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 2 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\{F59C3796-8B9A-11D5-EBA1-F78EEEEEE983}\StubPath = "msukk32.exe"	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F59C3796-8B9A-11D5-EBA1-F78EEEEEE983}	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe

Modifies system executable filetype association 2 TTPs 1 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

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3800-0-0x0000000000400000-0x0000000000439000-memory.dmp	upx
behavioral2/files/0x00080000000233f9-5.dat	upx
behavioral2/memory/3800-7-0x0000000000400000-0x0000000000439000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 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-1-5-21-2412658365-3084825385-3340777666-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe"	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.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\msukk32.exe	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
File opened for modification	C:\Windows\SysWOW64\msukk32.exe	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
File created	C:\Windows\SysWOW64\concp32.exe	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3520	3800	WerFault.exe	82

System Location Discovery: System Language Discovery 1 TTPs 1 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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F59C3796-8B9A-11D5-EBA1-F78EEEEEE983}	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F59C3796-8B9A-11D5-EBA1-F78EEEEEE983}\InprocServer32	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F59C3796-8B9A-11D5-EBA1-F78EEEEEE983}\sm = ebb5525fa3bcf9422c8ff945977d6af9	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F59C3796-8B9A-11D5-EBA1-F78EEEEEE983}\ax = a2ce0a1e92f4536ff788f57e04a53ea9	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3800	681792db131db45607a7fe7b80d0b16ff3ab46df85f5ea8bd189655e771877dc.exe

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
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
PID:3800
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3800 -s 728
  2⤵
  - Program crash
  PID:3520

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 372 -p 3800 -ip 3800
1⤵
PID:3300

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
655KB

MD5
7b2863ff8541676c0176e1fa6ffcdcfe

SHA1
0d0ba34fe0fc58aa4efd0c44a5c5e352cf9fffda

SHA256
26085e8304de930117806b9e3a29eff8d7fdb9276fcc8ddfef275ab8b7255e36

SHA512
f275b1d3f61c8ea4d2e67da87be0058a30d95e66002cb79139937efe3a8232114de83e3741f3896220c7319ef86fef32757458c650496d4a1e6f138d3c6a4094

Download Submit
memory/3800-0-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/3800-7-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads