vidar | ada1caff222d32f19882f0c10cca32ed19269dd5e0c9549ed30f5a7d2c3ef4df

General

Target

file.exe
Size

404KB
MD5

427b61a21b5e6cce5a3427815efb41a4
SHA1

84a6a1305df5c2464597d1bbc88d45c01cd6799a
SHA256

ada1caff222d32f19882f0c10cca32ed19269dd5e0c9549ed30f5a7d2c3ef4df
SHA512

564b8a4a8a2c950486e236267e7d94944d0e6541eebb978428abd0659eff279bc41b61d072652837461e636f626ddd304c7f565f2ce89c7d65c5aee5245b89a7
SSDEEP

12288:tfetpA5JnbIJ9pq4LJrrFdSN5Gqiri10lEO:tmtC5J8Bd5hQ4iKlt

Score

10^/10

vidar bfbc20dd73d4c0ce3af06c489f797a4e discovery spyware stealer

Malware Config

Extracted

Family

vidar

Version

11

Botnet

bfbc20dd73d4c0ce3af06c489f797a4e

C2

https://t.me/jamsemlg

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/232-3-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/232-6-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/232-8-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/232-18-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/232-19-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/232-36-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/232-37-0x0000000000400000-0x0000000000676000-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 1176 set thread context of 232	1176	file.exe	86

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
232	RegAsm.exe
232	RegAsm.exe
232	RegAsm.exe
232	RegAsm.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1176 wrote to memory of 212	1176	file.exe	85
PID 1176 wrote to memory of 212	1176	file.exe	85
PID 1176 wrote to memory of 212	1176	file.exe	85
PID 1176 wrote to memory of 232	1176	file.exe	86
PID 1176 wrote to memory of 232	1176	file.exe	86
PID 1176 wrote to memory of 232	1176	file.exe	86
PID 1176 wrote to memory of 232	1176	file.exe	86
PID 1176 wrote to memory of 232	1176	file.exe	86
PID 1176 wrote to memory of 232	1176	file.exe	86
PID 1176 wrote to memory of 232	1176	file.exe	86
PID 1176 wrote to memory of 232	1176	file.exe	86
PID 1176 wrote to memory of 232	1176	file.exe	86
PID 1176 wrote to memory of 232	1176	file.exe	86

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:1176
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:212
- 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:232

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/232-3-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/232-6-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/232-8-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/232-18-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/232-19-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/232-21-0x0000000022710000-0x000000002296F000-memory.dmp

Filesize
2.4MB

Download
memory/232-36-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/232-37-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/1176-0-0x0000000074DBE000-0x0000000074DBF000-memory.dmp

Filesize
4KB

Download
memory/1176-1-0x0000000000F50000-0x0000000000FBA000-memory.dmp

Filesize
424KB

Download
memory/1176-11-0x0000000074DB0000-0x0000000075560000-memory.dmp

Filesize
7.7MB

Download
memory/1176-38-0x0000000074DB0000-0x0000000075560000-memory.dmp

Filesize
7.7MB

Download

Analysis

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