Behavioral Report

Analysis

max time kernel
92s
max time network
137s
platform
windows10_x64
resource
win10v20210410
submitted
13-04-2021 21:04

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Report Files Registry Network Processes Mutex Misc

General

Target

subscription_1617056233.xlsb
Size

177KB
MD5

1d1ba411ff36cdd1b1350341624ac008
SHA1

becdec14b92c6d67b3aa28fdbf4293dabb7b0055
SHA256

ae6dbc08e0e21b217352175f916cfd5269c4fd8d5de6bff2d0a93a366f78e8d1
SHA512

89a9df6e41300e05c71af3eb45acd7cd6c3915bc511d00cc2a420c5d3a274a704798b3e48e93ffccd7813ee2a25e96a2c1c1f4d1e84ed86c144f2e79af501ef0

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 2 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

cmd.exerundll32.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	492	3560	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1272	3560	rundll32.exe	EXCEL.EXE

Nloader Payload 1 IoCs

Processes:

resource yara_rule

behavioral2/memory/2144-186-0x0000000002A40000-0x0000000002A46000-memory.dmp nloader
Blocklisted process makes network request 1 IoCs

Processes:

rundll32.exe

flow pid process

23 2144 rundll32.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

2144 rundll32.exe

resource	yara_rule
behavioral2/memory/2144-186-0x0000000002A40000-0x0000000002A46000-memory.dmp	nloader

flow	pid	process
23	2144	rundll32.exe

pid	process
2144	rundll32.exe

Checks processor information in registry 2 TTPs 6 IoCs

Processor information is often read in order to detect sandboxing environments.

TTPs:

Query Registry System Information Discovery

Processes:

EXCEL.EXEEXCEL.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
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 6 IoCs

TTPs:

Query Registry System Information Discovery

Processes:

EXCEL.EXEEXCEL.EXE

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
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
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 2 IoCs

Processes:

EXCEL.EXEEXCEL.EXE

pid process

3560 EXCEL.EXE
1116 EXCEL.EXE

Suspicious use of SetWindowsHookEx 21 IoCs

Processes:

EXCEL.EXEEXCEL.EXE

pid	process
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
3560	EXCEL.EXE
1116	EXCEL.EXE
1116	EXCEL.EXE
1116	EXCEL.EXE
1116	EXCEL.EXE
1116	EXCEL.EXE
1116	EXCEL.EXE
1116	EXCEL.EXE
1116	EXCEL.EXE
1116	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

EXCEL.EXEcmd.exerundll32.exe

description	pid	process	target process
PID 3560 wrote to memory of 492	3560	EXCEL.EXE	cmd.exe
PID 3560 wrote to memory of 492	3560	EXCEL.EXE	cmd.exe
PID 492 wrote to memory of 3292	492	cmd.exe	certutil.exe
PID 492 wrote to memory of 3292	492	cmd.exe	certutil.exe
PID 3560 wrote to memory of 1272	3560	EXCEL.EXE	rundll32.exe
PID 3560 wrote to memory of 1272	3560	EXCEL.EXE	rundll32.exe
PID 1272 wrote to memory of 2144	1272	rundll32.exe	rundll32.exe
PID 1272 wrote to memory of 2144	1272	rundll32.exe	rundll32.exe
PID 1272 wrote to memory of 2144	1272	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_1617056233.xlsb"

Checks processor information in registry
Enumerates system info in registry
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory

PID:3560

C:\Windows\SYSTEM32\cmd.exe

cmd.exe /c certutil -decode %PUBLIC%\4123.xsg %PUBLIC%\4123.do1

Process spawned unexpected child process
Suspicious use of WriteProcessMemory

PID:492

C:\Windows\system32\certutil.exe

certutil -decode C:\Users\Public\4123.xsg C:\Users\Public\4123.do1

PID:3292

C:\Windows\SYSTEM32\rundll32.exe

rundll32 C:\Users\Public\4123.do1,DF1

Process spawned unexpected child process
Suspicious use of WriteProcessMemory

PID:1272

C:\Windows\SysWOW64\rundll32.exe

rundll32 C:\Users\Public\4123.do1,DF1

Blocklisted process makes network request
Loads dropped DLL

PID:2144

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding

PID:732

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE

"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Public\4123.xlsb"

Checks processor information in registry
Enumerates system info in registry
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx

PID:1116

Network

MITRE ATT&CK Matrix

Collection

Command and Control

Credential Access

Defense Evasion

Discovery

Query Registry

T1012

System Information Discovery

T1082

Execution

Exfiltration

Impact

Initial Access

Lateral Movement

Persistence

Privilege Escalation

Replay Monitor

00:00 00:00

Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\WebServiceCache\AllUsers\officeclient.microsoft.com\736E845A-8550-4CB9-AF37-A1C47A5167DD
MD5
5329f8922c5731174a51b688e3c41764

SHA1
70f0b53f34dff30e40817f8aaa34b83df677af06

SHA256
7840fc7857ca62525be17dc748a6cec781eeb5240ca54a27db91c75243cebe15

SHA512
5289ee31a7c385fe293402e4dc6dfb01172c0c85e6f2d2967a89dc449f21cbdd415eabf6368b7e902ad5ca25e8169abf92bdcc23497aee6d9d3721bf76e62689

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
MD5
3a0398bcb722bc90474aeea0089705a3

SHA1
6920a22411dc4b9fbe5efc76bb6c2a53bde7deec

SHA256
d4aafc857f0e2b75a5bb2c1628a6dd0d1e0fec48b7cf8c40ce915b803c4b70ea

SHA512
4c303cc880cb73261b31d6243f99a6cd1280a4f3a31eae701c6b86fd99d1fa4004d4580267f511454da2c3c27fbd0510d0034184cc7ad7e1dde810ce48165798

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Office\OTele\excel.exe.db
MD5
a6064fc9ce640751e063d9af443990da

SHA1
367a3a7d57bfb3e9a6ec356dfc411a5f14dfde2a

SHA256
5f72c11fd2fa88d8b8bfae1214551f8d5ee07b8895df824fa717ebbcec118a6c

SHA512
0e42dd8e341e2334eda1e19e1a344475ed3a0539a21c70ba2247f480c706ab8e2ff6dbeb790614cbde9fb547699b24e69c85c54e99ed77a08fe7e1d1b4b488d0

Download Submit
C:\Users\Public\4123.do1
MD5
f776deb4df137b37dcae5406c8f3a07a

SHA1
f6a31b594fca39c118927405fa4d14353b8fd49a

SHA256
93cc5e6a6b671d9b0124ade32ae8b09269de9f03c5c5e66347fbfc7a8c3b305e

SHA512
4077b4214b4683bb4776d470027e61fcc3cb3e78beb9377674e4a4de9115d52911e39cb29a566ab446c6962a252ce01020ffd616b5854a9d8230414262bfafe2

Download Submit
C:\Users\Public\4123.xlsb
MD5
c87e1dee1275fed1f7ee813b97ccb17b

SHA1
e8313978e3c0dff6355b843cd470949c719032c6

SHA256
92bb3324b68e8780d718ed808cb9633dc1ef1f7988d2b85cc0f9f431ed63a63d

SHA512
2d2177413ed0767651789363c2b952ff8fba26de6ebb84a6390af6bc87927577bedf08b802f5bd6e937e7462bddbd707100108ccf6ef4f39ded65bdcb8b40f35

Download Submit
C:\Users\Public\4123.xsg
MD5
c87e1dee1275fed1f7ee813b97ccb17b

SHA1
e8313978e3c0dff6355b843cd470949c719032c6

SHA256
92bb3324b68e8780d718ed808cb9633dc1ef1f7988d2b85cc0f9f431ed63a63d

SHA512
2d2177413ed0767651789363c2b952ff8fba26de6ebb84a6390af6bc87927577bedf08b802f5bd6e937e7462bddbd707100108ccf6ef4f39ded65bdcb8b40f35

Download Submit
\Users\Public\4123.do1
MD5
f776deb4df137b37dcae5406c8f3a07a

SHA1
f6a31b594fca39c118927405fa4d14353b8fd49a

SHA256
93cc5e6a6b671d9b0124ade32ae8b09269de9f03c5c5e66347fbfc7a8c3b305e

SHA512
4077b4214b4683bb4776d470027e61fcc3cb3e78beb9377674e4a4de9115d52911e39cb29a566ab446c6962a252ce01020ffd616b5854a9d8230414262bfafe2

Download Submit
memory/492-179-0x0000000000000000-mapping.dmp

Download
memory/1116-187-0x00007FF92CFA0000-0x00007FF92CFB0000-memory.dmp

Filesize
64KB

Download
memory/1272-182-0x0000000000000000-mapping.dmp

Download
memory/2144-186-0x0000000002A40000-0x0000000002A46000-memory.dmp

Filesize
24KB

Download
memory/2144-184-0x0000000000000000-mapping.dmp

Download
memory/3292-180-0x0000000000000000-mapping.dmp

Download
memory/3560-123-0x00007FF94B150000-0x00007FF94D045000-memory.dmp

Filesize
30MB

Download
memory/3560-121-0x00007FF94D110000-0x00007FF94E1FE000-memory.dmp

Filesize
16MB

Download
memory/3560-114-0x00007FF7BB420000-0x00007FF7BE9D6000-memory.dmp

Filesize
53MB

Download
memory/3560-122-0x00007FF92CFA0000-0x00007FF92CFB0000-memory.dmp

Filesize
64KB

Download
memory/3560-118-0x00007FF92CFA0000-0x00007FF92CFB0000-memory.dmp

Filesize
64KB

Download
memory/3560-117-0x00007FF92CFA0000-0x00007FF92CFB0000-memory.dmp

Filesize
64KB

Download
memory/3560-115-0x00007FF92CFA0000-0x00007FF92CFB0000-memory.dmp

Filesize
64KB

Download
memory/3560-116-0x00007FF92CFA0000-0x00007FF92CFB0000-memory.dmp

Filesize
64KB

Download