b1c94889b4e1b6b9888b923eb50558b305258cb8acb2fc7bf87c95f6fe313d6d

General

Target

b1c94889b4e1b6b9888b923eb50558b305258cb8acb2fc7bf87c95f6fe313d6d.xlsm
Size

160KB
MD5

ccd24fe5cf3deb13ed67c5e0a5217084
SHA1

f911b43b48f17a978978376d5159916a6c07e9c3
SHA256

b1c94889b4e1b6b9888b923eb50558b305258cb8acb2fc7bf87c95f6fe313d6d
SHA512

d804f4809a18f2453c026ab58a95504671ba05d19968adc1e3496afab64e6a6ca5e9d5b57db41954ae94e1b397621da679d8c98346e2e4bf8b6bdd5f258d451a

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	192	3680	rundll32.exe	EXCEL.EXE

Downloads MZ/PE file
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

2612 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
2612	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 1 IoCs
Uses user-agent string associated with script host/environment.

Processes:

description flow ioc

HTTP User-Agent header 17 Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

3680 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

3680 EXCEL.EXE
3680 EXCEL.EXE

description	flow	ioc
HTTP User-Agent header	17	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE
3680	EXCEL.EXE

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

EXCEL.EXErundll32.exe

description	pid	process	target process
PID 3680 wrote to memory of 192	3680	EXCEL.EXE	rundll32.exe
PID 3680 wrote to memory of 192	3680	EXCEL.EXE	rundll32.exe
PID 192 wrote to memory of 2612	192	rundll32.exe	rundll32.exe
PID 192 wrote to memory of 2612	192	rundll32.exe	rundll32.exe
PID 192 wrote to memory of 2612	192	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\b1c94889b4e1b6b9888b923eb50558b305258cb8acb2fc7bf87c95f6fe313d6d.xlsm"
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:3680

C:\Windows\System32\rundll32.exe
"C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Roaming\53636..dll" JsVarAddRef
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:192

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Roaming\53636..dll" JsVarAddRef
3⤵
- Loads dropped DLL
- Checks whether UAC is enabled
PID:2612

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\53636..dll

MD5
c4c086a53424a1a54ae0356242b88a9c

SHA1
0d0b677970d1c8116b2fde64b7c4dd1fb85b54fb

SHA256
5329a4f41c63999bcefc6d1fae75be754ff8608a1d52a4ce1c7edcfe02aff65d

SHA512
9be8ea8d9b8e1e19a507a604af3a01bf5a8b4f389e290f6b8303dd55ed4852b6fefa219015a89507955518edc5300d48b6136cacf4e40f64813362afa1da4bc8

Download Submit
\Users\Admin\AppData\Roaming\53636..dll

MD5
c4c086a53424a1a54ae0356242b88a9c

SHA1
0d0b677970d1c8116b2fde64b7c4dd1fb85b54fb

SHA256
5329a4f41c63999bcefc6d1fae75be754ff8608a1d52a4ce1c7edcfe02aff65d

SHA512
9be8ea8d9b8e1e19a507a604af3a01bf5a8b4f389e290f6b8303dd55ed4852b6fefa219015a89507955518edc5300d48b6136cacf4e40f64813362afa1da4bc8

Download Submit
memory/192-179-0x0000000000000000-mapping.dmp

Download
memory/2612-183-0x0000000000AA0000-0x0000000000AA6000-memory.dmp

Filesize
24KB

Download
memory/2612-181-0x0000000000000000-mapping.dmp

Download
memory/3680-117-0x00007FF85A170000-0x00007FF85A180000-memory.dmp

Filesize
64KB

Download
memory/3680-122-0x00007FF87ABF0000-0x00007FF87BCDE000-memory.dmp

Filesize
16.9MB

Download
memory/3680-123-0x00007FF878CF0000-0x00007FF87ABE5000-memory.dmp

Filesize
31.0MB

Download
memory/3680-119-0x00007FF85A170000-0x00007FF85A180000-memory.dmp

Filesize
64KB

Download
memory/3680-118-0x00007FF85A170000-0x00007FF85A180000-memory.dmp

Filesize
64KB

Download
memory/3680-114-0x00007FF708AA0000-0x00007FF70C056000-memory.dmp

Filesize
53.7MB

Download
memory/3680-116-0x00007FF85A170000-0x00007FF85A180000-memory.dmp

Filesize
64KB

Download
memory/3680-115-0x00007FF85A170000-0x00007FF85A180000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads