nloader | 522245f192f8a25267d3c07be6cefa5f9ae583f62ac781577c8653f5cf00f7f6

General

Target

subscription_1618344415.xlsb
Size

181KB
MD5

307a6d965c1435b17e3fe2ab03f92d16
SHA1

47965c868c70245f783fcace03271eb287761c51
SHA256

522245f192f8a25267d3c07be6cefa5f9ae583f62ac781577c8653f5cf00f7f6
SHA512

596ea5cd389a298953b9dde78f3d95e0ffcc0e61d5b047f9dc6100adb405d36356e570019b376f0eacd95f397231fe54996a7ca269e9930ff7e395b5cab755ff

Score

10^/10

nloader loader

Malware Config

Signatures

Nloader
Simple loader that includes the keyword 'campo' in the URL used to download other families.
loader nloader

Process spawned unexpected child process 1 IoCs

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

Processes:

cmd.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	900	808	cmd.exe	EXCEL.EXE

Nloader Payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1328-186-0x0000000004D60000-0x0000000004D65000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

Processes:

rundll32.exe

flow pid process

30 1328 rundll32.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

1328 rundll32.exe

flow	pid	process
30	1328	rundll32.exe

pid	process
1328	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

808 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
808	EXCEL.EXE
808	EXCEL.EXE
808	EXCEL.EXE
808	EXCEL.EXE
808	EXCEL.EXE
808	EXCEL.EXE
808	EXCEL.EXE
808	EXCEL.EXE
808	EXCEL.EXE
808	EXCEL.EXE
808	EXCEL.EXE
808	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

EXCEL.EXEcmd.exerundll32.exe

description	pid	process	target process
PID 808 wrote to memory of 900	808	EXCEL.EXE	cmd.exe
PID 808 wrote to memory of 900	808	EXCEL.EXE	cmd.exe
PID 900 wrote to memory of 3468	900	cmd.exe	certutil.exe
PID 900 wrote to memory of 3468	900	cmd.exe	certutil.exe
PID 900 wrote to memory of 2232	900	cmd.exe	rundll32.exe
PID 900 wrote to memory of 2232	900	cmd.exe	rundll32.exe
PID 2232 wrote to memory of 1328	2232	rundll32.exe	rundll32.exe
PID 2232 wrote to memory of 1328	2232	rundll32.exe	rundll32.exe
PID 2232 wrote to memory of 1328	2232	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\subscription_1618344415.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:808

C:\Windows\SYSTEM32\cmd.exe
cmd.exe /c certutil -decode %PUBLIC%\31927.dpi %PUBLIC%\31927.pdo && rundll32 %PUBLIC%\31927.pdo,DF1
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:900

C:\Windows\system32\certutil.exe
certutil -decode C:\Users\Public\31927.dpi C:\Users\Public\31927.pdo
3⤵
PID:3468

C:\Windows\system32\rundll32.exe
rundll32 C:\Users\Public\31927.pdo,DF1
3⤵
- Suspicious use of WriteProcessMemory
PID:2232

C:\Windows\SysWOW64\rundll32.exe
rundll32 C:\Users\Public\31927.pdo,DF1
4⤵
- Blocklisted process makes network request
- Loads dropped DLL
PID:1328

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Public\31927.dpi

MD5
466fa8ac78b38bf6ae25c01b5fc532a2

SHA1
c3b2ba41743af5c3e2b57388e69a915f2f548394

SHA256
762dee7768d6787a8bd692746cc2c9a773bac0075b4cc960b116816c7b9b5b33

SHA512
ee62337f2cdedc4e32b6928879f94884672cf8e0d267e094694be04861aff90b53d7ade0134ba308008f477c820469888c682305ad75d408a941219f8e856674

Download Submit
C:\Users\Public\31927.pdo

MD5
865a9d729e1c77c45295314c48f75756

SHA1
3b12aa209e04df1d6a0f23e5ce64b4ceb1fe56d7

SHA256
78732a575117a9f053a8a7dbeb0e4293265be4c901fa3cc124d31d6fc369939e

SHA512
a2bbf49e8afccef53ce3eb0e3701b2771abd5002ec762ecf6d60bf8e0c98749bd21cefe2307602be0f3b7f8ddfb3d5c691b0c1fc9e02c9337489f4e85e4ae683

Download Submit
\Users\Public\31927.pdo

MD5
865a9d729e1c77c45295314c48f75756

SHA1
3b12aa209e04df1d6a0f23e5ce64b4ceb1fe56d7

SHA256
78732a575117a9f053a8a7dbeb0e4293265be4c901fa3cc124d31d6fc369939e

SHA512
a2bbf49e8afccef53ce3eb0e3701b2771abd5002ec762ecf6d60bf8e0c98749bd21cefe2307602be0f3b7f8ddfb3d5c691b0c1fc9e02c9337489f4e85e4ae683

Download Submit
memory/808-118-0x00007FF999990000-0x00007FF9999A0000-memory.dmp

Filesize
64KB

Download
memory/808-114-0x00007FF6EC200000-0x00007FF6EF7B6000-memory.dmp

Filesize
53.7MB

Download
memory/808-121-0x00007FF999990000-0x00007FF9999A0000-memory.dmp

Filesize
64KB

Download
memory/808-122-0x00007FF9B9E90000-0x00007FF9BAF7E000-memory.dmp

Filesize
16.9MB

Download
memory/808-123-0x00007FF9B7F90000-0x00007FF9B9E85000-memory.dmp

Filesize
31.0MB

Download
memory/808-117-0x00007FF999990000-0x00007FF9999A0000-memory.dmp

Filesize
64KB

Download
memory/808-116-0x00007FF999990000-0x00007FF9999A0000-memory.dmp

Filesize
64KB

Download
memory/808-115-0x00007FF999990000-0x00007FF9999A0000-memory.dmp

Filesize
64KB

Download
memory/900-179-0x0000000000000000-mapping.dmp

Download
memory/1328-184-0x0000000000000000-mapping.dmp

Download
memory/1328-186-0x0000000004D60000-0x0000000004D65000-memory.dmp

Filesize
20KB

Download
memory/2232-182-0x0000000000000000-mapping.dmp

Download
memory/3468-180-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads