d54fa3d2b17706fe6e4c1159c04ff2bbc4f2403de5855f73a038ed8335e7e3f2

General

Target

sample.xls
Size

276KB
MD5

5cd0bfc13e54454404bdea0a16d5fbba
SHA1

c191aeed68de9ebcbd8cf14aa4d6465e305e6603
SHA256

d54fa3d2b17706fe6e4c1159c04ff2bbc4f2403de5855f73a038ed8335e7e3f2
SHA512

cee9509a75a51f740ad087b4af2116b2644999aabbbea2281efc90ec298786f66ba4a211c3a83b6e0a7a6d6c3fcfa51e146d3fc19683c5f302fc52c132fe014d

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 5 IoCs

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

Processes:

rundll32.exerundll32.exerundll32.exerundll32.exerundll32.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2336	540	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2440	540	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	760	540	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2660	540	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1816	540	rundll32.exe	EXCEL.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

Processes:

EXCEL.EXE

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

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

Processes:

EXCEL.EXE

pid process

540 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 540 wrote to memory of 2336	540	EXCEL.EXE	rundll32.exe
PID 540 wrote to memory of 2336	540	EXCEL.EXE	rundll32.exe
PID 540 wrote to memory of 2440	540	EXCEL.EXE	rundll32.exe
PID 540 wrote to memory of 2440	540	EXCEL.EXE	rundll32.exe
PID 540 wrote to memory of 760	540	EXCEL.EXE	rundll32.exe
PID 540 wrote to memory of 760	540	EXCEL.EXE	rundll32.exe
PID 540 wrote to memory of 2660	540	EXCEL.EXE	rundll32.exe
PID 540 wrote to memory of 2660	540	EXCEL.EXE	rundll32.exe
PID 540 wrote to memory of 1816	540	EXCEL.EXE	rundll32.exe
PID 540 wrote to memory of 1816	540	EXCEL.EXE	rundll32.exe

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\sample.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:540
- C:\Windows\SYSTEM32\rundll32.exe
  rundll32 ..\Runtime.brok,DllRegisterServer
  2⤵
  - Process spawned unexpected child process
  PID:2336
- C:\Windows\SYSTEM32\rundll32.exe
  rundll32 ..\Runtime.brok1,DllRegisterServer
  2⤵
  - Process spawned unexpected child process
  PID:2440
- C:\Windows\SYSTEM32\rundll32.exe
  rundll32 ..\Runtime.brok2,DllRegisterServer
  2⤵
  - Process spawned unexpected child process
  PID:760
- C:\Windows\SYSTEM32\rundll32.exe
  rundll32 ..\Runtime.brok3,DllRegisterServer
  2⤵
  - Process spawned unexpected child process
  PID:2660
- C:\Windows\SYSTEM32\rundll32.exe
  rundll32 ..\Runtime.brok4,DllRegisterServer
  2⤵
  - Process spawned unexpected child process
  PID:1816

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

C:\Users\Admin\Runtime.brok1

MD5
153665460fe2578e8dc4e36ef7077d80

SHA1
40a90b6f98c358bdbdd6e5842c186d919cdde7e3

SHA256
3ad4b3ff863a1ff41ea1e6ebb34f374a8d54804ec27b5531d05e579374bd602b

SHA512
31abced5777e4c5dd3f155fbda068ab786a57e0d24cb535d41379c471011a6ac757f2ad4802c52249b3280065c4ce31e3a7f932637d8ee37adbccdab3a2bf2f8

Download Submit
memory/540-2-0x00007FF983B50000-0x00007FF983B60000-memory.dmp

Filesize
64KB

Download
memory/540-3-0x00007FF983B50000-0x00007FF983B60000-memory.dmp

Filesize
64KB

Download
memory/540-4-0x00007FF983B50000-0x00007FF983B60000-memory.dmp

Filesize
64KB

Download
memory/540-5-0x00007FF983B50000-0x00007FF983B60000-memory.dmp

Filesize
64KB

Download
memory/540-6-0x00007FF9A7100000-0x00007FF9A7737000-memory.dmp

Filesize
6.2MB

Download
memory/760-10-0x0000000000000000-mapping.dmp

Download
memory/1816-12-0x0000000000000000-mapping.dmp

Download
memory/2336-7-0x0000000000000000-mapping.dmp

Download
memory/2440-8-0x0000000000000000-mapping.dmp

Download
memory/2660-11-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads