vidar | 894efce31cc70924a097c89b02eb544cb1303268b569f39ccbfba492d6c2b166

Analysis

max time kernel
77s
max time network
124s
platform
windows10_x64
resource
win10v20201028
submitted
10-03-2021 10:05

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General

Target

648f0d37b65ec97fd1754d53d78a6a24.exe
Size

827KB
MD5

648f0d37b65ec97fd1754d53d78a6a24
SHA1

ba9c8a94d83f66f93523345aa7fe266cf9769a0e
SHA256

894efce31cc70924a097c89b02eb544cb1303268b569f39ccbfba492d6c2b166
SHA512

e222e2ef11a00605575bc8431587f9e89dbd6c3579f43cd36c97527385c85e837f831a583ede7a4c3413f6c0c8ff2139c4b1e4821224c6e4f57eb5cd18fe8410

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
1008	updatewin.exe
1412	5.exe

Loads dropped DLL 2 IoCs

pid	Process
1412	5.exe
1412	5.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4392	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-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\22f227d2-1ffb-49e1-ba99-b15cc028309d\\648f0d37b65ec97fd1754d53d78a6a24.exe\" --AutoStart"	648f0d37b65ec97fd1754d53d78a6a24.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
7	api.2ip.ua
8	api.2ip.ua
18	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
2564	timeout.exe
3280	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2248	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	648f0d37b65ec97fd1754d53d78a6a24.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	648f0d37b65ec97fd1754d53d78a6a24.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
4808	648f0d37b65ec97fd1754d53d78a6a24.exe
4808	648f0d37b65ec97fd1754d53d78a6a24.exe
3380	648f0d37b65ec97fd1754d53d78a6a24.exe
3380	648f0d37b65ec97fd1754d53d78a6a24.exe
1412	5.exe
1412	5.exe
1412	5.exe
1412	5.exe
1412	5.exe
1412	5.exe
1412	5.exe
1412	5.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2248	taskkill.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 4808 wrote to memory of 4392	4808	648f0d37b65ec97fd1754d53d78a6a24.exe	75
PID 4808 wrote to memory of 4392	4808	648f0d37b65ec97fd1754d53d78a6a24.exe	75
PID 4808 wrote to memory of 4392	4808	648f0d37b65ec97fd1754d53d78a6a24.exe	75
PID 4808 wrote to memory of 3380	4808	648f0d37b65ec97fd1754d53d78a6a24.exe	76
PID 4808 wrote to memory of 3380	4808	648f0d37b65ec97fd1754d53d78a6a24.exe	76
PID 4808 wrote to memory of 3380	4808	648f0d37b65ec97fd1754d53d78a6a24.exe	76
PID 3380 wrote to memory of 1008	3380	648f0d37b65ec97fd1754d53d78a6a24.exe	78
PID 3380 wrote to memory of 1008	3380	648f0d37b65ec97fd1754d53d78a6a24.exe	78
PID 3380 wrote to memory of 1008	3380	648f0d37b65ec97fd1754d53d78a6a24.exe	78
PID 3380 wrote to memory of 1412	3380	648f0d37b65ec97fd1754d53d78a6a24.exe	80
PID 3380 wrote to memory of 1412	3380	648f0d37b65ec97fd1754d53d78a6a24.exe	80
PID 3380 wrote to memory of 1412	3380	648f0d37b65ec97fd1754d53d78a6a24.exe	80
PID 1008 wrote to memory of 2524	1008	updatewin.exe	83
PID 1008 wrote to memory of 2524	1008	updatewin.exe	83
PID 1008 wrote to memory of 2524	1008	updatewin.exe	83
PID 2524 wrote to memory of 2564	2524	cmd.exe	85
PID 2524 wrote to memory of 2564	2524	cmd.exe	85
PID 2524 wrote to memory of 2564	2524	cmd.exe	85
PID 1412 wrote to memory of 3304	1412	5.exe	86
PID 1412 wrote to memory of 3304	1412	5.exe	86
PID 1412 wrote to memory of 3304	1412	5.exe	86
PID 3304 wrote to memory of 2248	3304	cmd.exe	88
PID 3304 wrote to memory of 2248	3304	cmd.exe	88
PID 3304 wrote to memory of 2248	3304	cmd.exe	88
PID 3304 wrote to memory of 3280	3304	cmd.exe	90
PID 3304 wrote to memory of 3280	3304	cmd.exe	90
PID 3304 wrote to memory of 3280	3304	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\648f0d37b65ec97fd1754d53d78a6a24.exe
"C:\Users\Admin\AppData\Local\Temp\648f0d37b65ec97fd1754d53d78a6a24.exe"
1⤵
- Adds Run key to start application
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4808
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\Users\Admin\AppData\Local\22f227d2-1ffb-49e1-ba99-b15cc028309d" /deny *S-1-1-0:(OI)(CI)(DE,DC)
  2⤵
  - Modifies file permissions
  PID:4392
- C:\Users\Admin\AppData\Local\Temp\648f0d37b65ec97fd1754d53d78a6a24.exe
  "C:\Users\Admin\AppData\Local\Temp\648f0d37b65ec97fd1754d53d78a6a24.exe" --Admin IsNotAutoStart IsNotTask
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3380
- - C:\Users\Admin\AppData\Local\45ac5465-3a87-4b3f-b5e8-ccb7e789b331\updatewin.exe
    "C:\Users\Admin\AppData\Local\45ac5465-3a87-4b3f-b5e8-ccb7e789b331\updatewin.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:1008
  - - C:\Windows\SysWOW64\cmd.exe
      /c timeout /t 3 & del /f /q C:\Users\Admin\AppData\Local\45ac5465-3a87-4b3f-b5e8-ccb7e789b331\updatewin.exe
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2524
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 3
        5⤵
        Delays execution with timeout.exe
        
        PID:2564
- - C:\Users\Admin\AppData\Local\45ac5465-3a87-4b3f-b5e8-ccb7e789b331\5.exe
    "C:\Users\Admin\AppData\Local\45ac5465-3a87-4b3f-b5e8-ccb7e789b331\5.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1412
  - - 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\45ac5465-3a87-4b3f-b5e8-ccb7e789b331\5.exe" & del C:\ProgramData\*.dll & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3304
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im 5.exe /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2248
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 6
        5⤵
        Delays execution with timeout.exe
        
        PID:3280

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/3380-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3380-8-0x0000000000DB0000-0x0000000000DB1000-memory.dmp

Filesize
4KB

Download
memory/4808-2-0x0000000000D50000-0x0000000000D51000-memory.dmp

Filesize
4KB

Download
memory/4808-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4808-3-0x0000000000A80000-0x0000000000B9A000-memory.dmp

Filesize
1.1MB

Download