nloader | 3cc4948d4d3cac89a74284ae4dc49d177b834f295e9f767a46dcd73726b7239d

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.

Processes:

cmd.exe

description	pid	pid_target	Process	procid_target
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	400	1080	cmd.exe	24

Nloader Payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1596-73-0x00000000001A0000-0x00000000001A5000-memory.dmp	nloader

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid	Process
1596	rundll32.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid	pid_target	Process	procid_target
316	1596	WerFault.exe	35

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

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

Processes:

EXCEL.EXE

description	ioc	Process
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
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
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
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\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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid	Process
1080	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

WerFault.exe

pid	Process
316	WerFault.exe
316	WerFault.exe
316	WerFault.exe
316	WerFault.exe
316	WerFault.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WerFault.exe

description	pid	Process
Token: SeDebugPrivilege	316	WerFault.exe

Suspicious use of SetWindowsHookEx 5 IoCs

Processes:

EXCEL.EXE

pid	Process
1080	EXCEL.EXE
1080	EXCEL.EXE
1080	EXCEL.EXE
1080	EXCEL.EXE
1080	EXCEL.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

EXCEL.EXEcmd.exerundll32.exe

description	pid	Process	procid_target
PID 1080 wrote to memory of 784	1080	EXCEL.EXE	29
PID 1080 wrote to memory of 784	1080	EXCEL.EXE	29
PID 1080 wrote to memory of 784	1080	EXCEL.EXE	29
PID 1080 wrote to memory of 784	1080	EXCEL.EXE	29
PID 1080 wrote to memory of 400	1080	EXCEL.EXE	31
PID 1080 wrote to memory of 400	1080	EXCEL.EXE	31
PID 1080 wrote to memory of 400	1080	EXCEL.EXE	31
PID 1080 wrote to memory of 400	1080	EXCEL.EXE	31
PID 400 wrote to memory of 2000	400	cmd.exe	33
PID 400 wrote to memory of 2000	400	cmd.exe	33
PID 400 wrote to memory of 2000	400	cmd.exe	33
PID 400 wrote to memory of 2000	400	cmd.exe	33
PID 400 wrote to memory of 1596	400	cmd.exe	35
PID 400 wrote to memory of 1596	400	cmd.exe	35
PID 400 wrote to memory of 1596	400	cmd.exe	35
PID 400 wrote to memory of 1596	400	cmd.exe	35
PID 400 wrote to memory of 1596	400	cmd.exe	35
PID 400 wrote to memory of 1596	400	cmd.exe	35
PID 400 wrote to memory of 1596	400	cmd.exe	35
PID 1596 wrote to memory of 316	1596	rundll32.exe	36
PID 1596 wrote to memory of 316	1596	rundll32.exe	36
PID 1596 wrote to memory of 316	1596	rundll32.exe	36
PID 1596 wrote to memory of 316	1596	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:1080
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:784
- 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:400
- - C:\Windows\SysWOW64\certutil.exe
    certutil -decode C:\Users\Public\4802545.xs1 C:\Users\Public\4802545.xs2
    3⤵
    PID:2000
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32 C:\Users\Public\4802545.xs2,DF1
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:1596
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1596 -s 436
      4⤵
      Program crash
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:316

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

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Downloads

C:\Users\Public\4802545.xs1

MD5
e3c91eeeec07ed08ff35991cd1f8926d

SHA1
7f4b8b7a2968977de612be4938e4d2563b388884

SHA256
975509717b69e7c6dc7e20ac3421f710591df6b8b08f1fd93b042e44403db0b9

SHA512
389f20e6f01a0a6707ad2aadce542612b3fbefeb7a586d140a471f765c84a1ec55ae19f1c4bef8d353881e1fdb16f2ae33cd9cfb3aae342f10628e54b51246da

Download Submit
C:\Users\Public\4802545.xs2

MD5
cfb94c893280fd1edd40a4c74031727a

SHA1
9bf1f365e14842621854282f976b890478816a77

SHA256
3205ebcea1f138f0171ff3815d594883805b4af48a24bc0d6228d0b0ee12ddb4

SHA512
31b573054e5963c939cab24b48a8610f757ea94eba21c5101f2df3ffd8fc3120327795692feda7d448091a93b4befb389eed48e17662d7f2e3b19cc441a56988

Download Submit
\Users\Public\4802545.xs2

MD5
cfb94c893280fd1edd40a4c74031727a

SHA1
9bf1f365e14842621854282f976b890478816a77

SHA256
3205ebcea1f138f0171ff3815d594883805b4af48a24bc0d6228d0b0ee12ddb4

SHA512
31b573054e5963c939cab24b48a8610f757ea94eba21c5101f2df3ffd8fc3120327795692feda7d448091a93b4befb389eed48e17662d7f2e3b19cc441a56988

Download Submit
memory/316-76-0x0000000000260000-0x00000000002C0000-memory.dmp

Filesize
384KB

Download
memory/316-75-0x0000000000000000-mapping.dmp

Download
memory/400-65-0x0000000000000000-mapping.dmp

Download
memory/784-64-0x000007FEFBAA1000-0x000007FEFBAA3000-memory.dmp

Filesize
8KB

Download
memory/784-63-0x0000000000000000-mapping.dmp

Download
memory/1080-60-0x000000002F781000-0x000000002F784000-memory.dmp

Filesize
12KB

Download
memory/1080-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1080-61-0x0000000071351000-0x0000000071353000-memory.dmp

Filesize
8KB

Download
memory/1080-77-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1596-69-0x0000000000000000-mapping.dmp

Download
memory/1596-73-0x00000000001A0000-0x00000000001A5000-memory.dmp

Filesize
20KB

Download
memory/2000-67-0x0000000075AF1000-0x0000000075AF3000-memory.dmp

Filesize
8KB

Download
memory/2000-66-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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