nloader | 68ef8ffa46a0d0ea1a981ad7bcfbaf1c7ad2680ddfac2a2d4b0822a23aaf4247

Resubmissions

13-04-2021 17:48

210413-1qxpj4zbg6 10

13-04-2021 17:27

210413-ba3kbsmv5s 10

Analysis

max time kernel
479s
max time network
391s
platform
windows10_x64
resource
win10v20210408
submitted
13-04-2021 17:48

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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.

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4020	4000	cmd.exe	67

Nloader Payload 1 IoCs

resource	yara_rule
behavioral1/memory/1756-186-0x0000000003460000-0x0000000003465000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

flow	pid	Process
28	1756	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
1756	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

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

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

pid	Process
4000	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4000 wrote to memory of 4020	4000	EXCEL.EXE	80
PID 4000 wrote to memory of 4020	4000	EXCEL.EXE	80
PID 4020 wrote to memory of 1340	4020	cmd.exe	82
PID 4020 wrote to memory of 1340	4020	cmd.exe	82
PID 4020 wrote to memory of 1916	4020	cmd.exe	83
PID 4020 wrote to memory of 1916	4020	cmd.exe	83
PID 1916 wrote to memory of 1756	1916	rundll32.exe	84
PID 1916 wrote to memory of 1756	1916	rundll32.exe	84
PID 1916 wrote to memory of 1756	1916	rundll32.exe	84

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:4000
- 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:4020
- - C:\Windows\system32\certutil.exe
    certutil -decode C:\Users\Public\31927.dpi C:\Users\Public\31927.pdo
    3⤵
    PID:1340
- - C:\Windows\system32\rundll32.exe
    rundll32 C:\Users\Public\31927.pdo,DF1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1916
  - - C:\Windows\SysWOW64\rundll32.exe
      rundll32 C:\Users\Public\31927.pdo,DF1
      4⤵
      Blocklisted process makes network request
      Loads dropped DLL
      PID:1756

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1756-186-0x0000000003460000-0x0000000003465000-memory.dmp

Filesize
20KB

Download
memory/4000-118-0x00007FFA892C0000-0x00007FFA892D0000-memory.dmp

Filesize
64KB

Download
memory/4000-123-0x0000029C4AB40000-0x0000029C4CA35000-memory.dmp

Filesize
31.0MB

Download
memory/4000-122-0x00007FFAA9C90000-0x00007FFAAAD7E000-memory.dmp

Filesize
16.9MB

Download
memory/4000-121-0x00007FFA892C0000-0x00007FFA892D0000-memory.dmp

Filesize
64KB

Download
memory/4000-114-0x00007FF678D60000-0x00007FF67C316000-memory.dmp

Filesize
53.7MB

Download
memory/4000-117-0x00007FFA892C0000-0x00007FFA892D0000-memory.dmp

Filesize
64KB

Download
memory/4000-116-0x00007FFA892C0000-0x00007FFA892D0000-memory.dmp

Filesize
64KB

Download
memory/4000-115-0x00007FFA892C0000-0x00007FFA892D0000-memory.dmp

Filesize
64KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads