vidar | 20b3dc9a088153eb974afee08192cd0b78c96b847e5705cea818c50043c3bddf

General

Target

file01.ps1
Size

35B
MD5

684c57981b5ed26047c34aee9a2453a1
SHA1

2e154e9c0e6abc9a2bc852aeb941fe5d3117fa3e
SHA256

20b3dc9a088153eb974afee08192cd0b78c96b847e5705cea818c50043c3bddf
SHA512

cca14c6add1e0dfed54e0fe425489bf430bcc438acf386fe4d68cf040fbe55e9997b0d85bcd8cca56e66721292497894b599c919f3af248b4a2ef8a1d112c51b

Score

10^/10

vidar fc0stn discovery execution stealer

Malware Config

Extracted

Family

vidar

Botnet

fc0stn

C2

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
2	2168	powershell.exe
3	2168	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
1172	updater.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1172 set thread context of 2028	1172	updater.exe	79

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2168	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	BitLockerToGo.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	updater.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	powershell.exe
Key created	\REGISTRY\USER\S-1-5-21-1537126222-899333903-2037027349-1000_Classes\Local Settings\MuiCache	MiniSearchHost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2168	powershell.exe
2168	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2168	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2352	MiniSearchHost.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2168 wrote to memory of 1172	2168	powershell.exe	78
PID 2168 wrote to memory of 1172	2168	powershell.exe	78
PID 2168 wrote to memory of 1172	2168	powershell.exe	78
PID 1172 wrote to memory of 2028	1172	updater.exe	79
PID 1172 wrote to memory of 2028	1172	updater.exe	79
PID 1172 wrote to memory of 2028	1172	updater.exe	79
PID 1172 wrote to memory of 2028	1172	updater.exe	79
PID 1172 wrote to memory of 2028	1172	updater.exe	79
PID 1172 wrote to memory of 2028	1172	updater.exe	79
PID 1172 wrote to memory of 2028	1172	updater.exe	79
PID 1172 wrote to memory of 2028	1172	updater.exe	79
PID 1172 wrote to memory of 2028	1172	updater.exe	79
PID 1172 wrote to memory of 2028	1172	updater.exe	79
PID 1172 wrote to memory of 2028	1172	updater.exe	79

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\file01.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:2168
- C:\Users\Admin\AppData\Local\ec80017f-5613-409a-9855-9a9719961a06\updater.exe
  "C:\Users\Admin\AppData\Local\ec80017f-5613-409a-9855-9a9719961a06\updater.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1172
- - C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe
    "C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2028

C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:2352

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

Filesize
10KB

MD5
327975ba2c226434c0009085b3702a06

SHA1
b7b8b25656b3caefad9c5a657f101f06e2024bbd

SHA256
6fa9064f304b70d6dcebee643ca017c2417ff325106917058f6e11341678583c

SHA512
150a57c143fc5ff2462f496f5a9451310b8d99e32c4d570641204c8062a78590f14bed438ac981e8b0609a0c87b859a1f8502a78687bc36c3a9529d633a58e51

Download Submit
C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

Filesize
10KB

MD5
785073822344ae3813284ebc92bb596a

SHA1
96e2a933b38352ed2c8e6e34e94756b70c143214

SHA256
36ef4cbbc494deacf81f364b546281223a39bea01a32b0c4b0e2324f984d6817

SHA512
28b21e17fdf026a025503a2ae1014ea4e8ce5385e42396007a7a23aba3aecb591d225e2a90d47f6f9e02d34792d74b89547715d66899265dbf8372258ccf4498

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vr51o5r0.nau.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\ec80017f-5613-409a-9855-9a9719961a06\updater.exe

Filesize
9.8MB

MD5
2a7ec240fa5e25c92b2b78c4f1002ea0

SHA1
bca1465b8bafa5fe58d96d4289356d40c3d44155

SHA256
2c973057cbbe0d9836f477281a06b51c6ce009c5ac7683f4255743e7d01ca9ca

SHA512
dba36379cd0532301193b25ffc4c9b74406efc08ca2d2ce0fec06c115abdde2ab0409bfda1f8bf85ce50764a59503ab0d5b1efbbd641b4caec1dde910d220df3

Download Submit
memory/2028-84-0x0000000000600000-0x0000000000660000-memory.dmp

Filesize
384KB

Download
memory/2028-80-0x0000000000600000-0x0000000000660000-memory.dmp

Filesize
384KB

Download
memory/2028-79-0x0000000000600000-0x0000000000660000-memory.dmp

Filesize
384KB

Download
memory/2168-11-0x00007FFBDD050000-0x00007FFBDDB12000-memory.dmp

Filesize
10.8MB

Download
memory/2168-16-0x00007FFBDD050000-0x00007FFBDDB12000-memory.dmp

Filesize
10.8MB

Download
memory/2168-17-0x00007FFBDD050000-0x00007FFBDDB12000-memory.dmp

Filesize
10.8MB

Download
memory/2168-18-0x00007FFBDD050000-0x00007FFBDDB12000-memory.dmp

Filesize
10.8MB

Download
memory/2168-15-0x00007FFBDD053000-0x00007FFBDD055000-memory.dmp

Filesize
8KB

Download
memory/2168-13-0x000001BCE5470000-0x000001BCE5C16000-memory.dmp

Filesize
7.6MB

Download
memory/2168-12-0x00007FFBDD050000-0x00007FFBDDB12000-memory.dmp

Filesize
10.8MB

Download
memory/2168-0-0x00007FFBDD053000-0x00007FFBDD055000-memory.dmp

Filesize
8KB

Download
memory/2168-95-0x00007FFBDD050000-0x00007FFBDDB12000-memory.dmp

Filesize
10.8MB

Download
memory/2168-10-0x00007FFBDD050000-0x00007FFBDDB12000-memory.dmp

Filesize
10.8MB

Download
memory/2168-9-0x000001BCE48C0000-0x000001BCE48E2000-memory.dmp

Filesize
136KB

Download

Analysis

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