xloader | 4a5c10a7e9ec7b65f8605186726d4861c5bc96870204e12eb260ebd841e7aedb

General

Target

product specification.xlsx
Size

1.4MB
MD5

75c48b4392ae795beeb0317bfaef77bd
SHA1

8e3e8daaa18cb3cf0e3b73e90ecbd297c9d5e1ee
SHA256

4a5c10a7e9ec7b65f8605186726d4861c5bc96870204e12eb260ebd841e7aedb
SHA512

95480a723ab8360552a5d6820cd0ffd1371da2bc49d008620b1b7d034d49c2a6d69e2fd7b62af414f9260ee00f0c48bb8e045c1ca9f9d0de843a3e9b0b759366

Score

10^/10

xloader loader rat

Malware Config

Extracted

Family

xloader

Version

2.3

C2

http://www.montcoimmigrationlawyer.com/uoe8/

Decoy

chalance.design

certifiedlaywernj.com

bsbgraphic.com

caeka.com

zagorafinancial.com

cvingenieriacivil.net

mojilifenoosa.com

bucktheherd.net

sparkmonic.com

catherineandwilson.com

cdefenders.com

intersp.net

santoriniimpressivetours.net

arkansaspaymentrelief.com

tewab.com

bjzjgjg.com

michgoliki.com

oallahplease.com

plaisterpress.com

redyroblx.com

Signatures

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

Xloader Payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/860-74-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/112-82-0x0000000000080000-0x00000000000A9000-memory.dmp	xloader

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

6 2000 EQNEDT32.EXE
Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

928 vbc.exe
860 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXEvbc.exe

pid process

2000 EQNEDT32.EXE
2000 EQNEDT32.EXE
2000 EQNEDT32.EXE
928 vbc.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
6	2000	EQNEDT32.EXE

pid	process
928	vbc.exe
860	vbc.exe

pid	process
2000	EQNEDT32.EXE
2000	EQNEDT32.EXE
2000	EQNEDT32.EXE
928	vbc.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.exevbc.exeraserver.exe

description	pid	process	target process
PID 928 set thread context of 860	928	vbc.exe	vbc.exe
PID 860 set thread context of 1288	860	vbc.exe	Explorer.EXE
PID 112 set thread context of 1288	112	raserver.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

2000 EQNEDT32.EXE

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

pid	process
2000	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-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

768 EXCEL.EXE

pid	process
768	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 29 IoCs

Processes:

vbc.exeraserver.exe

pid	process
860	vbc.exe
860	vbc.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe
112	raserver.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1288 Explorer.EXE
Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

vbc.exevbc.exeraserver.exe

pid process

928 vbc.exe
860 vbc.exe
860 vbc.exe
860 vbc.exe
112 raserver.exe
112 raserver.exe

pid	process
1288	Explorer.EXE

pid	process
928	vbc.exe
860	vbc.exe
860	vbc.exe
860	vbc.exe
112	raserver.exe
112	raserver.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

vbc.exeExplorer.EXEraserver.exe

description	pid	process
Token: SeDebugPrivilege	860	vbc.exe
Token: SeShutdownPrivilege	1288	Explorer.EXE
Token: SeShutdownPrivilege	1288	Explorer.EXE
Token: SeShutdownPrivilege	1288	Explorer.EXE
Token: SeShutdownPrivilege	1288	Explorer.EXE
Token: SeDebugPrivilege	112	raserver.exe
Token: SeShutdownPrivilege	1288	Explorer.EXE
Token: SeShutdownPrivilege	1288	Explorer.EXE

Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1288 Explorer.EXE
1288 Explorer.EXE
1288 Explorer.EXE
1288 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1288 Explorer.EXE
1288 Explorer.EXE
1288 Explorer.EXE
1288 Explorer.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

768 EXCEL.EXE
768 EXCEL.EXE
768 EXCEL.EXE

pid	process
1288	Explorer.EXE
1288	Explorer.EXE
1288	Explorer.EXE
1288	Explorer.EXE

pid	process
1288	Explorer.EXE
1288	Explorer.EXE
1288	Explorer.EXE
1288	Explorer.EXE

pid	process
768	EXCEL.EXE
768	EXCEL.EXE
768	EXCEL.EXE

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

EQNEDT32.EXEvbc.exeExplorer.EXEraserver.exe

description	pid	process	target process
PID 2000 wrote to memory of 928	2000	EQNEDT32.EXE	vbc.exe
PID 2000 wrote to memory of 928	2000	EQNEDT32.EXE	vbc.exe
PID 2000 wrote to memory of 928	2000	EQNEDT32.EXE	vbc.exe
PID 2000 wrote to memory of 928	2000	EQNEDT32.EXE	vbc.exe
PID 928 wrote to memory of 860	928	vbc.exe	vbc.exe
PID 928 wrote to memory of 860	928	vbc.exe	vbc.exe
PID 928 wrote to memory of 860	928	vbc.exe	vbc.exe
PID 928 wrote to memory of 860	928	vbc.exe	vbc.exe
PID 928 wrote to memory of 860	928	vbc.exe	vbc.exe
PID 1288 wrote to memory of 112	1288	Explorer.EXE	raserver.exe
PID 1288 wrote to memory of 112	1288	Explorer.EXE	raserver.exe
PID 1288 wrote to memory of 112	1288	Explorer.EXE	raserver.exe
PID 1288 wrote to memory of 112	1288	Explorer.EXE	raserver.exe
PID 112 wrote to memory of 1608	112	raserver.exe	cmd.exe
PID 112 wrote to memory of 1608	112	raserver.exe	cmd.exe
PID 112 wrote to memory of 1608	112	raserver.exe	cmd.exe
PID 112 wrote to memory of 1608	112	raserver.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:1288

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\product specification.xlsx"
2⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:768

C:\Windows\SysWOW64\autoconv.exe
"C:\Windows\SysWOW64\autoconv.exe"
2⤵
PID:700

C:\Windows\SysWOW64\raserver.exe
"C:\Windows\SysWOW64\raserver.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:112

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
3⤵
PID:1608

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:2000

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:928

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:860

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
fb6c841478354f42dd2baa5e0b617dff

SHA1
c1d1212b6e7cae77ae2d617f461a7d6003cb6c6c

SHA256
b55552391ee123f26e577b412c0df78bd0a59644ec510d1e7e708feff12a2abb

SHA512
49fdaae6792f72de12b4303c4a1874a99e7d1c69bb32cb37d59d9e207e693cdf90612f5ec8278cd7e1cb8c1d1dcd8124b7f66165ed6730ab5c1ec0e8cc8dddb8

Download Submit
C:\Users\Public\vbc.exe
MD5
fb6c841478354f42dd2baa5e0b617dff

SHA1
c1d1212b6e7cae77ae2d617f461a7d6003cb6c6c

SHA256
b55552391ee123f26e577b412c0df78bd0a59644ec510d1e7e708feff12a2abb

SHA512
49fdaae6792f72de12b4303c4a1874a99e7d1c69bb32cb37d59d9e207e693cdf90612f5ec8278cd7e1cb8c1d1dcd8124b7f66165ed6730ab5c1ec0e8cc8dddb8

Download Submit
C:\Users\Public\vbc.exe
MD5
fb6c841478354f42dd2baa5e0b617dff

SHA1
c1d1212b6e7cae77ae2d617f461a7d6003cb6c6c

SHA256
b55552391ee123f26e577b412c0df78bd0a59644ec510d1e7e708feff12a2abb

SHA512
49fdaae6792f72de12b4303c4a1874a99e7d1c69bb32cb37d59d9e207e693cdf90612f5ec8278cd7e1cb8c1d1dcd8124b7f66165ed6730ab5c1ec0e8cc8dddb8

Download Submit
\Users\Admin\AppData\Local\Temp\nsn3EC7.tmp\ynuec.dll
MD5
40ad901ded07128f45c05b24c6aee1e0

SHA1
cdf241938b7e2574ad66ced23de599dc7e523bc8

SHA256
15e60d9e5fa792cd5cc27efc82d3f678cb4b75e28db4ae0161674f48f91977ab

SHA512
b21ab6c90e1bde8ffeb96eedc9ac580eb33a13489dc2d786951fd976034b55d36b28bb720efdbdf30437848ac57c6d5844678a0896c219e85fe71a462904b0d3

Download Submit
\Users\Public\vbc.exe
MD5
fb6c841478354f42dd2baa5e0b617dff

SHA1
c1d1212b6e7cae77ae2d617f461a7d6003cb6c6c

SHA256
b55552391ee123f26e577b412c0df78bd0a59644ec510d1e7e708feff12a2abb

SHA512
49fdaae6792f72de12b4303c4a1874a99e7d1c69bb32cb37d59d9e207e693cdf90612f5ec8278cd7e1cb8c1d1dcd8124b7f66165ed6730ab5c1ec0e8cc8dddb8

Download Submit
\Users\Public\vbc.exe
MD5
fb6c841478354f42dd2baa5e0b617dff

SHA1
c1d1212b6e7cae77ae2d617f461a7d6003cb6c6c

SHA256
b55552391ee123f26e577b412c0df78bd0a59644ec510d1e7e708feff12a2abb

SHA512
49fdaae6792f72de12b4303c4a1874a99e7d1c69bb32cb37d59d9e207e693cdf90612f5ec8278cd7e1cb8c1d1dcd8124b7f66165ed6730ab5c1ec0e8cc8dddb8

Download Submit
\Users\Public\vbc.exe
MD5
fb6c841478354f42dd2baa5e0b617dff

SHA1
c1d1212b6e7cae77ae2d617f461a7d6003cb6c6c

SHA256
b55552391ee123f26e577b412c0df78bd0a59644ec510d1e7e708feff12a2abb

SHA512
49fdaae6792f72de12b4303c4a1874a99e7d1c69bb32cb37d59d9e207e693cdf90612f5ec8278cd7e1cb8c1d1dcd8124b7f66165ed6730ab5c1ec0e8cc8dddb8

Download Submit
memory/112-78-0x0000000000000000-mapping.dmp

Download
memory/112-84-0x00000000008F0000-0x0000000000980000-memory.dmp

Filesize
576KB

Download
memory/112-83-0x0000000000BC0000-0x0000000000EC3000-memory.dmp

Filesize
3.0MB

Download
memory/112-81-0x0000000000EF0000-0x0000000000F0C000-memory.dmp

Filesize
112KB

Download
memory/112-82-0x0000000000080000-0x00000000000A9000-memory.dmp

Filesize
164KB

Download
memory/768-59-0x000000002F8A1000-0x000000002F8A4000-memory.dmp

Filesize
12KB

Download
memory/768-86-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/768-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/768-60-0x0000000071981000-0x0000000071983000-memory.dmp

Filesize
8KB

Download
memory/860-72-0x000000000041D0A0-mapping.dmp

Download
memory/860-76-0x0000000000350000-0x0000000000361000-memory.dmp

Filesize
68KB

Download
memory/860-75-0x0000000000910000-0x0000000000C13000-memory.dmp

Filesize
3.0MB

Download
memory/860-74-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/928-66-0x0000000000000000-mapping.dmp

Download
memory/928-71-0x0000000000300000-0x0000000000302000-memory.dmp

Filesize
8KB

Download
memory/1288-77-0x00000000064A0000-0x00000000065BE000-memory.dmp

Filesize
1.1MB

Download
memory/1288-85-0x0000000004360000-0x000000000442D000-memory.dmp

Filesize
820KB

Download
memory/1608-80-0x0000000000000000-mapping.dmp

Download
memory/2000-62-0x0000000075EF1000-0x0000000075EF3000-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