vidar | 0c1571e0f22ecc1c3ed2b80ee90df329d820e287ac0be834aa905726ea96887e

Analysis

max time kernel
137s
max time network
135s
platform
windows10_x64
resource
win10v20210408
submitted
01/08/2021, 12:56

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General

Target
d23f5899352f63e1e45e615ef6526f10.exe
Size 799KB
Sample210801-nfegb2krsa
SHA256 0c1571e0f22ecc1c3ed2b80ee90df329d820e287ac0be834aa905726ea96887e
MD5 d23f5899352f63e1e45e615ef6526f10
SHA1 be86fce35c64c758a6a824fb09e94846b934a54e
SHA512 461799145794457d3e654e02e7733ef426204deb148e3326235928582835fc97383736b07accd76c398fa1c1e56b7145810fc987d31d6062c224feb5e9a8b2cd
MD5 SHA1 SHA512

Score

10^/10

vidar 517 discovery persistence spyware stealer suricata

Malware Config

Extracted

Family

vidar

Version

39.7

Botnet

https://shpak125.tumblr.com/

Attributes

profile_id
517

Signatures

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
suricata
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata
suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload
suricata
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata

Vidar Stealer 5 IoCs

stealer

resource	yara_rule
behavioral2/memory/3980-134-0x0000000002130000-0x00000000021CE000-memory.dmp	family_vidar
behavioral2/memory/2604-135-0x0000000000400000-0x00000000004A1000-memory.dmp	family_vidar
behavioral2/memory/2604-136-0x000000000046B76D-mapping.dmp	family_vidar
behavioral2/memory/2604-142-0x0000000000400000-0x00000000004A1000-memory.dmp	family_vidar
behavioral2/memory/1012-162-0x0000000003250000-0x000000000339A000-memory.dmp	family_vidar

Downloads MZ/PE file

Executes dropped EXE 8 IoCs

pid	Process
3980	build2.exe
3276	build3.exe
2604	build2.exe
3828	build3.exe
1012	mstsca.exe
748	mstsca.exe
3540	mstsca.exe
2204	mstsca.exe

Loads dropped DLL 2 IoCs

pid	Process
2604	build2.exe
2604	build2.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4080	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\\19b4e6ce-973b-48e7-b64e-8bbc7e453007\\d23f5899352f63e1e45e615ef6526f10.exe\" --AutoStart"	d23f5899352f63e1e45e615ef6526f10.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
12	api.2ip.ua
13	api.2ip.ua
21	api.2ip.ua

Suspicious use of SetThreadContext 6 IoCs

description	pid	Process	procid_target
PID 800 set thread context of 3188	800	d23f5899352f63e1e45e615ef6526f10.exe	75
PID 1248 set thread context of 1352	1248	d23f5899352f63e1e45e615ef6526f10.exe	81
PID 3980 set thread context of 2604	3980	build2.exe	85
PID 3276 set thread context of 3828	3276	build3.exe	86
PID 1012 set thread context of 748	1012	mstsca.exe	94
PID 3540 set thread context of 2204	3540	mstsca.exe	98

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

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
3020	schtasks.exe
2284	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1248	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
4024	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	d23f5899352f63e1e45e615ef6526f10.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	d23f5899352f63e1e45e615ef6526f10.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
3188	d23f5899352f63e1e45e615ef6526f10.exe
3188	d23f5899352f63e1e45e615ef6526f10.exe
1352	d23f5899352f63e1e45e615ef6526f10.exe
1352	d23f5899352f63e1e45e615ef6526f10.exe
2604	build2.exe
2604	build2.exe
2604	build2.exe
2604	build2.exe
2604	build2.exe
2604	build2.exe
2604	build2.exe
2604	build2.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4024	taskkill.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 800 wrote to memory of 3188	800	d23f5899352f63e1e45e615ef6526f10.exe	75
PID 800 wrote to memory of 3188	800	d23f5899352f63e1e45e615ef6526f10.exe	75
PID 800 wrote to memory of 3188	800	d23f5899352f63e1e45e615ef6526f10.exe	75
PID 800 wrote to memory of 3188	800	d23f5899352f63e1e45e615ef6526f10.exe	75
PID 800 wrote to memory of 3188	800	d23f5899352f63e1e45e615ef6526f10.exe	75
PID 800 wrote to memory of 3188	800	d23f5899352f63e1e45e615ef6526f10.exe	75
PID 800 wrote to memory of 3188	800	d23f5899352f63e1e45e615ef6526f10.exe	75
PID 800 wrote to memory of 3188	800	d23f5899352f63e1e45e615ef6526f10.exe	75
PID 800 wrote to memory of 3188	800	d23f5899352f63e1e45e615ef6526f10.exe	75
PID 800 wrote to memory of 3188	800	d23f5899352f63e1e45e615ef6526f10.exe	75
PID 3188 wrote to memory of 4080	3188	d23f5899352f63e1e45e615ef6526f10.exe	76
PID 3188 wrote to memory of 4080	3188	d23f5899352f63e1e45e615ef6526f10.exe	76
PID 3188 wrote to memory of 4080	3188	d23f5899352f63e1e45e615ef6526f10.exe	76
PID 3188 wrote to memory of 1248	3188	d23f5899352f63e1e45e615ef6526f10.exe	77
PID 3188 wrote to memory of 1248	3188	d23f5899352f63e1e45e615ef6526f10.exe	77
PID 3188 wrote to memory of 1248	3188	d23f5899352f63e1e45e615ef6526f10.exe	77
PID 1248 wrote to memory of 1352	1248	d23f5899352f63e1e45e615ef6526f10.exe	81
PID 1248 wrote to memory of 1352	1248	d23f5899352f63e1e45e615ef6526f10.exe	81
PID 1248 wrote to memory of 1352	1248	d23f5899352f63e1e45e615ef6526f10.exe	81
PID 1248 wrote to memory of 1352	1248	d23f5899352f63e1e45e615ef6526f10.exe	81
PID 1248 wrote to memory of 1352	1248	d23f5899352f63e1e45e615ef6526f10.exe	81
PID 1248 wrote to memory of 1352	1248	d23f5899352f63e1e45e615ef6526f10.exe	81
PID 1248 wrote to memory of 1352	1248	d23f5899352f63e1e45e615ef6526f10.exe	81
PID 1248 wrote to memory of 1352	1248	d23f5899352f63e1e45e615ef6526f10.exe	81
PID 1248 wrote to memory of 1352	1248	d23f5899352f63e1e45e615ef6526f10.exe	81
PID 1248 wrote to memory of 1352	1248	d23f5899352f63e1e45e615ef6526f10.exe	81
PID 1352 wrote to memory of 3980	1352	d23f5899352f63e1e45e615ef6526f10.exe	82
PID 1352 wrote to memory of 3980	1352	d23f5899352f63e1e45e615ef6526f10.exe	82
PID 1352 wrote to memory of 3980	1352	d23f5899352f63e1e45e615ef6526f10.exe	82
PID 1352 wrote to memory of 3276	1352	d23f5899352f63e1e45e615ef6526f10.exe	84
PID 1352 wrote to memory of 3276	1352	d23f5899352f63e1e45e615ef6526f10.exe	84
PID 1352 wrote to memory of 3276	1352	d23f5899352f63e1e45e615ef6526f10.exe	84
PID 3980 wrote to memory of 2604	3980	build2.exe	85
PID 3980 wrote to memory of 2604	3980	build2.exe	85
PID 3980 wrote to memory of 2604	3980	build2.exe	85
PID 3980 wrote to memory of 2604	3980	build2.exe	85
PID 3980 wrote to memory of 2604	3980	build2.exe	85
PID 3980 wrote to memory of 2604	3980	build2.exe	85
PID 3980 wrote to memory of 2604	3980	build2.exe	85
PID 3980 wrote to memory of 2604	3980	build2.exe	85
PID 3276 wrote to memory of 3828	3276	build3.exe	86
PID 3276 wrote to memory of 3828	3276	build3.exe	86
PID 3276 wrote to memory of 3828	3276	build3.exe	86
PID 3276 wrote to memory of 3828	3276	build3.exe	86
PID 3276 wrote to memory of 3828	3276	build3.exe	86
PID 3276 wrote to memory of 3828	3276	build3.exe	86
PID 3276 wrote to memory of 3828	3276	build3.exe	86
PID 3276 wrote to memory of 3828	3276	build3.exe	86
PID 3276 wrote to memory of 3828	3276	build3.exe	86
PID 3828 wrote to memory of 2284	3828	build3.exe	87
PID 3828 wrote to memory of 2284	3828	build3.exe	87
PID 3828 wrote to memory of 2284	3828	build3.exe	87
PID 2604 wrote to memory of 496	2604	build2.exe	89
PID 2604 wrote to memory of 496	2604	build2.exe	89
PID 2604 wrote to memory of 496	2604	build2.exe	89
PID 496 wrote to memory of 4024	496	cmd.exe	91
PID 496 wrote to memory of 4024	496	cmd.exe	91
PID 496 wrote to memory of 4024	496	cmd.exe	91
PID 496 wrote to memory of 1248	496	cmd.exe	92
PID 496 wrote to memory of 1248	496	cmd.exe	92
PID 496 wrote to memory of 1248	496	cmd.exe	92
PID 1012 wrote to memory of 748	1012	mstsca.exe	94
PID 1012 wrote to memory of 748	1012	mstsca.exe	94
PID 1012 wrote to memory of 748	1012	mstsca.exe	94

C:\Users\Admin\AppData\Local\Temp\d23f5899352f63e1e45e615ef6526f10.exe
"C:\Users\Admin\AppData\Local\Temp\d23f5899352f63e1e45e615ef6526f10.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:800
- C:\Users\Admin\AppData\Local\Temp\d23f5899352f63e1e45e615ef6526f10.exe
  "C:\Users\Admin\AppData\Local\Temp\d23f5899352f63e1e45e615ef6526f10.exe"
  2⤵
  - Adds Run key to start application
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3188
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\19b4e6ce-973b-48e7-b64e-8bbc7e453007" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:4080
- - C:\Users\Admin\AppData\Local\Temp\d23f5899352f63e1e45e615ef6526f10.exe
    "C:\Users\Admin\AppData\Local\Temp\d23f5899352f63e1e45e615ef6526f10.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1248
  - - C:\Users\Admin\AppData\Local\Temp\d23f5899352f63e1e45e615ef6526f10.exe
      "C:\Users\Admin\AppData\Local\Temp\d23f5899352f63e1e45e615ef6526f10.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:1352
    - - C:\Users\Admin\AppData\Local\4245ad2c-2182-4cc0-b99e-fc339619ea83\build2.exe
        
        "C:\Users\Admin\AppData\Local\4245ad2c-2182-4cc0-b99e-fc339619ea83\build2.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:3980
      - C:\Users\Admin\AppData\Local\4245ad2c-2182-4cc0-b99e-fc339619ea83\build2.exe
        
        "C:\Users\Admin\AppData\Local\4245ad2c-2182-4cc0-b99e-fc339619ea83\build2.exe"
        6⤵
        Executes dropped EXE
        Loads dropped DLL
        Checks processor information in registry
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:2604
        
        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\4245ad2c-2182-4cc0-b99e-fc339619ea83\build2.exe" & del C:\ProgramData\*.dll & exit
        7⤵
        Suspicious use of WriteProcessMemory
        
        PID:496
        
        C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im build2.exe /f
        8⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4024
        
        C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 6
        8⤵
        Delays execution with timeout.exe
        
        PID:1248
    - - C:\Users\Admin\AppData\Local\4245ad2c-2182-4cc0-b99e-fc339619ea83\build3.exe
        
        "C:\Users\Admin\AppData\Local\4245ad2c-2182-4cc0-b99e-fc339619ea83\build3.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:3276
      - C:\Users\Admin\AppData\Local\4245ad2c-2182-4cc0-b99e-fc339619ea83\build3.exe
        
        "C:\Users\Admin\AppData\Local\4245ad2c-2182-4cc0-b99e-fc339619ea83\build3.exe"
        6⤵
        Executes dropped EXE
        Suspicious use of WriteProcessMemory
        
        PID:3828
        
        C:\Windows\SysWOW64\schtasks.exe
        
        /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
        7⤵
        Creates scheduled task(s)
        
        PID:2284

C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1012
- C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
  C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
  2⤵
  - Executes dropped EXE
  PID:748
- - C:\Windows\SysWOW64\schtasks.exe
    /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
    3⤵
    - Creates scheduled task(s)
    PID:3020

C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
PID:3540
- C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
  C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
  2⤵
  - Executes dropped EXE
  PID:2204

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

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

Replay Monitor

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Downloads

memory/800-116-0x0000000003310000-0x000000000342B000-memory.dmp

Download

memory/1012-162-0x0000000003250000-0x000000000339A000-memory.dmp

Download

memory/1352-127-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/2604-135-0x0000000000400000-0x00000000004A1000-memory.dmp

Download

memory/2604-142-0x0000000000400000-0x00000000004A1000-memory.dmp

Download

memory/3188-117-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/3188-114-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/3276-143-0x0000000003250000-0x000000000339A000-memory.dmp

Download

memory/3540-167-0x0000000003480000-0x0000000003484000-memory.dmp

Download

memory/3828-138-0x0000000000400000-0x0000000000406000-memory.dmp

Download

memory/3828-144-0x0000000000400000-0x0000000000406000-memory.dmp

Download

memory/3980-134-0x0000000002130000-0x00000000021CE000-memory.dmp

Download