vidar | b0bc5a3dae0127da8f7743df8dc4014e9ba08c5a29928448aed8764242050da2

Analysis

max time kernel
72s
max time network
142s
platform
windows10_x64
resource
win10v20210408
submitted
10/07/2021, 05:13

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General

Target
2e666d262882b4262701b63378d44cb2.exe
Size 4.5MB
Sample210710-9nlgaebyrn
SHA256 b0bc5a3dae0127da8f7743df8dc4014e9ba08c5a29928448aed8764242050da2
MD5 2e666d262882b4262701b63378d44cb2
SHA1 f62193a310279734e0a842b051d41d392f9ab908
SHA512 5cbe91e21fa234245669a1e13478df95728c225e5e627cc77e42d6eed373e0ea94b61e4c3f1e1345923999e6e622e474134873f76cf37e87944360c4282d7a1e
MD5 SHA1 SHA512

Score

10^/10

vidar discovery evasion spyware stealer themida trojan

Malware Config

Signatures

Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Downloads MZ/PE file

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	2e666d262882b4262701b63378d44cb2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	2e666d262882b4262701b63378d44cb2.exe

Loads dropped DLL 2 IoCs

pid	Process
632	2e666d262882b4262701b63378d44cb2.exe
632	2e666d262882b4262701b63378d44cb2.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

Themida packer 1 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/632-114-0x0000000000400000-0x0000000000F43000-memory.dmp	themida

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
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

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	2e666d262882b4262701b63378d44cb2.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
632	2e666d262882b4262701b63378d44cb2.exe

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	2e666d262882b4262701b63378d44cb2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	2e666d262882b4262701b63378d44cb2.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
684	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
4092	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	2e666d262882b4262701b63378d44cb2.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	2e666d262882b4262701b63378d44cb2.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
632	2e666d262882b4262701b63378d44cb2.exe
632	2e666d262882b4262701b63378d44cb2.exe
632	2e666d262882b4262701b63378d44cb2.exe
632	2e666d262882b4262701b63378d44cb2.exe
632	2e666d262882b4262701b63378d44cb2.exe
632	2e666d262882b4262701b63378d44cb2.exe
632	2e666d262882b4262701b63378d44cb2.exe
632	2e666d262882b4262701b63378d44cb2.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4092	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 632 wrote to memory of 1156	632	2e666d262882b4262701b63378d44cb2.exe	78
PID 632 wrote to memory of 1156	632	2e666d262882b4262701b63378d44cb2.exe	78
PID 632 wrote to memory of 1156	632	2e666d262882b4262701b63378d44cb2.exe	78
PID 1156 wrote to memory of 4092	1156	cmd.exe	80
PID 1156 wrote to memory of 4092	1156	cmd.exe	80
PID 1156 wrote to memory of 4092	1156	cmd.exe	80
PID 1156 wrote to memory of 684	1156	cmd.exe	83
PID 1156 wrote to memory of 684	1156	cmd.exe	83
PID 1156 wrote to memory of 684	1156	cmd.exe	83

C:\Users\Admin\AppData\Local\Temp\2e666d262882b4262701b63378d44cb2.exe
"C:\Users\Admin\AppData\Local\Temp\2e666d262882b4262701b63378d44cb2.exe"
1⤵
- Checks BIOS information in registry
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:632
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im 2e666d262882b4262701b63378d44cb2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\2e666d262882b4262701b63378d44cb2.exe" & del C:\ProgramData\*.dll & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1156
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im 2e666d262882b4262701b63378d44cb2.exe /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4092
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 6
    3⤵
    - Delays execution with timeout.exe
    PID:684

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Install Root Certificate

T1130

Modify Registry

T1112

Virtualization/Sandbox Evasion

T1497

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/632-114-0x0000000000400000-0x0000000000F43000-memory.dmp

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memory/632-116-0x00000000779F0000-0x0000000077B7E000-memory.dmp

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memory/632-115-0x0000000000401000-0x0000000000483000-memory.dmp

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