vidar | e4b94bbbc90229ebdfc4a28028890d73fc085f460e9dac460bb4192417b4d7d3

Resubmissions

20/01/2025, 22:03

250120-1ye4js1pgl 10

20/01/2025, 21:44

250120-1lsh4s1kbj 10

Analysis

max time kernel
65s
max time network
71s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20/01/2025, 22:03

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General

Target

index.ps1
Size

34B
MD5

d83c49ed6318ba5e402c311cd7e55c3f
SHA1

50520860840fab9b9aebf90b3e16f2466613d5d0
SHA256

e4b94bbbc90229ebdfc4a28028890d73fc085f460e9dac460bb4192417b4d7d3
SHA512

eb747e268fde9971416c156267a17a698e0a10209b48a75b2b77987fadc496b82e18e8441ccaac854feb37d828868e70469e45c4549db8587e01d171fc444e10

Score

10^/10

vidar fc0stn discovery execution stealer

Malware Config

Extracted

Family

vidar

Botnet

fc0stn

https://t.me/w0ctzn

https://steamcommunity.com/profiles/76561199817305251

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:131.0) Gecko/20100101 Firefox/131.0

Signatures

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Vidar family
vidar

Blocklisted process makes network request 2 IoCs

flow	pid	Process
11	3700	powershell.exe
17	3700	powershell.exe

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
2516	updater.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2516 set thread context of 1704	2516	updater.exe	93

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3700	powershell.exe

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	updater.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BitLockerToGo.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	powershell.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3700	powershell.exe
3700	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3700	powershell.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3700 wrote to memory of 2516	3700	powershell.exe	91
PID 3700 wrote to memory of 2516	3700	powershell.exe	91
PID 3700 wrote to memory of 2516	3700	powershell.exe	91
PID 2516 wrote to memory of 1704	2516	updater.exe	93
PID 2516 wrote to memory of 1704	2516	updater.exe	93
PID 2516 wrote to memory of 1704	2516	updater.exe	93
PID 2516 wrote to memory of 1704	2516	updater.exe	93
PID 2516 wrote to memory of 1704	2516	updater.exe	93
PID 2516 wrote to memory of 1704	2516	updater.exe	93
PID 2516 wrote to memory of 1704	2516	updater.exe	93
PID 2516 wrote to memory of 1704	2516	updater.exe	93
PID 2516 wrote to memory of 1704	2516	updater.exe	93
PID 2516 wrote to memory of 1704	2516	updater.exe	93
PID 2516 wrote to memory of 1704	2516	updater.exe	93

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\index.ps1
1⤵
- Blocklisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3700
- C:\Users\Admin\AppData\Local\3a98d52f-d7c8-4f2e-be12-39e2ff7f54f9\updater.exe
  "C:\Users\Admin\AppData\Local\3a98d52f-d7c8-4f2e-be12-39e2ff7f54f9\updater.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2516
- - C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe
    "C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1704

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\3a98d52f-d7c8-4f2e-be12-39e2ff7f54f9\updater.exe

Filesize
9.8MB

MD5
2a7ec240fa5e25c92b2b78c4f1002ea0

SHA1
bca1465b8bafa5fe58d96d4289356d40c3d44155

SHA256
2c973057cbbe0d9836f477281a06b51c6ce009c5ac7683f4255743e7d01ca9ca

SHA512
dba36379cd0532301193b25ffc4c9b74406efc08ca2d2ce0fec06c115abdde2ab0409bfda1f8bf85ce50764a59503ab0d5b1efbbd641b4caec1dde910d220df3

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pn5qt2h0.ptb.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1704-88-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/1704-80-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/1704-79-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/1704-78-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/3700-11-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/3700-16-0x00007FFFFDBF3000-0x00007FFFFDBF5000-memory.dmp

Filesize
8KB

Download
memory/3700-17-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/3700-15-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/3700-13-0x0000019FCA030000-0x0000019FCA7D6000-memory.dmp

Filesize
7.6MB

Download
memory/3700-12-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/3700-0-0x00007FFFFDBF3000-0x00007FFFFDBF5000-memory.dmp

Filesize
8KB

Download
memory/3700-10-0x0000019FB0F80000-0x0000019FB0FA2000-memory.dmp

Filesize
136KB

Download
memory/3700-91-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download