vidar | 2b85d82dd140d794a295b87bb250ebcdfa1aeb1d729f74c37ac0b07083e70daf

General

Target

2b85d82dd140d794a295b87bb250ebcdfa1aeb1d729f74c37ac0b07083e70daf.exe
Size

401KB
MD5

cd681a24c9d79c3af8caa1843296a062
SHA1

c18bfd79658cd691170595dd5b4dd586c21b954c
SHA256

2b85d82dd140d794a295b87bb250ebcdfa1aeb1d729f74c37ac0b07083e70daf
SHA512

2527a1a2acdf8c87e4b459683f6f287bc6fb65ff9eb979c830ec9dfd685380c633787b247b65c3fe3bf57f5c598f48700742f8d8d056c971ed5744e2eb9f5cb5
SSDEEP

12288:CgIVaGe6BEIaaJLq2vru6fv8PF5Nn5e4AkArjUdG8L:NGmLaufTe5rUdG8L

Score

10^/10

vidar 728eadc0b38790aac08b64fd1b8adb1f credential_access discovery spyware stealer

Malware Config

Extracted

Family

vidar

Version

11

Botnet

728eadc0b38790aac08b64fd1b8adb1f

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/636-4-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/636-11-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/636-9-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/636-20-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/636-21-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/636-37-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral2/memory/636-38-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003
Downloads MZ/PE file
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
T1552.001
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 3008 set thread context of 636	3008	2b85d82dd140d794a295b87bb250ebcdfa1aeb1d729f74c37ac0b07083e70daf.exe	90

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	2b85d82dd140d794a295b87bb250ebcdfa1aeb1d729f74c37ac0b07083e70daf.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
636	RegAsm.exe
636	RegAsm.exe
636	RegAsm.exe
636	RegAsm.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3008 wrote to memory of 636	3008	2b85d82dd140d794a295b87bb250ebcdfa1aeb1d729f74c37ac0b07083e70daf.exe	90
PID 3008 wrote to memory of 636	3008	2b85d82dd140d794a295b87bb250ebcdfa1aeb1d729f74c37ac0b07083e70daf.exe	90
PID 3008 wrote to memory of 636	3008	2b85d82dd140d794a295b87bb250ebcdfa1aeb1d729f74c37ac0b07083e70daf.exe	90
PID 3008 wrote to memory of 636	3008	2b85d82dd140d794a295b87bb250ebcdfa1aeb1d729f74c37ac0b07083e70daf.exe	90
PID 3008 wrote to memory of 636	3008	2b85d82dd140d794a295b87bb250ebcdfa1aeb1d729f74c37ac0b07083e70daf.exe	90
PID 3008 wrote to memory of 636	3008	2b85d82dd140d794a295b87bb250ebcdfa1aeb1d729f74c37ac0b07083e70daf.exe	90
PID 3008 wrote to memory of 636	3008	2b85d82dd140d794a295b87bb250ebcdfa1aeb1d729f74c37ac0b07083e70daf.exe	90
PID 3008 wrote to memory of 636	3008	2b85d82dd140d794a295b87bb250ebcdfa1aeb1d729f74c37ac0b07083e70daf.exe	90
PID 3008 wrote to memory of 636	3008	2b85d82dd140d794a295b87bb250ebcdfa1aeb1d729f74c37ac0b07083e70daf.exe	90
PID 3008 wrote to memory of 636	3008	2b85d82dd140d794a295b87bb250ebcdfa1aeb1d729f74c37ac0b07083e70daf.exe	90

C:\Users\Admin\AppData\Local\Temp\2b85d82dd140d794a295b87bb250ebcdfa1aeb1d729f74c37ac0b07083e70daf.exe
"C:\Users\Admin\AppData\Local\Temp\2b85d82dd140d794a295b87bb250ebcdfa1aeb1d729f74c37ac0b07083e70daf.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3008
- 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:636

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4176,i,2727319350781907497,7925939240893079607,262144 --variations-seed-version --mojo-platform-channel-handle=4240 /prefetch:8
1⤵
PID:348

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/636-9-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/636-22-0x00000000222B0000-0x000000002250F000-memory.dmp

Filesize
2.4MB

Download
memory/636-37-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/636-4-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/636-21-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/636-11-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/636-20-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/636-38-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/3008-1-0x00000000003C0000-0x0000000000428000-memory.dmp

Filesize
416KB

Download
memory/3008-6-0x00000000744A0000-0x0000000074C50000-memory.dmp

Filesize
7.7MB

Download
memory/3008-0-0x00000000744AE000-0x00000000744AF000-memory.dmp

Filesize
4KB

Download
memory/3008-2-0x00000000744A0000-0x0000000074C50000-memory.dmp

Filesize
7.7MB

Download
memory/3008-8-0x00000000744A0000-0x0000000074C50000-memory.dmp

Filesize
7.7MB

Download
memory/3008-39-0x00000000744A0000-0x0000000074C50000-memory.dmp

Filesize
7.7MB

Download

Analysis

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