vidar | bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96

General

Target

file.exe
Size

401KB
MD5

5f1ea69f876e6c0b3f52c49cb56a5933
SHA1

25efa25249943f752eb980d33a9945f126310fa9
SHA256

bf41950c2b87050f69bbcb6cb810e990d9a1f60a7109e8a3ba4668f2e397db96
SHA512

b6636579c7ef7b18e65bbf331527e3069c3b3c403fc21744f1692f1f882dc2e67ebc4c003ca857b2fa460fcc9e078f6c4dbbb1205d232f198e8046c7036dd2b3
SSDEEP

12288:DuSEc/XKSAotoNQQGqlWAmyF0x3EGXY0kD:DIcPKTotHQ5Wzp5SD

Score

10^/10

vidar b438a316528fda660b5e4e28911b77a1 credential_access discovery spyware stealer

Malware Config

Extracted

Family

vidar

Version

11

Botnet

b438a316528fda660b5e4e28911b77a1

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 10 IoCs

stealer

resource	yara_rule
behavioral1/memory/2428-8-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral1/memory/2428-14-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral1/memory/2428-10-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral1/memory/2428-9-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral1/memory/2428-18-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral1/memory/2428-19-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral1/memory/2428-160-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral1/memory/2428-179-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral1/memory/2428-209-0x0000000000400000-0x0000000000675000-memory.dmp	family_vidar_v7
behavioral1/memory/2428-228-0x0000000000400000-0x0000000000675000-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 2204 set thread context of 2428	2204	file.exe	32

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

Modifies system certificate store 2 TTPs 3 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25	RegAsm.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25\Blob = 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	RegAsm.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25\Blob = 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	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2428	RegAsm.exe
2428	RegAsm.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2204 wrote to memory of 2428	2204	file.exe	32
PID 2204 wrote to memory of 2428	2204	file.exe	32
PID 2204 wrote to memory of 2428	2204	file.exe	32
PID 2204 wrote to memory of 2428	2204	file.exe	32
PID 2204 wrote to memory of 2428	2204	file.exe	32
PID 2204 wrote to memory of 2428	2204	file.exe	32
PID 2204 wrote to memory of 2428	2204	file.exe	32
PID 2204 wrote to memory of 2428	2204	file.exe	32
PID 2204 wrote to memory of 2428	2204	file.exe	32
PID 2204 wrote to memory of 2428	2204	file.exe	32
PID 2204 wrote to memory of 2428	2204	file.exe	32
PID 2204 wrote to memory of 2428	2204	file.exe	32
PID 2204 wrote to memory of 2428	2204	file.exe	32
PID 2204 wrote to memory of 2428	2204	file.exe	32

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:2204
- 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
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  PID:2428

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

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

C:\Users\Admin\AppData\Local\Temp\CabD06B.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarD09D.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
memory/2204-1-0x0000000000920000-0x0000000000988000-memory.dmp

Filesize
416KB

Download
memory/2204-2-0x00000000747C0000-0x0000000074EAE000-memory.dmp

Filesize
6.9MB

Download
memory/2204-4-0x00000000747C0000-0x0000000074EAE000-memory.dmp

Filesize
6.9MB

Download
memory/2204-0-0x00000000747CE000-0x00000000747CF000-memory.dmp

Filesize
4KB

Download
memory/2204-15-0x00000000747C0000-0x0000000074EAE000-memory.dmp

Filesize
6.9MB

Download
memory/2428-8-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2428-19-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2428-10-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2428-9-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2428-7-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2428-6-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2428-18-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2428-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2428-14-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2428-5-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2428-160-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2428-179-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2428-199-0x0000000020630000-0x000000002088F000-memory.dmp

Filesize
2.4MB

Download
memory/2428-209-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download
memory/2428-228-0x0000000000400000-0x0000000000675000-memory.dmp

Filesize
2.5MB

Download

Analysis

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