formbook | bc3a9a02daa782f52ec830c499b4c6b262a462f5f6c3f05dce1bfe14183be54e

General

Target

Salary.exe
Size

352KB
MD5

6d5f3175c300da6ea8a6875a4682edd9
SHA1

ebf2ab3c7fa3cd6f3dcb16e8d1f8faedb16bd7e6
SHA256

4f5081f499127a975be464ff8bb659d88a455cf17da0579c20732097507b6226
SHA512

5dcddce714ce32048466d51d59fcfa84e2949ae01f3b8f0add3f871e03b80f964649963f51ea62bff190bb16fdb0e31bf3802f3fa33d4fc5b1c604da9399720d

Score

10^/10

formbook g8u persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.0

Campaign

g8u

Decoy

stuition.com

mj-sculpture.com

cannatainmentevents.com

dianjintang.com

rmlusitania.info

effet-spiruline.com

flatheme.com

supergaminator-vip.com

craftyourmagic.com

lakai.ltd

electionshawaii.com

iqpdct.com

thebestfourstarhotels.com

satoshiceo.com

saintmartiner.com

brothersmarinetoronto.com

citicoin.online

scentsationalsniffers.com

hellonighbourgameees.com

displayonline-france.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 2 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/3948-135-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral2/memory/4588-142-0x0000000000C90000-0x0000000000CBD000-memory.dmp	formbook

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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

WWAHost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\WZM8FTBPC = "C:\\Program Files (x86)\\Vet70ef_\\txblpx.exe"	WWAHost.exe
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	WWAHost.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

Salary.exeSalary.exeWWAHost.exe

description	pid	process	target process
PID 4956 set thread context of 3948	4956	Salary.exe	Salary.exe
PID 3948 set thread context of 3144	3948	Salary.exe	Explorer.EXE
PID 4588 set thread context of 3144	4588	WWAHost.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

WWAHost.exe

description ioc process

File opened for modification C:\Program Files (x86)\Vet70ef_\txblpx.exe WWAHost.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Vet70ef_\txblpx.exe	WWAHost.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

WWAHost.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	WWAHost.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

Salary.exeWWAHost.exe

pid	process
3948	Salary.exe
3948	Salary.exe
3948	Salary.exe
3948	Salary.exe
4588	WWAHost.exe
4588	WWAHost.exe
4588	WWAHost.exe
4588	WWAHost.exe
4588	WWAHost.exe
4588	WWAHost.exe
4588	WWAHost.exe
4588	WWAHost.exe
4588	WWAHost.exe
4588	WWAHost.exe
4588	WWAHost.exe
4588	WWAHost.exe
4588	WWAHost.exe
4588	WWAHost.exe
4588	WWAHost.exe
4588	WWAHost.exe
4588	WWAHost.exe
4588	WWAHost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3144 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

Salary.exeWWAHost.exe

pid process

3948 Salary.exe
3948 Salary.exe
3948 Salary.exe
4588 WWAHost.exe
4588 WWAHost.exe

pid	process
3144	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

Salary.exeWWAHost.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	3948	Salary.exe
Token: SeDebugPrivilege	4588	WWAHost.exe
Token: SeShutdownPrivilege	3144	Explorer.EXE
Token: SeCreatePagefilePrivilege	3144	Explorer.EXE
Token: SeShutdownPrivilege	3144	Explorer.EXE
Token: SeCreatePagefilePrivilege	3144	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

Salary.exeExplorer.EXEWWAHost.exe

description	pid	process	target process
PID 4956 wrote to memory of 3948	4956	Salary.exe	Salary.exe
PID 4956 wrote to memory of 3948	4956	Salary.exe	Salary.exe
PID 4956 wrote to memory of 3948	4956	Salary.exe	Salary.exe
PID 4956 wrote to memory of 3948	4956	Salary.exe	Salary.exe
PID 4956 wrote to memory of 3948	4956	Salary.exe	Salary.exe
PID 4956 wrote to memory of 3948	4956	Salary.exe	Salary.exe
PID 3144 wrote to memory of 4588	3144	Explorer.EXE	WWAHost.exe
PID 3144 wrote to memory of 4588	3144	Explorer.EXE	WWAHost.exe
PID 3144 wrote to memory of 4588	3144	Explorer.EXE	WWAHost.exe
PID 4588 wrote to memory of 4740	4588	WWAHost.exe	cmd.exe
PID 4588 wrote to memory of 4740	4588	WWAHost.exe	cmd.exe
PID 4588 wrote to memory of 4740	4588	WWAHost.exe	cmd.exe
PID 4588 wrote to memory of 2120	4588	WWAHost.exe	cmd.exe
PID 4588 wrote to memory of 2120	4588	WWAHost.exe	cmd.exe
PID 4588 wrote to memory of 2120	4588	WWAHost.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3144

C:\Users\Admin\AppData\Local\Temp\Salary.exe
"C:\Users\Admin\AppData\Local\Temp\Salary.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4956

C:\Users\Admin\AppData\Local\Temp\Salary.exe
"C:\Users\Admin\AppData\Local\Temp\Salary.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3948

C:\Windows\SysWOW64\WWAHost.exe
"C:\Windows\SysWOW64\WWAHost.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:4588

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\Salary.exe"
3⤵
PID:4740

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:2120

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

2

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

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

MD5
b608d407fc15adea97c26936bc6f03f6

SHA1
953e7420801c76393902c0d6bb56148947e41571

SHA256
b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

SHA512
cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

Download Submit
memory/2120-147-0x0000000000000000-mapping.dmp

Download
memory/3144-139-0x0000000002760000-0x0000000002854000-memory.dmp

Filesize
976KB

Download
memory/3144-146-0x0000000007EF0000-0x0000000008040000-memory.dmp

Filesize
1.3MB

Download
memory/3948-134-0x0000000000000000-mapping.dmp

Download
memory/3948-135-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/3948-136-0x0000000001950000-0x0000000001C9A000-memory.dmp

Filesize
3.3MB

Download
memory/3948-138-0x0000000001470000-0x0000000001484000-memory.dmp

Filesize
80KB

Download
memory/4588-145-0x0000000001570000-0x0000000001603000-memory.dmp

Filesize
588KB

Download
memory/4588-140-0x0000000000000000-mapping.dmp

Download
memory/4588-141-0x00000000004A0000-0x000000000057C000-memory.dmp

Filesize
880KB

Download
memory/4588-142-0x0000000000C90000-0x0000000000CBD000-memory.dmp

Filesize
180KB

Download
memory/4588-144-0x0000000001830000-0x0000000001B7A000-memory.dmp

Filesize
3.3MB

Download
memory/4740-143-0x0000000000000000-mapping.dmp

Download
memory/4956-130-0x00000000008D0000-0x000000000092E000-memory.dmp

Filesize
376KB

Download
memory/4956-133-0x0000000005430000-0x00000000054CC000-memory.dmp

Filesize
624KB

Download
memory/4956-132-0x00000000052F0000-0x0000000005382000-memory.dmp

Filesize
584KB

Download
memory/4956-131-0x00000000057D0000-0x0000000005D74000-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