vidar | e4b94bbbc90229ebdfc4a28028890d73fc085f460e9dac460bb4192417b4d7d3

Resubmissions

20/01/2025, 22:03

250120-1ye4js1pgl 10

20/01/2025, 21:44

250120-1lsh4s1kbj 10

Analysis

max time kernel
209s
max time network
222s
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, 21:44

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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 4 IoCs

flow	pid	Process
8	412	powershell.exe
10	412	powershell.exe
71	5020	powershell.exe
72	5020	powershell.exe

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
4844	updater.exe
1028	updater.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4844 set thread context of 4740	4844	updater.exe	101
PID 1028 set thread context of 3816	1028	updater.exe	118

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
412	powershell.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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
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 2 IoCs

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
412	powershell.exe
412	powershell.exe
5020	powershell.exe
5020	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	412	powershell.exe
Token: SeDebugPrivilege	5020	powershell.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 412 wrote to memory of 4844	412	powershell.exe	93
PID 412 wrote to memory of 4844	412	powershell.exe	93
PID 412 wrote to memory of 4844	412	powershell.exe	93
PID 4844 wrote to memory of 4740	4844	updater.exe	101
PID 4844 wrote to memory of 4740	4844	updater.exe	101
PID 4844 wrote to memory of 4740	4844	updater.exe	101
PID 4844 wrote to memory of 4740	4844	updater.exe	101
PID 4844 wrote to memory of 4740	4844	updater.exe	101
PID 4844 wrote to memory of 4740	4844	updater.exe	101
PID 4844 wrote to memory of 4740	4844	updater.exe	101
PID 4844 wrote to memory of 4740	4844	updater.exe	101
PID 4844 wrote to memory of 4740	4844	updater.exe	101
PID 4844 wrote to memory of 4740	4844	updater.exe	101
PID 4844 wrote to memory of 4740	4844	updater.exe	101
PID 5020 wrote to memory of 1028	5020	powershell.exe	117
PID 5020 wrote to memory of 1028	5020	powershell.exe	117
PID 5020 wrote to memory of 1028	5020	powershell.exe	117
PID 1028 wrote to memory of 3816	1028	updater.exe	118
PID 1028 wrote to memory of 3816	1028	updater.exe	118
PID 1028 wrote to memory of 3816	1028	updater.exe	118
PID 1028 wrote to memory of 3816	1028	updater.exe	118
PID 1028 wrote to memory of 3816	1028	updater.exe	118
PID 1028 wrote to memory of 3816	1028	updater.exe	118
PID 1028 wrote to memory of 3816	1028	updater.exe	118
PID 1028 wrote to memory of 3816	1028	updater.exe	118
PID 1028 wrote to memory of 3816	1028	updater.exe	118
PID 1028 wrote to memory of 3816	1028	updater.exe	118
PID 1028 wrote to memory of 3816	1028	updater.exe	118

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:412
- C:\Users\Admin\AppData\Local\688fdb1d-d280-4c8d-917e-c381a64091f5\updater.exe
  "C:\Users\Admin\AppData\Local\688fdb1d-d280-4c8d-917e-c381a64091f5\updater.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4844
- - C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe
    "C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4740

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"
1⤵
- Blocklisted process makes network request
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5020
- C:\Users\Admin\AppData\Local\4acf8ac2-e0cf-4ffa-9abc-f79e8bd4d00f\updater.exe
  "C:\Users\Admin\AppData\Local\4acf8ac2-e0cf-4ffa-9abc-f79e8bd4d00f\updater.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1028
- - C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe
    "C:\Windows\BitLockerDiscoveryVolumeContents\BitLockerToGo.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3816

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\LocalLow\Microsoft\CryptnetUrlCache\Content\103621DE9CD5414CC2538780B4B75751

Filesize
734B

MD5
e192462f281446b5d1500d474fbacc4b

SHA1
5ed0044ac937193b78f9878ad7bac5c9ff7534ff

SHA256
f1ba9f1b63c447682ebf9de956d0da2a027b1b779abef9522d347d3479139a60

SHA512
cc69a761a4e8e1d4bf6585aa8e3e5a7dfed610f540a6d43a288ebb35b16e669874ed5d2b06756ee4f30854f6465c84ee423502fc5b67ee9e7758a2dab41b31d3

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\98DAC58D087487146B87454EFABEB371

Filesize
344B

MD5
7ac7ff0af939af20b4c249825d91cc7c

SHA1
f2fca96f084903642a67f44443b5bea851a0d3c1

SHA256
d19928671a68a83ac985d5881aa45bea0cd35789adc8103580a4d10d67028f3e

SHA512
9bccdcbd31bd0297ad3feadb230212e7ad4c95f6c9f784008657233d9c3394e12c0d2260d5cfba16d07ec954a242d9d0ee28c7bf370f9bcaa8dbd401178ebaae

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\103621DE9CD5414CC2538780B4B75751

Filesize
192B

MD5
c519352b0aa71ea6ec862c409b21fb41

SHA1
3e18b364d6a826b5a5ccc0e76ae326c85910beb3

SHA256
7ccdf977ee8727843e3628f48a4643c766ec6e59fe3cdf1ab5b57061c12dad07

SHA512
67b79327517c372fc070d131975019be43e8266214c21243a503e6584f5ec9753445df9aa1889eca8d92ff0c299fce5abbcbfd2cb8b81fd223a702ce3688cdeb

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\98DAC58D087487146B87454EFABEB371

Filesize
540B

MD5
98e32392689e8001291629bf9dc9e6c1

SHA1
0d6739cba1a7b301b81eb2bedeb4a93999a0a7a5

SHA256
afb45d61e8562cac10761ddec20373abef89b9a4ba359a9c7d540a7ff4bfaff5

SHA512
7a6ded1106fc74836537d7ad7801b5583c700632fe5a663daeaba4c1059802a0d358fdcd92a21685876258b8d3ec846a7254245dd7b4dd1e4dfd4655faab2632

Download Submit
C:\Users\Admin\AppData\Local\688fdb1d-d280-4c8d-917e-c381a64091f5\updater.exe

Filesize
9.8MB

MD5
2a7ec240fa5e25c92b2b78c4f1002ea0

SHA1
bca1465b8bafa5fe58d96d4289356d40c3d44155

SHA256
2c973057cbbe0d9836f477281a06b51c6ce009c5ac7683f4255743e7d01ca9ca

SHA512
dba36379cd0532301193b25ffc4c9b74406efc08ca2d2ce0fec06c115abdde2ab0409bfda1f8bf85ce50764a59503ab0d5b1efbbd641b4caec1dde910d220df3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
556084f2c6d459c116a69d6fedcc4105

SHA1
633e89b9a1e77942d822d14de6708430a3944dbc

SHA256
88cc4f40f0eb08ff5c487d6db341b046cc63b22534980aca66a9f8480692f3a8

SHA512
0f6557027b098e45556af93e0be1db9a49c6416dc4afcff2cc2135a8a1ad4f1cf7185541ddbe6c768aefaf2c1a8e52d5282a538d15822d19932f22316edd283e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hwq4fpid.uh1.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/412-12-0x00007FFC72ED0000-0x00007FFC73991000-memory.dmp

Filesize
10.8MB

Download
memory/412-17-0x000001656E000000-0x000001656E21C000-memory.dmp

Filesize
2.1MB

Download
memory/412-16-0x00007FFC72ED0000-0x00007FFC73991000-memory.dmp

Filesize
10.8MB

Download
memory/412-0-0x00007FFC72ED3000-0x00007FFC72ED5000-memory.dmp

Filesize
8KB

Download
memory/412-15-0x00007FFC72ED3000-0x00007FFC72ED5000-memory.dmp

Filesize
8KB

Download
memory/412-13-0x000001656EEA0000-0x000001656F646000-memory.dmp

Filesize
7.6MB

Download
memory/412-93-0x00007FFC72ED0000-0x00007FFC73991000-memory.dmp

Filesize
10.8MB

Download
memory/412-11-0x00007FFC72ED0000-0x00007FFC73991000-memory.dmp

Filesize
10.8MB

Download
memory/412-10-0x000001656DF70000-0x000001656DF92000-memory.dmp

Filesize
136KB

Download
memory/3816-173-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/4740-79-0x0000000000340000-0x00000000003A0000-memory.dmp

Filesize
384KB

Download
memory/4740-84-0x0000000000340000-0x00000000003A0000-memory.dmp

Filesize
384KB

Download
memory/4740-80-0x0000000000340000-0x00000000003A0000-memory.dmp

Filesize
384KB

Download
memory/5020-107-0x0000024AE9D80000-0x0000024AE9DF6000-memory.dmp

Filesize
472KB

Download
memory/5020-106-0x0000024AE9CB0000-0x0000024AE9CF4000-memory.dmp

Filesize
272KB

Download