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.

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	2176	3876	cmd.exe	EXCEL.EXE

Nloader Payload 1 IoCs

Processes:

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

Blocklisted process makes network request 1 IoCs

Processes:

rundll32.exe

flow pid process

32 3948 rundll32.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

3948 rundll32.exe

flow	pid	process
32	3948	rundll32.exe

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

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 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

Processes:

EXCEL.EXE

pid process

3876 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

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

Processes:

EXCEL.EXEcmd.exerundll32.exe

description	pid	process	target process
PID 3876 wrote to memory of 2176	3876	EXCEL.EXE	cmd.exe
PID 3876 wrote to memory of 2176	3876	EXCEL.EXE	cmd.exe
PID 2176 wrote to memory of 2512	2176	cmd.exe	certutil.exe
PID 2176 wrote to memory of 2512	2176	cmd.exe	certutil.exe
PID 2176 wrote to memory of 2192	2176	cmd.exe	rundll32.exe
PID 2176 wrote to memory of 2192	2176	cmd.exe	rundll32.exe
PID 2192 wrote to memory of 3948	2192	rundll32.exe	rundll32.exe
PID 2192 wrote to memory of 3948	2192	rundll32.exe	rundll32.exe
PID 2192 wrote to memory of 3948	2192	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_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

Replay Monitor

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Downloads

C:\Users\Public\130486.dot

MD5
5ad4845793b5dc3308172b39f3c3dbc7

SHA1
4285a93ec1a49f28cb2542af2a2bafc08e4f8a18

SHA256
2632c0cc222a6d436b50a418605a7bd4fa8f363ab8d93d10b831cdb28a2ac1bc

SHA512
4a1c88eb99d9d9713802f5f2c9b96d15bb4cab8af7360c62d3e1b614fe07ea33771b33075c15a0f400daad7a713edc684e2c0566cd9ab5805b00f05e3b58a5df

Download Submit
C:\Users\Public\130486.pgj

MD5
14089c2d5a4207dd80f71fb258200848

SHA1
80fa3d47f321108d7c956680ac1b1f5c611d6277

SHA256
f3b5cf1e40aed4567a8996cf107285907d432b4bc8cc3d0b46aae628813d82d4

SHA512
cbfcbcddb80749711853aa7d39525e299015d31451615cfce64e54f197d6a1e87deb60920723c7a90b30c0da05e469c4208a758e93ad2e49f9e78eefb231bfa6

Download Submit
\Users\Public\130486.pgj

MD5
14089c2d5a4207dd80f71fb258200848

SHA1
80fa3d47f321108d7c956680ac1b1f5c611d6277

SHA256
f3b5cf1e40aed4567a8996cf107285907d432b4bc8cc3d0b46aae628813d82d4

SHA512
cbfcbcddb80749711853aa7d39525e299015d31451615cfce64e54f197d6a1e87deb60920723c7a90b30c0da05e469c4208a758e93ad2e49f9e78eefb231bfa6

Download Submit
memory/2176-179-0x0000000000000000-mapping.dmp

Download
memory/2192-182-0x0000000000000000-mapping.dmp

Download
memory/2512-180-0x0000000000000000-mapping.dmp

Download
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/3948-184-0x0000000000000000-mapping.dmp

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