formbook | 9b6b00b331ea48d5477fbd0ec6e168407dcec59c758eb797c9672d2f74dba12a

General

Target

dllhost.exe
Size

448KB
MD5

c78d5e89ebecb4d88d3ab36bc47fd7ba
SHA1

476733e0eb88a9dce2a65200c23ddd0d5f2b3496
SHA256

9b6b00b331ea48d5477fbd0ec6e168407dcec59c758eb797c9672d2f74dba12a
SHA512

a4de582e5f599ad11c60dbdb7e7ded18c004f956ec84eb379f30ebd1e83eb3fe938fab821038dcf6c1dff839b329ff85ab556fd75f54e70e332ff25415ddfddb

Score

10^/10

formbook kzk9 rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

kzk9

C2

http://www.yourmajordomo.com/kzk9/

Decoy

tianconghuo.club

1996-page.com

ourtownmax.net

conservativetreehose.com

synth.repair

donnachicacreperia.com

tentfull.com

weapp.download

surfersink.com

gattlebusinessservices.com

sebastian249.com

anhphuc.company

betternatureproducts.net

defroplate.com

seattlesquidsquad.com

polarjob.com

lendingadvantage.com

angelsondope.com

goportjitney.com

tiendagrupojagr.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/1044-61-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/1044-62-0x000000000041EB80-mapping.dmp	formbook
behavioral1/memory/644-69-0x0000000000080000-0x00000000000AE000-memory.dmp	formbook

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1556 cmd.exe

pid	process
1556	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

dllhost.exedllhost.exeNAPSTAT.EXE

description	pid	process	target process
PID 1072 set thread context of 1044	1072	dllhost.exe	dllhost.exe
PID 1044 set thread context of 1264	1044	dllhost.exe	Explorer.EXE
PID 644 set thread context of 1264	644	NAPSTAT.EXE	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 25 IoCs

Processes:

dllhost.exedllhost.exeNAPSTAT.EXE

pid	process
1072	dllhost.exe
1072	dllhost.exe
1072	dllhost.exe
1072	dllhost.exe
1072	dllhost.exe
1072	dllhost.exe
1044	dllhost.exe
1044	dllhost.exe
644	NAPSTAT.EXE
644	NAPSTAT.EXE
644	NAPSTAT.EXE
644	NAPSTAT.EXE
644	NAPSTAT.EXE
644	NAPSTAT.EXE
644	NAPSTAT.EXE
644	NAPSTAT.EXE
644	NAPSTAT.EXE
644	NAPSTAT.EXE
644	NAPSTAT.EXE
644	NAPSTAT.EXE
644	NAPSTAT.EXE
644	NAPSTAT.EXE
644	NAPSTAT.EXE
644	NAPSTAT.EXE
644	NAPSTAT.EXE

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

dllhost.exeNAPSTAT.EXE

pid process

1044 dllhost.exe
1044 dllhost.exe
1044 dllhost.exe
644 NAPSTAT.EXE
644 NAPSTAT.EXE
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

dllhost.exedllhost.exeNAPSTAT.EXE

description pid process

Token: SeDebugPrivilege 1072 dllhost.exe
Token: SeDebugPrivilege 1044 dllhost.exe
Token: SeDebugPrivilege 644 NAPSTAT.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1264 Explorer.EXE
1264 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1264 Explorer.EXE
1264 Explorer.EXE

pid	process
1044	dllhost.exe
1044	dllhost.exe
1044	dllhost.exe
644	NAPSTAT.EXE
644	NAPSTAT.EXE

description	pid	process
Token: SeDebugPrivilege	1072	dllhost.exe
Token: SeDebugPrivilege	1044	dllhost.exe
Token: SeDebugPrivilege	644	NAPSTAT.EXE

pid	process
1264	Explorer.EXE
1264	Explorer.EXE

pid	process
1264	Explorer.EXE
1264	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

dllhost.exeExplorer.EXENAPSTAT.EXE

description	pid	process	target process
PID 1072 wrote to memory of 1044	1072	dllhost.exe	dllhost.exe
PID 1072 wrote to memory of 1044	1072	dllhost.exe	dllhost.exe
PID 1072 wrote to memory of 1044	1072	dllhost.exe	dllhost.exe
PID 1072 wrote to memory of 1044	1072	dllhost.exe	dllhost.exe
PID 1072 wrote to memory of 1044	1072	dllhost.exe	dllhost.exe
PID 1072 wrote to memory of 1044	1072	dllhost.exe	dllhost.exe
PID 1072 wrote to memory of 1044	1072	dllhost.exe	dllhost.exe
PID 1264 wrote to memory of 644	1264	Explorer.EXE	NAPSTAT.EXE
PID 1264 wrote to memory of 644	1264	Explorer.EXE	NAPSTAT.EXE
PID 1264 wrote to memory of 644	1264	Explorer.EXE	NAPSTAT.EXE
PID 1264 wrote to memory of 644	1264	Explorer.EXE	NAPSTAT.EXE
PID 644 wrote to memory of 1556	644	NAPSTAT.EXE	cmd.exe
PID 644 wrote to memory of 1556	644	NAPSTAT.EXE	cmd.exe
PID 644 wrote to memory of 1556	644	NAPSTAT.EXE	cmd.exe
PID 644 wrote to memory of 1556	644	NAPSTAT.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:1264

C:\Users\Admin\AppData\Local\Temp\dllhost.exe
"C:\Users\Admin\AppData\Local\Temp\dllhost.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1072

C:\Users\Admin\AppData\Local\Temp\dllhost.exe
"C:\Users\Admin\AppData\Local\Temp\dllhost.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1044

C:\Windows\SysWOW64\NAPSTAT.EXE
"C:\Windows\SysWOW64\NAPSTAT.EXE"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:644

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\dllhost.exe"
3⤵
- Deletes itself
PID:1556

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/644-67-0x0000000000000000-mapping.dmp

Download
memory/644-72-0x0000000000860000-0x00000000008F3000-memory.dmp

Filesize
588KB

Download
memory/644-71-0x0000000001FF0000-0x00000000022F3000-memory.dmp

Filesize
3.0MB

Download
memory/644-69-0x0000000000080000-0x00000000000AE000-memory.dmp

Filesize
184KB

Download
memory/644-68-0x00000000000D0000-0x0000000000116000-memory.dmp

Filesize
280KB

Download
memory/1044-59-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1044-61-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1044-62-0x000000000041EB80-mapping.dmp

Download
memory/1044-65-0x00000000003D0000-0x00000000003E4000-memory.dmp

Filesize
80KB

Download
memory/1044-64-0x00000000009C0000-0x0000000000CC3000-memory.dmp

Filesize
3.0MB

Download
memory/1044-60-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1072-54-0x00000000011B0000-0x00000000011B1000-memory.dmp

Filesize
4KB

Download
memory/1072-58-0x0000000000B00000-0x0000000000B4F000-memory.dmp

Filesize
316KB

Download
memory/1072-57-0x00000000003D0000-0x00000000003D7000-memory.dmp

Filesize
28KB

Download
memory/1072-56-0x0000000007270000-0x0000000007271000-memory.dmp

Filesize
4KB

Download
memory/1264-66-0x0000000006750000-0x0000000006806000-memory.dmp

Filesize
728KB

Download
memory/1264-73-0x00000000061E0000-0x00000000062D5000-memory.dmp

Filesize
980KB

Download
memory/1556-70-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads