da9a898aeba9ed3dbf4d70fd12a8c886e1a7952c9bcb05952f87d9113c9df84b

Analysis

max time kernel
90s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
20/01/2023, 02:29

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General

Target
01b8e515d67bd370e13b5bc1d2526871.exe
Size 3.0MB
Sample230120-cyldkadd2v
SHA256 da9a898aeba9ed3dbf4d70fd12a8c886e1a7952c9bcb05952f87d9113c9df84b
MD5 01b8e515d67bd370e13b5bc1d2526871
SHA1 3d0677292ea0d8c0972938ae9c2d222f903021b0
SHA512 48e1a98d945862172ead211ae879708aaa12cc7c598eebe43479fda11328229122e5a8a480bf90d1504f0567b9cab0764e0a2701e9c6415f380cfe0d0e66bcfe
SSDEEP 49152:VYBD2mrPyuiB8j3NmIMnw2oC6ZtyrrmYl1/H3OkWbtf7KAgN1t:VCTC+pQw2kZar5/HYZ7KAkD
MD5 SHA1 SHA512 SSDEEP

Score

9^/10

evasion spyware stealer themida trojan

Malware Config

Signatures

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	01b8e515d67bd370e13b5bc1d2526871.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	Avast security.exe

Executes dropped EXE 1 IoCs

pid	Process
2816	Avast security.exe

Checks BIOS information in registry 2 TTPs 4 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	01b8e515d67bd370e13b5bc1d2526871.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	01b8e515d67bd370e13b5bc1d2526871.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Avast security.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Avast security.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	01b8e515d67bd370e13b5bc1d2526871.exe
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	Avast security.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 4 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/1316-135-0x0000000000C70000-0x00000000014C8000-memory.dmp	themida
behavioral2/memory/1316-140-0x0000000000C70000-0x00000000014C8000-memory.dmp	themida
behavioral2/files/0x0001000000022e6a-143.dat	themida
behavioral2/memory/2816-147-0x00000000008A0000-0x00000000010F8000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	01b8e515d67bd370e13b5bc1d2526871.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Avast security.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1316	01b8e515d67bd370e13b5bc1d2526871.exe
2816	Avast security.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1316	01b8e515d67bd370e13b5bc1d2526871.exe
1316	01b8e515d67bd370e13b5bc1d2526871.exe
1316	01b8e515d67bd370e13b5bc1d2526871.exe
2816	Avast security.exe
2816	Avast security.exe
2816	Avast security.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1316	01b8e515d67bd370e13b5bc1d2526871.exe
Token: SeDebugPrivilege	2816	Avast security.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1316 wrote to memory of 3784	1316	01b8e515d67bd370e13b5bc1d2526871.exe	86
PID 1316 wrote to memory of 3784	1316	01b8e515d67bd370e13b5bc1d2526871.exe	86
PID 1316 wrote to memory of 3784	1316	01b8e515d67bd370e13b5bc1d2526871.exe	86
PID 3784 wrote to memory of 2816	3784	cmd.exe	88
PID 3784 wrote to memory of 2816	3784	cmd.exe	88
PID 3784 wrote to memory of 2816	3784	cmd.exe	88
PID 2816 wrote to memory of 2420	2816	Avast security.exe	90
PID 2816 wrote to memory of 2420	2816	Avast security.exe	90
PID 2816 wrote to memory of 2420	2816	Avast security.exe	90
PID 2420 wrote to memory of 4988	2420	cmd.exe	92
PID 2420 wrote to memory of 4988	2420	cmd.exe	92
PID 2420 wrote to memory of 4988	2420	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\01b8e515d67bd370e13b5bc1d2526871.exe
"C:\Users\Admin\AppData\Local\Temp\01b8e515d67bd370e13b5bc1d2526871.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1316
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Mozilla\Avast security.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3784
- - C:\Users\Admin\AppData\Roaming\Mozilla\Avast security.exe
    "C:\Users\Admin\AppData\Roaming\Mozilla\Avast security.exe"
    3⤵
    - Identifies VirtualBox via ACPI registry values (likely anti-VM)
    - Executes dropped EXE
    - Checks BIOS information in registry
    - Checks computer location settings
    - Checks whether UAC is enabled
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2816
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c @echo off & echo const TriggerTypeLogon=9 : const ActionTypeExecutable=0 : const TASK_LOGON_INTERACTIVE_TOKEN=3 : const createOrUpdateTask=6 : Set service=CreateObject("Schedule.Service") : call service.Connect() : Dim rootFolder : Set rootFolder=service.GetFolder("") : Dim taskDefinition : Set taskDefinition=service.NewTask(0) : Dim regInfo : Set regInfo=taskDefinition.RegistrationInfo : regInfo.Author="Avast corporation" : regInfo.Description="Avast security is a software application that safeguards a system from malware. It was an anti-spyware program built to fight unauthorized access and protect Windows computers from unwanted software." : Dim settings : Set settings=taskDefinition.Settings : settings.StartWhenAvailable=True : settings.ExecutionTimeLimit="PT0S" : settings.AllowHardTerminate=False : settings.IdleSettings.StopOnIdleEnd=False : settings.DisallowStartIfOnBatteries=False : settings.StopIfGoingOnBatteries=False : Dim triggers : Set triggers=taskDefinition.Triggers : Dim trigger : Set trigger=triggers.Create(TriggerTypeLogon) : userId=CreateObject("WScript.Shell").ExpandEnvironmentStrings("%USERNAME%") : trigger.Id="LogonTriggerId" : trigger.UserId=userId : Dim Action : Set Action=taskDefinition.Actions.Create(ActionTypeExecutable) : Action.Path="C:\Users\Admin\AppData\Roaming\Mozilla\Avast security.exe" : taskDefinition.Principal.UserId=userId : taskDefinition.Principal.LogonType=TASK_LOGON_INTERACTIVE_TOKEN : call rootFolder.RegisterTaskDefinition("Avast security", taskDefinition, createOrUpdateTask, Empty, Empty, TASK_LOGON_INTERACTIVE_TOKEN) > "C:\Users\Admin\AppData\Local\Temp\tmpF38C.vbs" & cscript //nologo "C:\Users\Admin\AppData\Local\Temp\tmpF38C.vbs" & del /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\tmpF38C.vbs" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2420
    - - C:\Windows\SysWOW64\cscript.exe
        
        cscript //nologo "C:\Users\Admin\AppData\Local\Temp\tmpF38C.vbs"
        5⤵
        
        PID:4988

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

Replay Monitor

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Downloads

tmpF38C.vbs

Path C:\Users\Admin\AppData\Local\Temp\tmpF38C.vbs
Size 1KB
SHA256 685acebd43141ce3c81da908dc0c337438f6ffbdaf888cc854d8fd6583a3bbda
MD5 cf2855a6fcddc15aa1e22f4c582f9648
SHA1 18a03506f96511a31c2f212976015196e2965c11
SHA512 b1af0b9936eaa3642070ce5dd00db3e617ce72ac46557b0663a9883eb1c8de8a58a4a94892fed946e3b210d0a533ed4d25bfe505cb8672e0ad828f6297c348ab
MD5 SHA1 SHA512

Submit Download

Avast security.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\Avast security.exe
Size 3.0MB
SHA256 da9a898aeba9ed3dbf4d70fd12a8c886e1a7952c9bcb05952f87d9113c9df84b
MD5 01b8e515d67bd370e13b5bc1d2526871
SHA1 3d0677292ea0d8c0972938ae9c2d222f903021b0
SHA512 48e1a98d945862172ead211ae879708aaa12cc7c598eebe43479fda11328229122e5a8a480bf90d1504f0567b9cab0764e0a2701e9c6415f380cfe0d0e66bcfe
SSDEEP 49152:VYBD2mrPyuiB8j3NmIMnw2oC6ZtyrrmYl1/H3OkWbtf7KAgN1t:VCTC+pQw2kZar5/HYZ7KAkD
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1316-132-0x0000000000C70000-0x00000000014C8000-memory.dmp

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memory/1316-135-0x0000000000C70000-0x00000000014C8000-memory.dmp

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memory/1316-136-0x0000000000C70000-0x00000000014C8000-memory.dmp

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memory/1316-137-0x00000000055E0000-0x0000000005646000-memory.dmp

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memory/1316-138-0x00000000777C0000-0x0000000077963000-memory.dmp

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memory/1316-140-0x0000000000C70000-0x00000000014C8000-memory.dmp

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memory/1316-141-0x00000000777C0000-0x0000000077963000-memory.dmp

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memory/2816-144-0x00000000008A0000-0x00000000010F8000-memory.dmp

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memory/2816-147-0x00000000008A0000-0x00000000010F8000-memory.dmp

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memory/2816-148-0x00000000777C0000-0x0000000077963000-memory.dmp

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memory/2816-152-0x0000000006120000-0x00000000061BC000-memory.dmp

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memory/2816-154-0x0000000005B10000-0x0000000005B22000-memory.dmp

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memory/2816-155-0x0000000006B80000-0x0000000006BBC000-memory.dmp

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memory/2816-156-0x00000000008A0000-0x00000000010F8000-memory.dmp

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memory/2816-157-0x00000000777C0000-0x0000000077963000-memory.dmp

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