vidar | d466ef9698569363af4f08b64235817c7838c726c1faee300582aab3d90f5683

Analysis

max time kernel
67s
max time network
151s
platform
windows10_x64
resource
win10v20201028
submitted
09-03-2021 12:58

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General

Target

dubi.exe
Size

698KB
MD5

839609b011f03a293a0573ea5fb1277e
SHA1

fe48ac0a84e79bc2dd0024e55a62e86b077f8c12
SHA256

d466ef9698569363af4f08b64235817c7838c726c1faee300582aab3d90f5683
SHA512

526f6345e367950bc775213663fd68bd7bae2b82c71df70e8589dccc173da66af0171183c4abc4a102e45e151453ff8a8d67c2e4c8fcf72c54d85def22d37ac4

Score

10^/10

vidar discovery persistence spyware stealer

Malware Config

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
1904	updatewin.exe
1504	5.exe

Loads dropped DLL 2 IoCs

pid	Process
1504	5.exe
1504	5.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2568	icacls.exe

Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

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-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\556e4a1b-f0ae-42e9-bae4-cb4ebcfa510d\\dubi.exe\" --AutoStart"	dubi.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
11	api.2ip.ua
12	api.2ip.ua
21	api.2ip.ua

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	5.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	5.exe

Delays execution with timeout.exe 2 IoCs

evasion

pid	Process
2976	timeout.exe
1508	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
3604	taskkill.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

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

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
728	dubi.exe
728	dubi.exe
576	dubi.exe
576	dubi.exe
1504	5.exe
1504	5.exe
1504	5.exe
1504	5.exe
1504	5.exe
1504	5.exe
1504	5.exe
1504	5.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3604	taskkill.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 728 wrote to memory of 2568	728	dubi.exe	75
PID 728 wrote to memory of 2568	728	dubi.exe	75
PID 728 wrote to memory of 2568	728	dubi.exe	75
PID 728 wrote to memory of 576	728	dubi.exe	76
PID 728 wrote to memory of 576	728	dubi.exe	76
PID 728 wrote to memory of 576	728	dubi.exe	76
PID 576 wrote to memory of 1904	576	dubi.exe	80
PID 576 wrote to memory of 1904	576	dubi.exe	80
PID 576 wrote to memory of 1904	576	dubi.exe	80
PID 576 wrote to memory of 1504	576	dubi.exe	81
PID 576 wrote to memory of 1504	576	dubi.exe	81
PID 576 wrote to memory of 1504	576	dubi.exe	81
PID 1904 wrote to memory of 2900	1904	updatewin.exe	83
PID 1904 wrote to memory of 2900	1904	updatewin.exe	83
PID 1904 wrote to memory of 2900	1904	updatewin.exe	83
PID 2900 wrote to memory of 2976	2900	cmd.exe	85
PID 2900 wrote to memory of 2976	2900	cmd.exe	85
PID 2900 wrote to memory of 2976	2900	cmd.exe	85
PID 1504 wrote to memory of 1840	1504	5.exe	86
PID 1504 wrote to memory of 1840	1504	5.exe	86
PID 1504 wrote to memory of 1840	1504	5.exe	86
PID 1840 wrote to memory of 3604	1840	cmd.exe	88
PID 1840 wrote to memory of 3604	1840	cmd.exe	88
PID 1840 wrote to memory of 3604	1840	cmd.exe	88
PID 1840 wrote to memory of 1508	1840	cmd.exe	89
PID 1840 wrote to memory of 1508	1840	cmd.exe	89
PID 1840 wrote to memory of 1508	1840	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\dubi.exe
"C:\Users\Admin\AppData\Local\Temp\dubi.exe"
1⤵
- Adds Run key to start application
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:728
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\Users\Admin\AppData\Local\556e4a1b-f0ae-42e9-bae4-cb4ebcfa510d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
  2⤵
  - Modifies file permissions
  PID:2568
- C:\Users\Admin\AppData\Local\Temp\dubi.exe
  "C:\Users\Admin\AppData\Local\Temp\dubi.exe" --Admin IsNotAutoStart IsNotTask
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:576
- - C:\Users\Admin\AppData\Local\34290c94-8201-4e5a-8cc2-25c5d973227a\updatewin.exe
    "C:\Users\Admin\AppData\Local\34290c94-8201-4e5a-8cc2-25c5d973227a\updatewin.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:1904
  - - C:\Windows\SysWOW64\cmd.exe
      /c timeout /t 3 & del /f /q C:\Users\Admin\AppData\Local\34290c94-8201-4e5a-8cc2-25c5d973227a\updatewin.exe
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2900
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 3
        5⤵
        Delays execution with timeout.exe
        
        PID:2976
- - C:\Users\Admin\AppData\Local\34290c94-8201-4e5a-8cc2-25c5d973227a\5.exe
    "C:\Users\Admin\AppData\Local\34290c94-8201-4e5a-8cc2-25c5d973227a\5.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1504
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im 5.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\34290c94-8201-4e5a-8cc2-25c5d973227a\5.exe" & del C:\ProgramData\*.dll & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1840
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im 5.exe /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3604
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 6
        5⤵
        Delays execution with timeout.exe
        
        PID:1508

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/576-10-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/576-8-0x0000000003210000-0x0000000003211000-memory.dmp

Filesize
4KB

Download
memory/728-3-0x00000000031A0000-0x00000000032BA000-memory.dmp

Filesize
1.1MB

Download
memory/728-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/728-2-0x00000000031A0000-0x00000000031A1000-memory.dmp

Filesize
4KB

Download