nloader | 68ef8ffa46a0d0ea1a981ad7bcfbaf1c7ad2680ddfac2a2d4b0822a23aaf4247

General

Target

subscription_1618334083.xlsb
Size

182KB
MD5

9d8889711256df5fba21cac45ff2be6e
SHA1

72c600faaaf2168a46922b101589dff2c3579264
SHA256

68ef8ffa46a0d0ea1a981ad7bcfbaf1c7ad2680ddfac2a2d4b0822a23aaf4247
SHA512

7e1874bbae50d15de0b0dece24f0122ec473f1d3ea0f21ba47b25dd941fe2512800fef54047752f8f5808db586c75ef73e770d6b4b4c67aded4613979074cca7

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	1780	3256	cmd.exe	EXCEL.EXE

Nloader Payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3636-186-0x0000000002B50000-0x0000000002B55000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

Processes:

rundll32.exe

flow pid process

26 3636 rundll32.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

3636 rundll32.exe

flow	pid	process
26	3636	rundll32.exe

pid	process
3636	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\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

3256 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
3256	EXCEL.EXE
3256	EXCEL.EXE
3256	EXCEL.EXE
3256	EXCEL.EXE
3256	EXCEL.EXE
3256	EXCEL.EXE
3256	EXCEL.EXE
3256	EXCEL.EXE
3256	EXCEL.EXE
3256	EXCEL.EXE
3256	EXCEL.EXE
3256	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

EXCEL.EXEcmd.exerundll32.exe

description	pid	process	target process
PID 3256 wrote to memory of 1780	3256	EXCEL.EXE	cmd.exe
PID 3256 wrote to memory of 1780	3256	EXCEL.EXE	cmd.exe
PID 1780 wrote to memory of 3424	1780	cmd.exe	certutil.exe
PID 1780 wrote to memory of 3424	1780	cmd.exe	certutil.exe
PID 1780 wrote to memory of 1704	1780	cmd.exe	rundll32.exe
PID 1780 wrote to memory of 1704	1780	cmd.exe	rundll32.exe
PID 1704 wrote to memory of 3636	1704	rundll32.exe	rundll32.exe
PID 1704 wrote to memory of 3636	1704	rundll32.exe	rundll32.exe
PID 1704 wrote to memory of 3636	1704	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_1618334083.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3256

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:1780

C:\Windows\system32\certutil.exe
certutil -decode C:\Users\Public\31927.dpi C:\Users\Public\31927.pdo
3⤵
PID:3424

C:\Windows\system32\rundll32.exe
rundll32 C:\Users\Public\31927.pdo,DF1
3⤵
- Suspicious use of WriteProcessMemory
PID:1704

C:\Windows\SysWOW64\rundll32.exe
rundll32 C:\Users\Public\31927.pdo,DF1
4⤵
- Blocklisted process makes network request
- Loads dropped DLL
PID:3636

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/1704-182-0x0000000000000000-mapping.dmp

Download
memory/1780-179-0x0000000000000000-mapping.dmp

Download
memory/3256-121-0x00007FFCBABC0000-0x00007FFCBABD0000-memory.dmp

Filesize
64KB

Download
memory/3256-122-0x00007FFCDB5E0000-0x00007FFCDC6CE000-memory.dmp

Filesize
16.9MB

Download
memory/3256-123-0x00007FFCD9620000-0x00007FFCDB515000-memory.dmp

Filesize
31.0MB

Download
memory/3256-114-0x00007FF658820000-0x00007FF65BDD6000-memory.dmp

Filesize
53.7MB

Download
memory/3256-118-0x00007FFCBABC0000-0x00007FFCBABD0000-memory.dmp

Filesize
64KB

Download
memory/3256-117-0x00007FFCBABC0000-0x00007FFCBABD0000-memory.dmp

Filesize
64KB

Download
memory/3256-116-0x00007FFCBABC0000-0x00007FFCBABD0000-memory.dmp

Filesize
64KB

Download
memory/3256-115-0x00007FFCBABC0000-0x00007FFCBABD0000-memory.dmp

Filesize
64KB

Download
memory/3424-180-0x0000000000000000-mapping.dmp

Download
memory/3636-184-0x0000000000000000-mapping.dmp

Download
memory/3636-186-0x0000000002B50000-0x0000000002B55000-memory.dmp

Filesize
20KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads