d7a6f8318f48d36e7b4e7a6d4a202c92e2f321f0b54aa8ba55e869974ec7a0b6

General

Target

8bdcc1592ffaee9154ed4331a44fa52af3b2baebbd4ef71840adc73b38635d9e.xlsm
Size

155KB
MD5

77f482d7c33d70474d451cf2546f4b4f
SHA1

9ef86f2a8171e50ec5734886d895885280e029d8
SHA256

8bdcc1592ffaee9154ed4331a44fa52af3b2baebbd4ef71840adc73b38635d9e
SHA512

f656c8f2a14ddb066469f20ab5303f5a0ec18d17648e67a59fde4902dc923f5a70fe4cc4964251a705275e98073df76821ec6e3ee8d93982fb86ec71a698404a

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	2684	648	rundll32.exe	EXCEL.EXE

Downloads MZ/PE file
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

1488 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
1488	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	28	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	24	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

648 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

EXCEL.EXErundll32.exe

description	pid	process	target process
PID 648 wrote to memory of 2684	648	EXCEL.EXE	rundll32.exe
PID 648 wrote to memory of 2684	648	EXCEL.EXE	rundll32.exe
PID 2684 wrote to memory of 1488	2684	rundll32.exe	rundll32.exe
PID 2684 wrote to memory of 1488	2684	rundll32.exe	rundll32.exe
PID 2684 wrote to memory of 1488	2684	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\8bdcc1592ffaee9154ed4331a44fa52af3b2baebbd4ef71840adc73b38635d9e.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:648

C:\Windows\System32\rundll32.exe
"C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Roaming\43590..dll" JsVarAddRef
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:2684

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Roaming\43590..dll" JsVarAddRef
3⤵
- Loads dropped DLL
- Checks whether UAC is enabled
PID:1488

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\43590..dll
MD5
d2f953ecea3887fb038b9e558a57de9d

SHA1
45382b0422906e4b9814ba29dc7482b2db02a77f

SHA256
57404952b2214c55fe96d63d6ab6a7808151bd862eca2b98b76244308c1d0238

SHA512
c38874a7e6592877430fec68692c491651fe49258e9a9db8ec0ca986736fbf326cca5a691697cc78a35abdc58649c9790b4e96e17559e62e29f567e8b9e5c02f

Download Submit
\Users\Admin\AppData\Roaming\43590..dll
MD5
d2f953ecea3887fb038b9e558a57de9d

SHA1
45382b0422906e4b9814ba29dc7482b2db02a77f

SHA256
57404952b2214c55fe96d63d6ab6a7808151bd862eca2b98b76244308c1d0238

SHA512
c38874a7e6592877430fec68692c491651fe49258e9a9db8ec0ca986736fbf326cca5a691697cc78a35abdc58649c9790b4e96e17559e62e29f567e8b9e5c02f

Download Submit
memory/648-117-0x00007FFAC4B10000-0x00007FFAC4B20000-memory.dmp

Filesize
64KB

Download
memory/648-114-0x00007FF6BA880000-0x00007FF6BDE36000-memory.dmp

Filesize
53.7MB

Download
memory/648-118-0x00007FFAC4B10000-0x00007FFAC4B20000-memory.dmp

Filesize
64KB

Download
memory/648-121-0x00007FFAC4B10000-0x00007FFAC4B20000-memory.dmp

Filesize
64KB

Download
memory/648-122-0x00007FFAE52A0000-0x00007FFAE638E000-memory.dmp

Filesize
16.9MB

Download
memory/648-123-0x00007FFAE33A0000-0x00007FFAE5295000-memory.dmp

Filesize
31.0MB

Download
memory/648-116-0x00007FFAC4B10000-0x00007FFAC4B20000-memory.dmp

Filesize
64KB

Download
memory/648-115-0x00007FFAC4B10000-0x00007FFAC4B20000-memory.dmp

Filesize
64KB

Download
memory/1488-181-0x0000000000000000-mapping.dmp

Download
memory/1488-183-0x0000000000D30000-0x0000000000D36000-memory.dmp

Filesize
24KB

Download
memory/2684-179-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads