formbook | 745e00e4a43761d5c4be5e29a539cda4e8ca2a45755b44e35321ced4a8d400c3

General

Target

YEw0N670fLb3Qwz.exe
Size

445KB
MD5

767febc4e7ba132342b5271a06a370c8
SHA1

3997eb76ba7da530ef6624d37d6218bf89400159
SHA256

0b6acf8d9861c0c69b88b7a7bf1427c5245bbd968e96db1cdb08b8432442c729
SHA512

5d3ff4c987aa5dce84b2ef944214149a2e1723f140182331e5693fc548fbb3c6026a55dc37eeb4ccc55b1173a76c9bebf0d3d7f26179ef99583fc2abf32d5120

Score

10^/10

formbook cdm persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.0

Campaign

cdm

Decoy

ldren.net

smtpsystem.com

elbastonazul.com

clickmailservice.com

housesearch.today

jingwei-pingtai.com

briankarenontour.com

wwwjinsha520.com

greenhouseci.net

cyberexpo.events

soundepict.com

hansardtracker.com

abenaasare.net

policemoviefestival.com

cryptocurrencyrocks.money

carliequinnesthetician.com

finestmilan.com

diclar.com

thependletonsurfclub.com

raku.party

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/3564-136-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral2/memory/3564-138-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral2/memory/428-144-0x00000000012B0000-0x00000000012DD000-memory.dmp	formbook

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wlanext.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	wlanext.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ZRXDDL2H8J = "C:\\Program Files (x86)\\Zglrpft\\mfcuv1.exe"	wlanext.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

YEw0N670fLb3Qwz.exeYEw0N670fLb3Qwz.exewlanext.exe

description	pid	process	target process
PID 688 set thread context of 3564	688	YEw0N670fLb3Qwz.exe	YEw0N670fLb3Qwz.exe
PID 3564 set thread context of 2640	3564	YEw0N670fLb3Qwz.exe	Explorer.EXE
PID 428 set thread context of 2640	428	wlanext.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

wlanext.exe

description ioc process

File opened for modification C:\Program Files (x86)\Zglrpft\mfcuv1.exe wlanext.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Zglrpft\mfcuv1.exe	wlanext.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

wlanext.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	wlanext.exe

Suspicious behavior: EnumeratesProcesses 43 IoCs

Processes:

YEw0N670fLb3Qwz.exeYEw0N670fLb3Qwz.exewlanext.exe

pid	process
688	YEw0N670fLb3Qwz.exe
688	YEw0N670fLb3Qwz.exe
688	YEw0N670fLb3Qwz.exe
3564	YEw0N670fLb3Qwz.exe
3564	YEw0N670fLb3Qwz.exe
3564	YEw0N670fLb3Qwz.exe
3564	YEw0N670fLb3Qwz.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe
428	wlanext.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2640 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

YEw0N670fLb3Qwz.exewlanext.exe

pid process

3564 YEw0N670fLb3Qwz.exe
3564 YEw0N670fLb3Qwz.exe
3564 YEw0N670fLb3Qwz.exe
428 wlanext.exe
428 wlanext.exe

pid	process
2640	Explorer.EXE

pid	process
3564	YEw0N670fLb3Qwz.exe
3564	YEw0N670fLb3Qwz.exe
3564	YEw0N670fLb3Qwz.exe
428	wlanext.exe
428	wlanext.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

YEw0N670fLb3Qwz.exeYEw0N670fLb3Qwz.exewlanext.exe

description	pid	process
Token: SeDebugPrivilege	688	YEw0N670fLb3Qwz.exe
Token: SeDebugPrivilege	3564	YEw0N670fLb3Qwz.exe
Token: SeDebugPrivilege	428	wlanext.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

YEw0N670fLb3Qwz.exeExplorer.EXEwlanext.exe

description	pid	process	target process
PID 688 wrote to memory of 3564	688	YEw0N670fLb3Qwz.exe	YEw0N670fLb3Qwz.exe
PID 688 wrote to memory of 3564	688	YEw0N670fLb3Qwz.exe	YEw0N670fLb3Qwz.exe
PID 688 wrote to memory of 3564	688	YEw0N670fLb3Qwz.exe	YEw0N670fLb3Qwz.exe
PID 688 wrote to memory of 3564	688	YEw0N670fLb3Qwz.exe	YEw0N670fLb3Qwz.exe
PID 688 wrote to memory of 3564	688	YEw0N670fLb3Qwz.exe	YEw0N670fLb3Qwz.exe
PID 688 wrote to memory of 3564	688	YEw0N670fLb3Qwz.exe	YEw0N670fLb3Qwz.exe
PID 2640 wrote to memory of 428	2640	Explorer.EXE	wlanext.exe
PID 2640 wrote to memory of 428	2640	Explorer.EXE	wlanext.exe
PID 2640 wrote to memory of 428	2640	Explorer.EXE	wlanext.exe
PID 428 wrote to memory of 2524	428	wlanext.exe	cmd.exe
PID 428 wrote to memory of 2524	428	wlanext.exe	cmd.exe
PID 428 wrote to memory of 2524	428	wlanext.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2640

C:\Users\Admin\AppData\Local\Temp\YEw0N670fLb3Qwz.exe
"C:\Users\Admin\AppData\Local\Temp\YEw0N670fLb3Qwz.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:688

C:\Users\Admin\AppData\Local\Temp\YEw0N670fLb3Qwz.exe
"{path}"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3564

C:\Windows\SysWOW64\wlanext.exe
"C:\Windows\SysWOW64\wlanext.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:428

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\YEw0N670fLb3Qwz.exe"
3⤵
PID:2524

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/428-142-0x0000000000000000-mapping.dmp

Download
memory/428-147-0x0000000001830000-0x00000000018C3000-memory.dmp

Filesize
588KB

Download
memory/428-146-0x0000000001AA0000-0x0000000001DEA000-memory.dmp

Filesize
3.3MB

Download
memory/428-144-0x00000000012B0000-0x00000000012DD000-memory.dmp

Filesize
180KB

Download
memory/428-143-0x0000000000770000-0x0000000000787000-memory.dmp

Filesize
92KB

Download
memory/688-134-0x00000000053A0000-0x000000000543C000-memory.dmp

Filesize
624KB

Download
memory/688-130-0x0000000000710000-0x0000000000786000-memory.dmp

Filesize
472KB

Download
memory/688-133-0x00000000052E0000-0x00000000052EA000-memory.dmp

Filesize
40KB

Download
memory/688-132-0x0000000005150000-0x00000000051E2000-memory.dmp

Filesize
584KB

Download
memory/688-131-0x0000000005660000-0x0000000005C04000-memory.dmp

Filesize
5.6MB

Download
memory/2524-145-0x0000000000000000-mapping.dmp

Download
memory/2640-141-0x0000000008F20000-0x00000000090B4000-memory.dmp

Filesize
1.6MB

Download
memory/2640-148-0x00000000030B0000-0x00000000031A9000-memory.dmp

Filesize
996KB

Download
memory/3564-136-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/3564-138-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/3564-139-0x0000000001A90000-0x0000000001DDA000-memory.dmp

Filesize
3.3MB

Download
memory/3564-140-0x0000000001970000-0x0000000001984000-memory.dmp

Filesize
80KB

Download
memory/3564-135-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads