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	3492	1016	rundll32.exe	EXCEL.EXE

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

2144 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
2144	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

1016 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE
1016	EXCEL.EXE

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

EXCEL.EXErundll32.exe

description	pid	process	target process
PID 1016 wrote to memory of 3492	1016	EXCEL.EXE	rundll32.exe
PID 1016 wrote to memory of 3492	1016	EXCEL.EXE	rundll32.exe
PID 3492 wrote to memory of 2144	3492	rundll32.exe	rundll32.exe
PID 3492 wrote to memory of 2144	3492	rundll32.exe	rundll32.exe
PID 3492 wrote to memory of 2144	3492	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:1016

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:3492

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:2144

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\20533..dll
MD5
4d81b85d1242d6ecb66861b8e0dc4eee

SHA1
12a5d2dbfc18bd57abc0d3ddbdf2481139a652dd

SHA256
25bef943b9c4a61089dfdd15c60afcc7eedfdbd997e284058e034f1e9ca7fd17

SHA512
d9ede17f611916bd1dff6a069fd7b4ee52ab8486f75f9ce01e4294abf648fe8ce0461be03f4a3c2cd08c7f2bcb09e3294a5f1bebae1f94103d2102dbbff5103d

Download Submit
\Users\Admin\AppData\Roaming\20533..dll
MD5
4d81b85d1242d6ecb66861b8e0dc4eee

SHA1
12a5d2dbfc18bd57abc0d3ddbdf2481139a652dd

SHA256
25bef943b9c4a61089dfdd15c60afcc7eedfdbd997e284058e034f1e9ca7fd17

SHA512
d9ede17f611916bd1dff6a069fd7b4ee52ab8486f75f9ce01e4294abf648fe8ce0461be03f4a3c2cd08c7f2bcb09e3294a5f1bebae1f94103d2102dbbff5103d

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memory/1016-117-0x00007FFC964C0000-0x00007FFC964D0000-memory.dmp

Filesize
64KB

Download
memory/1016-114-0x00007FF78D2B0000-0x00007FF790866000-memory.dmp

Filesize
53.7MB

Download
memory/1016-118-0x00007FFC964C0000-0x00007FFC964D0000-memory.dmp

Filesize
64KB

Download
memory/1016-121-0x00007FFC964C0000-0x00007FFC964D0000-memory.dmp

Filesize
64KB

Download
memory/1016-122-0x00007FFCB6D90000-0x00007FFCB7E7E000-memory.dmp

Filesize
16.9MB

Download
memory/1016-123-0x00000266B65C0000-0x00000266B84B5000-memory.dmp

Filesize
31.0MB

Download
memory/1016-116-0x00007FFC964C0000-0x00007FFC964D0000-memory.dmp

Filesize
64KB

Download
memory/1016-115-0x00007FFC964C0000-0x00007FFC964D0000-memory.dmp

Filesize
64KB

Download
memory/2144-181-0x0000000000000000-mapping.dmp

Download
memory/2144-183-0x0000000000AA0000-0x0000000000AA6000-memory.dmp

Filesize
24KB

Download
memory/3492-179-0x0000000000000000-mapping.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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