xloader | 43b70d6f8bd360f7ad9bcb4f9f0bd70adbab27a733d27ec320168e1a127d8481

Analysis

max time kernel
147s
max time network
138s
platform
windows7_x64
resource
win7v20210408
submitted
03-05-2021 12:48

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General

Target

PO20210503.docx
Size

10KB
MD5

01efad1d21685954881771187b7c89a3
SHA1

27a25eb720a4463bc31ce42d344cb42e634c3ef8
SHA256

43b70d6f8bd360f7ad9bcb4f9f0bd70adbab27a733d27ec320168e1a127d8481
SHA512

80e44521033828bcd8943870d751139ae76b38e2d02f3dce8ac56df322c2ebc70d92fb8036850be373e8f0e23c4649a3b774523a3431cf59888a42e2c5e1e955

Score

10^/10

xloader loader rat

Malware Config

Extracted

Family

xloader

Version

2.3

http://www.cats16.com/8u3b/

Decoy

pipienta.com

wisdomfest.net

jenniferreich.com

bigcanoehomesforless.com

kayandbernard.com

offerbuildingsecrets.com

benleefoto.com

contactlesssoftware.tech

statenislandplumbing.info

lifestylemedicineservices.com

blazerplanning.com

fnatic-skins.club

effectivemarketinginc.com

babyshopit.com

2000deal.com

k12paymentcemter.com

spwakd.com

lesreponses.com

abundando.com

hawkspremierfhc.com

Signatures

Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader

Xloader Payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/900-81-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/900-82-0x000000000041D0A0-mapping.dmp	xloader

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

9 1084 EQNEDT32.EXE
Downloads MZ/PE file
Executes dropped EXE 4 IoCs

Processes:

vbc.exevbc.exevbc.exevbc.exe

pid process

308 vbc.exe
764 vbc.exe
812 vbc.exe
900 vbc.exe

flow	pid	process
9	1084	EQNEDT32.EXE

pid	process
308	vbc.exe
764	vbc.exe
812	vbc.exe
900	vbc.exe

Abuses OpenXML format to download file from external location 2 IoCs

Processes:

WINWORD.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE
Key opened	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Office\Common\Offline\Files\http://will.kasraz.com/a/d.dot	WINWORD.EXE

Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1084 EQNEDT32.EXE
1084 EQNEDT32.EXE
1084 EQNEDT32.EXE
1084 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Suspicious use of SetThreadContext 2 IoCs

Processes:

vbc.exevbc.exe

description pid process target process

PID 308 set thread context of 900 308 vbc.exe vbc.exe
PID 900 set thread context of 1224 900 vbc.exe Explorer.EXE
Drops file in Windows directory 1 IoCs

Processes:

WINWORD.EXE

description ioc process

File opened for modification C:\Windows\Debug\WIA\wiatrace.log WINWORD.EXE
Office loads VBA resources, possible macro or embedded object present
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

1084 EQNEDT32.EXE

pid	process
1084	EQNEDT32.EXE
1084	EQNEDT32.EXE
1084	EQNEDT32.EXE
1084	EQNEDT32.EXE

description	pid	process	target process
PID 308 set thread context of 900	308	vbc.exe	vbc.exe
PID 900 set thread context of 1224	900	vbc.exe	Explorer.EXE

description	ioc	process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

pid	process
1084	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

WINWORD.EXE

description	ioc	process
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"	WINWORD.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"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	WINWORD.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"	WINWORD.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"	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

WINWORD.EXE

pid process

1996 WINWORD.EXE
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

vbc.exevbc.exe

pid process

308 vbc.exe
308 vbc.exe
308 vbc.exe
308 vbc.exe
900 vbc.exe
900 vbc.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

vbc.exe

pid process

900 vbc.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

vbc.exevbc.exe

description pid process

Token: SeDebugPrivilege 308 vbc.exe
Token: SeDebugPrivilege 900 vbc.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

WINWORD.EXE

pid process

1996 WINWORD.EXE
1996 WINWORD.EXE

pid	process
1996	WINWORD.EXE

pid	process
308	vbc.exe
308	vbc.exe
308	vbc.exe
308	vbc.exe
900	vbc.exe
900	vbc.exe

pid	process
900	vbc.exe

description	pid	process
Token: SeDebugPrivilege	308	vbc.exe
Token: SeDebugPrivilege	900	vbc.exe

pid	process
1996	WINWORD.EXE
1996	WINWORD.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

EQNEDT32.EXEWINWORD.EXEvbc.exe

description	pid	process	target process
PID 1084 wrote to memory of 308	1084	EQNEDT32.EXE	vbc.exe
PID 1084 wrote to memory of 308	1084	EQNEDT32.EXE	vbc.exe
PID 1084 wrote to memory of 308	1084	EQNEDT32.EXE	vbc.exe
PID 1084 wrote to memory of 308	1084	EQNEDT32.EXE	vbc.exe
PID 1996 wrote to memory of 1536	1996	WINWORD.EXE	splwow64.exe
PID 1996 wrote to memory of 1536	1996	WINWORD.EXE	splwow64.exe
PID 1996 wrote to memory of 1536	1996	WINWORD.EXE	splwow64.exe
PID 1996 wrote to memory of 1536	1996	WINWORD.EXE	splwow64.exe
PID 308 wrote to memory of 764	308	vbc.exe	vbc.exe
PID 308 wrote to memory of 764	308	vbc.exe	vbc.exe
PID 308 wrote to memory of 764	308	vbc.exe	vbc.exe
PID 308 wrote to memory of 764	308	vbc.exe	vbc.exe
PID 308 wrote to memory of 812	308	vbc.exe	vbc.exe
PID 308 wrote to memory of 812	308	vbc.exe	vbc.exe
PID 308 wrote to memory of 812	308	vbc.exe	vbc.exe
PID 308 wrote to memory of 812	308	vbc.exe	vbc.exe
PID 308 wrote to memory of 900	308	vbc.exe	vbc.exe
PID 308 wrote to memory of 900	308	vbc.exe	vbc.exe
PID 308 wrote to memory of 900	308	vbc.exe	vbc.exe
PID 308 wrote to memory of 900	308	vbc.exe	vbc.exe
PID 308 wrote to memory of 900	308	vbc.exe	vbc.exe
PID 308 wrote to memory of 900	308	vbc.exe	vbc.exe
PID 308 wrote to memory of 900	308	vbc.exe	vbc.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1224

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\PO20210503.docx"
2⤵
- Abuses OpenXML format to download file from external location
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1996

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
3⤵
PID:1536

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:1084

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:308

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
3⤵
- Executes dropped EXE
PID:764

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
3⤵
- Executes dropped EXE
PID:812

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:900

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Exploitation for Client Execution

T1203

Scripting

T1064

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Scripting

T1064

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Public\vbc.exe

MD5
74ed218c2c421e3978445a1edbe40a08

SHA1
16d950eae07654c9805d4476928c4c8d7d12fcc1

SHA256
b32ad3bf2b79e411ca0450c1d5430d12c9bb73c269e0838ee512bc816fcce3b7

SHA512
0cb4af6ad1434d4140d0e055fc77de2543c9ea9babe077de27184b1628cbdc8f32530c5f0c2f4b3e1199459c0521e67415421525070c0870e75dc09105bf94d6

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

MD5
74ed218c2c421e3978445a1edbe40a08

SHA1
16d950eae07654c9805d4476928c4c8d7d12fcc1

SHA256
b32ad3bf2b79e411ca0450c1d5430d12c9bb73c269e0838ee512bc816fcce3b7

SHA512
0cb4af6ad1434d4140d0e055fc77de2543c9ea9babe077de27184b1628cbdc8f32530c5f0c2f4b3e1199459c0521e67415421525070c0870e75dc09105bf94d6

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

MD5
74ed218c2c421e3978445a1edbe40a08

SHA1
16d950eae07654c9805d4476928c4c8d7d12fcc1

SHA256
b32ad3bf2b79e411ca0450c1d5430d12c9bb73c269e0838ee512bc816fcce3b7

SHA512
0cb4af6ad1434d4140d0e055fc77de2543c9ea9babe077de27184b1628cbdc8f32530c5f0c2f4b3e1199459c0521e67415421525070c0870e75dc09105bf94d6

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

MD5
74ed218c2c421e3978445a1edbe40a08

SHA1
16d950eae07654c9805d4476928c4c8d7d12fcc1

SHA256
b32ad3bf2b79e411ca0450c1d5430d12c9bb73c269e0838ee512bc816fcce3b7

SHA512
0cb4af6ad1434d4140d0e055fc77de2543c9ea9babe077de27184b1628cbdc8f32530c5f0c2f4b3e1199459c0521e67415421525070c0870e75dc09105bf94d6

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

MD5
74ed218c2c421e3978445a1edbe40a08

SHA1
16d950eae07654c9805d4476928c4c8d7d12fcc1

SHA256
b32ad3bf2b79e411ca0450c1d5430d12c9bb73c269e0838ee512bc816fcce3b7

SHA512
0cb4af6ad1434d4140d0e055fc77de2543c9ea9babe077de27184b1628cbdc8f32530c5f0c2f4b3e1199459c0521e67415421525070c0870e75dc09105bf94d6

Download Submit
\Users\Public\vbc.exe

MD5
74ed218c2c421e3978445a1edbe40a08

SHA1
16d950eae07654c9805d4476928c4c8d7d12fcc1

SHA256
b32ad3bf2b79e411ca0450c1d5430d12c9bb73c269e0838ee512bc816fcce3b7

SHA512
0cb4af6ad1434d4140d0e055fc77de2543c9ea9babe077de27184b1628cbdc8f32530c5f0c2f4b3e1199459c0521e67415421525070c0870e75dc09105bf94d6

Download Submit
\Users\Public\vbc.exe

MD5
74ed218c2c421e3978445a1edbe40a08

SHA1
16d950eae07654c9805d4476928c4c8d7d12fcc1

SHA256
b32ad3bf2b79e411ca0450c1d5430d12c9bb73c269e0838ee512bc816fcce3b7

SHA512
0cb4af6ad1434d4140d0e055fc77de2543c9ea9babe077de27184b1628cbdc8f32530c5f0c2f4b3e1199459c0521e67415421525070c0870e75dc09105bf94d6

Download Submit
\Users\Public\vbc.exe

MD5
74ed218c2c421e3978445a1edbe40a08

SHA1
16d950eae07654c9805d4476928c4c8d7d12fcc1

SHA256
b32ad3bf2b79e411ca0450c1d5430d12c9bb73c269e0838ee512bc816fcce3b7

SHA512
0cb4af6ad1434d4140d0e055fc77de2543c9ea9babe077de27184b1628cbdc8f32530c5f0c2f4b3e1199459c0521e67415421525070c0870e75dc09105bf94d6

Download Submit
\Users\Public\vbc.exe

MD5
74ed218c2c421e3978445a1edbe40a08

SHA1
16d950eae07654c9805d4476928c4c8d7d12fcc1

SHA256
b32ad3bf2b79e411ca0450c1d5430d12c9bb73c269e0838ee512bc816fcce3b7

SHA512
0cb4af6ad1434d4140d0e055fc77de2543c9ea9babe077de27184b1628cbdc8f32530c5f0c2f4b3e1199459c0521e67415421525070c0870e75dc09105bf94d6

Download Submit
memory/308-76-0x0000000000230000-0x000000000023E000-memory.dmp

Filesize
56KB

Download
memory/308-68-0x0000000000000000-mapping.dmp

Download
memory/308-71-0x0000000000E00000-0x0000000000E01000-memory.dmp

Filesize
4KB

Download
memory/308-78-0x0000000004D90000-0x0000000004DF2000-memory.dmp

Filesize
392KB

Download
memory/308-77-0x0000000005160000-0x0000000005208000-memory.dmp

Filesize
672KB

Download
memory/308-75-0x0000000004F70000-0x0000000004F71000-memory.dmp

Filesize
4KB

Download
memory/900-81-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/900-82-0x000000000041D0A0-mapping.dmp

Download
memory/900-85-0x00000000008C0000-0x0000000000BC3000-memory.dmp

Filesize
3.0MB

Download
memory/900-86-0x0000000000280000-0x0000000000291000-memory.dmp

Filesize
68KB

Download
memory/1084-63-0x00000000767B1000-0x00000000767B3000-memory.dmp

Filesize
8KB

Download
memory/1224-87-0x0000000005FE0000-0x000000000615F000-memory.dmp

Filesize
1.5MB

Download
memory/1536-74-0x000007FEFC051000-0x000007FEFC053000-memory.dmp

Filesize
8KB

Download
memory/1536-73-0x0000000000000000-mapping.dmp

Download
memory/1996-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1996-60-0x0000000072B51000-0x0000000072B54000-memory.dmp

Filesize
12KB

Download
memory/1996-61-0x00000000705D1000-0x00000000705D3000-memory.dmp

Filesize
8KB

Download