a7d8fad69caf6f20b0e5d0dc32a68b382b6100baf5ca7895ff98f1146fb6a58a

Analysis

max time kernel
133s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
21/08/2024, 17:28

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General

Target

elfbot.dll
Size

1.4MB
MD5

9b948e02a141517d50a5328bda57e965
SHA1

262eec74677e50e85952fd7e0a256adc64db431e
SHA256

eb84edb1b813e5b433607fa3ea4a4c344059fcb099b2380976879ddab08408b6
SHA512

03418fbaac748f6e8053c56610a653601209eafb6d1273b43f340afb6f7b0347dbd95ff4790df76394dba9d96ae273b0f58a22669ea4a692dbe83eafed610af5
SSDEEP

24576:vi0Tf1DxMVVvmdrjM+TrQRlUsh5SEjPtA8JP9WVoAgYxcZ6mdL:vvMVYBM+TsfUI1d9gorYhml

Score

7^/10

discovery

Malware Config

Signatures

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	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	rundll32.exe

System Location Discovery: System Language Discovery 1 TTPs 1 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	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3F97D07F-1A7E-1F74-4259-375779F76D41}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3F97D07F-1A7E-1F74-4259-375779F76D41}\InprocServer32\ = "%CommonProgramFiles%\\System\\wab32.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3F97D07F-1A7E-1F74-4259-375779F76D41}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3F97D07F-1A7E-1F74-4259-375779F76D41}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3F97D07F-1A7E-1F74-4259-375779F76D41}\ = "CLSID_ContactUserAccountChangeCallback"	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: 33	3736	rundll32.exe
Token: SeIncBasePriorityPrivilege	3736	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3608 wrote to memory of 3736	3608	rundll32.exe	83
PID 3608 wrote to memory of 3736	3608	rundll32.exe	83
PID 3608 wrote to memory of 3736	3608	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\elfbot.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3608
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\elfbot.dll,#1
  2⤵
  - Checks BIOS information in registry
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  PID:3736

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3736-0-0x0000000002400000-0x0000000002504000-memory.dmp

Filesize
1.0MB

Download
memory/3736-6-0x0000000002400000-0x0000000002504000-memory.dmp

Filesize
1.0MB

Download
memory/3736-9-0x0000000010000000-0x000000001047C000-memory.dmp

Filesize
4.5MB

Download
memory/3736-11-0x0000000002710000-0x0000000002730000-memory.dmp

Filesize
128KB

Download
memory/3736-12-0x0000000010000000-0x000000001047C000-memory.dmp

Filesize
4.5MB

Download
memory/3736-13-0x0000000002400000-0x0000000002504000-memory.dmp

Filesize
1.0MB

Download
memory/3736-10-0x0000000010000000-0x000000001047C000-memory.dmp

Filesize
4.5MB

Download
memory/3736-7-0x0000000010000000-0x000000001047C000-memory.dmp

Filesize
4.5MB

Download
memory/3736-14-0x0000000002400000-0x0000000002504000-memory.dmp

Filesize
1.0MB

Download