formbook | 1bb913d6f594107a8c8d4d64f9a3de85c602813d9ad93189b9949fbc8a93aa32

General

Target

pos.exe
Size

454KB
MD5

0082bb1c3ac5dc499f6db3d45de0ab3e
SHA1

90eb55324f4068a4fde1da25ca7a3eff65d17e1e
SHA256

1bb913d6f594107a8c8d4d64f9a3de85c602813d9ad93189b9949fbc8a93aa32
SHA512

e42c5af62527c2193d3f49f93918535b656f9d0a34065657df8273e606405b551e9f939450a134c20c58429951fbe7a27c14e19e66eeee57446349eaf7e30384

Score

10^/10

formbook u1bs rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

u1bs

C2

http://www.vgmpradio.com/u1bs/

Decoy

ln-safe-keepingmisva4.xyz

rtfh.xyz

awolin.link

metadlf.com

cardboardcasual.com

psicoterapiahablada.com

spaminator.xyz

hnjqzl.top

dentalyinovasi.site

biosynblas.com

zvyk.store

shreevishwakarmaservices.com

showersplash.com

norbert-roth.com

londoncapitaltraders.com

istanbuldonerkebabheroncity.com

realdiscountsnow.com

marlinplumbingwnc.com

magazinadziavane.com

qantv.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/1608-125-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/1608-126-0x000000000041F130-mapping.dmp	formbook
behavioral2/memory/2760-133-0x0000000002A00000-0x0000000002A2F000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

Processes:

pos.exepos.exerundll32.exe

description	pid	process	target process
PID 3444 set thread context of 1608	3444	pos.exe	pos.exe
PID 1608 set thread context of 2580	1608	pos.exe	Explorer.EXE
PID 2760 set thread context of 2580	2760	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
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

3420 schtasks.exe

pid	process
3420	schtasks.exe

Suspicious behavior: EnumeratesProcesses 46 IoCs

Processes:

pos.exerundll32.exe

pid	process
1608	pos.exe
1608	pos.exe
1608	pos.exe
1608	pos.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe
2760	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2580 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

pos.exerundll32.exe

pid process

1608 pos.exe
1608 pos.exe
1608 pos.exe
2760 rundll32.exe
2760 rundll32.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

pos.exerundll32.exe

description pid process

Token: SeDebugPrivilege 1608 pos.exe
Token: SeDebugPrivilege 2760 rundll32.exe

pid	process
2580	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1608	pos.exe
Token: SeDebugPrivilege	2760	rundll32.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

pos.exeExplorer.EXErundll32.exe

description	pid	process	target process
PID 3444 wrote to memory of 3420	3444	pos.exe	schtasks.exe
PID 3444 wrote to memory of 3420	3444	pos.exe	schtasks.exe
PID 3444 wrote to memory of 3420	3444	pos.exe	schtasks.exe
PID 3444 wrote to memory of 1608	3444	pos.exe	pos.exe
PID 3444 wrote to memory of 1608	3444	pos.exe	pos.exe
PID 3444 wrote to memory of 1608	3444	pos.exe	pos.exe
PID 3444 wrote to memory of 1608	3444	pos.exe	pos.exe
PID 3444 wrote to memory of 1608	3444	pos.exe	pos.exe
PID 3444 wrote to memory of 1608	3444	pos.exe	pos.exe
PID 2580 wrote to memory of 2760	2580	Explorer.EXE	rundll32.exe
PID 2580 wrote to memory of 2760	2580	Explorer.EXE	rundll32.exe
PID 2580 wrote to memory of 2760	2580	Explorer.EXE	rundll32.exe
PID 2760 wrote to memory of 1056	2760	rundll32.exe	cmd.exe
PID 2760 wrote to memory of 1056	2760	rundll32.exe	cmd.exe
PID 2760 wrote to memory of 1056	2760	rundll32.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2580

C:\Users\Admin\AppData\Local\Temp\pos.exe
"C:\Users\Admin\AppData\Local\Temp\pos.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3444

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YAeSiES" /XML "C:\Users\Admin\AppData\Local\Temp\tmp607B.tmp"
3⤵
- Creates scheduled task(s)
PID:3420

C:\Users\Admin\AppData\Local\Temp\pos.exe
"C:\Users\Admin\AppData\Local\Temp\pos.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1608

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:2760

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\pos.exe"
3⤵
PID:1056

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/1056-135-0x0000000000000000-mapping.dmp

Download
memory/1608-125-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1608-128-0x0000000001170000-0x0000000001490000-memory.dmp

Filesize
3.1MB

Download
memory/1608-129-0x0000000000EA0000-0x0000000000EB4000-memory.dmp

Filesize
80KB

Download
memory/1608-126-0x000000000041F130-mapping.dmp

Download
memory/2580-137-0x0000000005C30000-0x0000000005DBA000-memory.dmp

Filesize
1.5MB

Download
memory/2580-130-0x0000000005AD0000-0x0000000005C27000-memory.dmp

Filesize
1.3MB

Download
memory/2760-133-0x0000000002A00000-0x0000000002A2F000-memory.dmp

Filesize
188KB

Download
memory/2760-134-0x0000000004380000-0x00000000046A0000-memory.dmp

Filesize
3.1MB

Download
memory/2760-136-0x0000000004110000-0x00000000041A3000-memory.dmp

Filesize
588KB

Download
memory/2760-132-0x00000000001A0000-0x00000000001B3000-memory.dmp

Filesize
76KB

Download
memory/2760-131-0x0000000000000000-mapping.dmp

Download
memory/3420-124-0x0000000000000000-mapping.dmp

Download
memory/3444-120-0x00000000052E0000-0x00000000057DE000-memory.dmp

Filesize
5.0MB

Download
memory/3444-119-0x00000000052C0000-0x00000000052C1000-memory.dmp

Filesize
4KB

Download
memory/3444-121-0x00000000054A0000-0x00000000054A7000-memory.dmp

Filesize
28KB

Download
memory/3444-115-0x0000000000820000-0x0000000000821000-memory.dmp

Filesize
4KB

Download
memory/3444-122-0x0000000005FE0000-0x0000000005FE1000-memory.dmp

Filesize
4KB

Download
memory/3444-118-0x00000000052E0000-0x00000000052E1000-memory.dmp

Filesize
4KB

Download
memory/3444-123-0x0000000005770000-0x00000000057C0000-memory.dmp

Filesize
320KB

Download
memory/3444-117-0x00000000057E0000-0x00000000057E1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads