806cbd4bab7e77c8a90661c5f92d347ac3e6ba869f1ff1f7b27c5e289ff105ff

General

Target

sample.xlsm
Size

83KB
MD5

bb6fc5f43fe2e829d3cad6f5b906046f
SHA1

8a2b0c47801d6817d2b6021516623a2d9c6542fa
SHA256

806cbd4bab7e77c8a90661c5f92d347ac3e6ba869f1ff1f7b27c5e289ff105ff
SHA512

4a6d83cf5cfd788ddba7a15dfb7396805552c816cb6f615b87101b22789e8b1e1032799f1be1f8110f9ef89f6688e3b8476f95916b37eb6901fe3aa39a214bf3

Score

10^/10

evasion trojan

Malware Config

Signatures

Process spawned unexpected child process 2 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

rundll32.exerundll32.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	3288	3212	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3396	3212	rundll32.exe	EXCEL.EXE

Downloads MZ/PE file
Loads dropped DLL 2 IoCs

Processes:

rundll32.exerundll32.exe

pid process

3464 rundll32.exe
1300 rundll32.exe

pid	process
3464	rundll32.exe
1300	rundll32.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

rundll32.exerundll32.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	rundll32.exe
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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE

Script User-Agent 3 IoCs

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

Processes:

description	flow	ioc
HTTP User-Agent header	37	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	33	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	35	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

3212 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

EXCEL.EXErundll32.exerundll32.exe

description	pid	process	target process
PID 3212 wrote to memory of 3288	3212	EXCEL.EXE	rundll32.exe
PID 3212 wrote to memory of 3288	3212	EXCEL.EXE	rundll32.exe
PID 3288 wrote to memory of 3464	3288	rundll32.exe	rundll32.exe
PID 3288 wrote to memory of 3464	3288	rundll32.exe	rundll32.exe
PID 3288 wrote to memory of 3464	3288	rundll32.exe	rundll32.exe
PID 3212 wrote to memory of 3396	3212	EXCEL.EXE	rundll32.exe
PID 3212 wrote to memory of 3396	3212	EXCEL.EXE	rundll32.exe
PID 3396 wrote to memory of 1300	3396	rundll32.exe	rundll32.exe
PID 3396 wrote to memory of 1300	3396	rundll32.exe	rundll32.exe
PID 3396 wrote to memory of 1300	3396	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\sample.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3212

C:\Windows\System32\rundll32.exe
"C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Roaming\44481.dll" CreateBitmap
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:3288

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Roaming\44481.dll" CreateBitmap
3⤵
- Loads dropped DLL
- Checks whether UAC is enabled
PID:3464

C:\Windows\System32\rundll32.exe
"C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Roaming\44481.dll" CreateBitmap
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:3396

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Roaming\44481.dll" CreateBitmap
3⤵
- Loads dropped DLL
- Checks whether UAC is enabled
PID:1300

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\44481.dll
MD5
c505932ab5535135d29f2be31104c6af

SHA1
780402b58ba39204b723b971c1a96e7bddd5853c

SHA256
88de18ad32abb5e100d5accc9c571c004c4283d17e46deb2043325d8179295ea

SHA512
582bbda02df889b7c70dc2de273a45ff9912afd63cdd990bfb5ab6044d3f1993f95379eb75e7762aba7cee41b0d03c2f96d04cbe5561677b26c5386e34219156

Download Submit
\Users\Admin\AppData\Roaming\44481.dll
MD5
c505932ab5535135d29f2be31104c6af

SHA1
780402b58ba39204b723b971c1a96e7bddd5853c

SHA256
88de18ad32abb5e100d5accc9c571c004c4283d17e46deb2043325d8179295ea

SHA512
582bbda02df889b7c70dc2de273a45ff9912afd63cdd990bfb5ab6044d3f1993f95379eb75e7762aba7cee41b0d03c2f96d04cbe5561677b26c5386e34219156

Download Submit
\Users\Admin\AppData\Roaming\44481.dll
MD5
c505932ab5535135d29f2be31104c6af

SHA1
780402b58ba39204b723b971c1a96e7bddd5853c

SHA256
88de18ad32abb5e100d5accc9c571c004c4283d17e46deb2043325d8179295ea

SHA512
582bbda02df889b7c70dc2de273a45ff9912afd63cdd990bfb5ab6044d3f1993f95379eb75e7762aba7cee41b0d03c2f96d04cbe5561677b26c5386e34219156

Download Submit
memory/1300-185-0x0000000000000000-mapping.dmp

Download
memory/3212-118-0x00007FF8383E0000-0x00007FF8383F0000-memory.dmp

Filesize
64KB

Download
memory/3212-122-0x00007FF8383E0000-0x00007FF8383F0000-memory.dmp

Filesize
64KB

Download
memory/3212-121-0x00007FF858E00000-0x00007FF859EEE000-memory.dmp

Filesize
16.9MB

Download
memory/3212-123-0x000001CBB4050000-0x000001CBB5F45000-memory.dmp

Filesize
31.0MB

Download
memory/3212-179-0x000001CBC7A80000-0x000001CBC7A84000-memory.dmp

Filesize
16KB

Download
memory/3212-114-0x00007FF7E1D00000-0x00007FF7E52B6000-memory.dmp

Filesize
53.7MB

Download
memory/3212-117-0x00007FF8383E0000-0x00007FF8383F0000-memory.dmp

Filesize
64KB

Download
memory/3212-116-0x00007FF8383E0000-0x00007FF8383F0000-memory.dmp

Filesize
64KB

Download
memory/3212-115-0x00007FF8383E0000-0x00007FF8383F0000-memory.dmp

Filesize
64KB

Download
memory/3288-180-0x0000000000000000-mapping.dmp

Download
memory/3396-184-0x0000000000000000-mapping.dmp

Download
memory/3464-182-0x0000000000000000-mapping.dmp

Download
memory/3464-187-0x0000000004A40000-0x0000000004A46000-memory.dmp

Filesize
24KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads