nloader | aae2cf00546070edda9898e8439236bb06001d46d2649d8a859a5952bb5229dd

General

Target

subscription_number.xlsb
Size

254KB
MD5

31db3473a93ac2831bd895b0d83154ec
SHA1

aaef0d7e0bd4094c0ecbc19c69cc85954f209820
SHA256

aae2cf00546070edda9898e8439236bb06001d46d2649d8a859a5952bb5229dd
SHA512

4a101bb696343a2ffc89834b366d411e0398ed2f06091bbbb32fe1caa3ec39e3ac95782a2235ccff3bafa8c1801b09616921cb228fe7eb3f6c253b20db138a65

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	2176	3876	cmd.exe	68

Nloader Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3948-186-0x0000000003610000-0x0000000003616000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

flow	pid	Process
32	3948	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
3948	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 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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3876	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3876	EXCEL.EXE
3876	EXCEL.EXE
3876	EXCEL.EXE
3876	EXCEL.EXE
3876	EXCEL.EXE
3876	EXCEL.EXE
3876	EXCEL.EXE
3876	EXCEL.EXE
3876	EXCEL.EXE
3876	EXCEL.EXE
3876	EXCEL.EXE
3876	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3876 wrote to memory of 2176	3876	EXCEL.EXE	79
PID 3876 wrote to memory of 2176	3876	EXCEL.EXE	79
PID 2176 wrote to memory of 2512	2176	cmd.exe	81
PID 2176 wrote to memory of 2512	2176	cmd.exe	81
PID 2176 wrote to memory of 2192	2176	cmd.exe	82
PID 2176 wrote to memory of 2192	2176	cmd.exe	82
PID 2192 wrote to memory of 3948	2192	rundll32.exe	83
PID 2192 wrote to memory of 3948	2192	rundll32.exe	83
PID 2192 wrote to memory of 3948	2192	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_number.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3876
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c certutil -decode %PUBLIC%\130486.dot %PUBLIC%\130486.pgj && rundll32 %PUBLIC%\130486.pgj,DF1
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:2176
- - C:\Windows\system32\certutil.exe
    certutil -decode C:\Users\Public\130486.dot C:\Users\Public\130486.pgj
    3⤵
    PID:2512
- - C:\Windows\system32\rundll32.exe
    rundll32 C:\Users\Public\130486.pgj,DF1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2192
  - - C:\Windows\SysWOW64\rundll32.exe
      rundll32 C:\Users\Public\130486.pgj,DF1
      4⤵
      Blocklisted process makes network request
      Loads dropped DLL
      PID:3948

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/3876-118-0x00007FFDDC160000-0x00007FFDDC170000-memory.dmp

Filesize
64KB

Download
memory/3876-121-0x00007FFDDC160000-0x00007FFDDC170000-memory.dmp

Filesize
64KB

Download
memory/3876-122-0x00007FFDFC870000-0x00007FFDFD95E000-memory.dmp

Filesize
16.9MB

Download
memory/3876-123-0x00007FFDFA8B0000-0x00007FFDFC7A5000-memory.dmp

Filesize
31.0MB

Download
memory/3876-114-0x00007FF797170000-0x00007FF79A726000-memory.dmp

Filesize
53.7MB

Download
memory/3876-117-0x00007FFDDC160000-0x00007FFDDC170000-memory.dmp

Filesize
64KB

Download
memory/3876-116-0x00007FFDDC160000-0x00007FFDDC170000-memory.dmp

Filesize
64KB

Download
memory/3876-115-0x00007FFDDC160000-0x00007FFDDC170000-memory.dmp

Filesize
64KB

Download
memory/3948-186-0x0000000003610000-0x0000000003616000-memory.dmp

Filesize
24KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads