xloader | a7c1f4ae5c35b88e68b4d82db4c7e14d53922946d853569b5efd5050e7480229

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
02-09-2022 03:27

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General

Target

37.exe
Size

176KB
MD5

67dc61588f11f816b92690ea723fcd8e
SHA1

73fd5e1d4bc161d5aa803ed1db493ce7cbca5f75
SHA256

35876cb065b7b1a590a882ab9b85539d567043c53362208955f69093855e9ea9
SHA512

7995ff412f92a72eeffc14633d225fb0bb68bfb5c54f0babd13416be4e11ab035d7f4ea7875de42ddb9fd899f25810b56009ca8b26f6d88d255c59e6f1e89a01
SSDEEP

3072:DO+opXUUl1BGq3gjSW7ho/xYTXdS3cR+Z7v+cj5ilpbvHi21PQdk775cxIh0d:DaDzsggjHe/xY7d4cR+Zv+cN4B1IOP5c

Score

10^/10

xloader fofg loader persistence rat spyware stealer

Malware Config

Extracted

Family

xloader

Version

2.9

Campaign

fofg

Decoy

FHyydxpFBs0S8b4ZlP7ZEtd/

EVaCEKb/cVV9xQ==

U9I5lke0IuU7vj5EXus=

rXD3AKPV3qUblOUsV41KMfU=

PwBSy5z56XNzIvnS3ygsKv0=

CQe1BLbSnGXX

HuhKjxhLhxqBy2FFz8WoFA==

QJymezEoLOFZ1T5EXus=

V8r5PAdwuGK2AUARohas

b1XV06ANH9s5uj5EXus=

3EiEhwo7Euw2tl8=

c2PjK8Izkydy5N8x

CXCkYf0m/qPrv8QajKyT6Oo=

pHjy+Mk0CqvWBXdCz8WoFA==

QjSwr3/j5rAyvz5EXus=

+edxANg/sU+k8YFQz8WoFA==

tWiQq3rqyl6cTAG9pA==

GeAyMQxBUOlDwD5EXus=

nQ5eoT2mEKkhDN2DwBek

JP5dIbHlrXXR8umDwBek

Signatures

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

Xloader payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral5/memory/3796-137-0x0000000000150000-0x000000000017C000-memory.dmp	xloader
behavioral5/memory/3796-142-0x0000000000150000-0x000000000017C000-memory.dmp	xloader
C:\Program Files (x86)\Rv8l\updatexfc8ftb.exe	xloader
C:\Program Files (x86)\Rv8l\updatexfc8ftb.exe	xloader

Blocklisted process makes network request 1 IoCs

Processes:

msiexec.exe

flow pid process

31 3796 msiexec.exe
Executes dropped EXE 1 IoCs

Processes:

updatexfc8ftb.exe

pid process

3624 updatexfc8ftb.exe
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

37.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation 37.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

flow	pid	process
31	3796	msiexec.exe

pid	process
3624	updatexfc8ftb.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	37.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

msiexec.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	msiexec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\3FEDAN8H5 = "C:\\Program Files (x86)\\Rv8l\\updatexfc8ftb.exe"	msiexec.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

37.exemsiexec.exe

description	pid	process	target process
PID 3848 set thread context of 2664	3848	37.exe	Explorer.EXE
PID 3796 set thread context of 2664	3796	msiexec.exe	Explorer.EXE

Drops file in Program Files directory 4 IoCs

Processes:

Explorer.EXEmsiexec.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Rv8l	Explorer.EXE
File created	C:\Program Files (x86)\Rv8l\updatexfc8ftb.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\Rv8l\updatexfc8ftb.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\Rv8l\updatexfc8ftb.exe	msiexec.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

msiexec.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	msiexec.exe

Suspicious behavior: EnumeratesProcesses 60 IoCs

Processes:

37.exemsiexec.exeupdatexfc8ftb.exe

pid	process
3848	37.exe
3848	37.exe
3848	37.exe
3848	37.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3796	msiexec.exe
3624	updatexfc8ftb.exe
3624	updatexfc8ftb.exe
3796	msiexec.exe
3796	msiexec.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2664 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

37.exemsiexec.exe

pid process

3848 37.exe
3848 37.exe
3848 37.exe
3796 msiexec.exe
3796 msiexec.exe
3796 msiexec.exe
3796 msiexec.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

37.exemsiexec.exeupdatexfc8ftb.exe

description pid process

Token: SeDebugPrivilege 3848 37.exe
Token: SeDebugPrivilege 3796 msiexec.exe
Token: SeDebugPrivilege 3624 updatexfc8ftb.exe

pid	process
2664	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	3848	37.exe
Token: SeDebugPrivilege	3796	msiexec.exe
Token: SeDebugPrivilege	3624	updatexfc8ftb.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

Explorer.EXEmsiexec.exe

description	pid	process	target process
PID 2664 wrote to memory of 3796	2664	Explorer.EXE	msiexec.exe
PID 2664 wrote to memory of 3796	2664	Explorer.EXE	msiexec.exe
PID 2664 wrote to memory of 3796	2664	Explorer.EXE	msiexec.exe
PID 3796 wrote to memory of 1680	3796	msiexec.exe	cmd.exe
PID 3796 wrote to memory of 1680	3796	msiexec.exe	cmd.exe
PID 3796 wrote to memory of 1680	3796	msiexec.exe	cmd.exe
PID 3796 wrote to memory of 2720	3796	msiexec.exe	cmd.exe
PID 3796 wrote to memory of 2720	3796	msiexec.exe	cmd.exe
PID 3796 wrote to memory of 2720	3796	msiexec.exe	cmd.exe
PID 3796 wrote to memory of 5104	3796	msiexec.exe	cmd.exe
PID 3796 wrote to memory of 5104	3796	msiexec.exe	cmd.exe
PID 3796 wrote to memory of 5104	3796	msiexec.exe	cmd.exe
PID 3796 wrote to memory of 4744	3796	msiexec.exe	Firefox.exe
PID 3796 wrote to memory of 4744	3796	msiexec.exe	Firefox.exe
PID 3796 wrote to memory of 4744	3796	msiexec.exe	Firefox.exe
PID 2664 wrote to memory of 3624	2664	Explorer.EXE	updatexfc8ftb.exe
PID 2664 wrote to memory of 3624	2664	Explorer.EXE	updatexfc8ftb.exe
PID 2664 wrote to memory of 3624	2664	Explorer.EXE	updatexfc8ftb.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Program Files directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2664

C:\Users\Admin\AppData\Local\Temp\37.exe
"C:\Users\Admin\AppData\Local\Temp\37.exe"
2⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3848

C:\Windows\SysWOW64\msiexec.exe
"C:\Windows\SysWOW64\msiexec.exe"
2⤵
- Blocklisted process makes network request
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3796

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\37.exe"
3⤵
PID:1680

C:\Windows\SysWOW64\cmd.exe
/c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
3⤵
PID:2720

C:\Windows\SysWOW64\cmd.exe
/c copy "C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
3⤵
PID:5104

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:4744

C:\Program Files (x86)\Rv8l\updatexfc8ftb.exe
"C:\Program Files (x86)\Rv8l\updatexfc8ftb.exe"
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3624

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Program Files (x86)\Rv8l\updatexfc8ftb.exe
Filesize
176KB

MD5
67dc61588f11f816b92690ea723fcd8e

SHA1
73fd5e1d4bc161d5aa803ed1db493ce7cbca5f75

SHA256
35876cb065b7b1a590a882ab9b85539d567043c53362208955f69093855e9ea9

SHA512
7995ff412f92a72eeffc14633d225fb0bb68bfb5c54f0babd13416be4e11ab035d7f4ea7875de42ddb9fd899f25810b56009ca8b26f6d88d255c59e6f1e89a01

Download Submit
C:\Program Files (x86)\Rv8l\updatexfc8ftb.exe
Filesize
176KB

MD5
67dc61588f11f816b92690ea723fcd8e

SHA1
73fd5e1d4bc161d5aa803ed1db493ce7cbca5f75

SHA256
35876cb065b7b1a590a882ab9b85539d567043c53362208955f69093855e9ea9

SHA512
7995ff412f92a72eeffc14633d225fb0bb68bfb5c54f0babd13416be4e11ab035d7f4ea7875de42ddb9fd899f25810b56009ca8b26f6d88d255c59e6f1e89a01

Download Submit
C:\Users\Admin\AppData\Local\Temp\DB1
Filesize
40KB

MD5
b608d407fc15adea97c26936bc6f03f6

SHA1
953e7420801c76393902c0d6bb56148947e41571

SHA256
b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

SHA512
cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

Download Submit
C:\Users\Admin\AppData\Local\Temp\DB1
Filesize
48KB

MD5
349e6eb110e34a08924d92f6b334801d

SHA1
bdfb289daff51890cc71697b6322aa4b35ec9169

SHA256
c9fd7be4579e4aa942e8c2b44ab10115fa6c2fe6afd0c584865413d9d53f3b2a

SHA512
2a635b815a5e117ea181ee79305ee1baf591459427acc5210d8c6c7e447be3513ead871c605eb3d32e4ab4111b2a335f26520d0ef8c1245a4af44e1faec44574

Download Submit
memory/1680-138-0x0000000000000000-mapping.dmp

Download
memory/2664-143-0x0000000007FB0000-0x00000000080F7000-memory.dmp

Filesize
1.3MB

Download
memory/2664-134-0x0000000002DE0000-0x0000000002EEE000-memory.dmp

Filesize
1.1MB

Download
memory/2664-141-0x0000000007FB0000-0x00000000080F7000-memory.dmp

Filesize
1.3MB

Download
memory/2720-144-0x0000000000000000-mapping.dmp

Download
memory/3624-151-0x0000000000DE0000-0x000000000112A000-memory.dmp

Filesize
3.3MB

Download
memory/3624-148-0x0000000000000000-mapping.dmp

Download
memory/3796-136-0x0000000000630000-0x0000000000642000-memory.dmp

Filesize
72KB

Download
memory/3796-142-0x0000000000150000-0x000000000017C000-memory.dmp

Filesize
176KB

Download
memory/3796-140-0x00000000020E0000-0x0000000002170000-memory.dmp

Filesize
576KB

Download
memory/3796-139-0x00000000022C0000-0x000000000260A000-memory.dmp

Filesize
3.3MB

Download
memory/3796-137-0x0000000000150000-0x000000000017C000-memory.dmp

Filesize
176KB

Download
memory/3796-135-0x0000000000000000-mapping.dmp

Download
memory/3848-132-0x0000000000FD0000-0x000000000131A000-memory.dmp

Filesize
3.3MB

Download
memory/3848-133-0x00000000008D0000-0x00000000008E1000-memory.dmp

Filesize
68KB

Download
memory/5104-146-0x0000000000000000-mapping.dmp

Download