nloader | aae2cf00546070edda9898e8439236bb06001d46d2649d8a859a5952bb5229dd

General

Target

subscription_number.xlsb
Size

254KB
MD5

31db3473a93ac2831bd895b0d83154ec
SHA1

aaef0d7e0bd4094c0ecbc19c69cc85954f209820
SHA256

aae2cf00546070edda9898e8439236bb06001d46d2649d8a859a5952bb5229dd
SHA512

4a101bb696343a2ffc89834b366d411e0398ed2f06091bbbb32fe1caa3ec39e3ac95782a2235ccff3bafa8c1801b09616921cb228fe7eb3f6c253b20db138a65

Score

10^/10

nloader loader

Malware Config

Extracted

Language

xlm4.0

Source

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 (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	112	1092	cmd.exe	24

Nloader Payload 4 IoCs

resource	yara_rule
behavioral1/memory/1332-70-0x00000000001D0000-0x00000000001D9000-memory.dmp	nloader
behavioral1/memory/1332-73-0x00000000001E0000-0x00000000001E7000-memory.dmp	nloader
behavioral1/memory/1332-76-0x0000000000210000-0x0000000000215000-memory.dmp	nloader
behavioral1/memory/1332-78-0x00000000001C0000-0x00000000001C6000-memory.dmp	nloader

Blocklisted process makes network request 1 IoCs

flow	pid	Process
4	1332	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
1332	rundll32.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1092	EXCEL.EXE

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1092	EXCEL.EXE
1092	EXCEL.EXE
1092	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1092 wrote to memory of 112	1092	EXCEL.EXE	30
PID 1092 wrote to memory of 112	1092	EXCEL.EXE	30
PID 1092 wrote to memory of 112	1092	EXCEL.EXE	30
PID 1092 wrote to memory of 112	1092	EXCEL.EXE	30
PID 112 wrote to memory of 560	112	cmd.exe	32
PID 112 wrote to memory of 560	112	cmd.exe	32
PID 112 wrote to memory of 560	112	cmd.exe	32
PID 112 wrote to memory of 560	112	cmd.exe	32
PID 112 wrote to memory of 1332	112	cmd.exe	33
PID 112 wrote to memory of 1332	112	cmd.exe	33
PID 112 wrote to memory of 1332	112	cmd.exe	33
PID 112 wrote to memory of 1332	112	cmd.exe	33
PID 112 wrote to memory of 1332	112	cmd.exe	33
PID 112 wrote to memory of 1332	112	cmd.exe	33
PID 112 wrote to memory of 1332	112	cmd.exe	33

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\subscription_number.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1092
- C:\Windows\SysWOW64\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:112
- - C:\Windows\SysWOW64\certutil.exe
    certutil -decode C:\Users\Public\130486.dot C:\Users\Public\130486.pgj
    3⤵
    PID:560
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32 C:\Users\Public\130486.pgj,DF1
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    PID:1332

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/560-64-0x00000000757D1000-0x00000000757D3000-memory.dmp

Filesize
8KB

Download
memory/1092-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1092-60-0x00000000715A1000-0x00000000715A3000-memory.dmp

Filesize
8KB

Download
memory/1092-59-0x000000002F9E1000-0x000000002F9E4000-memory.dmp

Filesize
12KB

Download
memory/1332-70-0x00000000001D0000-0x00000000001D9000-memory.dmp

Filesize
36KB

Download
memory/1332-73-0x00000000001E0000-0x00000000001E7000-memory.dmp

Filesize
28KB

Download
memory/1332-75-0x00000000001E3000-0x00000000001E4000-memory.dmp

Filesize
4KB

Download
memory/1332-76-0x0000000000210000-0x0000000000215000-memory.dmp

Filesize
20KB

Download
memory/1332-78-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download

Analysis

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