vidar | efd055ee7d3d09c7211dd6aceef64f42ff62d01edf0105d06d77d0b92411bedc

Analysis

max time kernel
64s
max time network
127s
platform
windows10_x64
resource
win10v20210410
submitted
22/07/2021, 08:02

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General

Target
38911964dcd075508c459254ad27517d.exe
Size 771KB
Sample210722-qf5cxtmqs2
SHA256 efd055ee7d3d09c7211dd6aceef64f42ff62d01edf0105d06d77d0b92411bedc
MD5 38911964dcd075508c459254ad27517d
SHA1 22c468c8d5efd3a5950ff1b28dbfa47b0a42f842
SHA512 8e5cce82d2e222bf1fef8027533a17564041206d29611192cfe65c2a194a2bf8aa0be4d9414672a4361b43ec091d070267df6d806b932d96a9c2a6e292740971
MD5 SHA1 SHA512

Score

10^/10

vidar 517 discovery persistence spyware stealer

Malware Config

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/3584-131-0x0000000000400000-0x00000000004A1000-memory.dmp	family_vidar
behavioral2/memory/3584-132-0x000000000046B76D-mapping.dmp	family_vidar
behavioral2/memory/4020-134-0x0000000002680000-0x000000000271E000-memory.dmp	family_vidar
behavioral2/memory/3584-135-0x0000000000400000-0x00000000004A1000-memory.dmp	family_vidar

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
4020	build2.exe
3584	build2.exe

Loads dropped DLL 2 IoCs

pid	Process
3584	build2.exe
3584	build2.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2492	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\\0096d02b-a9a4-4c74-80f7-3069e7d6af57\\38911964dcd075508c459254ad27517d.exe\" --AutoStart"	38911964dcd075508c459254ad27517d.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
20	api.2ip.ua

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4056 set thread context of 4080	4056	38911964dcd075508c459254ad27517d.exe	76
PID 2100 set thread context of 2308	2100	38911964dcd075508c459254ad27517d.exe	82
PID 4020 set thread context of 3584	4020	build2.exe	85

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
640	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2432	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	38911964dcd075508c459254ad27517d.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	38911964dcd075508c459254ad27517d.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
4080	38911964dcd075508c459254ad27517d.exe
4080	38911964dcd075508c459254ad27517d.exe
2308	38911964dcd075508c459254ad27517d.exe
2308	38911964dcd075508c459254ad27517d.exe
3584	build2.exe
3584	build2.exe
3584	build2.exe
3584	build2.exe
3584	build2.exe
3584	build2.exe
3584	build2.exe
3584	build2.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2432	taskkill.exe

Suspicious use of WriteProcessMemory 46 IoCs

description	pid	Process	procid_target
PID 4056 wrote to memory of 4080	4056	38911964dcd075508c459254ad27517d.exe	76
PID 4056 wrote to memory of 4080	4056	38911964dcd075508c459254ad27517d.exe	76
PID 4056 wrote to memory of 4080	4056	38911964dcd075508c459254ad27517d.exe	76
PID 4056 wrote to memory of 4080	4056	38911964dcd075508c459254ad27517d.exe	76
PID 4056 wrote to memory of 4080	4056	38911964dcd075508c459254ad27517d.exe	76
PID 4056 wrote to memory of 4080	4056	38911964dcd075508c459254ad27517d.exe	76
PID 4056 wrote to memory of 4080	4056	38911964dcd075508c459254ad27517d.exe	76
PID 4056 wrote to memory of 4080	4056	38911964dcd075508c459254ad27517d.exe	76
PID 4056 wrote to memory of 4080	4056	38911964dcd075508c459254ad27517d.exe	76
PID 4056 wrote to memory of 4080	4056	38911964dcd075508c459254ad27517d.exe	76
PID 4080 wrote to memory of 2492	4080	38911964dcd075508c459254ad27517d.exe	77
PID 4080 wrote to memory of 2492	4080	38911964dcd075508c459254ad27517d.exe	77
PID 4080 wrote to memory of 2492	4080	38911964dcd075508c459254ad27517d.exe	77
PID 4080 wrote to memory of 2100	4080	38911964dcd075508c459254ad27517d.exe	78
PID 4080 wrote to memory of 2100	4080	38911964dcd075508c459254ad27517d.exe	78
PID 4080 wrote to memory of 2100	4080	38911964dcd075508c459254ad27517d.exe	78
PID 2100 wrote to memory of 2308	2100	38911964dcd075508c459254ad27517d.exe	82
PID 2100 wrote to memory of 2308	2100	38911964dcd075508c459254ad27517d.exe	82
PID 2100 wrote to memory of 2308	2100	38911964dcd075508c459254ad27517d.exe	82
PID 2100 wrote to memory of 2308	2100	38911964dcd075508c459254ad27517d.exe	82
PID 2100 wrote to memory of 2308	2100	38911964dcd075508c459254ad27517d.exe	82
PID 2100 wrote to memory of 2308	2100	38911964dcd075508c459254ad27517d.exe	82
PID 2100 wrote to memory of 2308	2100	38911964dcd075508c459254ad27517d.exe	82
PID 2100 wrote to memory of 2308	2100	38911964dcd075508c459254ad27517d.exe	82
PID 2100 wrote to memory of 2308	2100	38911964dcd075508c459254ad27517d.exe	82
PID 2100 wrote to memory of 2308	2100	38911964dcd075508c459254ad27517d.exe	82
PID 2308 wrote to memory of 4020	2308	38911964dcd075508c459254ad27517d.exe	84
PID 2308 wrote to memory of 4020	2308	38911964dcd075508c459254ad27517d.exe	84
PID 2308 wrote to memory of 4020	2308	38911964dcd075508c459254ad27517d.exe	84
PID 4020 wrote to memory of 3584	4020	build2.exe	85
PID 4020 wrote to memory of 3584	4020	build2.exe	85
PID 4020 wrote to memory of 3584	4020	build2.exe	85
PID 4020 wrote to memory of 3584	4020	build2.exe	85
PID 4020 wrote to memory of 3584	4020	build2.exe	85
PID 4020 wrote to memory of 3584	4020	build2.exe	85
PID 4020 wrote to memory of 3584	4020	build2.exe	85
PID 4020 wrote to memory of 3584	4020	build2.exe	85
PID 3584 wrote to memory of 4048	3584	build2.exe	86
PID 3584 wrote to memory of 4048	3584	build2.exe	86
PID 3584 wrote to memory of 4048	3584	build2.exe	86
PID 4048 wrote to memory of 2432	4048	cmd.exe	88
PID 4048 wrote to memory of 2432	4048	cmd.exe	88
PID 4048 wrote to memory of 2432	4048	cmd.exe	88
PID 4048 wrote to memory of 640	4048	cmd.exe	89
PID 4048 wrote to memory of 640	4048	cmd.exe	89
PID 4048 wrote to memory of 640	4048	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\38911964dcd075508c459254ad27517d.exe
"C:\Users\Admin\AppData\Local\Temp\38911964dcd075508c459254ad27517d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4056
- C:\Users\Admin\AppData\Local\Temp\38911964dcd075508c459254ad27517d.exe
  "C:\Users\Admin\AppData\Local\Temp\38911964dcd075508c459254ad27517d.exe"
  2⤵
  - Adds Run key to start application
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4080
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\0096d02b-a9a4-4c74-80f7-3069e7d6af57" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2492
- - C:\Users\Admin\AppData\Local\Temp\38911964dcd075508c459254ad27517d.exe
    "C:\Users\Admin\AppData\Local\Temp\38911964dcd075508c459254ad27517d.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2100
  - - C:\Users\Admin\AppData\Local\Temp\38911964dcd075508c459254ad27517d.exe
      "C:\Users\Admin\AppData\Local\Temp\38911964dcd075508c459254ad27517d.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:2308
    - - C:\Users\Admin\AppData\Local\2543ffe5-5c74-40b1-8570-41d26ef880ad\build2.exe
        
        "C:\Users\Admin\AppData\Local\2543ffe5-5c74-40b1-8570-41d26ef880ad\build2.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:4020
      - C:\Users\Admin\AppData\Local\2543ffe5-5c74-40b1-8570-41d26ef880ad\build2.exe
        
        "C:\Users\Admin\AppData\Local\2543ffe5-5c74-40b1-8570-41d26ef880ad\build2.exe"
        6⤵
        Executes dropped EXE
        Loads dropped DLL
        Checks processor information in registry
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:3584
        
        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\2543ffe5-5c74-40b1-8570-41d26ef880ad\build2.exe" & del C:\ProgramData\*.dll & exit
        7⤵
        Suspicious use of WriteProcessMemory
        
        PID:4048
        
        C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im build2.exe /f
        8⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2432
        
        C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 6
        8⤵
        Delays execution with timeout.exe
        
        PID:640

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/2308-127-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/3584-135-0x0000000000400000-0x00000000004A1000-memory.dmp

Download

memory/3584-131-0x0000000000400000-0x00000000004A1000-memory.dmp

Download

memory/4020-134-0x0000000002680000-0x000000000271E000-memory.dmp

Download

memory/4056-117-0x0000000004B60000-0x0000000004C7B000-memory.dmp

Download

memory/4080-114-0x0000000000400000-0x0000000000537000-memory.dmp

Download

memory/4080-118-0x0000000000400000-0x0000000000537000-memory.dmp

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