vidar | bfbf6bb9393e511a06e90d432e7538059ae75f9f1525f0f503d1d0bec0d32124

Analysis

max time kernel
67s
max time network
135s
platform
windows10_x64
resource
win10v20210408
submitted
10/07/2021, 06:08

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General

Target
d6574d1dc02e124a977f13cca79ac160.exe
Size 801KB
Sample210710-xeeqpfc8lj
SHA256 bfbf6bb9393e511a06e90d432e7538059ae75f9f1525f0f503d1d0bec0d32124
MD5 d6574d1dc02e124a977f13cca79ac160
SHA1 2f9348fb3f4da0b010a42a759a794ebdbf1ccdcc
SHA512 667000eccbc8da7bbfbc3a041968374334fc7a79d491d56ab0fdac118f4b9c0276c894cd80032c180f90dbdea4797cf59db92a1c812689cf1021b44a680bdee7
MD5 SHA1 SHA512

Score

10^/10

vidar 517 discovery persistence spyware stealer

Malware Config

Extracted

Family

vidar

Version

39.4

Botnet

https://sergeevih43.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/3968-131-0x0000000000400000-0x00000000004A1000-memory.dmp	family_vidar
behavioral2/memory/3968-132-0x000000000046B76D-mapping.dmp	family_vidar
behavioral2/memory/3968-135-0x0000000000400000-0x00000000004A1000-memory.dmp	family_vidar
behavioral2/memory/2204-134-0x00000000021D0000-0x000000000226E000-memory.dmp	family_vidar

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
2204	build2.exe
3968	build2.exe

Loads dropped DLL 2 IoCs

pid	Process
3968	build2.exe
3968	build2.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
188	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-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\0b76d237-42cc-4c10-9c71-31eb66e4bcb0\\d6574d1dc02e124a977f13cca79ac160.exe\" --AutoStart"	d6574d1dc02e124a977f13cca79ac160.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 3 IoCs

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

flow	ioc
10	api.2ip.ua
11	api.2ip.ua
20	api.2ip.ua

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 632 set thread context of 500	632	d6574d1dc02e124a977f13cca79ac160.exe	75
PID 3812 set thread context of 3668	3812	d6574d1dc02e124a977f13cca79ac160.exe	81
PID 2204 set thread context of 3968	2204	build2.exe	84

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
3920	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
184	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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	d6574d1dc02e124a977f13cca79ac160.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349	d6574d1dc02e124a977f13cca79ac160.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
500	d6574d1dc02e124a977f13cca79ac160.exe
500	d6574d1dc02e124a977f13cca79ac160.exe
3668	d6574d1dc02e124a977f13cca79ac160.exe
3668	d6574d1dc02e124a977f13cca79ac160.exe
3968	build2.exe
3968	build2.exe
3968	build2.exe
3968	build2.exe
3968	build2.exe
3968	build2.exe
3968	build2.exe
3968	build2.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	184	taskkill.exe

Suspicious use of WriteProcessMemory 46 IoCs

description	pid	Process	procid_target
PID 632 wrote to memory of 500	632	d6574d1dc02e124a977f13cca79ac160.exe	75
PID 632 wrote to memory of 500	632	d6574d1dc02e124a977f13cca79ac160.exe	75
PID 632 wrote to memory of 500	632	d6574d1dc02e124a977f13cca79ac160.exe	75
PID 632 wrote to memory of 500	632	d6574d1dc02e124a977f13cca79ac160.exe	75
PID 632 wrote to memory of 500	632	d6574d1dc02e124a977f13cca79ac160.exe	75
PID 632 wrote to memory of 500	632	d6574d1dc02e124a977f13cca79ac160.exe	75
PID 632 wrote to memory of 500	632	d6574d1dc02e124a977f13cca79ac160.exe	75
PID 632 wrote to memory of 500	632	d6574d1dc02e124a977f13cca79ac160.exe	75
PID 632 wrote to memory of 500	632	d6574d1dc02e124a977f13cca79ac160.exe	75
PID 632 wrote to memory of 500	632	d6574d1dc02e124a977f13cca79ac160.exe	75
PID 500 wrote to memory of 188	500	d6574d1dc02e124a977f13cca79ac160.exe	76
PID 500 wrote to memory of 188	500	d6574d1dc02e124a977f13cca79ac160.exe	76
PID 500 wrote to memory of 188	500	d6574d1dc02e124a977f13cca79ac160.exe	76
PID 500 wrote to memory of 3812	500	d6574d1dc02e124a977f13cca79ac160.exe	77
PID 500 wrote to memory of 3812	500	d6574d1dc02e124a977f13cca79ac160.exe	77
PID 500 wrote to memory of 3812	500	d6574d1dc02e124a977f13cca79ac160.exe	77
PID 3812 wrote to memory of 3668	3812	d6574d1dc02e124a977f13cca79ac160.exe	81
PID 3812 wrote to memory of 3668	3812	d6574d1dc02e124a977f13cca79ac160.exe	81
PID 3812 wrote to memory of 3668	3812	d6574d1dc02e124a977f13cca79ac160.exe	81
PID 3812 wrote to memory of 3668	3812	d6574d1dc02e124a977f13cca79ac160.exe	81
PID 3812 wrote to memory of 3668	3812	d6574d1dc02e124a977f13cca79ac160.exe	81
PID 3812 wrote to memory of 3668	3812	d6574d1dc02e124a977f13cca79ac160.exe	81
PID 3812 wrote to memory of 3668	3812	d6574d1dc02e124a977f13cca79ac160.exe	81
PID 3812 wrote to memory of 3668	3812	d6574d1dc02e124a977f13cca79ac160.exe	81
PID 3812 wrote to memory of 3668	3812	d6574d1dc02e124a977f13cca79ac160.exe	81
PID 3812 wrote to memory of 3668	3812	d6574d1dc02e124a977f13cca79ac160.exe	81
PID 3668 wrote to memory of 2204	3668	d6574d1dc02e124a977f13cca79ac160.exe	82
PID 3668 wrote to memory of 2204	3668	d6574d1dc02e124a977f13cca79ac160.exe	82
PID 3668 wrote to memory of 2204	3668	d6574d1dc02e124a977f13cca79ac160.exe	82
PID 2204 wrote to memory of 3968	2204	build2.exe	84
PID 2204 wrote to memory of 3968	2204	build2.exe	84
PID 2204 wrote to memory of 3968	2204	build2.exe	84
PID 2204 wrote to memory of 3968	2204	build2.exe	84
PID 2204 wrote to memory of 3968	2204	build2.exe	84
PID 2204 wrote to memory of 3968	2204	build2.exe	84
PID 2204 wrote to memory of 3968	2204	build2.exe	84
PID 2204 wrote to memory of 3968	2204	build2.exe	84
PID 3968 wrote to memory of 1008	3968	build2.exe	85
PID 3968 wrote to memory of 1008	3968	build2.exe	85
PID 3968 wrote to memory of 1008	3968	build2.exe	85
PID 1008 wrote to memory of 184	1008	cmd.exe	87
PID 1008 wrote to memory of 184	1008	cmd.exe	87
PID 1008 wrote to memory of 184	1008	cmd.exe	87
PID 1008 wrote to memory of 3920	1008	cmd.exe	89
PID 1008 wrote to memory of 3920	1008	cmd.exe	89
PID 1008 wrote to memory of 3920	1008	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\d6574d1dc02e124a977f13cca79ac160.exe
"C:\Users\Admin\AppData\Local\Temp\d6574d1dc02e124a977f13cca79ac160.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:632
- C:\Users\Admin\AppData\Local\Temp\d6574d1dc02e124a977f13cca79ac160.exe
  "C:\Users\Admin\AppData\Local\Temp\d6574d1dc02e124a977f13cca79ac160.exe"
  2⤵
  - Adds Run key to start application
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:500
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\0b76d237-42cc-4c10-9c71-31eb66e4bcb0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:188
- - C:\Users\Admin\AppData\Local\Temp\d6574d1dc02e124a977f13cca79ac160.exe
    "C:\Users\Admin\AppData\Local\Temp\d6574d1dc02e124a977f13cca79ac160.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3812
  - - C:\Users\Admin\AppData\Local\Temp\d6574d1dc02e124a977f13cca79ac160.exe
      "C:\Users\Admin\AppData\Local\Temp\d6574d1dc02e124a977f13cca79ac160.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:3668
    - - C:\Users\Admin\AppData\Local\9d3da0d3-2b1e-4b62-b31a-02b6366da3dd\build2.exe
        
        "C:\Users\Admin\AppData\Local\9d3da0d3-2b1e-4b62-b31a-02b6366da3dd\build2.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:2204
      - C:\Users\Admin\AppData\Local\9d3da0d3-2b1e-4b62-b31a-02b6366da3dd\build2.exe
        
        "C:\Users\Admin\AppData\Local\9d3da0d3-2b1e-4b62-b31a-02b6366da3dd\build2.exe"
        6⤵
        Executes dropped EXE
        Loads dropped DLL
        Checks processor information in registry
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:3968
        
        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\9d3da0d3-2b1e-4b62-b31a-02b6366da3dd\build2.exe" & del C:\ProgramData\*.dll & exit
        7⤵
        Suspicious use of WriteProcessMemory
        
        PID:1008
        
        C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im build2.exe /f
        8⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:184
        
        C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 6
        8⤵
        Delays execution with timeout.exe
        
        PID:3920

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/500-115-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/500-117-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/632-114-0x0000000002300000-0x000000000241B000-memory.dmp

Download

memory/2204-134-0x00000000021D0000-0x000000000226E000-memory.dmp

Download

memory/3668-127-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/3968-135-0x0000000000400000-0x00000000004A1000-memory.dmp

Download

memory/3968-131-0x0000000000400000-0x00000000004A1000-memory.dmp

Download