ee84727646dbe5da844764980ca6bbc9cc60992973a6f68e641e6f66c19db8fb

General

Target
sorry.xls
Size 36KB
Sample220226-wnlfcsbdb3
SHA256 ee84727646dbe5da844764980ca6bbc9cc60992973a6f68e641e6f66c19db8fb
MD5 de900d919c9eea307cf392bf173f66b6
SHA1 24b0e0e7055ce860a1f209d9ce7adc1dfec65fbb
SHA512 12e378afab868eb845eb66ccaf0abb04747aa0bf998abc6d4f59b0d18d2966c849a8c50d951462c7b2ff8b9257a41a83e8bf56fe9e532dc6ee0bdb2e929a8f0c
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	2280	3828	explorer.exe	56

Blocklisted process makes network request 2 IoCs

flow	pid	Process
43	3768	WScript.exe
60	3768	WScript.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

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000_Classes\Local Settings	explorer.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3828	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3828	EXCEL.EXE
3828	EXCEL.EXE
3828	EXCEL.EXE
3828	EXCEL.EXE
3828	EXCEL.EXE
3828	EXCEL.EXE
3828	EXCEL.EXE
3828	EXCEL.EXE
3828	EXCEL.EXE
3828	EXCEL.EXE
3828	EXCEL.EXE
3828	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3828 wrote to memory of 2280	3828	EXCEL.EXE	66
PID 3828 wrote to memory of 2280	3828	EXCEL.EXE	66
PID 1856 wrote to memory of 3768	1856	explorer.exe	68
PID 1856 wrote to memory of 3768	1856	explorer.exe	68

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\sorry.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3828
- C:\Windows\explorer.exe
  explorer.exe C:\Users\Public\Documents\nEF00JP.vbs
  2⤵
  - Process spawned unexpected child process
  PID:2280

C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1856
- C:\Windows\System32\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Public\Documents\nEF00JP.vbs"
  2⤵
  - Blocklisted process makes network request
  PID:3768

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/3828-131-0x00007FFC73830000-0x00007FFC73840000-memory.dmp

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memory/3828-132-0x00007FFC73830000-0x00007FFC73840000-memory.dmp

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memory/3828-133-0x00007FFC73830000-0x00007FFC73840000-memory.dmp

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memory/3828-134-0x00007FFC73830000-0x00007FFC73840000-memory.dmp

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memory/3828-135-0x00007FFC73830000-0x00007FFC73840000-memory.dmp

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memory/3828-136-0x00007FFCB384D000-0x00007FFCB384E000-memory.dmp

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memory/3828-137-0x00007FFCB3850000-0x00007FFCB3851000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads