formbook | 4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7

General

Target

4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe
Size

436KB
MD5

9284392fd96b31b3de8d8f664de3f0e4
SHA1

9b2e8d834a7e50ec7e674433d019dbd19996036c
SHA256

4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7
SHA512

61efcc329ba8f50c32de43ba0bfc66e6591158c12fcb095dfa3652e54fc799255a49e44c62f2022b807d51b432050f85d94a172dc0e186af40a21e3848c7c922

Score

10^/10

formbook o4ms rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

o4ms

C2

http://www.nocodehost.com/o4ms/

Decoy

fishingboatpub.com

trebor72.com

qualitycleanaustralia.com

amphilykenyx.com

jayte90.net

alveegrace.com

le-fleursoleil.com

volumoffer.com

businessbookwriters.com

alpin-art.com

firsttastetogo.com

catofc.com

ref-290.com

sbo2008.com

fortlauderdaleelevators.com

shanghaiyalian.com

majestybags.com

afcerd.com

myceliated.com

ls0a.com

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook

Formbook Payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/4824-122-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/4824-123-0x000000000041EAB0-mapping.dmp	formbook

Executes dropped EXE 1 IoCs

Processes:

browse.exe

pid process

2256 browse.exe

pid	process
2256	browse.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe

description	pid	process	target process
PID 4724 set thread context of 4824	4724	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.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

4352 schtasks.exe

pid	process
4352	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe

pid	process
4824	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe
4824	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exebrowse.exe

description	pid	process
Token: SeDebugPrivilege	4724	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe
Token: SeDebugPrivilege	2256	browse.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.execmd.exe

description	pid	process	target process
PID 4724 wrote to memory of 4824	4724	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe
PID 4724 wrote to memory of 4824	4724	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe
PID 4724 wrote to memory of 4824	4724	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe
PID 4724 wrote to memory of 4824	4724	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe
PID 4724 wrote to memory of 4824	4724	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe
PID 4724 wrote to memory of 4824	4724	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe
PID 4724 wrote to memory of 4332	4724	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe	cmd.exe
PID 4724 wrote to memory of 4332	4724	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe	cmd.exe
PID 4724 wrote to memory of 4332	4724	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe	cmd.exe
PID 4724 wrote to memory of 4060	4724	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe	cmd.exe
PID 4724 wrote to memory of 4060	4724	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe	cmd.exe
PID 4724 wrote to memory of 4060	4724	4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe	cmd.exe
PID 4332 wrote to memory of 4352	4332	cmd.exe	schtasks.exe
PID 4332 wrote to memory of 4352	4332	cmd.exe	schtasks.exe
PID 4332 wrote to memory of 4352	4332	cmd.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe
"C:\Users\Admin\AppData\Local\Temp\4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4724

C:\Users\Admin\AppData\Local\Temp\4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe
"C:\Users\Admin\AppData\Local\Temp\4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
PID:4824

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /sc minute /mo 1 /tn "Nano" /tr "'C:\Users\Admin\AppData\Roaming\browse\browse.exe'" /f
2⤵
- Suspicious use of WriteProcessMemory
PID:4332

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /sc minute /mo 1 /tn "Nano" /tr "'C:\Users\Admin\AppData\Roaming\browse\browse.exe'" /f
3⤵
- Creates scheduled task(s)
PID:4352

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c copy "C:\Users\Admin\AppData\Local\Temp\4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7.exe" "C:\Users\Admin\AppData\Roaming\browse\browse.exe"
2⤵
PID:4060

C:\Users\Admin\AppData\Roaming\browse\browse.exe
C:\Users\Admin\AppData\Roaming\browse\browse.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2256

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

C:\Users\Admin\AppData\Roaming\browse\browse.exe
MD5
9284392fd96b31b3de8d8f664de3f0e4

SHA1
9b2e8d834a7e50ec7e674433d019dbd19996036c

SHA256
4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7

SHA512
61efcc329ba8f50c32de43ba0bfc66e6591158c12fcb095dfa3652e54fc799255a49e44c62f2022b807d51b432050f85d94a172dc0e186af40a21e3848c7c922

Download Submit
C:\Users\Admin\AppData\Roaming\browse\browse.exe
MD5
9284392fd96b31b3de8d8f664de3f0e4

SHA1
9b2e8d834a7e50ec7e674433d019dbd19996036c

SHA256
4f8799e5441c553ebbda342b6b06356a70dc432e5ac0434f4158146520b57ab7

SHA512
61efcc329ba8f50c32de43ba0bfc66e6591158c12fcb095dfa3652e54fc799255a49e44c62f2022b807d51b432050f85d94a172dc0e186af40a21e3848c7c922

Download Submit
memory/2256-136-0x0000000004B40000-0x0000000004B41000-memory.dmp

Filesize
4KB

Download
memory/2256-130-0x0000000000260000-0x0000000000261000-memory.dmp

Filesize
4KB

Download
memory/4060-126-0x0000000000000000-mapping.dmp

Download
memory/4332-125-0x0000000000000000-mapping.dmp

Download
memory/4352-127-0x0000000000000000-mapping.dmp

Download
memory/4724-120-0x0000000005260000-0x0000000005261000-memory.dmp

Filesize
4KB

Download
memory/4724-121-0x00000000055A0000-0x00000000055A1000-memory.dmp

Filesize
4KB

Download
memory/4724-115-0x0000000000C70000-0x0000000000C71000-memory.dmp

Filesize
4KB

Download
memory/4724-119-0x0000000005270000-0x0000000005271000-memory.dmp

Filesize
4KB

Download
memory/4724-118-0x0000000005150000-0x0000000005151000-memory.dmp

Filesize
4KB

Download
memory/4724-117-0x0000000005770000-0x0000000005771000-memory.dmp

Filesize
4KB

Download
memory/4824-124-0x0000000001790000-0x0000000001AB0000-memory.dmp

Filesize
3.1MB

Download
memory/4824-123-0x000000000041EAB0-mapping.dmp

Download
memory/4824-122-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads