nloader | 2abe5df892b139bb3f88019ac0f5b2856c6dd853362dc2f723292fe8d33619c1

General

Target

cancel_sub_JPL12345678901234.xlsb
Size

241KB
MD5

b4a0b38ff2bd7619e42c0f1d1fb0171b
SHA1

c0e61bcc7139bc2342e5a9eb9a2bc056c475624d
SHA256

3cc4948d4d3cac89a74284ae4dc49d177b834f295e9f767a46dcd73726b7239d
SHA512

8830468a4f8ee1032abe7ede05fdc11fb592355c81447bf0d65b995a6d6a55fc399025084bb74bb7f4b52a14ee7a2ea79a2100480222c1da95e19b3b4a59cff5

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	1144	1972	cmd.exe	24

Nloader Payload 1 IoCs

resource	yara_rule
behavioral1/memory/864-72-0x00000000000B0000-0x00000000000B5000-memory.dmp	nloader

Loads dropped DLL 1 IoCs

pid	Process
864	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
680	864	WerFault.exe	34

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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1972	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
680	WerFault.exe
680	WerFault.exe
680	WerFault.exe
680	WerFault.exe
680	WerFault.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
680	WerFault.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	680	WerFault.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
1972	EXCEL.EXE
1972	EXCEL.EXE
1972	EXCEL.EXE
1972	EXCEL.EXE
1972	EXCEL.EXE

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 1792	1972	EXCEL.EXE	26
PID 1972 wrote to memory of 1792	1972	EXCEL.EXE	26
PID 1972 wrote to memory of 1792	1972	EXCEL.EXE	26
PID 1972 wrote to memory of 1792	1972	EXCEL.EXE	26
PID 1972 wrote to memory of 1144	1972	EXCEL.EXE	31
PID 1972 wrote to memory of 1144	1972	EXCEL.EXE	31
PID 1972 wrote to memory of 1144	1972	EXCEL.EXE	31
PID 1972 wrote to memory of 1144	1972	EXCEL.EXE	31
PID 1144 wrote to memory of 1812	1144	cmd.exe	33
PID 1144 wrote to memory of 1812	1144	cmd.exe	33
PID 1144 wrote to memory of 1812	1144	cmd.exe	33
PID 1144 wrote to memory of 1812	1144	cmd.exe	33
PID 1144 wrote to memory of 864	1144	cmd.exe	34
PID 1144 wrote to memory of 864	1144	cmd.exe	34
PID 1144 wrote to memory of 864	1144	cmd.exe	34
PID 1144 wrote to memory of 864	1144	cmd.exe	34
PID 1144 wrote to memory of 864	1144	cmd.exe	34
PID 1144 wrote to memory of 864	1144	cmd.exe	34
PID 1144 wrote to memory of 864	1144	cmd.exe	34
PID 864 wrote to memory of 680	864	rundll32.exe	36
PID 864 wrote to memory of 680	864	rundll32.exe	36
PID 864 wrote to memory of 680	864	rundll32.exe	36
PID 864 wrote to memory of 680	864	rundll32.exe	36

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\cancel_sub_JPL12345678901234.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:1792
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c certutil -decode C:\Users\Public\4802545.xs1 C:\Users\Public\4802545.xs2 && rundll32 C:\Users\Public\4802545.xs2,DF1
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:1144
- - C:\Windows\SysWOW64\certutil.exe
    certutil -decode C:\Users\Public\4802545.xs1 C:\Users\Public\4802545.xs2
    3⤵
    PID:1812
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32 C:\Users\Public\4802545.xs2,DF1
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:864
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 864 -s 436
      4⤵
      Program crash
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of AdjustPrivilegeToken
      PID:680

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/680-75-0x0000000000400000-0x0000000000401000-memory.dmp

Filesize
4KB

Download
memory/864-72-0x00000000000B0000-0x00000000000B5000-memory.dmp

Filesize
20KB

Download
memory/1792-63-0x000007FEFC1D1000-0x000007FEFC1D3000-memory.dmp

Filesize
8KB

Download
memory/1812-66-0x0000000075DA1000-0x0000000075DA3000-memory.dmp

Filesize
8KB

Download
memory/1972-59-0x000000002FCC1000-0x000000002FCC4000-memory.dmp

Filesize
12KB

Download
memory/1972-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1972-60-0x0000000071AB1000-0x0000000071AB3000-memory.dmp

Filesize
8KB

Download

Analysis

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