vidar | 1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92

System Information Discovery

Processes:

1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.execonf.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\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

27 ip-api.com

flow	ioc
27	ip-api.com

AutoIT Executable 3 IoCs

AutoIT scripts compiled to PE executables.

Processes:

resource	yara_rule
behavioral2/memory/3464-152-0x0000000000400000-0x000000000058B000-memory.dmp	autoit_exe
behavioral2/memory/3464-159-0x0000000000400000-0x000000000058B000-memory.dmp	autoit_exe
behavioral2/memory/364-162-0x0000000000400000-0x000000000058B000-memory.dmp	autoit_exe

Drops file in Program Files directory 5 IoCs

Processes:

1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\LetsSee!\YTLoader.exe	1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.exe
File opened for modification	C:\Program Files (x86)\LetsSee!\busshost.exe	1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.exe
File opened for modification	C:\Program Files (x86)\LetsSee!\conf.exe	1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.exe
File opened for modification	C:\Program Files (x86)\LetsSee!\Uninstall.exe	1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.exe
File created	C:\Program Files (x86)\LetsSee!\Uninstall.ini	1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.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

3280 4244 WerFault.exe YTLoader.exe
1692 3464 WerFault.exe conf.exe

pid	pid_target	process	target process
3280	4244	WerFault.exe	YTLoader.exe
1692	3464	WerFault.exe	conf.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

4624 schtasks.exe
4140 schtasks.exe

pid	process
4624	schtasks.exe
4140	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

3860 PING.EXE
Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

busshost.exe

pid process

2004 busshost.exe
2004 busshost.exe
2004 busshost.exe
2004 busshost.exe
2004 busshost.exe
2004 busshost.exe
2004 busshost.exe
2004 busshost.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

YTLoader.exe

description pid process

Token: SeDebugPrivilege 4244 YTLoader.exe

pid	process
3860	PING.EXE

pid	process
2004	busshost.exe
2004	busshost.exe
2004	busshost.exe
2004	busshost.exe
2004	busshost.exe
2004	busshost.exe
2004	busshost.exe
2004	busshost.exe

description	pid	process
Token: SeDebugPrivilege	4244	YTLoader.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.execonf.execmd.exeattachmentphoto.execmd.execmd.exe

description	pid	process	target process
PID 3148 wrote to memory of 2004	3148	1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.exe	busshost.exe
PID 3148 wrote to memory of 2004	3148	1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.exe	busshost.exe
PID 3148 wrote to memory of 2004	3148	1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.exe	busshost.exe
PID 3148 wrote to memory of 4244	3148	1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.exe	YTLoader.exe
PID 3148 wrote to memory of 4244	3148	1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.exe	YTLoader.exe
PID 3148 wrote to memory of 4244	3148	1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.exe	YTLoader.exe
PID 3148 wrote to memory of 3464	3148	1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.exe	conf.exe
PID 3148 wrote to memory of 3464	3148	1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.exe	conf.exe
PID 3148 wrote to memory of 3464	3148	1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.exe	conf.exe
PID 3464 wrote to memory of 364	3464	conf.exe	attachmentphoto.exe
PID 3464 wrote to memory of 364	3464	conf.exe	attachmentphoto.exe
PID 3464 wrote to memory of 364	3464	conf.exe	attachmentphoto.exe
PID 3464 wrote to memory of 4704	3464	conf.exe	cmd.exe
PID 3464 wrote to memory of 4704	3464	conf.exe	cmd.exe
PID 3464 wrote to memory of 4704	3464	conf.exe	cmd.exe
PID 4704 wrote to memory of 3860	4704	cmd.exe	PING.EXE
PID 4704 wrote to memory of 3860	4704	cmd.exe	PING.EXE
PID 4704 wrote to memory of 3860	4704	cmd.exe	PING.EXE
PID 364 wrote to memory of 3824	364	attachmentphoto.exe	cmd.exe
PID 364 wrote to memory of 3824	364	attachmentphoto.exe	cmd.exe
PID 364 wrote to memory of 3824	364	attachmentphoto.exe	cmd.exe
PID 364 wrote to memory of 3032	364	attachmentphoto.exe	cmd.exe
PID 364 wrote to memory of 3032	364	attachmentphoto.exe	cmd.exe
PID 364 wrote to memory of 3032	364	attachmentphoto.exe	cmd.exe
PID 3032 wrote to memory of 4140	3032	cmd.exe	schtasks.exe
PID 3032 wrote to memory of 4140	3032	cmd.exe	schtasks.exe
PID 3032 wrote to memory of 4140	3032	cmd.exe	schtasks.exe
PID 3824 wrote to memory of 4624	3824	cmd.exe	schtasks.exe
PID 3824 wrote to memory of 4624	3824	cmd.exe	schtasks.exe
PID 3824 wrote to memory of 4624	3824	cmd.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.exe
"C:\Users\Admin\AppData\Local\Temp\1b8e1993faa7d88c32a3cfba4af8db01b2ca57c7588b65bfe4bba68c74204c92.exe"
1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:3148

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:2004

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:4244

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4244 -s 1608
3⤵
- Program crash
PID:3280

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:3464

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
- Suspicious use of WriteProcessMemory
PID:364

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⤵
- Suspicious use of WriteProcessMemory
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:4624

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c SchTasks /create /SC HOURLY /TN FlashServis /TR C:\ProgramData\FlashSys\CurlMSI.exe
4⤵
- Suspicious use of WriteProcessMemory
PID:3032

C:\Windows\SysWOW64\schtasks.exe
SchTasks /create /SC HOURLY /TN FlashServis /TR C:\ProgramData\FlashSys\CurlMSI.exe
5⤵
- Creates scheduled task(s)
PID:4140

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:4704

C:\Windows\SysWOW64\PING.EXE
ping -n 2 localhost
4⤵
- Runs ping.exe
PID:3860

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3464 -s 1132
3⤵
- Program crash
PID:1692

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4244 -ip 4244
1⤵
PID:1616

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3464 -ip 3464
1⤵
PID:1124

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