nloader | ae6dbc08e0e21b217352175f916cfd5269c4fd8d5de6bff2d0a93a366f78e8d1

General

Target

subscription_1617056233.xlsb
Size

177KB
MD5

1d1ba411ff36cdd1b1350341624ac008
SHA1

becdec14b92c6d67b3aa28fdbf4293dabb7b0055
SHA256

ae6dbc08e0e21b217352175f916cfd5269c4fd8d5de6bff2d0a93a366f78e8d1
SHA512

89a9df6e41300e05c71af3eb45acd7cd6c3915bc511d00cc2a420c5d3a274a704798b3e48e93ffccd7813ee2a25e96a2c1c1f4d1e84ed86c144f2e79af501ef0

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 2 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	492	3560	cmd.exe	67
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1272	3560	rundll32.exe	67

Nloader Payload 1 IoCs

resource	yara_rule
behavioral2/memory/2144-186-0x0000000002A40000-0x0000000002A46000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

flow	pid	Process
23	2144	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2144	rundll32.exe

Checks processor information in registry 2 TTPs 6 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
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 6 IoCs

Query Registry

T1012

System Information Discovery

T1082

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
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 2 IoCs

pid	Process
3560	EXCEL.EXE
1116	EXCEL.EXE

Suspicious use of SetWindowsHookEx 21 IoCs

pid	Process
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
1116	EXCEL.EXE
1116	EXCEL.EXE
1116	EXCEL.EXE
1116	EXCEL.EXE
1116	EXCEL.EXE
1116	EXCEL.EXE
1116	EXCEL.EXE
1116	EXCEL.EXE
1116	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3560 wrote to memory of 492	3560	EXCEL.EXE	75
PID 3560 wrote to memory of 492	3560	EXCEL.EXE	75
PID 492 wrote to memory of 3292	492	cmd.exe	77
PID 492 wrote to memory of 3292	492	cmd.exe	77
PID 3560 wrote to memory of 1272	3560	EXCEL.EXE	82
PID 3560 wrote to memory of 1272	3560	EXCEL.EXE	82
PID 1272 wrote to memory of 2144	1272	rundll32.exe	83
PID 1272 wrote to memory of 2144	1272	rundll32.exe	83
PID 1272 wrote to memory of 2144	1272	rundll32.exe	83

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_1617056233.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3560
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c certutil -decode %PUBLIC%\4123.xsg %PUBLIC%\4123.do1
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:492
- - C:\Windows\system32\certutil.exe
    certutil -decode C:\Users\Public\4123.xsg C:\Users\Public\4123.do1
    3⤵
    PID:3292
- C:\Windows\SYSTEM32\rundll32.exe
  rundll32 C:\Users\Public\4123.do1,DF1
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:1272
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32 C:\Users\Public\4123.do1,DF1
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    PID:2144

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:732

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Public\4123.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1116

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

memory/1116-187-0x00007FF92CFA0000-0x00007FF92CFB0000-memory.dmp

Filesize
64KB

Download
memory/2144-186-0x0000000002A40000-0x0000000002A46000-memory.dmp

Filesize
24KB

Download
memory/3560-123-0x00007FF94B150000-0x00007FF94D045000-memory.dmp

Filesize
31.0MB

Download
memory/3560-121-0x00007FF94D110000-0x00007FF94E1FE000-memory.dmp

Filesize
16.9MB

Download
memory/3560-114-0x00007FF7BB420000-0x00007FF7BE9D6000-memory.dmp

Filesize
53.7MB

Download
memory/3560-122-0x00007FF92CFA0000-0x00007FF92CFB0000-memory.dmp

Filesize
64KB

Download
memory/3560-118-0x00007FF92CFA0000-0x00007FF92CFB0000-memory.dmp

Filesize
64KB

Download
memory/3560-117-0x00007FF92CFA0000-0x00007FF92CFB0000-memory.dmp

Filesize
64KB

Download
memory/3560-115-0x00007FF92CFA0000-0x00007FF92CFB0000-memory.dmp

Filesize
64KB

Download
memory/3560-116-0x00007FF92CFA0000-0x00007FF92CFB0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads