formbook | d0c85ba5e6d88e1e0b5f068f125829b4e224b90be2488f2c21317447dc51fb9e

General

Target

vbc.exe
Size

757KB
MD5

1f65d7826fbcc2d6c50f6c493c901588
SHA1

4290f6b300595e807e8cacd5ff172b0a0f37c845
SHA256

d0c85ba5e6d88e1e0b5f068f125829b4e224b90be2488f2c21317447dc51fb9e
SHA512

e3c15d0229433441300b4e129748c10e966de22c926d641b665a91caf7c371a390004abc24d953a80887be4a791514e1670cb0e8723d6a19ffa5210cd9124f5a

Score

10^/10

formbook xloader v4qp loader persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

xloader

Version

2.9

Campaign

v4qp

Decoy

je1XQKU1LfJPVLk=

nvf41a7FsTLs6uB/g+CR

U7mryF6DctZn6GEjr9Bm4g==

1SONGrPdh7wGEOXp3g==

2xX859r7qOFq7GYkr9Bm4g==

IYtzVUx0Oo0HmZawLQAARDvBf4dL

NH3iuBPNSzZTvpw/4KaG

rDehfiqIPbdMBS8G1g==

xhb2uJ0eBwo7k3djqxh60xoNt4VoeQ==

AFtKux3JgPGRkx3xUsciR6piSg==

m+3VoJadWcBvOAPpzKUNPoAxyplS

1DWKULdka3mxIKhEqGxQr7gxyplS

DGlFGBqWi5CtrCX9alyTuPzq

muvVM4slyTfxORwAZisVksCM78aSEVo=

D3biNgUbyg9E5pl+

/+1QLPssvl/Xxg==

I4lzTjaAcc1iBS8G1g==

wSwc4MmbShojhlZCrniTuPzq

jN5YO6ZXSfJPVLk=

4TUS4+ANuqHCRTM9sniTuPzq

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
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 FormBook CnC Checkin (POST) M2
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
suricata

Xloader Payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/3196-136-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/3196-142-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/1608-146-0x0000000000F00000-0x0000000000F2C000-memory.dmp	xloader
behavioral2/memory/1608-149-0x0000000000F00000-0x0000000000F2C000-memory.dmp	xloader

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

netsh.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	netsh.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\HFFHBBOX = "C:\\Program Files (x86)\\Td8e4_\\chkdsku6o.exe"	netsh.exe

Executes dropped EXE 1 IoCs

Processes:

chkdsku6o.exe

pid process

2900 chkdsku6o.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:

vbc.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation vbc.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
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

pid	process
2900	chkdsku6o.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	vbc.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.exevbc.exenetsh.exe

description	pid	process	target process
PID 4888 set thread context of 3196	4888	vbc.exe	vbc.exe
PID 3196 set thread context of 2416	3196	vbc.exe	Explorer.EXE
PID 1608 set thread context of 2416	1608	netsh.exe	Explorer.EXE

Drops file in Program Files directory 4 IoCs

Processes:

netsh.exeExplorer.EXE

description	ioc	process
File opened for modification	C:\Program Files (x86)\Td8e4_\chkdsku6o.exe	netsh.exe
File opened for modification	C:\Program Files (x86)\Td8e4_	Explorer.EXE
File created	C:\Program Files (x86)\Td8e4_\chkdsku6o.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\Td8e4_\chkdsku6o.exe	Explorer.EXE

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

netsh.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	netsh.exe

Suspicious behavior: EnumeratesProcesses 47 IoCs

Processes:

vbc.exevbc.exenetsh.exe

pid	process
4888	vbc.exe
3196	vbc.exe
3196	vbc.exe
3196	vbc.exe
3196	vbc.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2416 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

vbc.exenetsh.exe

pid process

3196 vbc.exe
3196 vbc.exe
3196 vbc.exe
1608 netsh.exe
1608 netsh.exe
1608 netsh.exe
1608 netsh.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vbc.exevbc.exenetsh.exe

description pid process

Token: SeDebugPrivilege 4888 vbc.exe
Token: SeDebugPrivilege 3196 vbc.exe
Token: SeDebugPrivilege 1608 netsh.exe

pid	process
2416	Explorer.EXE

pid	process
3196	vbc.exe
3196	vbc.exe
3196	vbc.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe
1608	netsh.exe

description	pid	process
Token: SeDebugPrivilege	4888	vbc.exe
Token: SeDebugPrivilege	3196	vbc.exe
Token: SeDebugPrivilege	1608	netsh.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

vbc.exeExplorer.EXEnetsh.exe

description	pid	process	target process
PID 4888 wrote to memory of 3196	4888	vbc.exe	vbc.exe
PID 4888 wrote to memory of 3196	4888	vbc.exe	vbc.exe
PID 4888 wrote to memory of 3196	4888	vbc.exe	vbc.exe
PID 4888 wrote to memory of 3196	4888	vbc.exe	vbc.exe
PID 4888 wrote to memory of 3196	4888	vbc.exe	vbc.exe
PID 4888 wrote to memory of 3196	4888	vbc.exe	vbc.exe
PID 2416 wrote to memory of 1608	2416	Explorer.EXE	netsh.exe
PID 2416 wrote to memory of 1608	2416	Explorer.EXE	netsh.exe
PID 2416 wrote to memory of 1608	2416	Explorer.EXE	netsh.exe
PID 1608 wrote to memory of 4508	1608	netsh.exe	cmd.exe
PID 1608 wrote to memory of 4508	1608	netsh.exe	cmd.exe
PID 1608 wrote to memory of 4508	1608	netsh.exe	cmd.exe
PID 1608 wrote to memory of 4724	1608	netsh.exe	cmd.exe
PID 1608 wrote to memory of 4724	1608	netsh.exe	cmd.exe
PID 1608 wrote to memory of 4724	1608	netsh.exe	cmd.exe
PID 1608 wrote to memory of 2672	1608	netsh.exe	cmd.exe
PID 1608 wrote to memory of 2672	1608	netsh.exe	cmd.exe
PID 1608 wrote to memory of 2672	1608	netsh.exe	cmd.exe
PID 1608 wrote to memory of 4700	1608	netsh.exe	Firefox.exe
PID 1608 wrote to memory of 4700	1608	netsh.exe	Firefox.exe
PID 1608 wrote to memory of 4700	1608	netsh.exe	Firefox.exe
PID 2416 wrote to memory of 2900	2416	Explorer.EXE	chkdsku6o.exe
PID 2416 wrote to memory of 2900	2416	Explorer.EXE	chkdsku6o.exe
PID 2416 wrote to memory of 2900	2416	Explorer.EXE	chkdsku6o.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Program Files directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2416

C:\Users\Admin\AppData\Local\Temp\vbc.exe
"C:\Users\Admin\AppData\Local\Temp\vbc.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4888

C:\Users\Admin\AppData\Local\Temp\vbc.exe
"{path}"
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3196

C:\Windows\SysWOW64\autoconv.exe
"C:\Windows\SysWOW64\autoconv.exe"
2⤵
PID:4864

C:\Windows\SysWOW64\autoconv.exe
"C:\Windows\SysWOW64\autoconv.exe"
2⤵
PID:4184

C:\Windows\SysWOW64\autoconv.exe
"C:\Windows\SysWOW64\autoconv.exe"
2⤵
PID:5040

C:\Windows\SysWOW64\netsh.exe
"C:\Windows\SysWOW64\netsh.exe"
2⤵
- Adds policy 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:1608

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\vbc.exe"
3⤵
PID:4508

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:4724

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:2672

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:4700

C:\Program Files (x86)\Td8e4_\chkdsku6o.exe
"C:\Program Files (x86)\Td8e4_\chkdsku6o.exe"
2⤵
- Executes dropped EXE
PID:2900

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Scripting

1

T1064

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Program Files (x86)\Td8e4_\chkdsku6o.exe
Filesize
757KB

MD5
1f65d7826fbcc2d6c50f6c493c901588

SHA1
4290f6b300595e807e8cacd5ff172b0a0f37c845

SHA256
d0c85ba5e6d88e1e0b5f068f125829b4e224b90be2488f2c21317447dc51fb9e

SHA512
e3c15d0229433441300b4e129748c10e966de22c926d641b665a91caf7c371a390004abc24d953a80887be4a791514e1670cb0e8723d6a19ffa5210cd9124f5a

Download Submit
C:\Program Files (x86)\Td8e4_\chkdsku6o.exe
Filesize
757KB

MD5
1f65d7826fbcc2d6c50f6c493c901588

SHA1
4290f6b300595e807e8cacd5ff172b0a0f37c845

SHA256
d0c85ba5e6d88e1e0b5f068f125829b4e224b90be2488f2c21317447dc51fb9e

SHA512
e3c15d0229433441300b4e129748c10e966de22c926d641b665a91caf7c371a390004abc24d953a80887be4a791514e1670cb0e8723d6a19ffa5210cd9124f5a

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/1608-141-0x0000000000000000-mapping.dmp

Download
memory/1608-145-0x00000000018A0000-0x0000000001BEA000-memory.dmp

Filesize
3.3MB

Download
memory/1608-144-0x0000000000F30000-0x0000000000F4E000-memory.dmp

Filesize
120KB

Download
memory/1608-147-0x00000000016D0000-0x0000000001760000-memory.dmp

Filesize
576KB

Download
memory/1608-149-0x0000000000F00000-0x0000000000F2C000-memory.dmp

Filesize
176KB

Download
memory/1608-146-0x0000000000F00000-0x0000000000F2C000-memory.dmp

Filesize
176KB

Download
memory/2416-140-0x0000000003780000-0x00000000038FF000-memory.dmp

Filesize
1.5MB

Download
memory/2416-150-0x0000000008570000-0x0000000008644000-memory.dmp

Filesize
848KB

Download
memory/2416-148-0x0000000008570000-0x0000000008644000-memory.dmp

Filesize
848KB

Download
memory/2672-153-0x0000000000000000-mapping.dmp

Download
memory/2900-155-0x0000000000000000-mapping.dmp

Download
memory/3196-136-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/3196-142-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/3196-139-0x0000000001A00000-0x0000000001A11000-memory.dmp

Filesize
68KB

Download
memory/3196-138-0x0000000001A20000-0x0000000001D6A000-memory.dmp

Filesize
3.3MB

Download
memory/3196-135-0x0000000000000000-mapping.dmp

Download
memory/4508-143-0x0000000000000000-mapping.dmp

Download
memory/4724-151-0x0000000000000000-mapping.dmp

Download
memory/4888-130-0x0000000000150000-0x0000000000214000-memory.dmp

Filesize
784KB

Download
memory/4888-134-0x0000000004BC0000-0x0000000004BCA000-memory.dmp

Filesize
40KB

Download
memory/4888-133-0x0000000004CF0000-0x0000000004D8C000-memory.dmp

Filesize
624KB

Download
memory/4888-132-0x0000000004C50000-0x0000000004CE2000-memory.dmp

Filesize
584KB

Download
memory/4888-131-0x0000000005160000-0x0000000005704000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads