formbook | f0b67dba2c080cbd4fbd19b34f8b32d6d9254c9365b7d98abf085615d821f294

General

Target

Scan003_pdf.exe
Size

418KB
MD5

68d8a36449116490976ec30082dad2a1
SHA1

84a939cf6dc021dc8f66ea0333648914aaa96bdd
SHA256

f0b67dba2c080cbd4fbd19b34f8b32d6d9254c9365b7d98abf085615d821f294
SHA512

30a35dab102125ce0843b19fa1b93607588f4d6b400cdce958c5ff8c0fcfe5ff3f63e488cba3c9ce6559288ac9d9129417c85c1775237f8d1838c59a6a2d86c0

Score

10^/10

formbook dn7r rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

dn7r

C2

http://www.yourherogarden.net/dn7r/

Decoy

eventphotographerdfw.com

thehalalcoinstaking.com

philipfaziofineart.com

intercoh.com

gaiaseyephotography.com

chatbotforrealestate.com

lovelancemg.com

marlieskasberger.com

elcongoenespanol.info

lepirecredit.com

distribution-concept.com

e99game.com

exit11festival.com

twodollartoothbrushclub.com

cocktailsandlawn.com

performimprove.network

24horas-telefono-11840.com

cosmossify.com

kellenleote.com

perovskite.energy

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 4 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1000-57-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/1000-58-0x000000000041F200-mapping.dmp	formbook
behavioral1/memory/1000-63-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/820-69-0x00000000000D0000-0x00000000000FF000-memory.dmp	formbook

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1928 cmd.exe
Loads dropped DLL 1 IoCs

Processes:

Scan003_pdf.exe

pid process

1652 Scan003_pdf.exe

pid	process
1928	cmd.exe

pid	process
1652	Scan003_pdf.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

Scan003_pdf.exeScan003_pdf.exechkdsk.exe

description	pid	process	target process
PID 1652 set thread context of 1000	1652	Scan003_pdf.exe	Scan003_pdf.exe
PID 1000 set thread context of 1256	1000	Scan003_pdf.exe	Explorer.EXE
PID 1000 set thread context of 1256	1000	Scan003_pdf.exe	Explorer.EXE
PID 820 set thread context of 1256	820	chkdsk.exe	Explorer.EXE

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
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
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

Processes:

Scan003_pdf.exechkdsk.exe

pid	process
1000	Scan003_pdf.exe
1000	Scan003_pdf.exe
1000	Scan003_pdf.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe
820	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1256 Explorer.EXE
Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

Scan003_pdf.exechkdsk.exe

pid process

1000 Scan003_pdf.exe
1000 Scan003_pdf.exe
1000 Scan003_pdf.exe
1000 Scan003_pdf.exe
820 chkdsk.exe
820 chkdsk.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Scan003_pdf.exechkdsk.exe

description pid process

Token: SeDebugPrivilege 1000 Scan003_pdf.exe
Token: SeDebugPrivilege 820 chkdsk.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1256 Explorer.EXE
1256 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1256 Explorer.EXE
1256 Explorer.EXE

pid	process
1256	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1000	Scan003_pdf.exe
Token: SeDebugPrivilege	820	chkdsk.exe

pid	process
1256	Explorer.EXE
1256	Explorer.EXE

pid	process
1256	Explorer.EXE
1256	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

Scan003_pdf.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 1652 wrote to memory of 1000	1652	Scan003_pdf.exe	Scan003_pdf.exe
PID 1652 wrote to memory of 1000	1652	Scan003_pdf.exe	Scan003_pdf.exe
PID 1652 wrote to memory of 1000	1652	Scan003_pdf.exe	Scan003_pdf.exe
PID 1652 wrote to memory of 1000	1652	Scan003_pdf.exe	Scan003_pdf.exe
PID 1652 wrote to memory of 1000	1652	Scan003_pdf.exe	Scan003_pdf.exe
PID 1652 wrote to memory of 1000	1652	Scan003_pdf.exe	Scan003_pdf.exe
PID 1652 wrote to memory of 1000	1652	Scan003_pdf.exe	Scan003_pdf.exe
PID 1256 wrote to memory of 820	1256	Explorer.EXE	chkdsk.exe
PID 1256 wrote to memory of 820	1256	Explorer.EXE	chkdsk.exe
PID 1256 wrote to memory of 820	1256	Explorer.EXE	chkdsk.exe
PID 1256 wrote to memory of 820	1256	Explorer.EXE	chkdsk.exe
PID 820 wrote to memory of 1928	820	chkdsk.exe	cmd.exe
PID 820 wrote to memory of 1928	820	chkdsk.exe	cmd.exe
PID 820 wrote to memory of 1928	820	chkdsk.exe	cmd.exe
PID 820 wrote to memory of 1928	820	chkdsk.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1256

C:\Users\Admin\AppData\Local\Temp\Scan003_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Scan003_pdf.exe"
2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1652

C:\Users\Admin\AppData\Local\Temp\Scan003_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Scan003_pdf.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1000

C:\Windows\SysWOW64\chkdsk.exe
"C:\Windows\SysWOW64\chkdsk.exe"
2⤵
- Suspicious use of SetThreadContext
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:820

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\Scan003_pdf.exe"
3⤵
- Deletes itself
PID:1928

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

2

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\nsiF47D.tmp\cvjdmaof.dll
MD5
85bdf911b0ab005862c651b00de7d950

SHA1
a812c2f337c1b2e87eb848775375f72e7fae8515

SHA256
a1e0e3df91dd32825320e062b40580ddd8806af5515575628762b9a4e07c3be1

SHA512
db85b5f54a2f4faf9b047bb32a03feff77258c719960f5fd7fb29b13fab56c43e35b388f1edaab6c17efbac8187db28262b425739a4e54e8df622f9b94877ec4

Download Submit
memory/820-66-0x0000000000000000-mapping.dmp

Download
memory/820-71-0x0000000000960000-0x00000000009F4000-memory.dmp

Filesize
592KB

Download
memory/820-70-0x0000000002260000-0x0000000002563000-memory.dmp

Filesize
3.0MB

Download
memory/820-69-0x00000000000D0000-0x00000000000FF000-memory.dmp

Filesize
188KB

Download
memory/820-68-0x0000000000E50000-0x0000000000E57000-memory.dmp

Filesize
28KB

Download
memory/1000-60-0x0000000000810000-0x0000000000B13000-memory.dmp

Filesize
3.0MB

Download
memory/1000-63-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1000-64-0x0000000000390000-0x00000000003A5000-memory.dmp

Filesize
84KB

Download
memory/1000-62-0x00000000002C0000-0x00000000002D5000-memory.dmp

Filesize
84KB

Download
memory/1000-58-0x000000000041F200-mapping.dmp

Download
memory/1000-57-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1256-65-0x0000000006A10000-0x0000000006B57000-memory.dmp

Filesize
1.3MB

Download
memory/1256-61-0x00000000066F0000-0x0000000006888000-memory.dmp

Filesize
1.6MB

Download
memory/1256-72-0x0000000006890000-0x000000000698F000-memory.dmp

Filesize
1020KB

Download
memory/1652-55-0x0000000076431000-0x0000000076433000-memory.dmp

Filesize
8KB

Download
memory/1928-67-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads