vidar | 2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f

System Information Discovery

Processes:

2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.execonf.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	conf.exe

Reads local data of messenger clients 2 TTPs
Infostealers often target stored data of messaging applications, which can include saved credentials and account information.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses 2FA software files, possible credential harvesting 2 TTPs
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

24 ip-api.com

flow	ioc
24	ip-api.com

AutoIT Executable 3 IoCs

AutoIT scripts compiled to PE executables.

Processes:

resource	yara_rule
behavioral2/memory/2508-156-0x0000000000400000-0x000000000535D000-memory.dmp	autoit_exe
behavioral2/memory/3924-166-0x0000000000400000-0x000000000535D000-memory.dmp	autoit_exe
behavioral2/memory/3924-167-0x0000000000400000-0x000000000535D000-memory.dmp	autoit_exe

Drops file in Program Files directory 5 IoCs

Processes:

2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\LetsSee!\YTLoader.exe	2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe
File opened for modification	C:\Program Files (x86)\LetsSee!\busshost.exe	2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe
File opened for modification	C:\Program Files (x86)\LetsSee!\conf.exe	2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe
File opened for modification	C:\Program Files (x86)\LetsSee!\Uninstall.exe	2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe
File created	C:\Program Files (x86)\LetsSee!\Uninstall.ini	2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe

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

System Information Discovery
T1082
Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

1964 2508 WerFault.exe conf.exe
1268 1300 WerFault.exe YTLoader.exe

pid	pid_target	process	target process
1964	2508	WerFault.exe	conf.exe
1268	1300	WerFault.exe	YTLoader.exe

Checks processor information in registry 2 TTPs 4 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

Processes:

YTLoader.exebusshost.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	YTLoader.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	YTLoader.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	busshost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	busshost.exe

Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exe

pid process

380 schtasks.exe
4004 schtasks.exe

pid	process
380	schtasks.exe
4004	schtasks.exe

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

System Information Discovery

Processes:

YTLoader.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	YTLoader.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	YTLoader.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName	YTLoader.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

4596 PING.EXE
Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

busshost.exe

pid process

4344 busshost.exe
4344 busshost.exe
4344 busshost.exe
4344 busshost.exe
4344 busshost.exe
4344 busshost.exe
4344 busshost.exe
4344 busshost.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

YTLoader.exe

description pid process

Token: SeDebugPrivilege 1300 YTLoader.exe

pid	process
4596	PING.EXE

pid	process
4344	busshost.exe
4344	busshost.exe
4344	busshost.exe
4344	busshost.exe
4344	busshost.exe
4344	busshost.exe
4344	busshost.exe
4344	busshost.exe

description	pid	process
Token: SeDebugPrivilege	1300	YTLoader.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.execonf.execmd.exe

description	pid	process	target process
PID 1344 wrote to memory of 4344	1344	2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe	busshost.exe
PID 1344 wrote to memory of 4344	1344	2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe	busshost.exe
PID 1344 wrote to memory of 4344	1344	2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe	busshost.exe
PID 1344 wrote to memory of 1300	1344	2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe	YTLoader.exe
PID 1344 wrote to memory of 1300	1344	2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe	YTLoader.exe
PID 1344 wrote to memory of 1300	1344	2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe	YTLoader.exe
PID 1344 wrote to memory of 2508	1344	2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe	conf.exe
PID 1344 wrote to memory of 2508	1344	2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe	conf.exe
PID 1344 wrote to memory of 2508	1344	2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe	conf.exe
PID 2508 wrote to memory of 3924	2508	conf.exe	attachmentphoto.exe
PID 2508 wrote to memory of 3924	2508	conf.exe	attachmentphoto.exe
PID 2508 wrote to memory of 3924	2508	conf.exe	attachmentphoto.exe
PID 2508 wrote to memory of 4008	2508	conf.exe	cmd.exe
PID 2508 wrote to memory of 4008	2508	conf.exe	cmd.exe
PID 2508 wrote to memory of 4008	2508	conf.exe	cmd.exe
PID 4008 wrote to memory of 4596	4008	cmd.exe	PING.EXE
PID 4008 wrote to memory of 4596	4008	cmd.exe	PING.EXE
PID 4008 wrote to memory of 4596	4008	cmd.exe	PING.EXE

C:\Users\Admin\AppData\Local\Temp\2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe
"C:\Users\Admin\AppData\Local\Temp\2716e1c86f3a9c1a4f84eadba40a8b6e80c7ee1fd1a39729c7351b7f85232b7f.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1344

C:\Program Files (x86)\LetsSee!\busshost.exe
"C:\Program Files (x86)\LetsSee!\busshost.exe"
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4344

C:\Program Files (x86)\LetsSee!\YTLoader.exe
"C:\Program Files (x86)\LetsSee!\YTLoader.exe"
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:1300

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1300 -s 1588
3⤵
- Program crash
PID:1268

C:\Program Files (x86)\LetsSee!\conf.exe
"C:\Program Files (x86)\LetsSee!\conf.exe"
2⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2508

C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\attachmentphoto.exe
C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\attachmentphoto.exe
3⤵
- Executes dropped EXE
PID:3924

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c SchTasks /create /SC HOURLY /TN FlashServis /TR C:\ProgramData\FlashSys\CurlMSI.exe
4⤵
PID:3672

C:\Windows\SysWOW64\schtasks.exe
SchTasks /create /SC HOURLY /TN FlashServis /TR C:\ProgramData\FlashSys\CurlMSI.exe
5⤵
- Creates scheduled task(s)
PID:380

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c SchTasks /create /SC MINUTE /TN 7ZipUnis /TR C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\volumfix.exe
4⤵
PID:3824

C:\Windows\SysWOW64\schtasks.exe
SchTasks /create /SC MINUTE /TN 7ZipUnis /TR C:\Users\Admin\AppData\Roaming\Microsoft\SystemCertificates\My\CTLs\7ZipArchiver\volumfix.exe
5⤵
- Creates scheduled task(s)
PID:4004

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k ping -n 2 localhost < nul & del /F /Q "C:\Program Files (x86)\LetsSee!\conf.exe"
3⤵
- Suspicious use of WriteProcessMemory
PID:4008

C:\Windows\SysWOW64\PING.EXE
ping -n 2 localhost
4⤵
- Runs ping.exe
PID:4596

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2508 -s 1004
3⤵
- Program crash
PID:1964

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 2508 -ip 2508
1⤵
PID:1940

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 1300 -ip 1300
1⤵
PID:4624

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

System Information Discovery

Remote System Discovery

T1018

Lateral Movement

Collection

Data from Local System