formbook | a703fd2372483e4bbb75bc96dd4f0f95c489eede136451016106eb6c62636658

General

Target

BANK_LET.exe
Size

339KB
MD5

86bb43248e3ad56e9a839cc6c7b03282
SHA1

30afc80c7a9d14fb54cd799b2b2d552c9f2e138d
SHA256

286add28a79440668077a7d762ee81ee169f1c08daa27bc680dbf8c8832d2785
SHA512

17716ec8e1dbee062a3534eab62e0ba4b793ec94d6f64043493dfddb8424bd0d6a7d792e26d628f86d6acbf18ba671817d30ba243ebbac5a7b4255f8e19a6cc1

Score

10^/10

formbook 23v evasion persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

3.9

Campaign

23v

Decoy

1l4m-5qeh0cgx9a.com

portsel.com

vypnxg.men

renrenbaoshangcheng.com

hulebang.com

heatburnio.com

amazingthunderworks.com

quantumreapers.com

8801i.info

moonlightmanager.com

bqypm.info

backlinkbarato.com

jiudianhuixun.com

markerbio.net

empety.com

eternalkollection.com

teknoshift.com

petitenobel.net

zlmqv.info

emotionalcontrols.com

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Modifies Windows Defender Real-time Protection settings 3 TTPs
evasion trojan

Modify Registry
T1112

Modify Existing Service
T1031

Disabling Security Tools
T1089
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata

Formbook Payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1704-62-0x0000000000400000-0x000000000042A000-memory.dmp	formbook
behavioral1/memory/1704-63-0x000000000041B640-mapping.dmp	formbook
behavioral1/memory/1704-65-0x0000000000400000-0x000000000042A000-memory.dmp	formbook
behavioral1/memory/1656-72-0x0000000000080000-0x00000000000AA000-memory.dmp	formbook

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\MBDXKZIXX = "C:\\Program Files (x86)\\Wpbctq0\\mfcl4wtitix.exe"	svchost.exe

Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

BANK_LET.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	BANK_LET.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	BANK_LET.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1824 cmd.exe

pid	process
1824	cmd.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

BANK_LET.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features	BANK_LET.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	BANK_LET.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

BANK_LET.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	BANK_LET.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	BANK_LET.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

BANK_LET.exeBANK_LET.exesvchost.exe

description	pid	process	target process
PID 976 set thread context of 1704	976	BANK_LET.exe	BANK_LET.exe
PID 1704 set thread context of 1232	1704	BANK_LET.exe	Explorer.EXE
PID 1656 set thread context of 1232	1656	svchost.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

svchost.exe

description ioc process

File opened for modification C:\Program Files (x86)\Wpbctq0\mfcl4wtitix.exe svchost.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Wpbctq0\mfcl4wtitix.exe	svchost.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

svchost.exe

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

Suspicious behavior: EnumeratesProcesses 19 IoCs

Processes:

powershell.exeBANK_LET.exesvchost.exe

pid	process
832	powershell.exe
1704	BANK_LET.exe
1704	BANK_LET.exe
1656	svchost.exe
1656	svchost.exe
1656	svchost.exe
1656	svchost.exe
1656	svchost.exe
1656	svchost.exe
1656	svchost.exe
1656	svchost.exe
1656	svchost.exe
1656	svchost.exe
1656	svchost.exe
1656	svchost.exe
1656	svchost.exe
1656	svchost.exe
1656	svchost.exe
1656	svchost.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

BANK_LET.exesvchost.exe

pid process

1704 BANK_LET.exe
1704 BANK_LET.exe
1704 BANK_LET.exe
1656 svchost.exe
1656 svchost.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.exeBANK_LET.exesvchost.exe

description pid process

Token: SeDebugPrivilege 832 powershell.exe
Token: SeDebugPrivilege 1704 BANK_LET.exe
Token: SeDebugPrivilege 1656 svchost.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1232 Explorer.EXE
1232 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1232 Explorer.EXE
1232 Explorer.EXE

pid	process
1704	BANK_LET.exe
1704	BANK_LET.exe
1704	BANK_LET.exe
1656	svchost.exe
1656	svchost.exe

description	pid	process
Token: SeDebugPrivilege	832	powershell.exe
Token: SeDebugPrivilege	1704	BANK_LET.exe
Token: SeDebugPrivilege	1656	svchost.exe

pid	process
1232	Explorer.EXE
1232	Explorer.EXE

pid	process
1232	Explorer.EXE
1232	Explorer.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

BANK_LET.exeExplorer.EXEsvchost.exe

description	pid	process	target process
PID 976 wrote to memory of 832	976	BANK_LET.exe	powershell.exe
PID 976 wrote to memory of 832	976	BANK_LET.exe	powershell.exe
PID 976 wrote to memory of 832	976	BANK_LET.exe	powershell.exe
PID 976 wrote to memory of 832	976	BANK_LET.exe	powershell.exe
PID 976 wrote to memory of 1704	976	BANK_LET.exe	BANK_LET.exe
PID 976 wrote to memory of 1704	976	BANK_LET.exe	BANK_LET.exe
PID 976 wrote to memory of 1704	976	BANK_LET.exe	BANK_LET.exe
PID 976 wrote to memory of 1704	976	BANK_LET.exe	BANK_LET.exe
PID 976 wrote to memory of 1704	976	BANK_LET.exe	BANK_LET.exe
PID 976 wrote to memory of 1704	976	BANK_LET.exe	BANK_LET.exe
PID 976 wrote to memory of 1704	976	BANK_LET.exe	BANK_LET.exe
PID 1232 wrote to memory of 1656	1232	Explorer.EXE	svchost.exe
PID 1232 wrote to memory of 1656	1232	Explorer.EXE	svchost.exe
PID 1232 wrote to memory of 1656	1232	Explorer.EXE	svchost.exe
PID 1232 wrote to memory of 1656	1232	Explorer.EXE	svchost.exe
PID 1656 wrote to memory of 1824	1656	svchost.exe	cmd.exe
PID 1656 wrote to memory of 1824	1656	svchost.exe	cmd.exe
PID 1656 wrote to memory of 1824	1656	svchost.exe	cmd.exe
PID 1656 wrote to memory of 1824	1656	svchost.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1232

C:\Users\Admin\AppData\Local\Temp\BANK_LET.exe
"C:\Users\Admin\AppData\Local\Temp\BANK_LET.exe"
2⤵
- Checks BIOS information in registry
- Windows security modification
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:976

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell" Get-MpPreference -verbose
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:832

C:\Users\Admin\AppData\Local\Temp\BANK_LET.exe
"{path}"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1704

C:\Windows\SysWOW64\svchost.exe
"C:\Windows\SysWOW64\svchost.exe"
2⤵
- Adds policy 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:1656

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\BANK_LET.exe"
3⤵
- Deletes itself
PID:1824

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Disabling Security Tools

Modify Registry

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\8LNO-92F\8LNlogim.jpeg

Filesize
62KB

MD5
988c4e680ed029ec037d6db2fd0700a2

SHA1
84a5a1464b8c5d3d41d88bcdb2e146c20d75d1c5

SHA256
af54acd9171246137c56b6afe5f47936436025805264b629c841aac807a3687c

SHA512
58bc856cf50f1e34c567874037ca0821ed95bbd55bd909dc5bac0005c57c02f4d82247552a89e68458caba3df2b0d7044587cd175002180a4d56f30c69465b91

Download Submit
C:\Users\Admin\AppData\Roaming\8LNO-92F\8LNlogri.ini

Filesize
40B

MD5
d63a82e5d81e02e399090af26db0b9cb

SHA1
91d0014c8f54743bba141fd60c9d963f869d76c9

SHA256
eaece2eba6310253249603033c744dd5914089b0bb26bde6685ec9813611baae

SHA512
38afb05016d8f3c69d246321573997aaac8a51c34e61749a02bf5e8b2b56b94d9544d65801511044e1495906a86dc2100f2e20ff4fcbed09e01904cc780fdbad

Download Submit
C:\Users\Admin\AppData\Roaming\8LNO-92F\8LNlogrv.ini

Filesize
40B

MD5
ba3b6bc807d4f76794c4b81b09bb9ba5

SHA1
24cb89501f0212ff3095ecc0aba97dd563718fb1

SHA256
6eebf968962745b2e9de2ca969af7c424916d4e3fe3cc0bb9b3d414abfce9507

SHA512
ecd07e601fc9e3cfc39addd7bd6f3d7f7ff3253afb40bf536e9eaac5a4c243e5ec40fbfd7b216cb0ea29f2517419601e335e33ba19dea4a46f65e38694d465bf

Download Submit
memory/832-58-0x0000000074E00000-0x00000000753AB000-memory.dmp

Filesize
5.7MB

Download
memory/832-56-0x0000000000000000-mapping.dmp

Download
memory/976-54-0x00000000759F1000-0x00000000759F3000-memory.dmp

Filesize
8KB

Download
memory/976-55-0x0000000074E00000-0x00000000753AB000-memory.dmp

Filesize
5.7MB

Download
memory/1232-75-0x0000000004340000-0x00000000043F1000-memory.dmp

Filesize
708KB

Download
memory/1232-68-0x0000000005EB0000-0x0000000006016000-memory.dmp

Filesize
1.4MB

Download
memory/1656-71-0x0000000000490000-0x0000000000498000-memory.dmp

Filesize
32KB

Download
memory/1656-74-0x00000000004F0000-0x0000000000583000-memory.dmp

Filesize
588KB

Download
memory/1656-73-0x0000000000980000-0x0000000000C83000-memory.dmp

Filesize
3.0MB

Download
memory/1656-69-0x0000000000000000-mapping.dmp

Download
memory/1656-72-0x0000000000080000-0x00000000000AA000-memory.dmp

Filesize
168KB

Download
memory/1704-60-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/1704-67-0x00000000001C0000-0x00000000001D4000-memory.dmp

Filesize
80KB

Download
memory/1704-66-0x0000000000820000-0x0000000000B23000-memory.dmp

Filesize
3.0MB

Download
memory/1704-65-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/1704-63-0x000000000041B640-mapping.dmp

Download
memory/1704-62-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/1704-59-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/1824-70-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads