formbook | c4b4ddf8aec0347fd4640a12009f51ba60ed1b202e18b421a3faef74bfe18ea1

General

Target

Factura de proforma.exe
Size

973KB
MD5

3b28cc0c40a9122c19279e34ede6b2a6
SHA1

2c97655615b623605be40e708295e12499674640
SHA256

c4b4ddf8aec0347fd4640a12009f51ba60ed1b202e18b421a3faef74bfe18ea1
SHA512

95fc3c78c572285fa8b13993dab2cf25e5c2efbe6aa40930c7745d5b3f3bdecb14a51f6a3f78ac66ec5307b7a97d4843615f78639b5d815f16b4b31e086e3d08

Score

10^/10

formbook bc3s persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

bc3s

C2

http://www.topei-products.com/bc3s/

Decoy

anna-ng.com

mariangelamata.com

szqnbl.com

nesherguitars.com

mysekrit.com

againbeautyviensui.xyz

appf.life

bilalsolution.com

technoratii.com

11restoran.com

birthingly.com

crystalcarrillo.com

cohenasset.info

bunchofdesign.com

highstreetmag.com

talentkerning.com

outdoor-glassesadvice.com

aliceeety.com

habbuhot.info

pao91.com

Signatures

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

Formbook Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/840-117-0x0000000000000000-mapping.dmp	formbook
behavioral2/memory/840-120-0x0000000072480000-0x00000000724AE000-memory.dmp	formbook
behavioral2/memory/516-126-0x00000000004F0000-0x000000000051E000-memory.dmp	formbook

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Factura de proforma.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows\CurrentVersion\Run\Tfiudl = "C:\\Users\\Public\\lduifT.url"	Factura de proforma.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

secinit.exehelp.exe

description	pid	process	target process
PID 840 set thread context of 3028	840	secinit.exe	Explorer.EXE
PID 516 set thread context of 3028	516	help.exe	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 56 IoCs

Processes:

secinit.exehelp.exe

pid	process
840	secinit.exe
840	secinit.exe
840	secinit.exe
840	secinit.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe
516	help.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3028 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

secinit.exehelp.exe

pid process

840 secinit.exe
840 secinit.exe
840 secinit.exe
516 help.exe
516 help.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

secinit.exehelp.exe

description pid process

Token: SeDebugPrivilege 840 secinit.exe
Token: SeDebugPrivilege 516 help.exe

pid	process
3028	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	840	secinit.exe
Token: SeDebugPrivilege	516	help.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

Factura de proforma.exeExplorer.EXEhelp.exe

description	pid	process	target process
PID 3568 wrote to memory of 840	3568	Factura de proforma.exe	secinit.exe
PID 3568 wrote to memory of 840	3568	Factura de proforma.exe	secinit.exe
PID 3568 wrote to memory of 840	3568	Factura de proforma.exe	secinit.exe
PID 3568 wrote to memory of 840	3568	Factura de proforma.exe	secinit.exe
PID 3568 wrote to memory of 840	3568	Factura de proforma.exe	secinit.exe
PID 3568 wrote to memory of 840	3568	Factura de proforma.exe	secinit.exe
PID 3028 wrote to memory of 516	3028	Explorer.EXE	help.exe
PID 3028 wrote to memory of 516	3028	Explorer.EXE	help.exe
PID 3028 wrote to memory of 516	3028	Explorer.EXE	help.exe
PID 516 wrote to memory of 3168	516	help.exe	cmd.exe
PID 516 wrote to memory of 3168	516	help.exe	cmd.exe
PID 516 wrote to memory of 3168	516	help.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3028

C:\Users\Admin\AppData\Local\Temp\Factura de proforma.exe
"C:\Users\Admin\AppData\Local\Temp\Factura de proforma.exe"
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3568

C:\Windows\SysWOW64\secinit.exe
C:\Windows\System32\secinit.exe
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:840

C:\Windows\SysWOW64\help.exe
"C:\Windows\SysWOW64\help.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:516

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\SysWOW64\secinit.exe"
3⤵
PID:3168

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/516-124-0x0000000000000000-mapping.dmp

Download
memory/516-129-0x0000000000AC0000-0x0000000000B53000-memory.dmp

Filesize
588KB

Download
memory/516-128-0x0000000000C60000-0x0000000000F80000-memory.dmp

Filesize
3.1MB

Download
memory/516-126-0x00000000004F0000-0x000000000051E000-memory.dmp

Filesize
184KB

Download
memory/516-125-0x0000000000FD0000-0x0000000000FD7000-memory.dmp

Filesize
28KB

Download
memory/840-120-0x0000000072480000-0x00000000724AE000-memory.dmp

Filesize
184KB

Download
memory/840-122-0x0000000004700000-0x0000000004714000-memory.dmp

Filesize
80KB

Download
memory/840-121-0x00000000043E0000-0x0000000004700000-memory.dmp

Filesize
3.1MB

Download
memory/840-119-0x0000000002A80000-0x0000000002A81000-memory.dmp

Filesize
4KB

Download
memory/840-117-0x0000000000000000-mapping.dmp

Download
memory/3028-123-0x0000000006B20000-0x0000000006CBA000-memory.dmp

Filesize
1.6MB

Download
memory/3028-130-0x0000000001050000-0x0000000001124000-memory.dmp

Filesize
848KB

Download
memory/3168-127-0x0000000000000000-mapping.dmp

Download
memory/3568-115-0x0000000002121000-0x0000000002135000-memory.dmp

Filesize
80KB

Download
memory/3568-116-0x0000000000950000-0x0000000000951000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads