2b33598b4c6bea00c8a9bc7b7478af63c18fe046a9050ff74fb58f15e14b6f67

General

Target
generic download.xls
Size 36KB
Sample220226-13xt6achap
SHA256 2b33598b4c6bea00c8a9bc7b7478af63c18fe046a9050ff74fb58f15e14b6f67
MD5 f4f0b5acd33651cfe58bfd4c9431ae57
SHA1 77160f10ad90848d358abe86da95ba2ecf6d3612
SHA512 179b8911c7627e6598a3ce47dc713a2fa84c5f684a21614dda3015080cee15a193407c47554ae9e9a5cd9c74214e03fd63cbebb67231cec9e3d1183af8068eb9
MD5 SHA1 SHA512

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	1520	2960	explorer.exe	80

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 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
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

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

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000_Classes\Local Settings	explorer.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2960	EXCEL.EXE

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2960	EXCEL.EXE

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
2960	EXCEL.EXE
2960	EXCEL.EXE
2960	EXCEL.EXE
2960	EXCEL.EXE
2960	EXCEL.EXE
2960	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2960 wrote to memory of 1520	2960	EXCEL.EXE	86
PID 2960 wrote to memory of 1520	2960	EXCEL.EXE	86
PID 1864 wrote to memory of 3084	1864	explorer.exe	89
PID 1864 wrote to memory of 3084	1864	explorer.exe	89

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\generic download.xls"
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:2960
- C:\Windows\explorer.exe
  explorer.exe C:\Users\Public\Documents\aH1p.vbs
  2⤵
  - Process spawned unexpected child process
  PID:1520

C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1864
- C:\Windows\System32\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Public\Documents\aH1p.vbs"
  2⤵
  PID:3084

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/2960-130-0x00007FFAF6B90000-0x00007FFAF6BA0000-memory.dmp

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memory/2960-131-0x00007FFAF6B90000-0x00007FFAF6BA0000-memory.dmp

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memory/2960-132-0x00007FFAF6B90000-0x00007FFAF6BA0000-memory.dmp

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memory/2960-133-0x00007FFAF6B90000-0x00007FFAF6BA0000-memory.dmp

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memory/2960-134-0x00007FFAF6B90000-0x00007FFAF6BA0000-memory.dmp

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memory/2960-136-0x00007FFB36BB0000-0x00007FFB36BB1000-memory.dmp

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memory/2960-135-0x00007FFB36BAD000-0x00007FFB36BAE000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads