nloader | 720ac949e6743c94b40a02c010489f57696122431ccd4d9ab7a3eee00b8f7a77

General

Target

B06CO4I2G0u642m5Gi6R.xlsb
Size

327KB
MD5

11ae52bd9c6a338582892d1a0e565269
SHA1

3b29f297c2abe8208da5071724db6361348d0d17
SHA256

720ac949e6743c94b40a02c010489f57696122431ccd4d9ab7a3eee00b8f7a77
SHA512

af8b710f2ef8b0edc2b97930cbc703bb08497c961b34357fb0b6895108de16e53d3fe936357cea2fc907c444256868ec71b5959c6bd933d60bb07053a094b4d7

Score

10^/10

nloader loader upx

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	1844	1456	cmd.exe	EXCEL.EXE

ACProtect 1.3x - 1.4x DLL software 2 IoCs

Detects file using ACProtect software.

Processes:

resource	yara_rule
C:\Users\Public\42237.h5	acprotect
\Users\Public\42237.h5	acprotect

Nloader Payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1244-186-0x0000000010000000-0x0000000010005000-memory.dmp	nloader

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
C:\Users\Public\42237.h5	upx
\Users\Public\42237.h5	upx

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

1244 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

4168 1244 WerFault.exe rundll32.exe

pid	process
1244	rundll32.exe

pid	pid_target	process	target process
4168	1244	WerFault.exe	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 opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1456 EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 16 IoCs

Processes:

WerFault.exe

pid	process
4168	WerFault.exe
4168	WerFault.exe
4168	WerFault.exe
4168	WerFault.exe
4168	WerFault.exe
4168	WerFault.exe
4168	WerFault.exe
4168	WerFault.exe
4168	WerFault.exe
4168	WerFault.exe
4168	WerFault.exe
4168	WerFault.exe
4168	WerFault.exe
4168	WerFault.exe
4168	WerFault.exe
4168	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

WerFault.exe

description pid process

Token: SeRestorePrivilege 4168 WerFault.exe
Token: SeBackupPrivilege 4168 WerFault.exe
Token: SeDebugPrivilege 4168 WerFault.exe

description	pid	process
Token: SeRestorePrivilege	4168	WerFault.exe
Token: SeBackupPrivilege	4168	WerFault.exe
Token: SeDebugPrivilege	4168	WerFault.exe

Suspicious use of SetWindowsHookEx 17 IoCs

Processes:

EXCEL.EXE

pid	process
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

EXCEL.EXEcmd.exerundll32.exe

description	pid	process	target process
PID 1456 wrote to memory of 1844	1456	EXCEL.EXE	cmd.exe
PID 1456 wrote to memory of 1844	1456	EXCEL.EXE	cmd.exe
PID 1844 wrote to memory of 2840	1844	cmd.exe	certutil.exe
PID 1844 wrote to memory of 2840	1844	cmd.exe	certutil.exe
PID 1844 wrote to memory of 2300	1844	cmd.exe	rundll32.exe
PID 1844 wrote to memory of 2300	1844	cmd.exe	rundll32.exe
PID 2300 wrote to memory of 1244	2300	rundll32.exe	rundll32.exe
PID 2300 wrote to memory of 1244	2300	rundll32.exe	rundll32.exe
PID 2300 wrote to memory of 1244	2300	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\B06CO4I2G0u642m5Gi6R.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1456

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c certutil -f -decode C:\Users\Public\42237.j56 C:\Users\Public\42237.h5 && rundll32 C:\Users\Public\42237.h5,DF
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:1844

C:\Windows\system32\certutil.exe
certutil -f -decode C:\Users\Public\42237.j56 C:\Users\Public\42237.h5
3⤵
PID:2840

C:\Windows\system32\rundll32.exe
rundll32 C:\Users\Public\42237.h5,DF
3⤵
- Suspicious use of WriteProcessMemory
PID:2300

C:\Windows\SysWOW64\rundll32.exe
rundll32 C:\Users\Public\42237.h5,DF
4⤵
- Loads dropped DLL
PID:1244

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1244 -s 792
5⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4168

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

C:\Users\Public\42237.h5

MD5
b1db6f12dae0139b05a71ca223c63429

SHA1
7d7d27472d97ee575b04b51eb18395962ae97364

SHA256
80b174138e23b10108ec867bc7e8b3103f4de991f46120d9045d81cc66c9b9f6

SHA512
27cfd414e78d09836922c421b7f2d190e43210b4b95cf49c2ebac092b089ab0ec97be1a9424c4237091726a2653c6063e84300d456ce08fd6de5bcd6ded6b890

Download Submit
C:\Users\Public\42237.j56

MD5
f4aa389ce27da606fce35c19a3f59b93

SHA1
4424a1c07bde275caafed45ba0452ddc3cbc39c4

SHA256
2eeb1b3360a8749d9093214ec36219d74dbb678459094af580a192c5e52162aa

SHA512
e45fa17d6d957add2eb543b8bb5f17f50c6f118a8a5c19dabbb29a0069c70c1c5ab6f27ab0fa8e41feb4482f486d885ac15e981e8db596217bb79d580de51bdc

Download Submit
\Users\Public\42237.h5

MD5
b1db6f12dae0139b05a71ca223c63429

SHA1
7d7d27472d97ee575b04b51eb18395962ae97364

SHA256
80b174138e23b10108ec867bc7e8b3103f4de991f46120d9045d81cc66c9b9f6

SHA512
27cfd414e78d09836922c421b7f2d190e43210b4b95cf49c2ebac092b089ab0ec97be1a9424c4237091726a2653c6063e84300d456ce08fd6de5bcd6ded6b890

Download Submit
memory/1244-186-0x0000000010000000-0x0000000010005000-memory.dmp

Filesize
20KB

Download
memory/1244-184-0x0000000000000000-mapping.dmp

Download
memory/1456-118-0x00007FF882460000-0x00007FF882470000-memory.dmp

Filesize
64KB

Download
memory/1456-122-0x00007FF8A2A90000-0x00007FF8A3B7E000-memory.dmp

Filesize
16.9MB

Download
memory/1456-123-0x00007FF8A0B90000-0x00007FF8A2A85000-memory.dmp

Filesize
31.0MB

Download
memory/1456-121-0x00007FF882460000-0x00007FF882470000-memory.dmp

Filesize
64KB

Download
memory/1456-114-0x00007FF6DFAC0000-0x00007FF6E3076000-memory.dmp

Filesize
53.7MB

Download
memory/1456-117-0x00007FF882460000-0x00007FF882470000-memory.dmp

Filesize
64KB

Download
memory/1456-116-0x00007FF882460000-0x00007FF882470000-memory.dmp

Filesize
64KB

Download
memory/1456-115-0x00007FF882460000-0x00007FF882470000-memory.dmp

Filesize
64KB

Download
memory/1844-179-0x0000000000000000-mapping.dmp

Download
memory/2300-182-0x0000000000000000-mapping.dmp

Download
memory/2840-180-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads