formbook | b506bb786b2b45d252f9886ad94e63cb60b60544dade0680b096f80c84cada7a

General

Target

invoice.lzh.exe
Size

530KB
MD5

d8135073743eead59a3ecde61bf051ca
SHA1

11a89d02e31a429b48295da8cd1c760a7ceae38d
SHA256

b506bb786b2b45d252f9886ad94e63cb60b60544dade0680b096f80c84cada7a
SHA512

15fe12c916712fab35377a7459da35624b5ed3d218c0bb7beab17a932a1883a333e0679122ce70130278d34dba9fc2d2033c8cec4024646bd73ab8702b28210b

Score

10^/10

formbook rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

C2

http://www.knighttechinca.com/dxe/

Decoy

sardarfarm.com

959tremont.com

privat-livecam.net

ansel-homebakery.com

joysupermarket.com

peninsulamatchmakers.net

northsytyle.com

radioconexaoubermusic.com

relocatingrealtor.com

desyrnan.com

onlinehoortoestel.online

enpointe.online

rvvikings.com

paulpoirier.com

shitarpa.net

kerneis.net

rokitreach.com

essentiallygaia.com

prestiged.net

fuerzaagavera.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

Formbook Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/8-129-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral2/memory/8-130-0x000000000041EAF0-mapping.dmp	formbook
behavioral2/memory/1360-137-0x00000000026E0000-0x000000000270E000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

Processes:

invoice.lzh.exeinvoice.lzh.exeNETSTAT.EXE

description	pid	process	target process
PID 2016 set thread context of 8	2016	invoice.lzh.exe	invoice.lzh.exe
PID 8 set thread context of 3036	8	invoice.lzh.exe	Explorer.EXE
PID 1360 set thread context of 3036	1360	NETSTAT.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
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

3576 schtasks.exe
Gathers network information 2 TTPs 1 IoCs
Uses commandline utility to view network configuration.

System Information Discovery
T1082

Command-Line Interface
T1059

Processes:

NETSTAT.EXE

pid process

1360 NETSTAT.EXE

pid	process
3576	schtasks.exe

pid	process
1360	NETSTAT.EXE

Suspicious behavior: EnumeratesProcesses 49 IoCs

Processes:

invoice.lzh.exeinvoice.lzh.exeNETSTAT.EXE

pid	process
2016	invoice.lzh.exe
8	invoice.lzh.exe
8	invoice.lzh.exe
8	invoice.lzh.exe
8	invoice.lzh.exe
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE
1360	NETSTAT.EXE

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3036 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

invoice.lzh.exeNETSTAT.EXE

pid process

8 invoice.lzh.exe
8 invoice.lzh.exe
8 invoice.lzh.exe
1360 NETSTAT.EXE
1360 NETSTAT.EXE
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

invoice.lzh.exeinvoice.lzh.exeNETSTAT.EXE

description pid process

Token: SeDebugPrivilege 2016 invoice.lzh.exe
Token: SeDebugPrivilege 8 invoice.lzh.exe
Token: SeDebugPrivilege 1360 NETSTAT.EXE
Suspicious use of UnmapMainImage 1 IoCs

Processes:

Explorer.EXE

pid process

3036 Explorer.EXE

pid	process
3036	Explorer.EXE

pid	process
8	invoice.lzh.exe
8	invoice.lzh.exe
8	invoice.lzh.exe
1360	NETSTAT.EXE
1360	NETSTAT.EXE

description	pid	process
Token: SeDebugPrivilege	2016	invoice.lzh.exe
Token: SeDebugPrivilege	8	invoice.lzh.exe
Token: SeDebugPrivilege	1360	NETSTAT.EXE

pid	process
3036	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

invoice.lzh.exeExplorer.EXENETSTAT.EXE

description	pid	process	target process
PID 2016 wrote to memory of 3576	2016	invoice.lzh.exe	schtasks.exe
PID 2016 wrote to memory of 3576	2016	invoice.lzh.exe	schtasks.exe
PID 2016 wrote to memory of 3576	2016	invoice.lzh.exe	schtasks.exe
PID 2016 wrote to memory of 8	2016	invoice.lzh.exe	invoice.lzh.exe
PID 2016 wrote to memory of 8	2016	invoice.lzh.exe	invoice.lzh.exe
PID 2016 wrote to memory of 8	2016	invoice.lzh.exe	invoice.lzh.exe
PID 2016 wrote to memory of 8	2016	invoice.lzh.exe	invoice.lzh.exe
PID 2016 wrote to memory of 8	2016	invoice.lzh.exe	invoice.lzh.exe
PID 2016 wrote to memory of 8	2016	invoice.lzh.exe	invoice.lzh.exe
PID 3036 wrote to memory of 1360	3036	Explorer.EXE	NETSTAT.EXE
PID 3036 wrote to memory of 1360	3036	Explorer.EXE	NETSTAT.EXE
PID 3036 wrote to memory of 1360	3036	Explorer.EXE	NETSTAT.EXE
PID 1360 wrote to memory of 3184	1360	NETSTAT.EXE	cmd.exe
PID 1360 wrote to memory of 3184	1360	NETSTAT.EXE	cmd.exe
PID 1360 wrote to memory of 3184	1360	NETSTAT.EXE	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3036

C:\Users\Admin\AppData\Local\Temp\invoice.lzh.exe
"C:\Users\Admin\AppData\Local\Temp\invoice.lzh.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2016

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\HPjuSZknbJLLSG" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE4A9.tmp"
3⤵
- Creates scheduled task(s)
PID:3576

C:\Users\Admin\AppData\Local\Temp\invoice.lzh.exe
"{path}"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:8

C:\Windows\SysWOW64\NETSTAT.EXE
"C:\Windows\SysWOW64\NETSTAT.EXE"
2⤵
- Suspicious use of SetThreadContext
- Gathers network information
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1360

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\invoice.lzh.exe"
3⤵
PID:3184

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Command-Line Interface

1

T1059

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpE4A9.tmp
MD5
303b5de4931c2a16c9a0aec17f9ccec9

SHA1
b4c2744984a4ba746771f12bfaa1b14e3693a76a

SHA256
911cb439a3595b40373bc91dfdd91014a7f964e497d6f8d8c138adb1f7e14239

SHA512
d7e673664e1688040d697c3d5b7719aa4b70ffbc13efe2c92838f4ad4ec1728b689f72303c74ca2891b3119783414d652a2dabd15189e514676e0a91a795dffa

Download Submit
memory/8-131-0x0000000001290000-0x00000000015B0000-memory.dmp

Filesize
3.1MB

Download
memory/8-132-0x00000000015E0000-0x00000000015F4000-memory.dmp

Filesize
80KB

Download
memory/8-130-0x000000000041EAF0-mapping.dmp

Download
memory/8-129-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1360-139-0x00000000029E0000-0x0000000002A73000-memory.dmp

Filesize
588KB

Download
memory/1360-137-0x00000000026E0000-0x000000000270E000-memory.dmp

Filesize
184KB

Download
memory/1360-136-0x0000000000050000-0x000000000005B000-memory.dmp

Filesize
44KB

Download
memory/1360-134-0x0000000000000000-mapping.dmp

Download
memory/1360-138-0x0000000002B50000-0x0000000002E70000-memory.dmp

Filesize
3.1MB

Download
memory/2016-120-0x0000000004BD0000-0x0000000004BD1000-memory.dmp

Filesize
4KB

Download
memory/2016-126-0x00000000051A0000-0x00000000051D9000-memory.dmp

Filesize
228KB

Download
memory/2016-125-0x0000000005230000-0x00000000052B9000-memory.dmp

Filesize
548KB

Download
memory/2016-124-0x0000000004C03000-0x0000000004C05000-memory.dmp

Filesize
8KB

Download
memory/2016-123-0x0000000004CC0000-0x0000000004CC1000-memory.dmp

Filesize
4KB

Download
memory/2016-122-0x0000000004C10000-0x0000000004C12000-memory.dmp

Filesize
8KB

Download
memory/2016-121-0x000000000E1A0000-0x000000000E1A1000-memory.dmp

Filesize
4KB

Download
memory/2016-119-0x0000000004C00000-0x0000000004C01000-memory.dmp

Filesize
4KB

Download
memory/2016-114-0x0000000000130000-0x0000000000131000-memory.dmp

Filesize
4KB

Download
memory/2016-118-0x0000000009ED0000-0x0000000009ED1000-memory.dmp

Filesize
4KB

Download
memory/2016-117-0x000000000A3D0000-0x000000000A3D1000-memory.dmp

Filesize
4KB

Download
memory/2016-116-0x0000000006E60000-0x0000000006EC6000-memory.dmp

Filesize
408KB

Download
memory/3036-133-0x00000000058A0000-0x0000000005964000-memory.dmp

Filesize
784KB

Download
memory/3036-140-0x0000000005A30000-0x0000000005BA2000-memory.dmp

Filesize
1.4MB

Download
memory/3184-135-0x0000000000000000-mapping.dmp

Download
memory/3576-127-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads