formbook | dceb64db9d8bd8cabe13df904ff5f5b4b8006a16a63bbdd3ff4aaab52cfdc239

General

Target

fgr30031.exe
Size

282KB
MD5

902f81e7cc00c963acc14ab5d965358a
SHA1

fee22df6132712432cb79519ebbc58d23a5ef8d3
SHA256

616838e6dfff493e546f51436ee3c0bbe99d459c18abbbb71a6207555e9d73e6
SHA512

86e2d763a2c8e02b2167e8b3b5b5fd31b29e237c70d082683503c3302ef08113288a73f5024732c94b88c7361008292c6ac80970591c5795d203bcff06664fb0

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
behavioral2/memory/3552-116-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/3552-117-0x000000000041F120-mapping.dmp	formbook
behavioral2/memory/496-124-0x0000000004510000-0x000000000453F000-memory.dmp	formbook

Loads dropped DLL 1 IoCs

Processes:

fgr30031.exe

pid process

3012 fgr30031.exe

pid	process
3012	fgr30031.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

fgr30031.exefgr30031.exechkdsk.exe

description	pid	process	target process
PID 3012 set thread context of 3552	3012	fgr30031.exe	fgr30031.exe
PID 3552 set thread context of 3000	3552	fgr30031.exe	Explorer.EXE
PID 496 set thread context of 3000	496	chkdsk.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
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

chkdsk.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier chkdsk.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 60 IoCs

Processes:

fgr30031.exechkdsk.exe

pid	process
3552	fgr30031.exe
3552	fgr30031.exe
3552	fgr30031.exe
3552	fgr30031.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe
496	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3000 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

fgr30031.exechkdsk.exe

pid process

3552 fgr30031.exe
3552 fgr30031.exe
3552 fgr30031.exe
496 chkdsk.exe
496 chkdsk.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

fgr30031.exechkdsk.exe

description pid process

Token: SeDebugPrivilege 3552 fgr30031.exe
Token: SeDebugPrivilege 496 chkdsk.exe

pid	process
3000	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	3552	fgr30031.exe
Token: SeDebugPrivilege	496	chkdsk.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

fgr30031.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 3012 wrote to memory of 3552	3012	fgr30031.exe	fgr30031.exe
PID 3012 wrote to memory of 3552	3012	fgr30031.exe	fgr30031.exe
PID 3012 wrote to memory of 3552	3012	fgr30031.exe	fgr30031.exe
PID 3012 wrote to memory of 3552	3012	fgr30031.exe	fgr30031.exe
PID 3012 wrote to memory of 3552	3012	fgr30031.exe	fgr30031.exe
PID 3012 wrote to memory of 3552	3012	fgr30031.exe	fgr30031.exe
PID 3000 wrote to memory of 496	3000	Explorer.EXE	chkdsk.exe
PID 3000 wrote to memory of 496	3000	Explorer.EXE	chkdsk.exe
PID 3000 wrote to memory of 496	3000	Explorer.EXE	chkdsk.exe
PID 496 wrote to memory of 912	496	chkdsk.exe	cmd.exe
PID 496 wrote to memory of 912	496	chkdsk.exe	cmd.exe
PID 496 wrote to memory of 912	496	chkdsk.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3000

C:\Users\Admin\AppData\Local\Temp\fgr30031.exe
"C:\Users\Admin\AppData\Local\Temp\fgr30031.exe"
2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3012

C:\Users\Admin\AppData\Local\Temp\fgr30031.exe
"C:\Users\Admin\AppData\Local\Temp\fgr30031.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3552

C:\Windows\SysWOW64\chkdsk.exe
"C:\Windows\SysWOW64\chkdsk.exe"
2⤵
- Suspicious use of SetThreadContext
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:496

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\fgr30031.exe"
3⤵
PID:912

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

2

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\nsnD6DA.tmp\dxmksrz.dll
MD5
7bc8e01846a2108e5bbdfdfc9aa14805

SHA1
e42c4cfdc2c5a19499c4c8744110b5cb783542ef

SHA256
d231020e3e3abcf9f17de87faf383aedc5c6e858767f909ce7f313aad47572a7

SHA512
62e8f416a20c6bcb84b8b20caf8717028152b61ffb495700e7fba29e0921372ede0c408f615eceaaf017f887b041acdce4796a06b333bc6a8af2c96e8f7006d0

Download Submit
memory/496-122-0x0000000000000000-mapping.dmp

Download
memory/496-127-0x0000000004B90000-0x0000000004C23000-memory.dmp

Filesize
588KB

Download
memory/496-126-0x0000000004DD0000-0x00000000050F0000-memory.dmp

Filesize
3.1MB

Download
memory/496-124-0x0000000004510000-0x000000000453F000-memory.dmp

Filesize
188KB

Download
memory/496-123-0x0000000000250000-0x000000000025A000-memory.dmp

Filesize
40KB

Download
memory/912-125-0x0000000000000000-mapping.dmp

Download
memory/3000-121-0x0000000004EC0000-0x0000000004FE7000-memory.dmp

Filesize
1.2MB

Download
memory/3000-128-0x00000000024F0000-0x000000000259C000-memory.dmp

Filesize
688KB

Download
memory/3552-119-0x00000000009C0000-0x0000000000CE0000-memory.dmp

Filesize
3.1MB

Download
memory/3552-120-0x0000000000E50000-0x0000000000E64000-memory.dmp

Filesize
80KB

Download
memory/3552-117-0x000000000041F120-mapping.dmp

Download
memory/3552-116-0x0000000000400000-0x000000000042F000-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