c6385beed79c7a846f91dfb649e8338f24768b3305dc9192681cc616ab27161b

General

Target

c6385beed79c7a846f91dfb649e8338f24768b3305dc9192681cc616ab27161b.exe
Size

842KB
MD5

0e5d755b9d631710715cc879ef72c0a0
SHA1

873921f8244efcbc24051a9fabda607a97c3b8a9
SHA256

c6385beed79c7a846f91dfb649e8338f24768b3305dc9192681cc616ab27161b
SHA512

f1377fc14d698c7b28fa6d5b4e7e923d96918892f44473e2836d2ed04dd3d0c1504ea2f2b9693807d342cb53a26a0b7707281ce347ad64a62e7bc574e6dbeb6b
SSDEEP

12288:C5h3PhAT+T3YJZ7djjyoGt87O7aXp5endibj:C3PGa3YJv36jaXp5

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2472	Tcv.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	c6385beed79c7a846f91dfb649e8338f24768b3305dc9192681cc616ab27161b.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Lcv_sys.exe	c6385beed79c7a846f91dfb649e8338f24768b3305dc9192681cc616ab27161b.exe
File created	C:\Windows\SysWOW64\Lcv_sys.exe	c6385beed79c7a846f91dfb649e8338f24768b3305dc9192681cc616ab27161b.exe
File opened for modification	C:\Windows\SysWOW64\Discv.dll	c6385beed79c7a846f91dfb649e8338f24768b3305dc9192681cc616ab27161b.exe
File created	C:\Windows\SysWOW64\Discv.dll	c6385beed79c7a846f91dfb649e8338f24768b3305dc9192681cc616ab27161b.exe

Drops file in Program Files directory 13 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\7-Zip\7zFM.exe	Tcv.exe
File opened for modification	\??\c:\Program Files\7-Zip\7zG.exe	Tcv.exe
File opened for modification	\??\c:\Program Files\7-Zip\Uninstall.exe	Tcv.exe
File opened for modification	\??\c:\Program Files\Common Files\microsoft shared\ClickToRun\AppVShNotify.exe	Tcv.exe
File opened for modification	\??\c:\Program Files\Common Files\microsoft shared\ClickToRun\InspectorOfficeGadget.exe	Tcv.exe
File opened for modification	\??\c:\Program Files\Common Files\microsoft shared\ClickToRun\OfficeClickToRun.exe	Tcv.exe
File opened for modification	\??\c:\Program Files\Common Files\microsoft shared\ink\mip.exe	Tcv.exe
File opened for modification	\??\c:\Program Files\7-Zip\7z.exe	Tcv.exe
File opened for modification	\??\c:\Program Files\Common Files\microsoft shared\ClickToRun\appvcleaner.exe	Tcv.exe
File opened for modification	\??\c:\Program Files\Common Files\microsoft shared\ClickToRun\IntegratedOffice.exe	Tcv.exe
File opened for modification	\??\c:\Program Files\Common Files\microsoft shared\ClickToRun\MavInject32.exe	Tcv.exe
File opened for modification	\??\c:\Program Files\Common Files\microsoft shared\ClickToRun\OfficeC2RClient.exe	Tcv.exe
File opened for modification	\??\c:\Program Files\Common Files\microsoft shared\ink\InputPersonalization.exe	Tcv.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\winstart.bat	c6385beed79c7a846f91dfb649e8338f24768b3305dc9192681cc616ab27161b.exe
File opened for modification	C:\Windows\winstart.bat	c6385beed79c7a846f91dfb649e8338f24768b3305dc9192681cc616ab27161b.exe
File opened for modification	C:\Windows\winstart.bat	Tcv.exe
File created	C:\Windows\winstart.bat	Tcv.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	c6385beed79c7a846f91dfb649e8338f24768b3305dc9192681cc616ab27161b.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4648 wrote to memory of 2472	4648	c6385beed79c7a846f91dfb649e8338f24768b3305dc9192681cc616ab27161b.exe	80
PID 4648 wrote to memory of 2472	4648	c6385beed79c7a846f91dfb649e8338f24768b3305dc9192681cc616ab27161b.exe	80
PID 4648 wrote to memory of 2472	4648	c6385beed79c7a846f91dfb649e8338f24768b3305dc9192681cc616ab27161b.exe	80

C:\Users\Admin\AppData\Local\Temp\c6385beed79c7a846f91dfb649e8338f24768b3305dc9192681cc616ab27161b.exe
"C:\Users\Admin\AppData\Local\Temp\c6385beed79c7a846f91dfb649e8338f24768b3305dc9192681cc616ab27161b.exe"
1⤵
- Checks computer location settings
- Drops file in System32 directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4648
- C:\Windows\TEMP\Tcv.exe
  "C:\Windows\TEMP\Tcv.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - Drops file in Windows directory
  PID:2472

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\TEMP\Tcv.exe

Filesize
842KB

MD5
a340eff64a124ac9bfa71c61b72cc86e

SHA1
19c49fa817ca6d26bd86cfa43313fd038d5b86eb

SHA256
7c9fe3f674b4c67dddac1f2ce1cc878db5d22ba5c95457e7dd673504427a2599

SHA512
8eaf2df97c11f4d7ac27943866fab48a96a55d56fb5b2fdf3aa867e95eb7de62633bb1f3d49e1f2748cae3a52fb57ba98c4037c4763adc2485ff54da7377dfb3

Download Submit
C:\Windows\Temp\Tcv.exe

Filesize
842KB

MD5
a340eff64a124ac9bfa71c61b72cc86e

SHA1
19c49fa817ca6d26bd86cfa43313fd038d5b86eb

SHA256
7c9fe3f674b4c67dddac1f2ce1cc878db5d22ba5c95457e7dd673504427a2599

SHA512
8eaf2df97c11f4d7ac27943866fab48a96a55d56fb5b2fdf3aa867e95eb7de62633bb1f3d49e1f2748cae3a52fb57ba98c4037c4763adc2485ff54da7377dfb3

Download Submit
C:\Windows\winstart.bat

Filesize
422B

MD5
09803d071318974890e67f0811e6c81e

SHA1
31cdea8e9f9c5d8f374fcb99f483b4a6f4acbe9f

SHA256
b272167a1dffc3c73e53edc84d2cd59145c51c374b5b67bd5e2725a179da93ec

SHA512
01f8a2cb92d668c2efd1e3d80faa13fc2361945e9ed8db54dab457050afbdb5433b0a2053834cf08478d37916cddefa8174fc4717cc6cf7350d50789406bf5c4

Download Submit

Analysis

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