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
behavioral2/memory/1624-125-0x000000000041EB80-mapping.dmp	formbook
behavioral2/memory/1624-124-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral2/memory/1036-132-0x00000000005C0000-0x00000000005EE000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

Processes:

dllhost.exedllhost.exeipconfig.exe

description	pid	process	target process
PID 2468 set thread context of 1624	2468	dllhost.exe	dllhost.exe
PID 1624 set thread context of 3040	1624	dllhost.exe	Explorer.EXE
PID 1036 set thread context of 3040	1036	ipconfig.exe	Explorer.EXE

Gathers network information 2 TTPs 1 IoCs
Uses commandline utility to view network configuration.

System Information Discovery
T1082

Command-Line Interface
T1059

Processes:

ipconfig.exe

pid process

1036 ipconfig.exe

pid	process
1036	ipconfig.exe

Suspicious behavior: EnumeratesProcesses 46 IoCs

Processes:

dllhost.exedllhost.exeipconfig.exe

pid	process
2468	dllhost.exe
2468	dllhost.exe
2468	dllhost.exe
2468	dllhost.exe
2468	dllhost.exe
2468	dllhost.exe
1624	dllhost.exe
1624	dllhost.exe
1624	dllhost.exe
1624	dllhost.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe
1036	ipconfig.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3040 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

dllhost.exeipconfig.exe

pid process

1624 dllhost.exe
1624 dllhost.exe
1624 dllhost.exe
1036 ipconfig.exe
1036 ipconfig.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

dllhost.exedllhost.exeipconfig.exe

description pid process

Token: SeDebugPrivilege 2468 dllhost.exe
Token: SeDebugPrivilege 1624 dllhost.exe
Token: SeDebugPrivilege 1036 ipconfig.exe

pid	process
3040	Explorer.EXE

pid	process
1624	dllhost.exe
1624	dllhost.exe
1624	dllhost.exe
1036	ipconfig.exe
1036	ipconfig.exe

description	pid	process
Token: SeDebugPrivilege	2468	dllhost.exe
Token: SeDebugPrivilege	1624	dllhost.exe
Token: SeDebugPrivilege	1036	ipconfig.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

dllhost.exeExplorer.EXEipconfig.exe

description	pid	process	target process
PID 2468 wrote to memory of 1624	2468	dllhost.exe	dllhost.exe
PID 2468 wrote to memory of 1624	2468	dllhost.exe	dllhost.exe
PID 2468 wrote to memory of 1624	2468	dllhost.exe	dllhost.exe
PID 2468 wrote to memory of 1624	2468	dllhost.exe	dllhost.exe
PID 2468 wrote to memory of 1624	2468	dllhost.exe	dllhost.exe
PID 2468 wrote to memory of 1624	2468	dllhost.exe	dllhost.exe
PID 3040 wrote to memory of 1036	3040	Explorer.EXE	ipconfig.exe
PID 3040 wrote to memory of 1036	3040	Explorer.EXE	ipconfig.exe
PID 3040 wrote to memory of 1036	3040	Explorer.EXE	ipconfig.exe
PID 1036 wrote to memory of 1300	1036	ipconfig.exe	cmd.exe
PID 1036 wrote to memory of 1300	1036	ipconfig.exe	cmd.exe
PID 1036 wrote to memory of 1300	1036	ipconfig.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3040

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:2468

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:1624

C:\Windows\SysWOW64\ipconfig.exe
"C:\Windows\SysWOW64\ipconfig.exe"
2⤵
- Suspicious use of SetThreadContext
- Gathers network information
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1036

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\dllhost.exe"
3⤵
PID:1300

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Command-Line Interface

1

T1059

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/1036-130-0x0000000000000000-mapping.dmp

Download
memory/1036-135-0x0000000000D40000-0x0000000000DD3000-memory.dmp

Filesize
588KB

Download
memory/1036-134-0x0000000002FC0000-0x00000000032E0000-memory.dmp

Filesize
3.1MB

Download
memory/1036-132-0x00000000005C0000-0x00000000005EE000-memory.dmp

Filesize
184KB

Download
memory/1036-131-0x0000000000FB0000-0x0000000000FBB000-memory.dmp

Filesize
44KB

Download
memory/1300-133-0x0000000000000000-mapping.dmp

Download
memory/1624-127-0x0000000001450000-0x0000000001770000-memory.dmp

Filesize
3.1MB

Download
memory/1624-128-0x0000000000FF0000-0x0000000001004000-memory.dmp

Filesize
80KB

Download
memory/1624-125-0x000000000041EB80-mapping.dmp

Download
memory/1624-124-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2468-122-0x000000000AC10000-0x000000000AC11000-memory.dmp

Filesize
4KB

Download
memory/2468-115-0x0000000000590000-0x0000000000591000-memory.dmp

Filesize
4KB

Download
memory/2468-123-0x000000000ADB0000-0x000000000ADFF000-memory.dmp

Filesize
316KB

Download
memory/2468-121-0x000000000AA10000-0x000000000AA17000-memory.dmp

Filesize
28KB

Download
memory/2468-120-0x0000000007250000-0x000000000774E000-memory.dmp

Filesize
5.0MB

Download
memory/2468-119-0x0000000007310000-0x0000000007311000-memory.dmp

Filesize
4KB

Download
memory/2468-118-0x0000000007330000-0x0000000007331000-memory.dmp

Filesize
4KB

Download
memory/2468-117-0x0000000007750000-0x0000000007751000-memory.dmp

Filesize
4KB

Download
memory/3040-129-0x0000000004E90000-0x000000000501C000-memory.dmp

Filesize
1.5MB

Download
memory/3040-136-0x0000000005020000-0x00000000051A9000-memory.dmp

Filesize
1.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads