formbook | c02f34dcea29e7a3b6901cd3e745fbae79e2ab45db6ba28569a5d3994aedde8c

General

Target

Invo458_Signed_.exe
Size

1.1MB
MD5

386a65d6fb3e5a13d690c20474e6c342
SHA1

3084a0d410b1b1ee0bc5a5308a8f65124b574e56
SHA256

4a5f33710715ce37a266d1848db4599be8ede6fe3f1070aa49b3bcca352f3f46
SHA512

e571e72487787b174c862a26ce03a3736b9f56361e091684f991821924eee2a3941664164f2714ba078cc78e178d69491610d076147f940415ca6027b8f6cea9

Score

10^/10

formbook n8x persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

n8x

Decoy

xn--bwwn53bbqc.net

theschooloftheinvisual.net

highseqanalysis.info

fengkuanghanyu.com

myexecutivejourney.com

rfwtje.info

amilcarspencerdemelo.com

cryptodreaming.info

astoundingvogueboutique.com

ytjulin.com

croxventure.com

panstarv.com

fatimahinayet.com

mattyboysparrow.com

dtfftfut.com

y0uhdporno.com

91av5.com

coralchau.com

f98fhr567a.info

aengion.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 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1660-55-0x00000000040E0000-0x0000000004220000-memory.dmp	formbook
behavioral1/memory/1660-59-0x00000000040E0000-0x0000000004220000-memory.dmp	formbook
behavioral1/memory/1756-65-0x0000000000130000-0x000000000015D000-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 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Invo458_Signed_.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Xwxl = "C:\\Users\\Admin\\AppData\\Local\\Xwxl.url"	Invo458_Signed_.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

Invo458_Signed_.exerundll32.exe

description	pid	process	target process
PID 1660 set thread context of 1364	1660	Invo458_Signed_.exe	Explorer.EXE
PID 1660 set thread context of 1364	1660	Invo458_Signed_.exe	Explorer.EXE
PID 1756 set thread context of 1364	1756	rundll32.exe	Explorer.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-1-5-21-790309383-526510583-3802439154-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	rundll32.exe

Script User-Agent 1 IoCs
Uses user-agent string associated with script host/environment.

Processes:

description flow ioc

HTTP User-Agent header 5 Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

description	flow	ioc
HTTP User-Agent header	5	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 19 IoCs

Processes:

Invo458_Signed_.exerundll32.exe

pid	process
1660	Invo458_Signed_.exe
1660	Invo458_Signed_.exe
1660	Invo458_Signed_.exe
1756	rundll32.exe
1756	rundll32.exe
1756	rundll32.exe
1756	rundll32.exe
1756	rundll32.exe
1756	rundll32.exe
1756	rundll32.exe
1756	rundll32.exe
1756	rundll32.exe
1756	rundll32.exe
1756	rundll32.exe
1756	rundll32.exe
1756	rundll32.exe
1756	rundll32.exe
1756	rundll32.exe
1756	rundll32.exe

Suspicious behavior: MapViewOfSection 8 IoCs

Processes:

Invo458_Signed_.exerundll32.exe

pid	process
1660	Invo458_Signed_.exe
1660	Invo458_Signed_.exe
1660	Invo458_Signed_.exe
1660	Invo458_Signed_.exe
1756	rundll32.exe
1756	rundll32.exe
1756	rundll32.exe
1756	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Invo458_Signed_.exerundll32.exe

description pid process

Token: SeDebugPrivilege 1660 Invo458_Signed_.exe
Token: SeDebugPrivilege 1756 rundll32.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1364 Explorer.EXE
1364 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1364 Explorer.EXE
1364 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1660	Invo458_Signed_.exe
Token: SeDebugPrivilege	1756	rundll32.exe

pid	process
1364	Explorer.EXE
1364	Explorer.EXE

pid	process
1364	Explorer.EXE
1364	Explorer.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

Explorer.EXErundll32.exe

description	pid	process	target process
PID 1364 wrote to memory of 1756	1364	Explorer.EXE	rundll32.exe
PID 1364 wrote to memory of 1756	1364	Explorer.EXE	rundll32.exe
PID 1364 wrote to memory of 1756	1364	Explorer.EXE	rundll32.exe
PID 1364 wrote to memory of 1756	1364	Explorer.EXE	rundll32.exe
PID 1364 wrote to memory of 1756	1364	Explorer.EXE	rundll32.exe
PID 1364 wrote to memory of 1756	1364	Explorer.EXE	rundll32.exe
PID 1364 wrote to memory of 1756	1364	Explorer.EXE	rundll32.exe
PID 1756 wrote to memory of 1716	1756	rundll32.exe	Firefox.exe
PID 1756 wrote to memory of 1716	1756	rundll32.exe	Firefox.exe
PID 1756 wrote to memory of 1716	1756	rundll32.exe	Firefox.exe
PID 1756 wrote to memory of 1716	1756	rundll32.exe	Firefox.exe
PID 1756 wrote to memory of 1716	1756	rundll32.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1364

C:\Users\Admin\AppData\Local\Temp\Invo458_Signed_.exe
"C:\Users\Admin\AppData\Local\Temp\Invo458_Signed_.exe"
2⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1660

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\SysWOW64\rundll32.exe"
2⤵
- Suspicious use of SetThreadContext
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1756

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1716

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\Roaming\83M6P6QB\83Mlogim.jpeg
Filesize
67KB

MD5
535448f4af7083f08107c130e9e78678

SHA1
1bbcaae5f263942fba0eb4d32e0b0a73825ca628

SHA256
fed47da3687f5ad365329e9cf8e4c49aa34eb9d1881a33754e92c84fca838a9f

SHA512
89bbd4a62fd082cf9dac9ed8b2925c93c85dbf8969e0d624e8818aad1879ca86cbea98fcc8780ea603c29140f5717e9acecc6dd44fa585d351239ce47f03ba66

Download Submit
C:\Users\Admin\AppData\Roaming\83M6P6QB\83Mlogrf.ini
Filesize
40B

MD5
2f245469795b865bdd1b956c23d7893d

SHA1
6ad80b974d3808f5a20ea1e766c7d2f88b9e5895

SHA256
1662d01a2d47b875a34fc7a8cd92e78cb2ba7f34023c7fd2639cbb10b8d94361

SHA512
909f189846a5d2db208a5eb2e7cb3042c0f164caf437e2b1b6de608c0a70e4f3510b81b85753dbeec1e211e6a83e6ea8c96aff896e9b6e8ed42014473a54dc4f

Download Submit
C:\Users\Admin\AppData\Roaming\83M6P6QB\83Mlogri.ini
Filesize
40B

MD5
d63a82e5d81e02e399090af26db0b9cb

SHA1
91d0014c8f54743bba141fd60c9d963f869d76c9

SHA256
eaece2eba6310253249603033c744dd5914089b0bb26bde6685ec9813611baae

SHA512
38afb05016d8f3c69d246321573997aaac8a51c34e61749a02bf5e8b2b56b94d9544d65801511044e1495906a86dc2100f2e20ff4fcbed09e01904cc780fdbad

Download Submit
C:\Users\Admin\AppData\Roaming\83M6P6QB\83Mlogrv.ini
Filesize
40B

MD5
ba3b6bc807d4f76794c4b81b09bb9ba5

SHA1
24cb89501f0212ff3095ecc0aba97dd563718fb1

SHA256
6eebf968962745b2e9de2ca969af7c424916d4e3fe3cc0bb9b3d414abfce9507

SHA512
ecd07e601fc9e3cfc39addd7bd6f3d7f7ff3253afb40bf536e9eaac5a4c243e5ec40fbfd7b216cb0ea29f2517419601e335e33ba19dea4a46f65e38694d465bf

Download Submit
memory/1364-68-0x0000000006CF0000-0x0000000006E3A000-memory.dmp

Filesize
1.3MB

Download
memory/1364-58-0x0000000004CA0000-0x0000000004D87000-memory.dmp

Filesize
924KB

Download
memory/1364-61-0x0000000006B60000-0x0000000006CE5000-memory.dmp

Filesize
1.5MB

Download
memory/1660-60-0x0000000003F40000-0x0000000003F54000-memory.dmp

Filesize
80KB

Download
memory/1660-59-0x00000000040E0000-0x0000000004220000-memory.dmp

Filesize
1.2MB

Download
memory/1660-55-0x00000000040E0000-0x0000000004220000-memory.dmp

Filesize
1.2MB

Download
memory/1660-56-0x00000000044F0000-0x00000000047F3000-memory.dmp

Filesize
3.0MB

Download
memory/1660-57-0x00000000036D0000-0x00000000036E4000-memory.dmp

Filesize
80KB

Download
memory/1660-54-0x0000000075F21000-0x0000000075F23000-memory.dmp

Filesize
8KB

Download
memory/1756-62-0x0000000000000000-mapping.dmp

Download
memory/1756-67-0x00000000009E0000-0x0000000000A73000-memory.dmp

Filesize
588KB

Download
memory/1756-66-0x0000000002060000-0x0000000002363000-memory.dmp

Filesize
3.0MB

Download
memory/1756-65-0x0000000000130000-0x000000000015D000-memory.dmp

Filesize
180KB

Download
memory/1756-64-0x0000000000280000-0x000000000028E000-memory.dmp

Filesize
56KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads