0bd3b635f422bf0f1d0e5d5329c0ca6aa1c8a89ed5a9e89f599cc0daac41f620

General

Target

64ffbb49b23b1afe0a2c56c6d38e3b10N.exe
Size

918KB
MD5

64ffbb49b23b1afe0a2c56c6d38e3b10
SHA1

46fe8d1306c8bcbba11de5e905527a02852ad88d
SHA256

0bd3b635f422bf0f1d0e5d5329c0ca6aa1c8a89ed5a9e89f599cc0daac41f620
SHA512

e0129b31eb0b5c64b66fa6c8a5fe176778b59adcf99d7148a76ea417c9f76533901e99ede826da3358f360b2304483397d7d08b264b3a0c79ce31e14fde7a8f4
SSDEEP

24576:v6Zv2ivhBVnFys7xP86LkRCwPYfuukvDtiflQMSt:vE2ivhQs7dLkRumsbSt

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
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{B5DBD56B-8B9A-11D5-EBA1-F78EEEEEE983}	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{B5DBD56B-8B9A-11D5-EBA1-F78EEEEEE983}\StubPath = "msgrp32.exe"	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{B5DBD56B-8B9A-11D5-EBA1-F78EEEEEE983}	spoolsv.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{B5DBD56B-8B9A-11D5-EBA1-F78EEEEEE983}\StubPath = "msgrp32.exe"	spoolsv.exe

Executes dropped EXE 1 IoCs

pid	Process
2344	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\" %*"	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	spoolsv.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2404-0-0x0000000000400000-0x0000000000439000-memory.dmp	upx
behavioral1/files/0x000800000001613b-5.dat	upx
behavioral1/memory/2404-10-0x0000000000270000-0x00000000002A9000-memory.dmp	upx
behavioral1/files/0x0008000000015e21-14.dat	upx
behavioral1/memory/2344-16-0x0000000000400000-0x0000000000439000-memory.dmp	upx
behavioral1/memory/2404-15-0x0000000000400000-0x0000000000439000-memory.dmp	upx
behavioral1/memory/2344-17-0x0000000000400000-0x0000000000439000-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"	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe"	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe"	spoolsv.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\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\msgrp32.exe	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe
File created	C:\Windows\SysWOW64\concp32.exe	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe
File opened for modification	C:\Windows\SysWOW64\concp32.exe	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe
File created	C:\Windows\SysWOW64\vcl32.exe	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe
File opened for modification	C:\Windows\SysWOW64\vcl32.exe	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe
File created	C:\Windows\SysWOW64\msgrp32.exe	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\spoolsv.exe	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe
File opened for modification	C:\Windows\spoolsv.exe	64ffbb49b23b1afe0a2c56c6d38e3b10N.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	64ffbb49b23b1afe0a2c56c6d38e3b10N.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\{B5DBD56B-8B9A-11D5-EBA1-F78EEEEEE983}\ax = 38362c038779c1cc60715178723730e0	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{B5DBD56B-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\{B5DBD56B-8B9A-11D5-EBA1-F78EEEEEE983}	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{B5DBD56B-8B9A-11D5-EBA1-F78EEEEEE983}\InprocServer32	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{B5DBD56B-8B9A-11D5-EBA1-F78EEEEEE983}	spoolsv.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{B5DBD56B-8B9A-11D5-EBA1-F78EEEEEE983}\u0 = 658663d26f8bad325217a06063847056939f558d910ed252e05dd0113550f7fc0f4da82ff73a0681ba604c2d4f23269f	spoolsv.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{B5DBD56B-8B9A-11D5-EBA1-F78EEEEEE983}\u1 = 551d2e0658054ba756fd3798fea5ffca42865cb762a31639dabd7f2cca44e226	spoolsv.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{B5DBD56B-8B9A-11D5-EBA1-F78EEEEEE983}\u2 = a54a6b702f92fdf2acd57599e2ae1608015dff41aa020117fc9bd8e2dcf4340f3fa61eb55d6f28597df90602703809d4	spoolsv.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{B5DBD56B-8B9A-11D5-EBA1-F78EEEEEE983}\v = "165"	spoolsv.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{B5DBD56B-8B9A-11D5-EBA1-F78EEEEEE983}\sm = 01b8ec350471bd332433eee476ebe1f3	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2404	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2404 wrote to memory of 2344	2404	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe	30
PID 2404 wrote to memory of 2344	2404	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe	30
PID 2404 wrote to memory of 2344	2404	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe	30
PID 2404 wrote to memory of 2344	2404	64ffbb49b23b1afe0a2c56c6d38e3b10N.exe	30

C:\Users\Admin\AppData\Local\Temp\64ffbb49b23b1afe0a2c56c6d38e3b10N.exe
"C:\Users\Admin\AppData\Local\Temp\64ffbb49b23b1afe0a2c56c6d38e3b10N.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:2404
- 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:2344

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

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Downloads

C:\Windows\SysWOW64\concp32.exe

Filesize
928KB

MD5
51eb66d5db871623207dd0801cd4f04b

SHA1
269516833cc178bb4d3c948647b6cb4c03f42219

SHA256
698d53cfa297da7c8135d4ec2e1391a2d16869cd80879b424aa8f40baf8156bb

SHA512
9024732be720e2218963d1dd6cddd90962601747e28bc28c0e1b76cce1d8c002d707640858a340ee4ef03eab33c563b1e3698cb49714b48e3f4781a81e777f2a

Download Submit
C:\Windows\spoolsv.exe

Filesize
920KB

MD5
76efd15eb17acaa39d2a908d895e4ddb

SHA1
b4aff678262f4e123c6908db73bba54c7ad0117d

SHA256
921851bd7cc150ff766db8937f32dfbc3028f3233f3fb0d4ba013b9c77e09caf

SHA512
e413692b56eaac0aac41170dc8a0ffe0bd4ab429ad8bc6efe18b960d2961bf558aaf05a7f61e6ac277294be06ff6b26f6d558b4b78a6f1091bbe07f96215147f

Download Submit
memory/2344-16-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2344-17-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2404-0-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2404-10-0x0000000000270000-0x00000000002A9000-memory.dmp

Filesize
228KB

Download
memory/2404-15-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads