vidar | 1174cade1bd7b389c084b340898d4afd84e1145d9294d8a550f3a532f09cda7c

General

Target

file.exe
Size

403KB
MD5

8b0b12811b60a92a72b636a46fadb0ba
SHA1

0ab6b31b69b7964de2e9639169d036c68f9efd76
SHA256

1174cade1bd7b389c084b340898d4afd84e1145d9294d8a550f3a532f09cda7c
SHA512

abf908cb7505acd792aa1d9a346ec1b635f5c078ad2104b5d5a0678cc54e216a843fbacba25ebff6a7baed6a6463ee8fc433ff1c71178775366b7f4aade1227a
SSDEEP

12288:dHROWCWIpXQ6dvhXe+iGaXImXN18/7LV+z+0EO:ludvbwX4/7LV/0t

Score

10^/10

vidar 9bf5e431869643a2ac397d2dc0d687fb discovery spyware stealer

Malware Config

Extracted

Family

vidar

Version

11

Botnet

9bf5e431869643a2ac397d2dc0d687fb

C2

https://steamcommunity.com/profiles/76561199780418869

https://t.me/ae5ed

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:130.0) Gecko/20100101 Firefox/130.0

Signatures

Detect Vidar Stealer 7 IoCs

stealer

resource	yara_rule
behavioral2/memory/4656-3-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/4656-8-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/4656-6-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/4656-18-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/4656-19-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/4656-36-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/4656-37-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Downloads MZ/PE file
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003
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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2972 set thread context of 4656	2972	file.exe	84

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	file.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	RegAsm.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4656	RegAsm.exe
4656	RegAsm.exe
4656	RegAsm.exe
4656	RegAsm.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2972 wrote to memory of 4052	2972	file.exe	83
PID 2972 wrote to memory of 4052	2972	file.exe	83
PID 2972 wrote to memory of 4052	2972	file.exe	83
PID 2972 wrote to memory of 4656	2972	file.exe	84
PID 2972 wrote to memory of 4656	2972	file.exe	84
PID 2972 wrote to memory of 4656	2972	file.exe	84
PID 2972 wrote to memory of 4656	2972	file.exe	84
PID 2972 wrote to memory of 4656	2972	file.exe	84
PID 2972 wrote to memory of 4656	2972	file.exe	84
PID 2972 wrote to memory of 4656	2972	file.exe	84
PID 2972 wrote to memory of 4656	2972	file.exe	84
PID 2972 wrote to memory of 4656	2972	file.exe	84
PID 2972 wrote to memory of 4656	2972	file.exe	84

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2972
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:4052
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4656

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Browser Information Discovery

Query Registry

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2972-0-0x0000000074F3E000-0x0000000074F3F000-memory.dmp

Filesize
4KB

Download
memory/2972-1-0x0000000000D10000-0x0000000000D78000-memory.dmp

Filesize
416KB

Download
memory/2972-11-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/2972-20-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/4656-3-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/4656-8-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/4656-6-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/4656-18-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/4656-19-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/4656-21-0x00000000226E0000-0x000000002293F000-memory.dmp

Filesize
2.4MB

Download
memory/4656-36-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/4656-37-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download

Analysis

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