a7d8fad69caf6f20b0e5d0dc32a68b382b6100baf5ca7895ff98f1146fb6a58a

General

Target

elfload2.dll
Size

35KB
MD5

962687402f3ff0259618a668f9baca6d
SHA1

9a06c69fc674c03dd0515feb24853403e15833f2
SHA256

4d6980fec7777a4557a08eceda8f77e8cad70e56f4da563ec4e3fac1b4e423f1
SHA512

497852d2deb3ecddbc10ac07a6153b9bd7d31abcdaea30ae19dc0792eee2f77e34d5547357d0a43dee26111f6edfa83c9372f4ff42917fc378daed3252e70528
SSDEEP

768:+ho2807sCQC7WiwJjKegezHsIvqZhmfKkap0AfTWRewFAdI0bdc:a7sCX7WiwJjKegezHsIvAJJ0ACRzAG0O

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\SystemBiosDate	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	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 12 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3F97D07F-1A7E-1F74-4259-375779F76D41}\InprocServer32\2.0.50727\ImplementedInThisVersion	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3F97D07F-1A7E-1F74-4259-375779F76D41}\Server\ = "diasymreader.dll"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3F97D07F-1A7E-1F74-4259-375779F76D41}	rundll32.exe
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\2.0.50727\ = "2.0.50727"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3F97D07F-1A7E-1F74-4259-375779F76D41}\InprocServer32\2.0.50727	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3F97D07F-1A7E-1F74-4259-375779F76D41}\ProgID	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3F97D07F-1A7E-1F74-4259-375779F76D41}\ProgID\ = "CorSymReader_SxS"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3F97D07F-1A7E-1F74-4259-375779F76D41}\Server	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3F97D07F-1A7E-1F74-4259-375779F76D41}\ = "NDP SymReader"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3F97D07F-1A7E-1F74-4259-375779F76D41}\InprocServer32\ = "mscoree.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3F97D07F-1A7E-1F74-4259-375779F76D41}\InprocServer32\ThreadingModel = "Both"	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: 33	1320	rundll32.exe
Token: SeIncBasePriorityPrivilege	1320	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2488 wrote to memory of 1320	2488	rundll32.exe	29
PID 2488 wrote to memory of 1320	2488	rundll32.exe	29
PID 2488 wrote to memory of 1320	2488	rundll32.exe	29
PID 2488 wrote to memory of 1320	2488	rundll32.exe	29
PID 2488 wrote to memory of 1320	2488	rundll32.exe	29
PID 2488 wrote to memory of 1320	2488	rundll32.exe	29
PID 2488 wrote to memory of 1320	2488	rundll32.exe	29

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\elfload2.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2488
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\elfload2.dll,#1
  2⤵
  - Checks BIOS information in registry
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  PID:1320

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1320-0-0x0000000003090000-0x000000000350C000-memory.dmp

Filesize
4.5MB

Download
memory/1320-1-0x00000000037E0000-0x00000000038E4000-memory.dmp

Filesize
1.0MB

Download
memory/1320-7-0x00000000037E0000-0x00000000038E4000-memory.dmp

Filesize
1.0MB

Download
memory/1320-11-0x0000000003090000-0x000000000350C000-memory.dmp

Filesize
4.5MB

Download
memory/1320-13-0x0000000003090000-0x000000000350C000-memory.dmp

Filesize
4.5MB

Download
memory/1320-14-0x00000000037E0000-0x00000000038E4000-memory.dmp

Filesize
1.0MB

Download
memory/1320-12-0x0000000000330000-0x0000000000350000-memory.dmp

Filesize
128KB

Download
memory/1320-10-0x0000000003090000-0x000000000350C000-memory.dmp

Filesize
4.5MB

Download
memory/1320-8-0x0000000003090000-0x000000000350C000-memory.dmp

Filesize
4.5MB

Download
memory/1320-16-0x00000000037E0000-0x00000000038E4000-memory.dmp

Filesize
1.0MB

Download
memory/1320-15-0x0000000003090000-0x000000000350C000-memory.dmp

Filesize
4.5MB

Download
memory/1320-17-0x00000000037E0000-0x00000000038E4000-memory.dmp

Filesize
1.0MB

Download
memory/1320-18-0x0000000003090000-0x000000000350C000-memory.dmp

Filesize
4.5MB

Download
memory/1320-19-0x00000000037E0000-0x00000000038E4000-memory.dmp

Filesize
1.0MB

Download

Analysis

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