1

T1546

Change Default File Association

1

T1546.001

Defense Evasion

Modify Registry

3

T1112

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Windows\SysWOW64\concp32.exe

Filesize
650KB

MD5
334ad349388f86812c19496cd54b0455

SHA1
fd561c497c11697e190583c91c227acb21255b07

SHA256
7b75c341169b4af274bb46ed0d5a8086cbc982ef5c231763c529224c4fb626ba

SHA512
e07d3cfd6459ea6bc34132df7ddbbc87375a18ad405c87ccf4ec3c36879d4cb1d1ecdf3eaeadbdf8afe33d217368382dd9990b6d2a1e7779b3b3ec48d7aad19d

Download Submit
C:\Windows\spoolsv.exe

Filesize
652KB

MD5
dc649fb2b5dc7d80d564a12fc57a4512

SHA1
ced0de82df4fbc09d349620a360fddcd4341a98c

SHA256
24e77f264abb95c4764061c064432c98a358724b772c4febb8b4d2671a8c49f9

SHA512
2601321ef16acdd48428582af62601ff9915c603554a65602afba71db5fc766c4537dbb6c51051f9a82efe018fdb070d834d995e019442656ddc02923d6ea247

Download Submit
memory/2772-0-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2772-14-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2844-15-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2844-16-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads