3bd55c9e2fdcd1b707612af00bcc75f5e11640d9d9952ddf3a68d107f27f9102

General

Target

Invoice #535576.xlsm
Size

161KB
MD5

c02eba6c5cb189c3dfd85199b785077b
SHA1

7b1c517e64a46840a9da597496325a30ab7f42a1
SHA256

3bd55c9e2fdcd1b707612af00bcc75f5e11640d9d9952ddf3a68d107f27f9102
SHA512

d3d88facce07bc5bb573ec6cb895e40220c5dca9e36437aaf19739fd6ec6c38473cee8c2a82ec0ee411404e6b9e62c68d2cc2761346087c41d1dca524e0809bb

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	3644	4044	rundll32.exe	EXCEL.EXE

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

3616 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
3616	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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

4044 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
4044	EXCEL.EXE
4044	EXCEL.EXE
4044	EXCEL.EXE
4044	EXCEL.EXE
4044	EXCEL.EXE
4044	EXCEL.EXE
4044	EXCEL.EXE
4044	EXCEL.EXE
4044	EXCEL.EXE
4044	EXCEL.EXE
4044	EXCEL.EXE
4044	EXCEL.EXE

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

EXCEL.EXErundll32.exe

description	pid	process	target process
PID 4044 wrote to memory of 3644	4044	EXCEL.EXE	rundll32.exe
PID 4044 wrote to memory of 3644	4044	EXCEL.EXE	rundll32.exe
PID 3644 wrote to memory of 3616	3644	rundll32.exe	rundll32.exe
PID 3644 wrote to memory of 3616	3644	rundll32.exe	rundll32.exe
PID 3644 wrote to memory of 3616	3644	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 #535576.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4044

C:\Windows\System32\rundll32.exe
"C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Roaming\20533..dll" JsVarAddRef
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:3644

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Roaming\20533..dll" JsVarAddRef
3⤵
- Loads dropped DLL
- Checks whether UAC is enabled
PID:3616

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\20533..dll
MD5
34fd794a5b84bc9a61ba8b2cc1675e1f

SHA1
9d13c78fc41dea91583479eaf060bdd9d3197d2f

SHA256
d082b7624d08c8d2b70a237dab787c9e9c3b2f35f67da96b057e310d88278f9a

SHA512
a1a93ed7ffad1e6a9922272015ba7e3023356db506ebcc5edde68f7be91ccabbeaa5c614dff8c37ce0c2c66994d7acd715b8935a6695a3c50719df01226d4d59

Download Submit
\Users\Admin\AppData\Roaming\20533..dll
MD5
34fd794a5b84bc9a61ba8b2cc1675e1f

SHA1
9d13c78fc41dea91583479eaf060bdd9d3197d2f

SHA256
d082b7624d08c8d2b70a237dab787c9e9c3b2f35f67da96b057e310d88278f9a

SHA512
a1a93ed7ffad1e6a9922272015ba7e3023356db506ebcc5edde68f7be91ccabbeaa5c614dff8c37ce0c2c66994d7acd715b8935a6695a3c50719df01226d4d59

Download Submit
memory/3616-183-0x0000000000BD0000-0x0000000000BD6000-memory.dmp

Filesize
24KB

Download
memory/3616-181-0x0000000000000000-mapping.dmp

Download
memory/3644-179-0x0000000000000000-mapping.dmp

Download
memory/4044-117-0x00007FFB5C580000-0x00007FFB5C590000-memory.dmp

Filesize
64KB

Download
memory/4044-122-0x00007FFB7D030000-0x00007FFB7E11E000-memory.dmp

Filesize
16.9MB

Download
memory/4044-123-0x00007FFB7B130000-0x00007FFB7D025000-memory.dmp

Filesize
31.0MB

Download
memory/4044-119-0x00007FFB5C580000-0x00007FFB5C590000-memory.dmp

Filesize
64KB

Download
memory/4044-118-0x00007FFB5C580000-0x00007FFB5C590000-memory.dmp

Filesize
64KB

Download
memory/4044-114-0x00007FF7CEBD0000-0x00007FF7D2186000-memory.dmp

Filesize
53.7MB

Download
memory/4044-116-0x00007FFB5C580000-0x00007FFB5C590000-memory.dmp

Filesize
64KB

Download
memory/4044-115-0x00007FFB5C580000-0x00007FFB5C590000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads