xloader | 033372113246279f04ccac1fab6748a2bfd2ed9b9c5cb980534f444dac558af8

General

Target

SOA.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/984-72-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/984-73-0x000000000041D4C0-mapping.dmp	xloader
behavioral1/memory/984-79-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/924-85-0x0000000000080000-0x00000000000A9000-memory.dmp	xloader

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

3 1888 EQNEDT32.EXE
Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

1216 vbc.exe
984 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXEvbc.exe

pid process

1888 EQNEDT32.EXE
1888 EQNEDT32.EXE
1888 EQNEDT32.EXE
1216 vbc.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
3	1888	EQNEDT32.EXE

pid	process
1216	vbc.exe
984	vbc.exe

pid	process
1888	EQNEDT32.EXE
1888	EQNEDT32.EXE
1888	EQNEDT32.EXE
1216	vbc.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

vbc.exevbc.exemsdt.exe

description	pid	process	target process
PID 1216 set thread context of 984	1216	vbc.exe	vbc.exe
PID 984 set thread context of 1180	984	vbc.exe	Explorer.EXE
PID 984 set thread context of 1180	984	vbc.exe	Explorer.EXE
PID 924 set thread context of 1180	924	msdt.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

1888 EQNEDT32.EXE

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

pid	process
1888	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	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
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
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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

784 EXCEL.EXE

pid	process
784	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 29 IoCs

Processes:

vbc.exemsdt.exe

pid	process
984	vbc.exe
984	vbc.exe
984	vbc.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe
924	msdt.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1180 Explorer.EXE
Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

vbc.exemsdt.exe

pid process

984 vbc.exe
984 vbc.exe
984 vbc.exe
984 vbc.exe
924 msdt.exe
924 msdt.exe

pid	process
1180	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

vbc.exeExplorer.EXEmsdt.exe

description	pid	process
Token: SeDebugPrivilege	984	vbc.exe
Token: SeShutdownPrivilege	1180	Explorer.EXE
Token: SeDebugPrivilege	924	msdt.exe
Token: SeShutdownPrivilege	1180	Explorer.EXE
Token: SeShutdownPrivilege	1180	Explorer.EXE

Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1180 Explorer.EXE
1180 Explorer.EXE
1180 Explorer.EXE
1180 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1180 Explorer.EXE
1180 Explorer.EXE
1180 Explorer.EXE
1180 Explorer.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

784 EXCEL.EXE
784 EXCEL.EXE
784 EXCEL.EXE

pid	process
1180	Explorer.EXE
1180	Explorer.EXE
1180	Explorer.EXE
1180	Explorer.EXE

pid	process
1180	Explorer.EXE
1180	Explorer.EXE
1180	Explorer.EXE
1180	Explorer.EXE

pid	process
784	EXCEL.EXE
784	EXCEL.EXE
784	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

EQNEDT32.EXEvbc.exevbc.exemsdt.exe

description	pid	process	target process
PID 1888 wrote to memory of 1216	1888	EQNEDT32.EXE	vbc.exe
PID 1888 wrote to memory of 1216	1888	EQNEDT32.EXE	vbc.exe
PID 1888 wrote to memory of 1216	1888	EQNEDT32.EXE	vbc.exe
PID 1888 wrote to memory of 1216	1888	EQNEDT32.EXE	vbc.exe
PID 1216 wrote to memory of 984	1216	vbc.exe	vbc.exe
PID 1216 wrote to memory of 984	1216	vbc.exe	vbc.exe
PID 1216 wrote to memory of 984	1216	vbc.exe	vbc.exe
PID 1216 wrote to memory of 984	1216	vbc.exe	vbc.exe
PID 1216 wrote to memory of 984	1216	vbc.exe	vbc.exe
PID 1216 wrote to memory of 984	1216	vbc.exe	vbc.exe
PID 1216 wrote to memory of 984	1216	vbc.exe	vbc.exe
PID 984 wrote to memory of 924	984	vbc.exe	msdt.exe
PID 984 wrote to memory of 924	984	vbc.exe	msdt.exe
PID 984 wrote to memory of 924	984	vbc.exe	msdt.exe
PID 984 wrote to memory of 924	984	vbc.exe	msdt.exe
PID 924 wrote to memory of 956	924	msdt.exe	cmd.exe
PID 924 wrote to memory of 956	924	msdt.exe	cmd.exe
PID 924 wrote to memory of 956	924	msdt.exe	cmd.exe
PID 924 wrote to memory of 956	924	msdt.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
PID:1180

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\SOA.xlsx
2⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:784

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:1888

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:1216

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
- Suspicious use of WriteProcessMemory
PID:984

C:\Windows\SysWOW64\msdt.exe
"C:\Windows\SysWOW64\msdt.exe"
4⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:924

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
5⤵
PID:956

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Public\vbc.exe
MD5
3737a705b553c9a6245722aa948a2beb

SHA1
b6a2abfaaffbb3560dc9ebae6f3bd14aa0594b44

SHA256
612a346d3e2412113c53343b67419bc7a13bcf1bfe890137b68b3b5553a20096

SHA512
401c211911ab46dfe85c015e2aa9c469f5486457f980c5eea4bf5e27ca74d13069c74ff9844cfd2d755e6ca44997e1ad49655bd8d383366ab40ed48e709ef22a

Download Submit
C:\Users\Public\vbc.exe
MD5
3737a705b553c9a6245722aa948a2beb

SHA1
b6a2abfaaffbb3560dc9ebae6f3bd14aa0594b44

SHA256
612a346d3e2412113c53343b67419bc7a13bcf1bfe890137b68b3b5553a20096

SHA512
401c211911ab46dfe85c015e2aa9c469f5486457f980c5eea4bf5e27ca74d13069c74ff9844cfd2d755e6ca44997e1ad49655bd8d383366ab40ed48e709ef22a

Download Submit
C:\Users\Public\vbc.exe
MD5
3737a705b553c9a6245722aa948a2beb

SHA1
b6a2abfaaffbb3560dc9ebae6f3bd14aa0594b44

SHA256
612a346d3e2412113c53343b67419bc7a13bcf1bfe890137b68b3b5553a20096

SHA512
401c211911ab46dfe85c015e2aa9c469f5486457f980c5eea4bf5e27ca74d13069c74ff9844cfd2d755e6ca44997e1ad49655bd8d383366ab40ed48e709ef22a

Download Submit
\Users\Admin\AppData\Local\Temp\nsx77B0.tmp\wxmkcb.dll
MD5
0c830a1bd50b239167ea8a7bdd68e095

SHA1
e65f3280c817f0f7e52a52112121d17ffcbc7e5d

SHA256
b31b5199366598aa7e035d334e1f045b79902aedb13186f8ba178f9cc8d7b49a

SHA512
c81ced34a906cfcd2e79466a0cbed7bcca3d5d830dcb5b710d45ea2d572d19763bd7721c55368e80a015e716f47e0fe8f45acf30d8e8e24e9d4c0e3d00dffa17

Download Submit
\Users\Public\vbc.exe
MD5
3737a705b553c9a6245722aa948a2beb

SHA1
b6a2abfaaffbb3560dc9ebae6f3bd14aa0594b44

SHA256
612a346d3e2412113c53343b67419bc7a13bcf1bfe890137b68b3b5553a20096

SHA512
401c211911ab46dfe85c015e2aa9c469f5486457f980c5eea4bf5e27ca74d13069c74ff9844cfd2d755e6ca44997e1ad49655bd8d383366ab40ed48e709ef22a

Download Submit
\Users\Public\vbc.exe
MD5
3737a705b553c9a6245722aa948a2beb

SHA1
b6a2abfaaffbb3560dc9ebae6f3bd14aa0594b44

SHA256
612a346d3e2412113c53343b67419bc7a13bcf1bfe890137b68b3b5553a20096

SHA512
401c211911ab46dfe85c015e2aa9c469f5486457f980c5eea4bf5e27ca74d13069c74ff9844cfd2d755e6ca44997e1ad49655bd8d383366ab40ed48e709ef22a

Download Submit
\Users\Public\vbc.exe
MD5
3737a705b553c9a6245722aa948a2beb

SHA1
b6a2abfaaffbb3560dc9ebae6f3bd14aa0594b44

SHA256
612a346d3e2412113c53343b67419bc7a13bcf1bfe890137b68b3b5553a20096

SHA512
401c211911ab46dfe85c015e2aa9c469f5486457f980c5eea4bf5e27ca74d13069c74ff9844cfd2d755e6ca44997e1ad49655bd8d383366ab40ed48e709ef22a

Download Submit
memory/784-90-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/784-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/784-61-0x0000000071141000-0x0000000071143000-memory.dmp

Filesize
8KB

Download
memory/784-60-0x000000002F581000-0x000000002F584000-memory.dmp

Filesize
12KB

Download
memory/924-88-0x0000000000B50000-0x0000000000BE0000-memory.dmp

Filesize
576KB

Download
memory/924-82-0x0000000000000000-mapping.dmp

Download
memory/924-87-0x0000000002360000-0x0000000002663000-memory.dmp

Filesize
3.0MB

Download
memory/924-84-0x0000000000E60000-0x0000000000F54000-memory.dmp

Filesize
976KB

Download
memory/924-85-0x0000000000080000-0x00000000000A9000-memory.dmp

Filesize
164KB

Download
memory/956-86-0x0000000000000000-mapping.dmp

Download
memory/984-77-0x0000000000340000-0x0000000000351000-memory.dmp

Filesize
68KB

Download
memory/984-80-0x0000000000390000-0x00000000003A1000-memory.dmp

Filesize
68KB

Download
memory/984-79-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/984-76-0x00000000008E0000-0x0000000000BE3000-memory.dmp

Filesize
3.0MB

Download
memory/984-73-0x000000000041D4C0-mapping.dmp

Download
memory/984-72-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/1180-81-0x0000000007420000-0x00000000075A8000-memory.dmp

Filesize
1.5MB

Download
memory/1180-78-0x0000000006330000-0x00000000064B7000-memory.dmp

Filesize
1.5MB

Download
memory/1180-89-0x0000000004C60000-0x0000000004D1A000-memory.dmp

Filesize
744KB

Download
memory/1180-91-0x000007FEF5820000-0x000007FEF5963000-memory.dmp

Filesize
1.3MB

Download
memory/1180-92-0x000007FF54B80000-0x000007FF54B8A000-memory.dmp

Filesize
40KB

Download
memory/1216-67-0x0000000000000000-mapping.dmp

Download
memory/1888-63-0x0000000075211000-0x0000000075213000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads