c0fb3410e2ddca4fff784a5aa09f4bc22d46db70a23f934ed69c42c8b98c9d36

General

Target

Invoice #2744.xlsm
Size

196KB
MD5

bad9949e5f34dea3453014179e9f4705
SHA1

4593a7d5c39f17b357923a8ca450353e4267d305
SHA256

c0fb3410e2ddca4fff784a5aa09f4bc22d46db70a23f934ed69c42c8b98c9d36
SHA512

1090732f6f64d502e6531c26fcf7fb25b6323cb60cb36d9be3281312f66d36505727db08542885938e66c5a7f4106f5e90ef99a58318ef74a8dff4f27bf8c712

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	1784	4008	rundll32.exe	EXCEL.EXE

Downloads MZ/PE file
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

2400 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
2400	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 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
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	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

4008 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
4008	EXCEL.EXE
4008	EXCEL.EXE
4008	EXCEL.EXE
4008	EXCEL.EXE
4008	EXCEL.EXE
4008	EXCEL.EXE
4008	EXCEL.EXE
4008	EXCEL.EXE
4008	EXCEL.EXE
4008	EXCEL.EXE
4008	EXCEL.EXE
4008	EXCEL.EXE

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

EXCEL.EXErundll32.exe

description	pid	process	target process
PID 4008 wrote to memory of 1784	4008	EXCEL.EXE	rundll32.exe
PID 4008 wrote to memory of 1784	4008	EXCEL.EXE	rundll32.exe
PID 1784 wrote to memory of 2400	1784	rundll32.exe	rundll32.exe
PID 1784 wrote to memory of 2400	1784	rundll32.exe	rundll32.exe
PID 1784 wrote to memory of 2400	1784	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 #2744.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4008

C:\Windows\System32\rundll32.exe
"C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Roaming\2200..dll" JsVarAddRef
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:1784

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Roaming\2200..dll" JsVarAddRef
3⤵
- Loads dropped DLL
- Checks whether UAC is enabled
PID:2400

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\2200..dll
MD5
9099f93a131065d0c84a7b27c5e6225b

SHA1
08fe0345e15029f06c70109833cfcb641e36dc2e

SHA256
1a245e6b71db0d64fe0d27a113583bef2a65d0fdf3e183c459e6a768504eb79c

SHA512
809eaef442597a8da6d84a8eedb5cfab391f23b728afefd68be20604871680f8c92249642df97b531696224b8f08c80596a029b58ea8f3690d08060491cd726a

Download Submit
\Users\Admin\AppData\Roaming\2200..dll
MD5
9099f93a131065d0c84a7b27c5e6225b

SHA1
08fe0345e15029f06c70109833cfcb641e36dc2e

SHA256
1a245e6b71db0d64fe0d27a113583bef2a65d0fdf3e183c459e6a768504eb79c

SHA512
809eaef442597a8da6d84a8eedb5cfab391f23b728afefd68be20604871680f8c92249642df97b531696224b8f08c80596a029b58ea8f3690d08060491cd726a

Download Submit
memory/1784-179-0x0000000000000000-mapping.dmp

Download
memory/2400-183-0x00000000009B0000-0x00000000009B6000-memory.dmp

Filesize
24KB

Download
memory/2400-181-0x0000000000000000-mapping.dmp

Download
memory/4008-117-0x00007FFF77040000-0x00007FFF77050000-memory.dmp

Filesize
64KB

Download
memory/4008-122-0x00007FFF77040000-0x00007FFF77050000-memory.dmp

Filesize
64KB

Download
memory/4008-123-0x00000211BAE20000-0x00000211BCD15000-memory.dmp

Filesize
31.0MB

Download
memory/4008-121-0x00007FFF976A0000-0x00007FFF9878E000-memory.dmp

Filesize
16.9MB

Download
memory/4008-118-0x00007FFF77040000-0x00007FFF77050000-memory.dmp

Filesize
64KB

Download
memory/4008-114-0x00007FF670F10000-0x00007FF6744C6000-memory.dmp

Filesize
53.7MB

Download
memory/4008-116-0x00007FFF77040000-0x00007FFF77050000-memory.dmp

Filesize
64KB

Download
memory/4008-115-0x00007FFF77040000-0x00007FFF77050000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads