6d6ff6f138defb2bb7602c08c1cb22930f5e30ef264eeaf760f99d4ca95beca7

General

Target

subscription_1618592996.xlsb
Size

269KB
MD5

e86b9229ec1b692dff17c074843d27da
SHA1

61598ee67b6f4f5ac01a5f0752dfe3324d00c66f
SHA256

6d6ff6f138defb2bb7602c08c1cb22930f5e30ef264eeaf760f99d4ca95beca7
SHA512

a8f9105ab7b360c492e0409d1d5b3912eba29fe2175036af676083a145f0a80b5924745d3b64b8ac82f499ac3c16df15c6650f30ea9bb006cca30931984e265b

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3428	640	cmd.exe	67

Blocklisted process makes network request 1 IoCs

flow	pid	Process
33	900	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
900	rundll32.exe

Checks processor information in registry 2 TTPs 3 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	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
640	EXCEL.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
640	EXCEL.EXE
640	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
640	EXCEL.EXE
640	EXCEL.EXE
640	EXCEL.EXE
640	EXCEL.EXE
640	EXCEL.EXE
640	EXCEL.EXE
640	EXCEL.EXE
640	EXCEL.EXE
640	EXCEL.EXE
640	EXCEL.EXE
640	EXCEL.EXE
640	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 640 wrote to memory of 3428	640	EXCEL.EXE	80
PID 640 wrote to memory of 3428	640	EXCEL.EXE	80
PID 3428 wrote to memory of 3692	3428	cmd.exe	82
PID 3428 wrote to memory of 3692	3428	cmd.exe	82
PID 3428 wrote to memory of 2108	3428	cmd.exe	83
PID 3428 wrote to memory of 2108	3428	cmd.exe	83
PID 2108 wrote to memory of 900	2108	rundll32.exe	84
PID 2108 wrote to memory of 900	2108	rundll32.exe	84
PID 2108 wrote to memory of 900	2108	rundll32.exe	84

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\subscription_1618592996.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:640
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c certutil -decode %PUBLIC%\496258.dof %PUBLIC%\496258.doh && rundll32 %PUBLIC%\496258.doh,DF1
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:3428
- - C:\Windows\system32\certutil.exe
    certutil -decode C:\Users\Public\496258.dof C:\Users\Public\496258.doh
    3⤵
    PID:3692
- - C:\Windows\system32\rundll32.exe
    rundll32 C:\Users\Public\496258.doh,DF1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2108
  - - C:\Windows\SysWOW64\rundll32.exe
      rundll32 C:\Users\Public\496258.doh,DF1
      4⤵
      Blocklisted process makes network request
      Loads dropped DLL
      PID:900

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/640-122-0x00007FFAE5120000-0x00007FFAE620E000-memory.dmp

Filesize
16.9MB

Download
memory/640-118-0x00007FFAC4B10000-0x00007FFAC4B20000-memory.dmp

Filesize
64KB

Download
memory/640-121-0x00007FFAC4B10000-0x00007FFAC4B20000-memory.dmp

Filesize
64KB

Download
memory/640-114-0x00007FF79CF60000-0x00007FF7A0516000-memory.dmp

Filesize
53.7MB

Download
memory/640-123-0x00007FFAE3220000-0x00007FFAE5115000-memory.dmp

Filesize
31.0MB

Download
memory/640-117-0x00007FFAC4B10000-0x00007FFAC4B20000-memory.dmp

Filesize
64KB

Download
memory/640-116-0x00007FFAC4B10000-0x00007FFAC4B20000-memory.dmp

Filesize
64KB

Download
memory/640-115-0x00007FFAC4B10000-0x00007FFAC4B20000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads