aef3b4c860a5ed910f62851ad4d34965ae71c6c2e8f239f6d692c47688376b53

General

Target

aef3b4c860a5ed910f62851ad4d34965ae71c6c2e8f239f6d692c47688376b53.exe
Size

255KB
MD5

554bc83ad6706fae7ce9eacf171e0c03
SHA1

83226ea02e3480cd79675998a740c052ff34b5f2
SHA256

aef3b4c860a5ed910f62851ad4d34965ae71c6c2e8f239f6d692c47688376b53
SHA512

be00c456326c7e11fc4c17839dc975ed78815121ba36257ad96ad19e094d1f6b437803688844e92b52eb16908e9ccfa16a4d5cbd795aff2708b87ff345f7476f
SSDEEP

6144:7UnITMpSph0lMqqgWoDhujqcQQbxJhVGvkVbOcH4CIMJ:7CQMY07qgWo6VVGvkVLAg

Score

8^/10

persistence upx

Malware Config

Signatures

Modifies Installed Components in the registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

explorer.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Active Setup\Installed Components	explorer.exe

Registers COM server for autorun 1 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Processes:

regsvr32.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Roaming\\Carefree\\plugin.dat"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}\InprocServer32	regsvr32.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Carefree\plugin.dat	upx
C:\Users\Admin\AppData\Roaming\Carefree\plugin.dat	upx
C:\Users\Admin\AppData\Roaming\Carefree\plugin.dat	upx
C:\Users\Admin\AppData\Roaming\Carefree\plugin.dat	upx

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

Processes:

aef3b4c860a5ed910f62851ad4d34965ae71c6c2e8f239f6d692c47688376b53.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	aef3b4c860a5ed910f62851ad4d34965ae71c6c2e8f239f6d692c47688376b53.exe

Loads dropped DLL 3 IoCs

Processes:

regsvr32.exeregsvr32.exeexplorer.exe

pid process

3360 regsvr32.exe
1328 regsvr32.exe
1444 explorer.exe
Enumerates connected drives 3 TTPs 1 IoCs
Attempts to read the root path of hard drives other than the default C: drive.

Query Registry
T1012

Peripheral Device Discovery
T1120

System Information Discovery
T1082

Processes:

explorer.exe

description ioc process

File opened (read-only) \??\D: explorer.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
3360	regsvr32.exe
1328	regsvr32.exe
1444	explorer.exe

description	ioc	process
File opened (read-only)	\??\D:	explorer.exe

Modifies registry class 49 IoCs

Processes:

regsvr32.exeexplorer.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{45615F2E-872A-4F2D-9A08-475EC8605620}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{45615F2E-872A-4F2D-9A08-475EC8605620}\TypeLib\ = "{3692066A-7A10-4CB5-AFF3-9DDE336E97AB}"	regsvr32.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}\Version	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{45615F2E-872A-4F2D-9A08-475EC8605620}\ = "ICarefreeIdentifier"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{3692066A-7A10-4CB5-AFF3-9DDE336E97AB}\1.0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{3692066A-7A10-4CB5-AFF3-9DDE336E97AB}\1.0\ = "CarefreePluginLib"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{3692066A-7A10-4CB5-AFF3-9DDE336E97AB}\1.0\FLAGS	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{3692066A-7A10-4CB5-AFF3-9DDE336E97AB}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Roaming\\Carefree\\plugin.dat"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{45615F2E-872A-4F2D-9A08-475EC8605620}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{45615F2E-872A-4F2D-9A08-475EC8605620}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}\Programmable	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}\TypeLib\ = "{3692066A-7A10-4CB5-AFF3-9DDE336E97AB}"	regsvr32.exe
Key created	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000_Classes\Local Settings	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{3692066A-7A10-4CB5-AFF3-9DDE336E97AB}\1.0\0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{3692066A-7A10-4CB5-AFF3-9DDE336E97AB}\1.0\0\win32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{45615F2E-872A-4F2D-9A08-475EC8605620}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}\Version	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{3692066A-7A10-4CB5-AFF3-9DDE336E97AB}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\	explorer.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}\InprocServer32	regsvr32.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{3692066A-7A10-4CB5-AFF3-9DDE336E97AB}\1.0\FLAGS\ = "0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{45615F2E-872A-4F2D-9A08-475EC8605620}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{45615F2E-872A-4F2D-9A08-475EC8605620}\TypeLib\ = "{3692066A-7A10-4CB5-AFF3-9DDE336E97AB}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{45615F2E-872A-4F2D-9A08-475EC8605620}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}\Version\ = "1.0"	regsvr32.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.Windows.PeopleExperienceHost_cw5n1h2txyewy\ApplicationFrame\Microsoft.Windows.PeopleExperienceHo = 6801000088020000	explorer.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{3692066A-7A10-4CB5-AFF3-9DDE336E97AB}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Roaming\\Carefree"	regsvr32.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}\Programmable	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{45615F2E-872A-4F2D-9A08-475EC8605620}\ = "ICarefreeIdentifier"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{45615F2E-872A-4F2D-9A08-475EC8605620}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Roaming\\Carefree\\plugin.dat"	regsvr32.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}\TypeLib	regsvr32.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{3692066A-7A10-4CB5-AFF3-9DDE336E97AB}\1.0\HELPDIR	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{45615F2E-872A-4F2D-9A08-475EC8605620}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{45615F2E-872A-4F2D-9A08-475EC8605620}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{45615F2E-872A-4F2D-9A08-475EC8605620}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1234066A-7A10-4CB5-AFF3-4783E0978FDE}\ = "DDI4783 Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\Deployment\Package\*\S-1-5-21-2386679933-1492765628-3466841596-1000\{8268F465-0EC3-48E9-B02C-FBBA03B64C1B}	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

aef3b4c860a5ed910f62851ad4d34965ae71c6c2e8f239f6d692c47688376b53.exeexplorer.exe

pid	process
2248	aef3b4c860a5ed910f62851ad4d34965ae71c6c2e8f239f6d692c47688376b53.exe
2248	aef3b4c860a5ed910f62851ad4d34965ae71c6c2e8f239f6d692c47688376b53.exe
2248	aef3b4c860a5ed910f62851ad4d34965ae71c6c2e8f239f6d692c47688376b53.exe
2248	aef3b4c860a5ed910f62851ad4d34965ae71c6c2e8f239f6d692c47688376b53.exe
1444	explorer.exe
1444	explorer.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

Processes:

explorer.exe

description	pid	process
Token: SeShutdownPrivilege	1444	explorer.exe
Token: SeCreatePagefilePrivilege	1444	explorer.exe
Token: SeShutdownPrivilege	1444	explorer.exe
Token: SeCreatePagefilePrivilege	1444	explorer.exe
Token: SeShutdownPrivilege	1444	explorer.exe
Token: SeCreatePagefilePrivilege	1444	explorer.exe
Token: SeShutdownPrivilege	1444	explorer.exe
Token: SeCreatePagefilePrivilege	1444	explorer.exe
Token: SeShutdownPrivilege	1444	explorer.exe
Token: SeCreatePagefilePrivilege	1444	explorer.exe

Suspicious use of FindShellTrayWindow 8 IoCs

Processes:

explorer.exe

pid process

1444 explorer.exe
1444 explorer.exe
1444 explorer.exe
1444 explorer.exe
1444 explorer.exe
1444 explorer.exe
1444 explorer.exe
1444 explorer.exe

Suspicious use of SendNotifyMessage 10 IoCs

Processes:

explorer.exe

pid	process
1444	explorer.exe
1444	explorer.exe
1444	explorer.exe
1444	explorer.exe
1444	explorer.exe
1444	explorer.exe
1444	explorer.exe
1444	explorer.exe
1444	explorer.exe
1444	explorer.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

aef3b4c860a5ed910f62851ad4d34965ae71c6c2e8f239f6d692c47688376b53.exeregsvr32.exe

description	pid	process	target process
PID 2248 wrote to memory of 3360	2248	aef3b4c860a5ed910f62851ad4d34965ae71c6c2e8f239f6d692c47688376b53.exe	regsvr32.exe
PID 2248 wrote to memory of 3360	2248	aef3b4c860a5ed910f62851ad4d34965ae71c6c2e8f239f6d692c47688376b53.exe	regsvr32.exe
PID 2248 wrote to memory of 3360	2248	aef3b4c860a5ed910f62851ad4d34965ae71c6c2e8f239f6d692c47688376b53.exe	regsvr32.exe
PID 3360 wrote to memory of 1328	3360	regsvr32.exe	regsvr32.exe
PID 3360 wrote to memory of 1328	3360	regsvr32.exe	regsvr32.exe

C:\Users\Admin\AppData\Local\Temp\aef3b4c860a5ed910f62851ad4d34965ae71c6c2e8f239f6d692c47688376b53.exe
"C:\Users\Admin\AppData\Local\Temp\aef3b4c860a5ed910f62851ad4d34965ae71c6c2e8f239f6d692c47688376b53.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2248

C:\Windows\SysWOW64\regsvr32.exe
"C:\Windows\System32\regsvr32.exe" /s "C:\Users\Admin\AppData\Roaming\Carefree\plugin.dat"
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3360

C:\Windows\system32\regsvr32.exe
/s "C:\Users\Admin\AppData\Roaming\Carefree\plugin.dat"
3⤵
- Registers COM server for autorun
- Loads dropped DLL
- Modifies registry class
PID:1328

C:\Windows\explorer.exe
explorer.exe
1⤵
- Modifies Installed Components in the registry
- Loads dropped DLL
- Enumerates connected drives
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:1444

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

2

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Carefree\plugin.dat
Filesize
95KB

MD5
04d4d88947a34abe93414c51ee6433c6

SHA1
0b682d8bae0a0435cc969953e044c574ba8c3cd3

SHA256
ebec6786d9e8aedae76ca304edee2a8129ad2bd0378a3cd748c119a50506e4ac

SHA512
9d75d73da5b1bdf49d4924d88a47ae2b602a6881c66a9ca4277bc2a07646c13f2c66e7b114c3b5fbc43156b351f0b43f5d9881e195cfdc5d35f064e9ba78dd31

Download Submit
C:\Users\Admin\AppData\Roaming\Carefree\plugin.dat
Filesize
95KB

MD5
04d4d88947a34abe93414c51ee6433c6

SHA1
0b682d8bae0a0435cc969953e044c574ba8c3cd3

SHA256
ebec6786d9e8aedae76ca304edee2a8129ad2bd0378a3cd748c119a50506e4ac

SHA512
9d75d73da5b1bdf49d4924d88a47ae2b602a6881c66a9ca4277bc2a07646c13f2c66e7b114c3b5fbc43156b351f0b43f5d9881e195cfdc5d35f064e9ba78dd31

Download Submit
C:\Users\Admin\AppData\Roaming\Carefree\plugin.dat
Filesize
95KB

MD5
04d4d88947a34abe93414c51ee6433c6

SHA1
0b682d8bae0a0435cc969953e044c574ba8c3cd3

SHA256
ebec6786d9e8aedae76ca304edee2a8129ad2bd0378a3cd748c119a50506e4ac

SHA512
9d75d73da5b1bdf49d4924d88a47ae2b602a6881c66a9ca4277bc2a07646c13f2c66e7b114c3b5fbc43156b351f0b43f5d9881e195cfdc5d35f064e9ba78dd31

Download Submit
C:\Users\Admin\AppData\Roaming\Carefree\plugin.dat
Filesize
95KB

MD5
04d4d88947a34abe93414c51ee6433c6

SHA1
0b682d8bae0a0435cc969953e044c574ba8c3cd3

SHA256
ebec6786d9e8aedae76ca304edee2a8129ad2bd0378a3cd748c119a50506e4ac

SHA512
9d75d73da5b1bdf49d4924d88a47ae2b602a6881c66a9ca4277bc2a07646c13f2c66e7b114c3b5fbc43156b351f0b43f5d9881e195cfdc5d35f064e9ba78dd31

Download Submit
memory/1328-135-0x0000000000000000-mapping.dmp

Download
memory/3360-132-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads