vidar | 41b381e462f4108957fbab888701dfb9e605621507f8dd2d3f71a32b429c5f0c

Analysis

max time kernel
133s
max time network
301s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
23-09-2024 05:03

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General

Target

41b381e462f4108957fbab888701dfb9e605621507f8dd2d3f71a32b429c5f0c.exe
Size

292KB
MD5

0c4b826cab211945649ac4bbb0c48c6b
SHA1

fe0132f85b63833f55a41651fcc0f32c1c96124d
SHA256

41b381e462f4108957fbab888701dfb9e605621507f8dd2d3f71a32b429c5f0c
SHA512

6e4ea6a514002c61cadfea41ae6aa9e81178570dbae5f78b79e95f654dc6c7716a8f98b812c805ad45423f0e657fab260492e46b2e6bb45d25520d933dc27363
SSDEEP

6144:D8zag1zxFKmMqtXpA8dI41MwJckA3/l6ah4LXeofOdLBhShSpk+JEO:OjNxjXrX1z1845DdfCLBxZEO

Score

10^/10

vidar credential_access discovery spyware stealer

Malware Config

Extracted

Family

vidar

https://t.me/edm0d

https://steamcommunity.com/profiles/76561199768374681

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36 OPR/110.0.0.0

Signatures

Detect Vidar Stealer 11 IoCs

stealer

resource	yara_rule
behavioral2/memory/1464-9-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/1464-7-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/1464-4-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/1464-28-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/1464-29-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/1464-45-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/1464-46-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/1464-72-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/1464-73-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/1464-80-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/1464-81-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1576	KKFCFBKFCF.exe

Loads dropped DLL 2 IoCs

pid	Process
1464	RegAsm.exe
1464	RegAsm.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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
T1552.001
Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
credential_access stealer

Credentials In Files
T1552.001
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001
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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4188 set thread context of 1464	4188	41b381e462f4108957fbab888701dfb9e605621507f8dd2d3f71a32b429c5f0c.exe	75
PID 1576 set thread context of 4488	1576	KKFCFBKFCF.exe	80

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1036	4488	WerFault.exe	80

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	41b381e462f4108957fbab888701dfb9e605621507f8dd2d3f71a32b429c5f0c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	KKFCFBKFCF.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3772	timeout.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1464	RegAsm.exe
1464	RegAsm.exe
1464	RegAsm.exe
1464	RegAsm.exe
1464	RegAsm.exe
1464	RegAsm.exe
1464	RegAsm.exe
1464	RegAsm.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 4188 wrote to memory of 1464	4188	41b381e462f4108957fbab888701dfb9e605621507f8dd2d3f71a32b429c5f0c.exe	75
PID 4188 wrote to memory of 1464	4188	41b381e462f4108957fbab888701dfb9e605621507f8dd2d3f71a32b429c5f0c.exe	75
PID 4188 wrote to memory of 1464	4188	41b381e462f4108957fbab888701dfb9e605621507f8dd2d3f71a32b429c5f0c.exe	75
PID 4188 wrote to memory of 1464	4188	41b381e462f4108957fbab888701dfb9e605621507f8dd2d3f71a32b429c5f0c.exe	75
PID 4188 wrote to memory of 1464	4188	41b381e462f4108957fbab888701dfb9e605621507f8dd2d3f71a32b429c5f0c.exe	75
PID 4188 wrote to memory of 1464	4188	41b381e462f4108957fbab888701dfb9e605621507f8dd2d3f71a32b429c5f0c.exe	75
PID 4188 wrote to memory of 1464	4188	41b381e462f4108957fbab888701dfb9e605621507f8dd2d3f71a32b429c5f0c.exe	75
PID 4188 wrote to memory of 1464	4188	41b381e462f4108957fbab888701dfb9e605621507f8dd2d3f71a32b429c5f0c.exe	75
PID 4188 wrote to memory of 1464	4188	41b381e462f4108957fbab888701dfb9e605621507f8dd2d3f71a32b429c5f0c.exe	75
PID 4188 wrote to memory of 1464	4188	41b381e462f4108957fbab888701dfb9e605621507f8dd2d3f71a32b429c5f0c.exe	75
PID 1464 wrote to memory of 1576	1464	RegAsm.exe	77
PID 1464 wrote to memory of 1576	1464	RegAsm.exe	77
PID 1464 wrote to memory of 1576	1464	RegAsm.exe	77
PID 1576 wrote to memory of 4488	1576	KKFCFBKFCF.exe	80
PID 1576 wrote to memory of 4488	1576	KKFCFBKFCF.exe	80
PID 1576 wrote to memory of 4488	1576	KKFCFBKFCF.exe	80
PID 1576 wrote to memory of 4488	1576	KKFCFBKFCF.exe	80
PID 1576 wrote to memory of 4488	1576	KKFCFBKFCF.exe	80
PID 1576 wrote to memory of 4488	1576	KKFCFBKFCF.exe	80
PID 1576 wrote to memory of 4488	1576	KKFCFBKFCF.exe	80
PID 1576 wrote to memory of 4488	1576	KKFCFBKFCF.exe	80
PID 1576 wrote to memory of 4488	1576	KKFCFBKFCF.exe	80
PID 1464 wrote to memory of 4764	1464	RegAsm.exe	83
PID 1464 wrote to memory of 4764	1464	RegAsm.exe	83
PID 1464 wrote to memory of 4764	1464	RegAsm.exe	83
PID 4764 wrote to memory of 3772	4764	cmd.exe	85
PID 4764 wrote to memory of 3772	4764	cmd.exe	85
PID 4764 wrote to memory of 3772	4764	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\41b381e462f4108957fbab888701dfb9e605621507f8dd2d3f71a32b429c5f0c.exe
"C:\Users\Admin\AppData\Local\Temp\41b381e462f4108957fbab888701dfb9e605621507f8dd2d3f71a32b429c5f0c.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4188
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1464
- - C:\ProgramData\KKFCFBKFCF.exe
    "C:\ProgramData\KKFCFBKFCF.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1576
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      4⤵
      System Location Discovery: System Language Discovery
      PID:4488
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4488 -s 584
        5⤵
        Program crash
        
        PID:1036
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\BKFHCGIDBAAF" & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4764
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:3772

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Browser Information Discovery

T1217

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\KKFCFBKFCF.exe

Filesize
381KB

MD5
f5a1956973dce107d4c0b6267ce88870

SHA1
79a19513d7c9cff939f2881c4172a05dbaef735b

SHA256
7b794c5bdb820791f0359da90a9a4f258412b8feef9c6e6a0411f6aead9d3a04

SHA512
f42180c75c0ae8dc083c6fff98a66c0d875fadb400d7945816ea330a54777632a3a7752d3e78b90e45f58ed3d04d6708b1dcea51d82711356e6d14e405a7c579

Download Submit
\ProgramData\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
\ProgramData\nss3.dll

Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
memory/1464-4-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/1464-72-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/1464-81-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/1464-7-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/1464-80-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/1464-28-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/1464-29-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/1464-30-0x0000000020020000-0x000000002027F000-memory.dmp

Filesize
2.4MB

Download
memory/1464-45-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/1464-46-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/1464-73-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/1464-9-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/1576-89-0x000000007131E000-0x000000007131F000-memory.dmp

Filesize
4KB

Download
memory/1576-102-0x0000000071310000-0x00000000719FE000-memory.dmp

Filesize
6.9MB

Download
memory/1576-99-0x0000000071310000-0x00000000719FE000-memory.dmp

Filesize
6.9MB

Download
memory/1576-91-0x0000000071310000-0x00000000719FE000-memory.dmp

Filesize
6.9MB

Download
memory/1576-90-0x0000000000440000-0x00000000004A0000-memory.dmp

Filesize
384KB

Download
memory/4188-0-0x000000007371E000-0x000000007371F000-memory.dmp

Filesize
4KB

Download
memory/4188-1-0x0000000000F10000-0x0000000000F5A000-memory.dmp

Filesize
296KB

Download
memory/4188-13-0x0000000073710000-0x0000000073DFE000-memory.dmp

Filesize
6.9MB

Download
memory/4188-2-0x0000000073710000-0x0000000073DFE000-memory.dmp

Filesize
6.9MB

Download
memory/4188-54-0x0000000073710000-0x0000000073DFE000-memory.dmp

Filesize
6.9MB

Download
memory/4188-12-0x0000000073710000-0x0000000073DFE000-memory.dmp

Filesize
6.9MB

Download
memory/4488-94-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/4488-100-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/4488-97-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download