vidar | fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93

General

Target

fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.exe
Size

403KB
MD5

477f0641023c28b462ea3d1b0a62151d
SHA1

d1e3eaa36f07796995c4ad192754bfebc20778dc
SHA256

fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93
SHA512

08b6a37518fcc0f018375b33db4911da6f3111c9b3d9f621c15e584dc4823ec7ba613d01fb37793c4a8bea950c3b523a8ef092a73451c5e1cda35352e37c6dea
SSDEEP

12288:Dlu1SX7Sor999NBAlAdwefOixMORgj8cn7dy7zLsEO:o1SLzr1AlqdfrbuIOBygt

Score

10^/10

vidar 58cd250b15e666e5f72fcf5caa6cb131 discovery spyware stealer

Malware Config

Extracted

Family

vidar

Version

11

Botnet

58cd250b15e666e5f72fcf5caa6cb131

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/772-8-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/772-6-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/772-3-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/772-20-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/772-21-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/772-37-0x0000000000400000-0x0000000000676000-memory.dmp	family_vidar_v7
behavioral2/memory/772-38-0x0000000000400000-0x0000000000676000-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 3748 set thread context of 772	3748	fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.exe	77

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	fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.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 24 IoCs

pid	Process
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe
772	RegAsm.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 3748 wrote to memory of 2400	3748	fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.exe	76
PID 3748 wrote to memory of 2400	3748	fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.exe	76
PID 3748 wrote to memory of 2400	3748	fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.exe	76
PID 3748 wrote to memory of 772	3748	fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.exe	77
PID 3748 wrote to memory of 772	3748	fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.exe	77
PID 3748 wrote to memory of 772	3748	fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.exe	77
PID 3748 wrote to memory of 772	3748	fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.exe	77
PID 3748 wrote to memory of 772	3748	fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.exe	77
PID 3748 wrote to memory of 772	3748	fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.exe	77
PID 3748 wrote to memory of 772	3748	fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.exe	77
PID 3748 wrote to memory of 772	3748	fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.exe	77
PID 3748 wrote to memory of 772	3748	fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.exe	77
PID 3748 wrote to memory of 772	3748	fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.exe	77

C:\Users\Admin\AppData\Local\Temp\fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.exe
"C:\Users\Admin\AppData\Local\Temp\fb371a0bf9bd2437bfeb1e15335f35f60f071662c0c6a1d3b9abd1359ad85c93.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3748
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:2400
- 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:772

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/772-8-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/772-6-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/772-3-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/772-20-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/772-21-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/772-23-0x00000000223D0000-0x000000002262F000-memory.dmp

Filesize
2.4MB

Download
memory/772-37-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/772-38-0x0000000000400000-0x0000000000676000-memory.dmp

Filesize
2.5MB

Download
memory/3748-0-0x000000007302E000-0x000000007302F000-memory.dmp

Filesize
4KB

Download
memory/3748-1-0x00000000004F0000-0x0000000000558000-memory.dmp

Filesize
416KB

Download
memory/3748-11-0x0000000073020000-0x000000007370E000-memory.dmp

Filesize
6.9MB

Download
memory/3748-39-0x0000000073020000-0x000000007370E000-memory.dmp

Filesize
6.9MB

Download

Analysis

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