vidar | bcba5928ffde896ba6925acda9a28f9236c5f11cf0e412d9f7e33b9fc8a69809

Analysis

max time kernel
150s
max time network
150s
platform
windows10_x64
resource
win10v20210410
submitted
16/07/2021, 08:15

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General

Target
341dbcdd8f6cb8fb49548eef04061b0d.exe
Size 740KB
Sample210716-ev7lvc19aj
SHA256 bcba5928ffde896ba6925acda9a28f9236c5f11cf0e412d9f7e33b9fc8a69809
MD5 341dbcdd8f6cb8fb49548eef04061b0d
SHA1 a9980d7924e69454635438d26fec48cbabc9830e
SHA512 ce6a2f81f1fa70339357b7d1616b56b6837df6a36a3bc2196ef7a1dbb577a2d29e5a534dcdc47b6d0a21610654d70f657227d18470ccf56b8781f272e1439280
MD5 SHA1 SHA512

Score

10^/10

vidar 517 discovery persistence ransomware spyware stealer

Malware Config

Extracted

Path

C:\_readme.txt

Ransom Note

ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-mNr1oio2P6 Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0316ewgfDdOcMcAt2OQZqFzJadYhow9MqoFd992adkvAnhUo2b

Emails

URLs

https://we.tl/t-mNr1oio2P6

Extracted

Family

vidar

Version

39.6

Botnet

https://sslamlssa1.tumblr.com/

Attributes

profile_id
517

Signatures

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

Vidar Stealer 4 IoCs

stealer

resource	yara_rule
behavioral2/memory/1116-131-0x0000000000400000-0x00000000004A1000-memory.dmp	family_vidar
behavioral2/memory/1116-132-0x000000000046B76D-mapping.dmp	family_vidar
behavioral2/memory/1116-135-0x0000000000400000-0x00000000004A1000-memory.dmp	family_vidar
behavioral2/memory/3792-134-0x0000000002670000-0x000000000270E000-memory.dmp	family_vidar

Downloads MZ/PE file

Executes dropped EXE 4 IoCs

pid	Process
3792	build2.exe
1116	build2.exe
3280	341dbcdd8f6cb8fb49548eef04061b0d.exe
744	341dbcdd8f6cb8fb49548eef04061b0d.exe

Modifies extensions of user files 2 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\ExportBlock.raw => C:\Users\Admin\Pictures\ExportBlock.raw.gujd	341dbcdd8f6cb8fb49548eef04061b0d.exe
File renamed	C:\Users\Admin\Pictures\SelectUnpublish.crw => C:\Users\Admin\Pictures\SelectUnpublish.crw.gujd	341dbcdd8f6cb8fb49548eef04061b0d.exe

Loads dropped DLL 2 IoCs

pid	Process
1116	build2.exe
1116	build2.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4032	icacls.exe

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
T1081
Accesses 2FA software files, possible credential harvesting 2 TTPs
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ab24e255-97d6-404c-bc7a-337c07b9c420\\341dbcdd8f6cb8fb49548eef04061b0d.exe\" --AutoStart"	341dbcdd8f6cb8fb49548eef04061b0d.exe

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

Looks up external IP address via web service 4 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
12	api.2ip.ua
20	api.2ip.ua
37	api.2ip.ua
11	api.2ip.ua

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 3172 set thread context of 2548	3172	341dbcdd8f6cb8fb49548eef04061b0d.exe	76
PID 3404 set thread context of 1232	3404	341dbcdd8f6cb8fb49548eef04061b0d.exe	82
PID 3792 set thread context of 1116	3792	build2.exe	85
PID 3280 set thread context of 744	3280	341dbcdd8f6cb8fb49548eef04061b0d.exe	91

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

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	build2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	build2.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3988	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
3440	taskkill.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	341dbcdd8f6cb8fb49548eef04061b0d.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349	341dbcdd8f6cb8fb49548eef04061b0d.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
2548	341dbcdd8f6cb8fb49548eef04061b0d.exe
2548	341dbcdd8f6cb8fb49548eef04061b0d.exe
1232	341dbcdd8f6cb8fb49548eef04061b0d.exe
1232	341dbcdd8f6cb8fb49548eef04061b0d.exe
1116	build2.exe
1116	build2.exe
1116	build2.exe
1116	build2.exe
1116	build2.exe
1116	build2.exe
1116	build2.exe
1116	build2.exe
744	341dbcdd8f6cb8fb49548eef04061b0d.exe
744	341dbcdd8f6cb8fb49548eef04061b0d.exe
1232	341dbcdd8f6cb8fb49548eef04061b0d.exe
1232	341dbcdd8f6cb8fb49548eef04061b0d.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3440	taskkill.exe

Suspicious use of WriteProcessMemory 56 IoCs

description	pid	Process	procid_target
PID 3172 wrote to memory of 2548	3172	341dbcdd8f6cb8fb49548eef04061b0d.exe	76
PID 3172 wrote to memory of 2548	3172	341dbcdd8f6cb8fb49548eef04061b0d.exe	76
PID 3172 wrote to memory of 2548	3172	341dbcdd8f6cb8fb49548eef04061b0d.exe	76
PID 3172 wrote to memory of 2548	3172	341dbcdd8f6cb8fb49548eef04061b0d.exe	76
PID 3172 wrote to memory of 2548	3172	341dbcdd8f6cb8fb49548eef04061b0d.exe	76
PID 3172 wrote to memory of 2548	3172	341dbcdd8f6cb8fb49548eef04061b0d.exe	76
PID 3172 wrote to memory of 2548	3172	341dbcdd8f6cb8fb49548eef04061b0d.exe	76
PID 3172 wrote to memory of 2548	3172	341dbcdd8f6cb8fb49548eef04061b0d.exe	76
PID 3172 wrote to memory of 2548	3172	341dbcdd8f6cb8fb49548eef04061b0d.exe	76
PID 3172 wrote to memory of 2548	3172	341dbcdd8f6cb8fb49548eef04061b0d.exe	76
PID 2548 wrote to memory of 4032	2548	341dbcdd8f6cb8fb49548eef04061b0d.exe	77
PID 2548 wrote to memory of 4032	2548	341dbcdd8f6cb8fb49548eef04061b0d.exe	77
PID 2548 wrote to memory of 4032	2548	341dbcdd8f6cb8fb49548eef04061b0d.exe	77
PID 2548 wrote to memory of 3404	2548	341dbcdd8f6cb8fb49548eef04061b0d.exe	78
PID 2548 wrote to memory of 3404	2548	341dbcdd8f6cb8fb49548eef04061b0d.exe	78
PID 2548 wrote to memory of 3404	2548	341dbcdd8f6cb8fb49548eef04061b0d.exe	78
PID 3404 wrote to memory of 1232	3404	341dbcdd8f6cb8fb49548eef04061b0d.exe	82
PID 3404 wrote to memory of 1232	3404	341dbcdd8f6cb8fb49548eef04061b0d.exe	82
PID 3404 wrote to memory of 1232	3404	341dbcdd8f6cb8fb49548eef04061b0d.exe	82
PID 3404 wrote to memory of 1232	3404	341dbcdd8f6cb8fb49548eef04061b0d.exe	82
PID 3404 wrote to memory of 1232	3404	341dbcdd8f6cb8fb49548eef04061b0d.exe	82
PID 3404 wrote to memory of 1232	3404	341dbcdd8f6cb8fb49548eef04061b0d.exe	82
PID 3404 wrote to memory of 1232	3404	341dbcdd8f6cb8fb49548eef04061b0d.exe	82
PID 3404 wrote to memory of 1232	3404	341dbcdd8f6cb8fb49548eef04061b0d.exe	82
PID 3404 wrote to memory of 1232	3404	341dbcdd8f6cb8fb49548eef04061b0d.exe	82
PID 3404 wrote to memory of 1232	3404	341dbcdd8f6cb8fb49548eef04061b0d.exe	82
PID 1232 wrote to memory of 3792	1232	341dbcdd8f6cb8fb49548eef04061b0d.exe	84
PID 1232 wrote to memory of 3792	1232	341dbcdd8f6cb8fb49548eef04061b0d.exe	84
PID 1232 wrote to memory of 3792	1232	341dbcdd8f6cb8fb49548eef04061b0d.exe	84
PID 3792 wrote to memory of 1116	3792	build2.exe	85
PID 3792 wrote to memory of 1116	3792	build2.exe	85
PID 3792 wrote to memory of 1116	3792	build2.exe	85
PID 3792 wrote to memory of 1116	3792	build2.exe	85
PID 3792 wrote to memory of 1116	3792	build2.exe	85
PID 3792 wrote to memory of 1116	3792	build2.exe	85
PID 3792 wrote to memory of 1116	3792	build2.exe	85
PID 3792 wrote to memory of 1116	3792	build2.exe	85
PID 1116 wrote to memory of 1664	1116	build2.exe	86
PID 1116 wrote to memory of 1664	1116	build2.exe	86
PID 1116 wrote to memory of 1664	1116	build2.exe	86
PID 1664 wrote to memory of 3440	1664	cmd.exe	88
PID 1664 wrote to memory of 3440	1664	cmd.exe	88
PID 1664 wrote to memory of 3440	1664	cmd.exe	88
PID 1664 wrote to memory of 3988	1664	cmd.exe	89
PID 1664 wrote to memory of 3988	1664	cmd.exe	89
PID 1664 wrote to memory of 3988	1664	cmd.exe	89
PID 3280 wrote to memory of 744	3280	341dbcdd8f6cb8fb49548eef04061b0d.exe	91
PID 3280 wrote to memory of 744	3280	341dbcdd8f6cb8fb49548eef04061b0d.exe	91
PID 3280 wrote to memory of 744	3280	341dbcdd8f6cb8fb49548eef04061b0d.exe	91
PID 3280 wrote to memory of 744	3280	341dbcdd8f6cb8fb49548eef04061b0d.exe	91
PID 3280 wrote to memory of 744	3280	341dbcdd8f6cb8fb49548eef04061b0d.exe	91
PID 3280 wrote to memory of 744	3280	341dbcdd8f6cb8fb49548eef04061b0d.exe	91
PID 3280 wrote to memory of 744	3280	341dbcdd8f6cb8fb49548eef04061b0d.exe	91
PID 3280 wrote to memory of 744	3280	341dbcdd8f6cb8fb49548eef04061b0d.exe	91
PID 3280 wrote to memory of 744	3280	341dbcdd8f6cb8fb49548eef04061b0d.exe	91
PID 3280 wrote to memory of 744	3280	341dbcdd8f6cb8fb49548eef04061b0d.exe	91

C:\Users\Admin\AppData\Local\Temp\341dbcdd8f6cb8fb49548eef04061b0d.exe
"C:\Users\Admin\AppData\Local\Temp\341dbcdd8f6cb8fb49548eef04061b0d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3172
- C:\Users\Admin\AppData\Local\Temp\341dbcdd8f6cb8fb49548eef04061b0d.exe
  "C:\Users\Admin\AppData\Local\Temp\341dbcdd8f6cb8fb49548eef04061b0d.exe"
  2⤵
  - Adds Run key to start application
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2548
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\ab24e255-97d6-404c-bc7a-337c07b9c420" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4032
- - C:\Users\Admin\AppData\Local\Temp\341dbcdd8f6cb8fb49548eef04061b0d.exe
    "C:\Users\Admin\AppData\Local\Temp\341dbcdd8f6cb8fb49548eef04061b0d.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3404
  - - C:\Users\Admin\AppData\Local\Temp\341dbcdd8f6cb8fb49548eef04061b0d.exe
      "C:\Users\Admin\AppData\Local\Temp\341dbcdd8f6cb8fb49548eef04061b0d.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Modifies extensions of user files
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:1232
    - - C:\Users\Admin\AppData\Local\62fb9df9-7eee-4f71-b64a-9d0419b51b06\build2.exe
        
        "C:\Users\Admin\AppData\Local\62fb9df9-7eee-4f71-b64a-9d0419b51b06\build2.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:3792
      - C:\Users\Admin\AppData\Local\62fb9df9-7eee-4f71-b64a-9d0419b51b06\build2.exe
        
        "C:\Users\Admin\AppData\Local\62fb9df9-7eee-4f71-b64a-9d0419b51b06\build2.exe"
        6⤵
        Executes dropped EXE
        Loads dropped DLL
        Checks processor information in registry
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:1116
        
        C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\62fb9df9-7eee-4f71-b64a-9d0419b51b06\build2.exe" & del C:\ProgramData\*.dll & exit
        7⤵
        Suspicious use of WriteProcessMemory
        
        PID:1664
        
        C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im build2.exe /f
        8⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3440
        
        C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 6
        8⤵
        Delays execution with timeout.exe
        
        PID:3988

C:\Users\Admin\AppData\Local\ab24e255-97d6-404c-bc7a-337c07b9c420\341dbcdd8f6cb8fb49548eef04061b0d.exe
C:\Users\Admin\AppData\Local\ab24e255-97d6-404c-bc7a-337c07b9c420\341dbcdd8f6cb8fb49548eef04061b0d.exe --Task
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3280
- C:\Users\Admin\AppData\Local\ab24e255-97d6-404c-bc7a-337c07b9c420\341dbcdd8f6cb8fb49548eef04061b0d.exe
  C:\Users\Admin\AppData\Local\ab24e255-97d6-404c-bc7a-337c07b9c420\341dbcdd8f6cb8fb49548eef04061b0d.exe --Task
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  PID:744

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

Install Root Certificate

T1130

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/744-151-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1116-135-0x0000000000400000-0x00000000004A1000-memory.dmp

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memory/1116-131-0x0000000000400000-0x00000000004A1000-memory.dmp

Download

memory/1232-127-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2548-114-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2548-119-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/3172-118-0x0000000002830000-0x000000000294B000-memory.dmp

Download

memory/3792-134-0x0000000002670000-0x000000000270E000-memory.dmp

Download