fe3d4647da281e7f5063094c332b3896cff4a1a4d021d1c00295e674ae7a7be9

General

Target

Invoice_273.xlsm
Size

164KB
MD5

599ce087cc5f550db5e6af6133b6be19
SHA1

4025f5bfe38452647ce0796e3820960702d90b41
SHA256

fe3d4647da281e7f5063094c332b3896cff4a1a4d021d1c00295e674ae7a7be9
SHA512

78ac9fa93e78f03bf0c027640de08ab763d3a12dc0ff33ada9987b8ccb0f719652148f245af44701625f66564c06272781e96118fbc933ce04d42d906ebbd786

Score

10^/10

evasion trojan

Malware Config

Signatures

Process spawned unexpected child process 1 IoCs

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

Processes:

rundll32.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	2264	744	rundll32.exe	EXCEL.EXE

Downloads MZ/PE file
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

1492 rundll32.exe
Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

rundll32.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA rundll32.exe

pid	process
1492	rundll32.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	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

Processes:

EXCEL.EXE

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

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

Script User-Agent 2 IoCs

Uses user-agent string associated with script host/environment.

Processes:

description	flow	ioc
HTTP User-Agent header	26	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	33	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

744 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
744	EXCEL.EXE
744	EXCEL.EXE
744	EXCEL.EXE
744	EXCEL.EXE
744	EXCEL.EXE
744	EXCEL.EXE
744	EXCEL.EXE
744	EXCEL.EXE
744	EXCEL.EXE
744	EXCEL.EXE
744	EXCEL.EXE
744	EXCEL.EXE

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

EXCEL.EXErundll32.exe

description	pid	process	target process
PID 744 wrote to memory of 2264	744	EXCEL.EXE	rundll32.exe
PID 744 wrote to memory of 2264	744	EXCEL.EXE	rundll32.exe
PID 2264 wrote to memory of 1492	2264	rundll32.exe	rundll32.exe
PID 2264 wrote to memory of 1492	2264	rundll32.exe	rundll32.exe
PID 2264 wrote to memory of 1492	2264	rundll32.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\Invoice_273.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:744

C:\Windows\System32\rundll32.exe
"C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Roaming\55230..dll" JsVarAddRef
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:2264

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Roaming\55230..dll" JsVarAddRef
3⤵
- Loads dropped DLL
- Checks whether UAC is enabled
PID:1492

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

3

T1082

Query Registry

2

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\55230..dll
MD5
ab347ac4a6009c298ab6bcdb88484689

SHA1
c2df9e26f6ae89f7fd95e834e502d3000b166409

SHA256
46e8e4e8913a9dd0dd1f50d9ea3ae860d4cad2c1a1334dca1e2f4c062e9201ec

SHA512
c2cb380ab7fbfc2428f89887aba9e07ba2adbb4a724675309593cced29e4be0895ef72950221043f67da345755582a852d1820446ece29ac118cb47c2d59b542

Download Submit
\Users\Admin\AppData\Roaming\55230..dll
MD5
ab347ac4a6009c298ab6bcdb88484689

SHA1
c2df9e26f6ae89f7fd95e834e502d3000b166409

SHA256
46e8e4e8913a9dd0dd1f50d9ea3ae860d4cad2c1a1334dca1e2f4c062e9201ec

SHA512
c2cb380ab7fbfc2428f89887aba9e07ba2adbb4a724675309593cced29e4be0895ef72950221043f67da345755582a852d1820446ece29ac118cb47c2d59b542

Download Submit
memory/744-117-0x00007FFDD78A0000-0x00007FFDD78B0000-memory.dmp

Filesize
64KB

Download
memory/744-114-0x00007FF704AE0000-0x00007FF708096000-memory.dmp

Filesize
53.7MB

Download
memory/744-118-0x00007FFDD78A0000-0x00007FFDD78B0000-memory.dmp

Filesize
64KB

Download
memory/744-119-0x00007FFDD78A0000-0x00007FFDD78B0000-memory.dmp

Filesize
64KB

Download
memory/744-122-0x00007FFDF8040000-0x00007FFDF912E000-memory.dmp

Filesize
16.9MB

Download
memory/744-123-0x00007FFDF6140000-0x00007FFDF8035000-memory.dmp

Filesize
31.0MB

Download
memory/744-116-0x00007FFDD78A0000-0x00007FFDD78B0000-memory.dmp

Filesize
64KB

Download
memory/744-115-0x00007FFDD78A0000-0x00007FFDD78B0000-memory.dmp

Filesize
64KB

Download
memory/1492-181-0x0000000000000000-mapping.dmp

Download
memory/1492-183-0x0000000000790000-0x0000000000796000-memory.dmp

Filesize
24KB

Download
memory/2264-179-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads