formbook | 37f6df44b9dd38408fe5682c6d660eceb04a2915b3420576afce05bf3076bc01

General

Target

dllhost.exe
Size

1.4MB
MD5

bb367436118b3298affddea50440ac12
SHA1

b2b8d261784991e3c14c6577447362cb6d72634c
SHA256

37f6df44b9dd38408fe5682c6d660eceb04a2915b3420576afce05bf3076bc01
SHA512

f3549647a3e17bf9ca84e67e40311c3906e9b822f25567a434f8ae7ef737d0a10057ff5812fb293f4d2375b1da15b14458b33c3bcff92eb3599512757c1d638d

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/268-67-0x000000000041EB80-mapping.dmp	formbook
behavioral1/memory/268-66-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/1048-75-0x00000000000F0000-0x000000000011E000-memory.dmp	formbook

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1500 cmd.exe

pid	process
1500	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

dllhost.exedllhost.exerundll32.exe

description	pid	process	target process
PID 1064 set thread context of 268	1064	dllhost.exe	dllhost.exe
PID 268 set thread context of 1244	268	dllhost.exe	Explorer.EXE
PID 1048 set thread context of 1244	1048	rundll32.exe	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 21 IoCs

Processes:

dllhost.exedllhost.exerundll32.exe

pid	process
1064	dllhost.exe
268	dllhost.exe
268	dllhost.exe
1048	rundll32.exe
1048	rundll32.exe
1048	rundll32.exe
1048	rundll32.exe
1048	rundll32.exe
1048	rundll32.exe
1048	rundll32.exe
1048	rundll32.exe
1048	rundll32.exe
1048	rundll32.exe
1048	rundll32.exe
1048	rundll32.exe
1048	rundll32.exe
1048	rundll32.exe
1048	rundll32.exe
1048	rundll32.exe
1048	rundll32.exe
1048	rundll32.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

dllhost.exerundll32.exe

pid process

268 dllhost.exe
268 dllhost.exe
268 dllhost.exe
1048 rundll32.exe
1048 rundll32.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

dllhost.exedllhost.exerundll32.exe

description pid process

Token: SeDebugPrivilege 1064 dllhost.exe
Token: SeDebugPrivilege 268 dllhost.exe
Token: SeDebugPrivilege 1048 rundll32.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1244 Explorer.EXE
1244 Explorer.EXE
1244 Explorer.EXE
1244 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1244 Explorer.EXE
1244 Explorer.EXE
1244 Explorer.EXE
1244 Explorer.EXE

pid	process
268	dllhost.exe
268	dllhost.exe
268	dllhost.exe
1048	rundll32.exe
1048	rundll32.exe

description	pid	process
Token: SeDebugPrivilege	1064	dllhost.exe
Token: SeDebugPrivilege	268	dllhost.exe
Token: SeDebugPrivilege	1048	rundll32.exe

pid	process
1244	Explorer.EXE
1244	Explorer.EXE
1244	Explorer.EXE
1244	Explorer.EXE

pid	process
1244	Explorer.EXE
1244	Explorer.EXE
1244	Explorer.EXE
1244	Explorer.EXE

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

dllhost.exeExplorer.EXErundll32.exe

description	pid	process	target process
PID 1064 wrote to memory of 268	1064	dllhost.exe	dllhost.exe
PID 1064 wrote to memory of 268	1064	dllhost.exe	dllhost.exe
PID 1064 wrote to memory of 268	1064	dllhost.exe	dllhost.exe
PID 1064 wrote to memory of 268	1064	dllhost.exe	dllhost.exe
PID 1064 wrote to memory of 268	1064	dllhost.exe	dllhost.exe
PID 1064 wrote to memory of 268	1064	dllhost.exe	dllhost.exe
PID 1064 wrote to memory of 268	1064	dllhost.exe	dllhost.exe
PID 1244 wrote to memory of 1048	1244	Explorer.EXE	rundll32.exe
PID 1244 wrote to memory of 1048	1244	Explorer.EXE	rundll32.exe
PID 1244 wrote to memory of 1048	1244	Explorer.EXE	rundll32.exe
PID 1244 wrote to memory of 1048	1244	Explorer.EXE	rundll32.exe
PID 1244 wrote to memory of 1048	1244	Explorer.EXE	rundll32.exe
PID 1244 wrote to memory of 1048	1244	Explorer.EXE	rundll32.exe
PID 1244 wrote to memory of 1048	1244	Explorer.EXE	rundll32.exe
PID 1048 wrote to memory of 1500	1048	rundll32.exe	cmd.exe
PID 1048 wrote to memory of 1500	1048	rundll32.exe	cmd.exe
PID 1048 wrote to memory of 1500	1048	rundll32.exe	cmd.exe
PID 1048 wrote to memory of 1500	1048	rundll32.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:1244

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:1064

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:268

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\SysWOW64\rundll32.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1048

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\dllhost.exe"
3⤵
- Deletes itself
PID:1500

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/268-67-0x000000000041EB80-mapping.dmp

Download
memory/268-66-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/268-69-0x0000000000340000-0x0000000000354000-memory.dmp

Filesize
80KB

Download
memory/268-68-0x00000000009F0000-0x0000000000CF3000-memory.dmp

Filesize
3.0MB

Download
memory/1048-71-0x0000000000000000-mapping.dmp

Download
memory/1048-77-0x0000000001F50000-0x0000000001FE3000-memory.dmp

Filesize
588KB

Download
memory/1048-76-0x00000000020E0000-0x00000000023E3000-memory.dmp

Filesize
3.0MB

Download
memory/1048-75-0x00000000000F0000-0x000000000011E000-memory.dmp

Filesize
184KB

Download
memory/1048-74-0x0000000000860000-0x000000000086E000-memory.dmp

Filesize
56KB

Download
memory/1048-72-0x0000000076661000-0x0000000076663000-memory.dmp

Filesize
8KB

Download
memory/1064-65-0x0000000004190000-0x00000000041C0000-memory.dmp

Filesize
192KB

Download
memory/1064-60-0x0000000000130000-0x0000000000131000-memory.dmp

Filesize
4KB

Download
memory/1064-64-0x0000000005410000-0x00000000054AC000-memory.dmp

Filesize
624KB

Download
memory/1064-63-0x0000000004F00000-0x0000000004F01000-memory.dmp

Filesize
4KB

Download
memory/1064-62-0x0000000000520000-0x0000000000538000-memory.dmp

Filesize
96KB

Download
memory/1244-70-0x0000000006CC0000-0x0000000006E4A000-memory.dmp

Filesize
1.5MB

Download
memory/1244-78-0x0000000006F80000-0x000000000709D000-memory.dmp

Filesize
1.1MB

Download
memory/1500-73-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads