cfef5b9a74db7c0abd81069caee13ee3f57347a8f4d68c6781b0fba072302bde

General

Target

a8b6655d6632057bfb64eb43d9bd3c00N.exe
Size

479KB
MD5

a8b6655d6632057bfb64eb43d9bd3c00
SHA1

f830f5b262a47dcc4a56f7d9117c33d7edc68a5d
SHA256

cfef5b9a74db7c0abd81069caee13ee3f57347a8f4d68c6781b0fba072302bde
SHA512

ebb41e09e9963934fa4f4441e1372fa27a8748852b894c1630f76470245b95b2a16fab4562aa8791e8a928e62be396306c90823191c870ffe86e5c02d208dbe5
SSDEEP

12288:ntKe6Zv23YeC1zApdxHLMLa/NcDoAWmojaygBWL05e9:76Zv2lTdOLyNa4aygBc

Score

8^/10

persistence

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
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{CD88F385-8B9A-11D5-EBA1-F78EEEEEE983}	a8b6655d6632057bfb64eb43d9bd3c00N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{CD88F385-8B9A-11D5-EBA1-F78EEEEEE983}\StubPath = "mshrg32.exe"	a8b6655d6632057bfb64eb43d9bd3c00N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{CD88F385-8B9A-11D5-EBA1-F78EEEEEE983}	spoolsv.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{CD88F385-8B9A-11D5-EBA1-F78EEEEEE983}\StubPath = "mshrg32.exe"	spoolsv.exe

Executes dropped EXE 1 IoCs

pid	Process
2176	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\" %*"	a8b6655d6632057bfb64eb43d9bd3c00N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	spoolsv.exe

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"	a8b6655d6632057bfb64eb43d9bd3c00N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3294248377-1418901787-4083263181-1000\Software\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe"	a8b6655d6632057bfb64eb43d9bd3c00N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe"	spoolsv.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3294248377-1418901787-4083263181-1000\Software\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe"	spoolsv.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\mshrg32.exe	a8b6655d6632057bfb64eb43d9bd3c00N.exe
File opened for modification	C:\Windows\SysWOW64\mshrg32.exe	a8b6655d6632057bfb64eb43d9bd3c00N.exe
File created	C:\Windows\SysWOW64\concp32.exe	a8b6655d6632057bfb64eb43d9bd3c00N.exe
File opened for modification	C:\Windows\SysWOW64\concp32.exe	a8b6655d6632057bfb64eb43d9bd3c00N.exe
File created	C:\Windows\SysWOW64\vcl32.exe	a8b6655d6632057bfb64eb43d9bd3c00N.exe
File opened for modification	C:\Windows\SysWOW64\vcl32.exe	a8b6655d6632057bfb64eb43d9bd3c00N.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\spoolsv.exe	a8b6655d6632057bfb64eb43d9bd3c00N.exe
File created	C:\Windows\spoolsv.exe	a8b6655d6632057bfb64eb43d9bd3c00N.exe

Modifies registry class 12 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CD88F385-8B9A-11D5-EBA1-F78EEEEEE983}\sm = 01b8ec350471bd332433eee476ebe1f3	a8b6655d6632057bfb64eb43d9bd3c00N.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CD88F385-8B9A-11D5-EBA1-F78EEEEEE983}\u0 = 658663d26f8bad325217a06063847056939f558d910ed252e05dd0113550f7fc0f4da82ff73a0681ba604c2d4f23269f	spoolsv.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CD88F385-8B9A-11D5-EBA1-F78EEEEEE983}\u1 = 551d2e0658054ba756fd3798fea5ffca42865cb762a31639dabd7f2cca44e226	spoolsv.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CD88F385-8B9A-11D5-EBA1-F78EEEEEE983}\u2 = a54a6b702f92fdf2acd57599e2ae1608015dff41aa020117fc9bd8e2dcf4340f3fa61eb55d6f28597df90602703809d4	spoolsv.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CD88F385-8B9A-11D5-EBA1-F78EEEEEE983}\v = "165"	spoolsv.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CD88F385-8B9A-11D5-EBA1-F78EEEEEE983}\InprocServer32	a8b6655d6632057bfb64eb43d9bd3c00N.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CD88F385-8B9A-11D5-EBA1-F78EEEEEE983}\ax = 45767f74d43d581a1cb0d3452e643913	a8b6655d6632057bfb64eb43d9bd3c00N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	a8b6655d6632057bfb64eb43d9bd3c00N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CD88F385-8B9A-11D5-EBA1-F78EEEEEE983}	spoolsv.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{CD88F385-8B9A-11D5-EBA1-F78EEEEEE983}\InprocServer32	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\{CD88F385-8B9A-11D5-EBA1-F78EEEEEE983}	a8b6655d6632057bfb64eb43d9bd3c00N.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2392	a8b6655d6632057bfb64eb43d9bd3c00N.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2392 wrote to memory of 2176	2392	a8b6655d6632057bfb64eb43d9bd3c00N.exe	30
PID 2392 wrote to memory of 2176	2392	a8b6655d6632057bfb64eb43d9bd3c00N.exe	30
PID 2392 wrote to memory of 2176	2392	a8b6655d6632057bfb64eb43d9bd3c00N.exe	30
PID 2392 wrote to memory of 2176	2392	a8b6655d6632057bfb64eb43d9bd3c00N.exe	30

C:\Users\Admin\AppData\Local\Temp\a8b6655d6632057bfb64eb43d9bd3c00N.exe
"C:\Users\Admin\AppData\Local\Temp\a8b6655d6632057bfb64eb43d9bd3c00N.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
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2392
- 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
  - Modifies registry class
  PID:2176

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\concp32.exe

Filesize
483KB

MD5
f06626e9e23b6fb9a8f9e843955ce2d4

SHA1
18fe73183e5625c774237112c23863811d511384

SHA256
8c7574da0df3e4d0f295ba3b5ba16a0fdb063bdbdb9735e7fb7daf665b0d5a85

SHA512
d7922b4d6684ea5185933c2329d01835d3f8adc1f035f25d1209743759b6b4bacaef1b32995bce3209573a053bfa6586d49ec8417f2b51fe0df33c9ba5b1b0bf

Download Submit
C:\Windows\spoolsv.exe

Filesize
484KB

MD5
abcb9f25ba1bd9f9883837c52806842c

SHA1
fb6d3b51155ab2f91c78decfb1fc314f018c5068

SHA256
490e94935202d53d3893b3e0a6fb5ac1fc062097468e36dfb2e223398cd2e0eb

SHA512
59956d1c56a5829484177a0b4f425c7cf0b6a15f07489d7a483aecb02cc3a43302384dcc4194b204bacd593a75022d6dd742e6a462a0f619f327b8760f996ff5

Download Submit
memory/2176-15-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2392-0-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2392-14-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads