formbook | a7492a3e2caa18c09290209462772d7356966ed9fe91f86830284d950604b300

General

Target

48d4eafd1412fe11e58cb6778be9a6cc.exe
Size

285KB
MD5

48d4eafd1412fe11e58cb6778be9a6cc
SHA1

4df1a667d1c7de90a5492146b92ffbb667d689a2
SHA256

a7492a3e2caa18c09290209462772d7356966ed9fe91f86830284d950604b300
SHA512

5a34f30f6c9d9d92938f9a357454095ee8421102de1fcce5abb827a2468f7f4050178810d0df16a7174832747453f4218a41e70388195534a93f860cc97bc2e4

Score

10^/10

formbook xloader zgtb loader persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

xloader

Version

2.6

Campaign

zgtb

Decoy

gabriellep.com

honghe4.xyz

anisaofrendas.com

happy-tile.com

thesulkies.com

international-ipo.com

tazeco.info

hhhzzz.xyz

vrmonster.xyz

theearthresidencia.com

sportape.xyz

elshadaibaterias.com

koredeiihibi.com

taxtaa.com

globalcityb.com

fxivcama.com

dagsmith.com

elmar-bhp.com

peakice.net

jhcdjewelry.com

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

Xloader Payload 5 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1248-59-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral1/memory/1248-60-0x000000000041F1F0-mapping.dmp	xloader
behavioral1/memory/1248-62-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral1/memory/1248-70-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral1/memory/1736-74-0x00000000000E0000-0x000000000010B000-memory.dmp	xloader

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

rundll32.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\-ZHTQFGP = "C:\\Program Files (x86)\\Htdr\\igfxyjop.exe"	rundll32.exe

Blocklisted process makes network request 1 IoCs

Processes:

rundll32.exe

flow pid process

28 1736 rundll32.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

flow	pid	process
28	1736	rundll32.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

48d4eafd1412fe11e58cb6778be9a6cc.execvtres.exerundll32.exe

description	pid	process	target process
PID 1968 set thread context of 1248	1968	48d4eafd1412fe11e58cb6778be9a6cc.exe	cvtres.exe
PID 1248 set thread context of 1188	1248	cvtres.exe	Explorer.EXE
PID 1248 set thread context of 1188	1248	cvtres.exe	Explorer.EXE
PID 1736 set thread context of 1188	1736	rundll32.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File opened for modification C:\Program Files (x86)\Htdr\igfxyjop.exe rundll32.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Htdr\igfxyjop.exe	rundll32.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

rundll32.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-1083475884-596052423-1669053738-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	rundll32.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

Processes:

cvtres.exerundll32.exe

pid	process
1248	cvtres.exe
1248	cvtres.exe
1248	cvtres.exe
1736	rundll32.exe
1736	rundll32.exe
1736	rundll32.exe
1736	rundll32.exe
1736	rundll32.exe
1736	rundll32.exe
1736	rundll32.exe
1736	rundll32.exe
1736	rundll32.exe
1736	rundll32.exe
1736	rundll32.exe
1736	rundll32.exe
1736	rundll32.exe
1736	rundll32.exe
1736	rundll32.exe
1736	rundll32.exe
1736	rundll32.exe
1736	rundll32.exe

Suspicious behavior: MapViewOfSection 8 IoCs

Processes:

cvtres.exerundll32.exe

pid process

1248 cvtres.exe
1248 cvtres.exe
1248 cvtres.exe
1248 cvtres.exe
1736 rundll32.exe
1736 rundll32.exe
1736 rundll32.exe
1736 rundll32.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

cvtres.exerundll32.exe

description pid process

Token: SeDebugPrivilege 1248 cvtres.exe
Token: SeDebugPrivilege 1736 rundll32.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1188 Explorer.EXE
1188 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1188 Explorer.EXE
1188 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1248	cvtres.exe
Token: SeDebugPrivilege	1736	rundll32.exe

pid	process
1188	Explorer.EXE
1188	Explorer.EXE

pid	process
1188	Explorer.EXE
1188	Explorer.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

48d4eafd1412fe11e58cb6778be9a6cc.exeExplorer.EXErundll32.exe

description	pid	process	target process
PID 1968 wrote to memory of 1248	1968	48d4eafd1412fe11e58cb6778be9a6cc.exe	cvtres.exe
PID 1968 wrote to memory of 1248	1968	48d4eafd1412fe11e58cb6778be9a6cc.exe	cvtres.exe
PID 1968 wrote to memory of 1248	1968	48d4eafd1412fe11e58cb6778be9a6cc.exe	cvtres.exe
PID 1968 wrote to memory of 1248	1968	48d4eafd1412fe11e58cb6778be9a6cc.exe	cvtres.exe
PID 1968 wrote to memory of 1248	1968	48d4eafd1412fe11e58cb6778be9a6cc.exe	cvtres.exe
PID 1968 wrote to memory of 1248	1968	48d4eafd1412fe11e58cb6778be9a6cc.exe	cvtres.exe
PID 1968 wrote to memory of 1248	1968	48d4eafd1412fe11e58cb6778be9a6cc.exe	cvtres.exe
PID 1188 wrote to memory of 1736	1188	Explorer.EXE	rundll32.exe
PID 1188 wrote to memory of 1736	1188	Explorer.EXE	rundll32.exe
PID 1188 wrote to memory of 1736	1188	Explorer.EXE	rundll32.exe
PID 1188 wrote to memory of 1736	1188	Explorer.EXE	rundll32.exe
PID 1188 wrote to memory of 1736	1188	Explorer.EXE	rundll32.exe
PID 1188 wrote to memory of 1736	1188	Explorer.EXE	rundll32.exe
PID 1188 wrote to memory of 1736	1188	Explorer.EXE	rundll32.exe
PID 1736 wrote to memory of 936	1736	rundll32.exe	cmd.exe
PID 1736 wrote to memory of 936	1736	rundll32.exe	cmd.exe
PID 1736 wrote to memory of 936	1736	rundll32.exe	cmd.exe
PID 1736 wrote to memory of 936	1736	rundll32.exe	cmd.exe
PID 1736 wrote to memory of 1808	1736	rundll32.exe	Firefox.exe
PID 1736 wrote to memory of 1808	1736	rundll32.exe	Firefox.exe
PID 1736 wrote to memory of 1808	1736	rundll32.exe	Firefox.exe
PID 1736 wrote to memory of 1808	1736	rundll32.exe	Firefox.exe
PID 1736 wrote to memory of 1808	1736	rundll32.exe	Firefox.exe

System policy modification 1 TTPs 1 IoCs
evasion

Modify Registry
T1112

Processes:

rundll32.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer rundll32.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	rundll32.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1188

C:\Users\Admin\AppData\Local\Temp\48d4eafd1412fe11e58cb6778be9a6cc.exe
"C:\Users\Admin\AppData\Local\Temp\48d4eafd1412fe11e58cb6778be9a6cc.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1968

C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1248

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\SysWOW64\rundll32.exe"
2⤵
- Adds policy Run key to start application
- Blocklisted process makes network request
- 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
- System policy modification
PID:1736

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
3⤵
PID:936

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1808

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

3

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

memory/936-72-0x0000000000000000-mapping.dmp

Download
memory/1188-65-0x0000000004880000-0x0000000004970000-memory.dmp

Filesize
960KB

Download
memory/1188-78-0x00000000065A0000-0x0000000006683000-memory.dmp

Filesize
908KB

Download
memory/1188-77-0x00000000065A0000-0x0000000006683000-memory.dmp

Filesize
908KB

Download
memory/1188-68-0x0000000004BF0000-0x0000000004D54000-memory.dmp

Filesize
1.4MB

Download
memory/1248-60-0x000000000041F1F0-mapping.dmp

Download
memory/1248-62-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1248-63-0x0000000000A00000-0x0000000000D03000-memory.dmp

Filesize
3.0MB

Download
memory/1248-64-0x00000000001A0000-0x00000000001B1000-memory.dmp

Filesize
68KB

Download
memory/1248-56-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1248-67-0x00000000001F0000-0x0000000000201000-memory.dmp

Filesize
68KB

Download
memory/1248-59-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1248-57-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1248-70-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1736-71-0x0000000075EF1000-0x0000000075EF3000-memory.dmp

Filesize
8KB

Download
memory/1736-69-0x0000000000000000-mapping.dmp

Download
memory/1736-73-0x0000000000970000-0x000000000097E000-memory.dmp

Filesize
56KB

Download
memory/1736-74-0x00000000000E0000-0x000000000010B000-memory.dmp

Filesize
172KB

Download
memory/1736-75-0x00000000020C0000-0x00000000023C3000-memory.dmp

Filesize
3.0MB

Download
memory/1736-76-0x0000000001D80000-0x0000000001E10000-memory.dmp

Filesize
576KB

Download
memory/1968-54-0x0000000000CA0000-0x0000000000CEC000-memory.dmp

Filesize
304KB

Download
memory/1968-55-0x0000000000470000-0x00000000004A4000-memory.dmp

Filesize
208KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads