formbook | 5b8a341d18803152d2be2af3313830091764943deaad2e391907c0b23e521e50

General

Target

Salary.exe
Size

301KB
MD5

cddc72c9292768f8719c1e5127a9997d
SHA1

5ae294116d27d67b2c3cee4b0b1b79ecbd25d582
SHA256

f3f3cda95f4d655f189381268676beef7ab70ed8355ff178abcad416c71adb22
SHA512

240c7a82c7b848f59aef3e09c01eca8d97c853ae7bf1270dea844835876019d8ee9eac83c5d7bc2ad56bdddd8853c6877a3a5c79ec0ba504eb4e8cb1200a49c1

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/2256-135-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral2/memory/380-142-0x0000000000A00000-0x0000000000A2D000-memory.dmp	formbook

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

chkdsk.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	chkdsk.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\NTQL4HT06P = "C:\\Program Files (x86)\\Cspxt\\dv2dufwvx4.exe"	chkdsk.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

Suspicious use of SetThreadContext 3 IoCs

Processes:

Salary.exeSalary.exechkdsk.exe

description	pid	process	target process
PID 5012 set thread context of 2256	5012	Salary.exe	Salary.exe
PID 2256 set thread context of 384	2256	Salary.exe	Explorer.EXE
PID 380 set thread context of 384	380	chkdsk.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

chkdsk.exe

description ioc process

File opened for modification C:\Program Files (x86)\Cspxt\dv2dufwvx4.exe chkdsk.exe
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

chkdsk.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier chkdsk.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Cspxt\dv2dufwvx4.exe	chkdsk.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

chkdsk.exe

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

Suspicious behavior: EnumeratesProcesses 16 IoCs

Processes:

Salary.exechkdsk.exe

pid	process
2256	Salary.exe
2256	Salary.exe
2256	Salary.exe
2256	Salary.exe
380	chkdsk.exe
380	chkdsk.exe
380	chkdsk.exe
380	chkdsk.exe
380	chkdsk.exe
380	chkdsk.exe
380	chkdsk.exe
380	chkdsk.exe
380	chkdsk.exe
380	chkdsk.exe
380	chkdsk.exe
380	chkdsk.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

Salary.exechkdsk.exe

pid process

2256 Salary.exe
2256 Salary.exe
2256 Salary.exe
380 chkdsk.exe
380 chkdsk.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Salary.exechkdsk.exe

description pid process

Token: SeDebugPrivilege 2256 Salary.exe
Token: SeDebugPrivilege 380 chkdsk.exe

description	pid	process
Token: SeDebugPrivilege	2256	Salary.exe
Token: SeDebugPrivilege	380	chkdsk.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

Salary.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 5012 wrote to memory of 2256	5012	Salary.exe	Salary.exe
PID 5012 wrote to memory of 2256	5012	Salary.exe	Salary.exe
PID 5012 wrote to memory of 2256	5012	Salary.exe	Salary.exe
PID 5012 wrote to memory of 2256	5012	Salary.exe	Salary.exe
PID 5012 wrote to memory of 2256	5012	Salary.exe	Salary.exe
PID 5012 wrote to memory of 2256	5012	Salary.exe	Salary.exe
PID 384 wrote to memory of 380	384	Explorer.EXE	chkdsk.exe
PID 384 wrote to memory of 380	384	Explorer.EXE	chkdsk.exe
PID 384 wrote to memory of 380	384	Explorer.EXE	chkdsk.exe
PID 380 wrote to memory of 4236	380	chkdsk.exe	cmd.exe
PID 380 wrote to memory of 4236	380	chkdsk.exe	cmd.exe
PID 380 wrote to memory of 4236	380	chkdsk.exe	cmd.exe
PID 380 wrote to memory of 5084	380	chkdsk.exe	cmd.exe
PID 380 wrote to memory of 5084	380	chkdsk.exe	cmd.exe
PID 380 wrote to memory of 5084	380	chkdsk.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:384

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:5012

C:\Users\Admin\AppData\Local\Temp\Salary.exe
"{path}"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:2256

C:\Windows\SysWOW64\autochk.exe
"C:\Windows\SysWOW64\autochk.exe"
2⤵
PID:1656

C:\Windows\SysWOW64\autochk.exe
"C:\Windows\SysWOW64\autochk.exe"
2⤵
PID:2176

C:\Windows\SysWOW64\autochk.exe
"C:\Windows\SysWOW64\autochk.exe"
2⤵
PID:3772

C:\Windows\SysWOW64\autochk.exe
"C:\Windows\SysWOW64\autochk.exe"
2⤵
PID:2284

C:\Windows\SysWOW64\chkdsk.exe
"C:\Windows\SysWOW64\chkdsk.exe"
2⤵
- Adds policy Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:380

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\Salary.exe"
3⤵
PID:4236

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:5084

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

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

MD5
b608d407fc15adea97c26936bc6f03f6

SHA1
953e7420801c76393902c0d6bb56148947e41571

SHA256
b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

SHA512
cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

Download Submit
memory/380-140-0x0000000000000000-mapping.dmp

Download
memory/380-145-0x0000000000FC0000-0x0000000001053000-memory.dmp

Filesize
588KB

Download
memory/380-143-0x0000000001230000-0x000000000157A000-memory.dmp

Filesize
3.3MB

Download
memory/380-142-0x0000000000A00000-0x0000000000A2D000-memory.dmp

Filesize
180KB

Download
memory/380-141-0x0000000000440000-0x000000000044A000-memory.dmp

Filesize
40KB

Download
memory/384-139-0x0000000002AC0000-0x0000000002BAB000-memory.dmp

Filesize
940KB

Download
memory/384-146-0x0000000008370000-0x000000000842E000-memory.dmp

Filesize
760KB

Download
memory/2256-138-0x00000000010C0000-0x00000000010D4000-memory.dmp

Filesize
80KB

Download
memory/2256-137-0x0000000001600000-0x000000000194A000-memory.dmp

Filesize
3.3MB

Download
memory/2256-135-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/2256-134-0x0000000000000000-mapping.dmp

Download
memory/4236-144-0x0000000000000000-mapping.dmp

Download
memory/5012-130-0x0000000000E00000-0x0000000000E52000-memory.dmp

Filesize
328KB

Download
memory/5012-133-0x00000000066C0000-0x0000000006C64000-memory.dmp

Filesize
5.6MB

Download
memory/5012-132-0x00000000058F0000-0x0000000005982000-memory.dmp

Filesize
584KB

Download
memory/5012-131-0x0000000005790000-0x000000000582C000-memory.dmp

Filesize
624KB

Download
memory/5084-147-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads