formbook | fa0d4eeae6c743ddc44d9664b0e6d44238beff477d1f4e9a560e68026a4264d9

General

Target

rrfee1234.exe
Size

257KB
MD5

ec50a0d1ba634421cc3301633343ed04
SHA1

bbb06fe1fb5e61e37a3e709228064ee318e6c74d
SHA256

fa0d4eeae6c743ddc44d9664b0e6d44238beff477d1f4e9a560e68026a4264d9
SHA512

39ce4a5d8ae8c33b8fda65443f7decc9661cc4ab4734810530bda3a8ab769223ce56b66eff1f679f4cb7da9fcfe14cfce7d17ae1576c99c4eb51bd20063de023

Score

10^/10

formbook rv9n rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

rv9n

C2

http://www.cjspizza.net/rv9n/

Decoy

olivia-grace.show

zhuwww.com

keiretsu.xyz

olidnh.space

searuleansec.com

2fastrepair.com

brooklynmetalroof.com

scodol.com

novaprint.pro

the-loaner.com

nextroundscap.com

zbwlggs.com

internetautodealer.com

xn--tornrealestate-ekb.com

yunjiuhuo.com

skandinaviskakryptobanken.com

coxivarag.rest

ophthalmologylab.com

zzzzgjcdbqnn98.net

doeful.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/1984-55-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/1984-56-0x000000000041F120-mapping.dmp	formbook
behavioral1/memory/1084-63-0x0000000000090000-0x00000000000BF000-memory.dmp	formbook

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1536 cmd.exe
Loads dropped DLL 1 IoCs

Processes:

rrfee1234.exe

pid process

1144 rrfee1234.exe

pid	process
1536	cmd.exe

pid	process
1144	rrfee1234.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

rrfee1234.exerrfee1234.exerundll32.exe

description	pid	process	target process
PID 1144 set thread context of 1984	1144	rrfee1234.exe	rrfee1234.exe
PID 1984 set thread context of 1392	1984	rrfee1234.exe	Explorer.EXE
PID 1084 set thread context of 1392	1084	rundll32.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

Suspicious behavior: EnumeratesProcesses 31 IoCs

Processes:

rrfee1234.exerundll32.exe

pid	process
1984	rrfee1234.exe
1984	rrfee1234.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe
1084	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1392 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

rrfee1234.exerundll32.exe

pid process

1984 rrfee1234.exe
1984 rrfee1234.exe
1984 rrfee1234.exe
1084 rundll32.exe
1084 rundll32.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

rrfee1234.exerundll32.exe

description pid process

Token: SeDebugPrivilege 1984 rrfee1234.exe
Token: SeDebugPrivilege 1084 rundll32.exe
Suspicious use of FindShellTrayWindow 6 IoCs

Processes:

Explorer.EXE

pid process

1392 Explorer.EXE
1392 Explorer.EXE
1392 Explorer.EXE
1392 Explorer.EXE
1392 Explorer.EXE
1392 Explorer.EXE
Suspicious use of SendNotifyMessage 6 IoCs

Processes:

Explorer.EXE

pid process

1392 Explorer.EXE
1392 Explorer.EXE
1392 Explorer.EXE
1392 Explorer.EXE
1392 Explorer.EXE
1392 Explorer.EXE

pid	process
1392	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1984	rrfee1234.exe
Token: SeDebugPrivilege	1084	rundll32.exe

pid	process
1392	Explorer.EXE
1392	Explorer.EXE
1392	Explorer.EXE
1392	Explorer.EXE
1392	Explorer.EXE
1392	Explorer.EXE

pid	process
1392	Explorer.EXE
1392	Explorer.EXE
1392	Explorer.EXE
1392	Explorer.EXE
1392	Explorer.EXE
1392	Explorer.EXE

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

rrfee1234.exeExplorer.EXErundll32.exe

description	pid	process	target process
PID 1144 wrote to memory of 1984	1144	rrfee1234.exe	rrfee1234.exe
PID 1144 wrote to memory of 1984	1144	rrfee1234.exe	rrfee1234.exe
PID 1144 wrote to memory of 1984	1144	rrfee1234.exe	rrfee1234.exe
PID 1144 wrote to memory of 1984	1144	rrfee1234.exe	rrfee1234.exe
PID 1144 wrote to memory of 1984	1144	rrfee1234.exe	rrfee1234.exe
PID 1144 wrote to memory of 1984	1144	rrfee1234.exe	rrfee1234.exe
PID 1144 wrote to memory of 1984	1144	rrfee1234.exe	rrfee1234.exe
PID 1392 wrote to memory of 1084	1392	Explorer.EXE	rundll32.exe
PID 1392 wrote to memory of 1084	1392	Explorer.EXE	rundll32.exe
PID 1392 wrote to memory of 1084	1392	Explorer.EXE	rundll32.exe
PID 1392 wrote to memory of 1084	1392	Explorer.EXE	rundll32.exe
PID 1392 wrote to memory of 1084	1392	Explorer.EXE	rundll32.exe
PID 1392 wrote to memory of 1084	1392	Explorer.EXE	rundll32.exe
PID 1392 wrote to memory of 1084	1392	Explorer.EXE	rundll32.exe
PID 1084 wrote to memory of 1536	1084	rundll32.exe	cmd.exe
PID 1084 wrote to memory of 1536	1084	rundll32.exe	cmd.exe
PID 1084 wrote to memory of 1536	1084	rundll32.exe	cmd.exe
PID 1084 wrote to memory of 1536	1084	rundll32.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:1392

C:\Users\Admin\AppData\Local\Temp\rrfee1234.exe
"C:\Users\Admin\AppData\Local\Temp\rrfee1234.exe"
2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1144

C:\Users\Admin\AppData\Local\Temp\rrfee1234.exe
"C:\Users\Admin\AppData\Local\Temp\rrfee1234.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1984

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:1084

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\rrfee1234.exe"
3⤵
- Deletes itself
PID:1536

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

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

\Users\Admin\AppData\Local\Temp\nsgAAA1.tmp\jsgdacail.dll
MD5
c3755ba829fe0ac168fde4f1f37ff531

SHA1
e534376fcaf95c9284fb242f8b962a85783e2956

SHA256
50d2bcd4477dc52e7c5dd1d2ee59a78133cb4ae3dd367aadc22053de8137a977

SHA512
d55473705589e789d5f92f79cf1c7dcefb7db21976829fc036593ef5de1eaf02a0c002fc9457b65314bba33bd6a05d06e31341bb147472f2160136e189c0a30b

Download Submit
memory/1084-60-0x0000000000000000-mapping.dmp

Download
memory/1084-66-0x0000000001D40000-0x0000000001DD3000-memory.dmp

Filesize
588KB

Download
memory/1084-64-0x0000000002030000-0x0000000002333000-memory.dmp

Filesize
3.0MB

Download
memory/1084-63-0x0000000000090000-0x00000000000BF000-memory.dmp

Filesize
188KB

Download
memory/1084-62-0x0000000000430000-0x000000000043E000-memory.dmp

Filesize
56KB

Download
memory/1144-53-0x0000000076581000-0x0000000076583000-memory.dmp

Filesize
8KB

Download
memory/1392-59-0x0000000006BB0000-0x0000000006D4F000-memory.dmp

Filesize
1.6MB

Download
memory/1392-67-0x0000000007B40000-0x0000000007CAD000-memory.dmp

Filesize
1.4MB

Download
memory/1536-65-0x0000000000000000-mapping.dmp

Download
memory/1984-57-0x0000000000950000-0x0000000000C53000-memory.dmp

Filesize
3.0MB

Download
memory/1984-58-0x00000000003C0000-0x00000000003D4000-memory.dmp

Filesize
80KB

Download
memory/1984-56-0x000000000041F120-mapping.dmp

Download
memory/1984-55-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads