formbook | 5897858ea935658dd34bc4ef2692d4694eea6be164a9d8566b55c769dae2c8bc

General

Target

vbc.exe
Size

1.6MB
MD5

52da53b1c61bf409b32f845f3806479a
SHA1

4e4120c159b2ff506c8719332dc38298ac092659
SHA256

5897858ea935658dd34bc4ef2692d4694eea6be164a9d8566b55c769dae2c8bc
SHA512

3a1ffa7db0f5b90deccbf9f84033e19ed43f9d28006f40c2c8d1cbe7c337f6fd458c966bef0b29c8f1cde725d1e1abfecb65c00b5ae6f908dcb33ecb83c7dbca

Score

10^/10

formbook xloader mt88 loader persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

xloader

Version

2.6

Campaign

mt88

Decoy

syzbf32.xyz

pertlines.com

vybaveniprocyklostezky.com

elianmsalas.tech

a-snag-tokei-kaitori.com

tuvistaing.com

whoyoucall.net

l8e9gr.xyz

sophrologuemontevrain77.com

ciclean.com

the-roel.com

campgreencove.com

foremostbookkeeping.com

zamanscorner.com

efeturozemniyet.com

penelope.team

murata.life

solfuls.com

tradefitinvesting.com

skinbid.pro

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/1480-134-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/1480-140-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/3400-144-0x0000000000BD0000-0x0000000000BFB000-memory.dmp	xloader
behavioral2/memory/3400-147-0x0000000000BD0000-0x0000000000BFB000-memory.dmp	xloader

Executes dropped EXE 1 IoCs

Processes:

b0hmx6hzly.exe

pid process

2712 b0hmx6hzly.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
2712	b0hmx6hzly.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ERWPYJE86F = "C:\\Program Files (x86)\\Kyfqlpbmx\\b0hmx6hzly.exe"	svchost.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.exeARP.EXEsvchost.exe

description	pid	process	target process
PID 1412 set thread context of 1480	1412	vbc.exe	ARP.EXE
PID 1480 set thread context of 2528	1480	ARP.EXE	Explorer.EXE
PID 3400 set thread context of 2528	3400	svchost.exe	Explorer.EXE

Drops file in Program Files directory 4 IoCs

Processes:

svchost.exeExplorer.EXE

description	ioc	process
File opened for modification	C:\Program Files (x86)\Kyfqlpbmx\b0hmx6hzly.exe	svchost.exe
File opened for modification	C:\Program Files (x86)\Kyfqlpbmx	Explorer.EXE
File created	C:\Program Files (x86)\Kyfqlpbmx\b0hmx6hzly.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\Kyfqlpbmx\b0hmx6hzly.exe	Explorer.EXE

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

svchost.exe

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

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

vbc.exeARP.EXEsvchost.exe

pid	process
1412	vbc.exe
1412	vbc.exe
1412	vbc.exe
1412	vbc.exe
1412	vbc.exe
1412	vbc.exe
1412	vbc.exe
1412	vbc.exe
1412	vbc.exe
1412	vbc.exe
1480	ARP.EXE
1480	ARP.EXE
1480	ARP.EXE
1480	ARP.EXE
1412	vbc.exe
1412	vbc.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2528 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

ARP.EXEsvchost.exe

pid process

1480 ARP.EXE
1480 ARP.EXE
1480 ARP.EXE
3400 svchost.exe
3400 svchost.exe
3400 svchost.exe
3400 svchost.exe

pid	process
2528	Explorer.EXE

pid	process
1480	ARP.EXE
1480	ARP.EXE
1480	ARP.EXE
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe
3400	svchost.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

Processes:

vbc.exeARP.EXEsvchost.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	1412	vbc.exe
Token: SeDebugPrivilege	1480	ARP.EXE
Token: SeDebugPrivilege	3400	svchost.exe
Token: SeShutdownPrivilege	2528	Explorer.EXE
Token: SeCreatePagefilePrivilege	2528	Explorer.EXE
Token: SeShutdownPrivilege	2528	Explorer.EXE
Token: SeCreatePagefilePrivilege	2528	Explorer.EXE
Token: SeShutdownPrivilege	2528	Explorer.EXE
Token: SeCreatePagefilePrivilege	2528	Explorer.EXE
Token: SeShutdownPrivilege	2528	Explorer.EXE
Token: SeCreatePagefilePrivilege	2528	Explorer.EXE

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

vbc.exeExplorer.EXEsvchost.exe

description	pid	process	target process
PID 1412 wrote to memory of 1532	1412	vbc.exe	efsui.exe
PID 1412 wrote to memory of 1532	1412	vbc.exe	efsui.exe
PID 1412 wrote to memory of 1532	1412	vbc.exe	efsui.exe
PID 1412 wrote to memory of 1480	1412	vbc.exe	ARP.EXE
PID 1412 wrote to memory of 1480	1412	vbc.exe	ARP.EXE
PID 1412 wrote to memory of 1480	1412	vbc.exe	ARP.EXE
PID 1412 wrote to memory of 1480	1412	vbc.exe	ARP.EXE
PID 1412 wrote to memory of 1480	1412	vbc.exe	ARP.EXE
PID 1412 wrote to memory of 1480	1412	vbc.exe	ARP.EXE
PID 1412 wrote to memory of 1480	1412	vbc.exe	ARP.EXE
PID 2528 wrote to memory of 3400	2528	Explorer.EXE	svchost.exe
PID 2528 wrote to memory of 3400	2528	Explorer.EXE	svchost.exe
PID 2528 wrote to memory of 3400	2528	Explorer.EXE	svchost.exe
PID 3400 wrote to memory of 4664	3400	svchost.exe	cmd.exe
PID 3400 wrote to memory of 4664	3400	svchost.exe	cmd.exe
PID 3400 wrote to memory of 4664	3400	svchost.exe	cmd.exe
PID 3400 wrote to memory of 3232	3400	svchost.exe	cmd.exe
PID 3400 wrote to memory of 3232	3400	svchost.exe	cmd.exe
PID 3400 wrote to memory of 3232	3400	svchost.exe	cmd.exe
PID 3400 wrote to memory of 2472	3400	svchost.exe	cmd.exe
PID 3400 wrote to memory of 2472	3400	svchost.exe	cmd.exe
PID 3400 wrote to memory of 2472	3400	svchost.exe	cmd.exe
PID 3400 wrote to memory of 3560	3400	svchost.exe	Firefox.exe
PID 3400 wrote to memory of 3560	3400	svchost.exe	Firefox.exe
PID 3400 wrote to memory of 3560	3400	svchost.exe	Firefox.exe
PID 2528 wrote to memory of 2712	2528	Explorer.EXE	b0hmx6hzly.exe
PID 2528 wrote to memory of 2712	2528	Explorer.EXE	b0hmx6hzly.exe
PID 2528 wrote to memory of 2712	2528	Explorer.EXE	b0hmx6hzly.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Program Files directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2528

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:1412

C:\Windows\SysWOW64\efsui.exe
"C:\Windows\SysWOW64\efsui.exe"
3⤵
PID:1532

C:\Windows\SysWOW64\ARP.EXE
"C:\Windows\SysWOW64\ARP.EXE"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1480

C:\Windows\SysWOW64\svchost.exe
"C:\Windows\SysWOW64\svchost.exe"
2⤵
- 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:3400

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\SysWOW64\ARP.EXE"
3⤵
PID:4664

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:3232

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:2472

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:3560

C:\Program Files (x86)\Kyfqlpbmx\b0hmx6hzly.exe
"C:\Program Files (x86)\Kyfqlpbmx\b0hmx6hzly.exe"
2⤵
- Executes dropped EXE
PID:2712

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

Scripting

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Kyfqlpbmx\b0hmx6hzly.exe

Filesize
22KB

MD5
4d3943edbc9c7e18dc3469a21b30b3ce

SHA1
534a42a7045ed26d11d00721a9542caca7f2b4ef

SHA256
f9c384659e3c66fb0af5f18d19a16ae11910aefd3beafe2170f937fd521e0391

SHA512
5d2bb83308c3d0612de54451b6852c61774dfc05904fa5f4b1160e044cfc5d63151f5821f6a970dbd399c28f75868b0933b7a60b2016df68edc40af85183efe2

Download Submit
C:\Program Files (x86)\Kyfqlpbmx\b0hmx6hzly.exe

Filesize
22KB

MD5
4d3943edbc9c7e18dc3469a21b30b3ce

SHA1
534a42a7045ed26d11d00721a9542caca7f2b4ef

SHA256
f9c384659e3c66fb0af5f18d19a16ae11910aefd3beafe2170f937fd521e0391

SHA512
5d2bb83308c3d0612de54451b6852c61774dfc05904fa5f4b1160e044cfc5d63151f5821f6a970dbd399c28f75868b0933b7a60b2016df68edc40af85183efe2

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/1412-130-0x0000000000860000-0x0000000000A02000-memory.dmp

Filesize
1.6MB

Download
memory/1412-131-0x0000000005450000-0x00000000054EC000-memory.dmp

Filesize
624KB

Download
memory/1480-134-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1480-136-0x0000000001550000-0x000000000189A000-memory.dmp

Filesize
3.3MB

Download
memory/1480-137-0x00000000019F0000-0x0000000001A01000-memory.dmp

Filesize
68KB

Download
memory/1480-133-0x0000000000000000-mapping.dmp

Download
memory/1480-140-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1532-132-0x0000000000000000-mapping.dmp

Download
memory/2472-151-0x0000000000000000-mapping.dmp

Download
memory/2528-148-0x0000000007750000-0x000000000789E000-memory.dmp

Filesize
1.3MB

Download
memory/2528-146-0x0000000007750000-0x000000000789E000-memory.dmp

Filesize
1.3MB

Download
memory/2528-138-0x0000000007660000-0x000000000774C000-memory.dmp

Filesize
944KB

Download
memory/2712-153-0x0000000000000000-mapping.dmp

Download
memory/3232-149-0x0000000000000000-mapping.dmp

Download
memory/3400-147-0x0000000000BD0000-0x0000000000BFB000-memory.dmp

Filesize
172KB

Download
memory/3400-145-0x00000000016F0000-0x0000000001780000-memory.dmp

Filesize
576KB

Download
memory/3400-142-0x0000000000110000-0x000000000011E000-memory.dmp

Filesize
56KB

Download
memory/3400-144-0x0000000000BD0000-0x0000000000BFB000-memory.dmp

Filesize
172KB

Download
memory/3400-143-0x0000000001800000-0x0000000001B4A000-memory.dmp

Filesize
3.3MB

Download
memory/3400-139-0x0000000000000000-mapping.dmp

Download
memory/4664-141-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads