xloader | 033372113246279f04ccac1fab6748a2bfd2ed9b9c5cb980534f444dac558af8

General

Target

09090.xlsx
Size

269KB
MD5

6fde5f271c363c8c6958c79a97ba4208
SHA1

7fc836aaf75422e4d8a4c62b3c5136d464e24f8f
SHA256

033372113246279f04ccac1fab6748a2bfd2ed9b9c5cb980534f444dac558af8
SHA512

8fbb97b4ed844864b8aba660496b34176967343bea968108568426e227a83c70ad2159bbc532c1ac3b6fa832bd54cc3e5bbede6abc4986101ca6f7f026b81b00

Score

10^/10

xloader b2c0 loader rat suricata

Malware Config

Extracted

Family

xloader

Version

2.5

Campaign

b2c0

C2

http://www.thesewhitevvalls.com/b2c0/

Decoy

bjyxszd520.xyz

hsvfingerprinting.com

elliotpioneer.com

bf396.com

chinaopedia.com

6233v.com

shopeuphoricapparel.com

loccssol.store

truefictionpictures.com

playstarexch.com

peruviancoffee.store

shobhajoshi.com

philme.net

avito-rules.com

independencehomecenters.com

atp-cayenne.com

invetorsbank.com

sasanos.com

scentfreebnb.com

catfuid.com

Signatures

Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata
suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile
suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile
suricata

Xloader Payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1080-72-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/1080-73-0x000000000041D4C0-mapping.dmp	xloader
behavioral1/memory/1080-79-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/1488-86-0x0000000000080000-0x00000000000A9000-memory.dmp	xloader

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

5 1660 EQNEDT32.EXE
Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

1288 vbc.exe
1080 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXEvbc.exe

pid process

1660 EQNEDT32.EXE
1660 EQNEDT32.EXE
1660 EQNEDT32.EXE
1288 vbc.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
5	1660	EQNEDT32.EXE

pid	process
1288	vbc.exe
1080	vbc.exe

pid	process
1660	EQNEDT32.EXE
1660	EQNEDT32.EXE
1660	EQNEDT32.EXE
1288	vbc.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

vbc.exevbc.execontrol.exe

description	pid	process	target process
PID 1288 set thread context of 1080	1288	vbc.exe	vbc.exe
PID 1080 set thread context of 1212	1080	vbc.exe	Explorer.EXE
PID 1080 set thread context of 1212	1080	vbc.exe	Explorer.EXE
PID 1488 set thread context of 1212	1488	control.exe	Explorer.EXE

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

NSIS installer 12 IoCs

installer

Processes:

resource	yara_rule
\Users\Public\vbc.exe	nsis_installer_1
\Users\Public\vbc.exe	nsis_installer_2
\Users\Public\vbc.exe	nsis_installer_1
\Users\Public\vbc.exe	nsis_installer_2
\Users\Public\vbc.exe	nsis_installer_1
\Users\Public\vbc.exe	nsis_installer_2
C:\Users\Public\vbc.exe	nsis_installer_1
C:\Users\Public\vbc.exe	nsis_installer_2
C:\Users\Public\vbc.exe	nsis_installer_1
C:\Users\Public\vbc.exe	nsis_installer_2
C:\Users\Public\vbc.exe	nsis_installer_1
C:\Users\Public\vbc.exe	nsis_installer_2

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
Launches Equation Editor 1 TTPs 1 IoCs
Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.
exploit

Exploitation for Client Execution
T1203

Processes:

EQNEDT32.EXE

pid process

1660 EQNEDT32.EXE

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

pid	process
1660	EQNEDT32.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
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 (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\Toolbar	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
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1052 EXCEL.EXE

pid	process
1052	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 26 IoCs

Processes:

vbc.execontrol.exe

pid	process
1080	vbc.exe
1080	vbc.exe
1080	vbc.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe
1488	control.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1212 Explorer.EXE
Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

vbc.execontrol.exe

pid process

1080 vbc.exe
1080 vbc.exe
1080 vbc.exe
1080 vbc.exe
1488 control.exe
1488 control.exe

pid	process
1212	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 9 IoCs

Processes:

vbc.exeExplorer.EXEcontrol.exe

description	pid	process
Token: SeDebugPrivilege	1080	vbc.exe
Token: SeShutdownPrivilege	1212	Explorer.EXE
Token: SeShutdownPrivilege	1212	Explorer.EXE
Token: SeShutdownPrivilege	1212	Explorer.EXE
Token: SeShutdownPrivilege	1212	Explorer.EXE
Token: SeShutdownPrivilege	1212	Explorer.EXE
Token: SeDebugPrivilege	1488	control.exe
Token: SeShutdownPrivilege	1212	Explorer.EXE
Token: SeShutdownPrivilege	1212	Explorer.EXE

Suspicious use of FindShellTrayWindow 6 IoCs

Processes:

Explorer.EXE

pid process

1212 Explorer.EXE
1212 Explorer.EXE
1212 Explorer.EXE
1212 Explorer.EXE
1212 Explorer.EXE
1212 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1212 Explorer.EXE
1212 Explorer.EXE
1212 Explorer.EXE
1212 Explorer.EXE
Suspicious use of SetWindowsHookEx 5 IoCs

Processes:

EXCEL.EXE

pid process

1052 EXCEL.EXE
1052 EXCEL.EXE
1052 EXCEL.EXE
1052 EXCEL.EXE
1052 EXCEL.EXE

pid	process
1212	Explorer.EXE
1212	Explorer.EXE
1212	Explorer.EXE
1212	Explorer.EXE
1212	Explorer.EXE
1212	Explorer.EXE

pid	process
1212	Explorer.EXE
1212	Explorer.EXE
1212	Explorer.EXE
1212	Explorer.EXE

pid	process
1052	EXCEL.EXE
1052	EXCEL.EXE
1052	EXCEL.EXE
1052	EXCEL.EXE
1052	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

EQNEDT32.EXEvbc.exeExplorer.EXEcontrol.exe

description	pid	process	target process
PID 1660 wrote to memory of 1288	1660	EQNEDT32.EXE	vbc.exe
PID 1660 wrote to memory of 1288	1660	EQNEDT32.EXE	vbc.exe
PID 1660 wrote to memory of 1288	1660	EQNEDT32.EXE	vbc.exe
PID 1660 wrote to memory of 1288	1660	EQNEDT32.EXE	vbc.exe
PID 1288 wrote to memory of 1080	1288	vbc.exe	vbc.exe
PID 1288 wrote to memory of 1080	1288	vbc.exe	vbc.exe
PID 1288 wrote to memory of 1080	1288	vbc.exe	vbc.exe
PID 1288 wrote to memory of 1080	1288	vbc.exe	vbc.exe
PID 1288 wrote to memory of 1080	1288	vbc.exe	vbc.exe
PID 1288 wrote to memory of 1080	1288	vbc.exe	vbc.exe
PID 1288 wrote to memory of 1080	1288	vbc.exe	vbc.exe
PID 1212 wrote to memory of 1488	1212	Explorer.EXE	control.exe
PID 1212 wrote to memory of 1488	1212	Explorer.EXE	control.exe
PID 1212 wrote to memory of 1488	1212	Explorer.EXE	control.exe
PID 1212 wrote to memory of 1488	1212	Explorer.EXE	control.exe
PID 1488 wrote to memory of 840	1488	control.exe	cmd.exe
PID 1488 wrote to memory of 840	1488	control.exe	cmd.exe
PID 1488 wrote to memory of 840	1488	control.exe	cmd.exe
PID 1488 wrote to memory of 840	1488	control.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1212

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\09090.xlsx
2⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1052

C:\Windows\SysWOW64\control.exe
"C:\Windows\SysWOW64\control.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1488

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
3⤵
PID:840

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:1660

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1288

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1080

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Exploitation for Client Execution

1

T1203

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

2

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Public\vbc.exe
MD5
f8ba5db8bad75222081bc6b9297126a4

SHA1
290a186a9869a6f3ded1049b1d567eafe0041f5d

SHA256
b4fc77c70794670f21a4c4fbc3b608589cef7b9d98acadf9b0a956404f6ca0be

SHA512
70f90c213dfd898c3f9e91bb6855493ab894604f04ced9b910c3f37eb1bbe658b6944cc847e315d7fe9d793bf1dba8772c38ef12fbf3cf41c52fcde3adca26d5

Download Submit
C:\Users\Public\vbc.exe
MD5
f8ba5db8bad75222081bc6b9297126a4

SHA1
290a186a9869a6f3ded1049b1d567eafe0041f5d

SHA256
b4fc77c70794670f21a4c4fbc3b608589cef7b9d98acadf9b0a956404f6ca0be

SHA512
70f90c213dfd898c3f9e91bb6855493ab894604f04ced9b910c3f37eb1bbe658b6944cc847e315d7fe9d793bf1dba8772c38ef12fbf3cf41c52fcde3adca26d5

Download Submit
C:\Users\Public\vbc.exe
MD5
f8ba5db8bad75222081bc6b9297126a4

SHA1
290a186a9869a6f3ded1049b1d567eafe0041f5d

SHA256
b4fc77c70794670f21a4c4fbc3b608589cef7b9d98acadf9b0a956404f6ca0be

SHA512
70f90c213dfd898c3f9e91bb6855493ab894604f04ced9b910c3f37eb1bbe658b6944cc847e315d7fe9d793bf1dba8772c38ef12fbf3cf41c52fcde3adca26d5

Download Submit
\Users\Admin\AppData\Local\Temp\nsi560D.tmp\fqbakxndgg.dll
MD5
0ec0b6676a0c830fa1d12a82e0e2ccfc

SHA1
61edae0d4bb19dd31b9ed2ed4d76c99b4f04ebe2

SHA256
c168119aced865f94f0856f3d7419f33142ffe0e8f90c94205d5707b60710617

SHA512
ea5496d61a19ac03a49788d5cc7ae18603ec728c153b9c580f6faa7cfc850c297f9978429627e765467d8130409ca25ce041f0f42065d14fe53c6ef69943e574

Download Submit
\Users\Public\vbc.exe
MD5
f8ba5db8bad75222081bc6b9297126a4

SHA1
290a186a9869a6f3ded1049b1d567eafe0041f5d

SHA256
b4fc77c70794670f21a4c4fbc3b608589cef7b9d98acadf9b0a956404f6ca0be

SHA512
70f90c213dfd898c3f9e91bb6855493ab894604f04ced9b910c3f37eb1bbe658b6944cc847e315d7fe9d793bf1dba8772c38ef12fbf3cf41c52fcde3adca26d5

Download Submit
\Users\Public\vbc.exe
MD5
f8ba5db8bad75222081bc6b9297126a4

SHA1
290a186a9869a6f3ded1049b1d567eafe0041f5d

SHA256
b4fc77c70794670f21a4c4fbc3b608589cef7b9d98acadf9b0a956404f6ca0be

SHA512
70f90c213dfd898c3f9e91bb6855493ab894604f04ced9b910c3f37eb1bbe658b6944cc847e315d7fe9d793bf1dba8772c38ef12fbf3cf41c52fcde3adca26d5

Download Submit
\Users\Public\vbc.exe
MD5
f8ba5db8bad75222081bc6b9297126a4

SHA1
290a186a9869a6f3ded1049b1d567eafe0041f5d

SHA256
b4fc77c70794670f21a4c4fbc3b608589cef7b9d98acadf9b0a956404f6ca0be

SHA512
70f90c213dfd898c3f9e91bb6855493ab894604f04ced9b910c3f37eb1bbe658b6944cc847e315d7fe9d793bf1dba8772c38ef12fbf3cf41c52fcde3adca26d5

Download Submit
memory/840-84-0x0000000000000000-mapping.dmp

Download
memory/1052-61-0x0000000070E81000-0x0000000070E83000-memory.dmp

Filesize
8KB

Download
memory/1052-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1052-90-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1052-60-0x000000002F881000-0x000000002F884000-memory.dmp

Filesize
12KB

Download
memory/1080-76-0x0000000000900000-0x0000000000C03000-memory.dmp

Filesize
3.0MB

Download
memory/1080-72-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/1080-77-0x0000000000340000-0x0000000000351000-memory.dmp

Filesize
68KB

Download
memory/1080-79-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/1080-80-0x00000000003A0000-0x00000000003B1000-memory.dmp

Filesize
68KB

Download
memory/1080-73-0x000000000041D4C0-mapping.dmp

Download
memory/1212-89-0x0000000009240000-0x00000000093BA000-memory.dmp

Filesize
1.5MB

Download
memory/1212-78-0x0000000006E90000-0x0000000006FCB000-memory.dmp

Filesize
1.2MB

Download
memory/1212-81-0x0000000004500000-0x00000000045AF000-memory.dmp

Filesize
700KB

Download
memory/1212-92-0x000007FF21000000-0x000007FF2100A000-memory.dmp

Filesize
40KB

Download
memory/1212-91-0x000007FEF5310000-0x000007FEF5453000-memory.dmp

Filesize
1.3MB

Download
memory/1288-67-0x0000000000000000-mapping.dmp

Download
memory/1488-87-0x0000000002100000-0x0000000002403000-memory.dmp

Filesize
3.0MB

Download
memory/1488-88-0x00000000004E0000-0x0000000000570000-memory.dmp

Filesize
576KB

Download
memory/1488-86-0x0000000000080000-0x00000000000A9000-memory.dmp

Filesize
164KB

Download
memory/1488-85-0x0000000000CE0000-0x0000000000CFF000-memory.dmp

Filesize
124KB

Download
memory/1488-82-0x0000000000000000-mapping.dmp

Download
memory/1660-63-0x0000000074D91000-0x0000000074D93000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads