ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00

General

Target

ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
Size

112KB
MD5

406e4debe8bd51860964ee861a4df8e1
SHA1

e00f2dbe89be82f55b7c364c3bcadeae32adaec3
SHA256

ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00
SHA512

f9a9f85b93045a80c9a1d3b84419740e9a14c4731879ab5709bd95f247631570a0791dbe78f565ac388dcddee32150fb58793c207fa6d7b99ecc5facc40cd274
SSDEEP

3072:DVi+GaaeMfzwqkOD/bRKBl5+02g3/okd3:Zi+GaaeMfEqke/bo393

Score

8^/10

persistence

Malware Config

Signatures

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Explorer Options3	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	wnksyt.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Explorer Options3	wnksyt.exe

Executes dropped EXE 1 IoCs

pid	Process
968	wnksyt.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Virtual Java rn = "wintsv.exe"	wnksyt.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Virtual Java rn = "wintsv.exe"	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce	wnksyt.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\Run	wnksyt.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	wnksyt.exe

Modifies WinLogon 2 TTPs 6 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Windows start- = "explorer.exe"	wnksyt.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Windows start- = "explorer.exe wintsv.exe"	wnksyt.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Sys Startup = "wintsv.exe"	wnksyt.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Windows start- = "explorer.exe"	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Windows start- = "explorer.exe wintsv.exe"	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Sys Startup = "wintsv.exe"	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe

Drops file in System32 directory 15 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\vandeft.exe	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
File created	C:\Windows\SysWOW64\vandeft.exe	wnksyt.exe
File created	C:\Windows\SysWOW64\wintsv.exe	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
File opened for modification	C:\Windows\SysWOW64\vandeft.exe	wnksyt.exe
File created	C:\Windows\SysWOW64\wintsv.exe	wnksyt.exe
File created	C:\Windows\SysWOW64\atipict.exe	wnksyt.exe
File created	C:\Windows\SysWOW64\wnksyt.exe	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
File opened for modification	C:\Windows\SysWOW64\atipict.exe	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
File created	C:\Windows\SysWOW64\atipict.exe	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
File opened for modification	C:\Windows\SysWOW64\wnksyt.exe	wnksyt.exe
File opened for modification	C:\Windows\SysWOW64\wintsv.exe	wnksyt.exe
File opened for modification	C:\Windows\SysWOW64\wnksyt.exe	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
File opened for modification	C:\Windows\SysWOW64\wintsv.exe	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
File opened for modification	C:\Windows\SysWOW64\vandeft.exe	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
File opened for modification	C:\Windows\SysWOW64\atipict.exe	wnksyt.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4496 wrote to memory of 968	4496	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe	80
PID 4496 wrote to memory of 968	4496	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe	80
PID 4496 wrote to memory of 968	4496	ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe	80

C:\Users\Admin\AppData\Local\Temp\ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe
"C:\Users\Admin\AppData\Local\Temp\ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00.exe"
1⤵
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- Modifies WinLogon
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:4496
- C:\Windows\SysWOW64\wnksyt.exe
  "C:\Windows\System32\wnksyt.exe" a
  2⤵
  - Adds policy Run key to start application
  - Executes dropped EXE
  - Adds Run key to start application
  - Modifies WinLogon
  - Drops file in System32 directory
  PID:968

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

Winlogon Helper DLL

Privilege Escalation

Defense Evasion

Modify Registry

3

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\atipict.exe

Filesize
112KB

MD5
406e4debe8bd51860964ee861a4df8e1

SHA1
e00f2dbe89be82f55b7c364c3bcadeae32adaec3

SHA256
ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00

SHA512
f9a9f85b93045a80c9a1d3b84419740e9a14c4731879ab5709bd95f247631570a0791dbe78f565ac388dcddee32150fb58793c207fa6d7b99ecc5facc40cd274

Download Submit
C:\Windows\SysWOW64\vandeft.exe

Filesize
112KB

MD5
406e4debe8bd51860964ee861a4df8e1

SHA1
e00f2dbe89be82f55b7c364c3bcadeae32adaec3

SHA256
ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00

SHA512
f9a9f85b93045a80c9a1d3b84419740e9a14c4731879ab5709bd95f247631570a0791dbe78f565ac388dcddee32150fb58793c207fa6d7b99ecc5facc40cd274

Download Submit
C:\Windows\SysWOW64\wintsv.exe

Filesize
112KB

MD5
406e4debe8bd51860964ee861a4df8e1

SHA1
e00f2dbe89be82f55b7c364c3bcadeae32adaec3

SHA256
ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00

SHA512
f9a9f85b93045a80c9a1d3b84419740e9a14c4731879ab5709bd95f247631570a0791dbe78f565ac388dcddee32150fb58793c207fa6d7b99ecc5facc40cd274

Download Submit
C:\Windows\SysWOW64\wnksyt.exe

Filesize
112KB

MD5
406e4debe8bd51860964ee861a4df8e1

SHA1
e00f2dbe89be82f55b7c364c3bcadeae32adaec3

SHA256
ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00

SHA512
f9a9f85b93045a80c9a1d3b84419740e9a14c4731879ab5709bd95f247631570a0791dbe78f565ac388dcddee32150fb58793c207fa6d7b99ecc5facc40cd274

Download Submit
C:\Windows\SysWOW64\wnksyt.exe

Filesize
112KB

MD5
406e4debe8bd51860964ee861a4df8e1

SHA1
e00f2dbe89be82f55b7c364c3bcadeae32adaec3

SHA256
ca83d3794271815b339ff374d04748ca77959dd1ac2b28b29695b375878f8f00

SHA512
f9a9f85b93045a80c9a1d3b84419740e9a14c4731879ab5709bd95f247631570a0791dbe78f565ac388dcddee32150fb58793c207fa6d7b99ecc5facc40cd274

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads