formbook | e790d3b335685462e33550be9839373d1a52c0f3048aafaf9ff9bcdcd4a721a6

General

Target

PO.exe
Size

228KB
MD5

2593eef7b38e160b9697f2479fa8843f
SHA1

25d4d88f321321fb5b2b316fd5dbcd5bb144daa1
SHA256

b35de004189f271fe754dd614e5fbbc299425f5aca9ebf1f935bf26696964853
SHA512

c5beb57aae9c18ca5d7d73954216abc6a07871666d08a654d7b5d8e1d25b0defe9ca66eee77325bed03870a39757c85df13f868472447369bd2903ba05336a21

Score

10^/10

formbook rat spyware stealer 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

Formbook Payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1164-117-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral2/memory/3056-123-0x0000000000C00000-0x0000000000C2E000-memory.dmp	formbook

Loads dropped DLL 1 IoCs

Processes:

PO.exe

pid process

3680 PO.exe

pid	process
3680	PO.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

PO.exePO.exechkdsk.exe

description	pid	process	target process
PID 3680 set thread context of 1164	3680	PO.exe	PO.exe
PID 1164 set thread context of 3040	1164	PO.exe	Explorer.EXE
PID 3056 set thread context of 3040	3056	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

Modifies registry class 2 IoCs

Processes:

Explorer.EXE

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance	Explorer.EXE
Key created	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 60 IoCs

Processes:

PO.exechkdsk.exe

pid	process
1164	PO.exe
1164	PO.exe
1164	PO.exe
1164	PO.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe
3056	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3040 Explorer.EXE
Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

PO.exePO.exechkdsk.exe

pid process

3680 PO.exe
1164 PO.exe
1164 PO.exe
1164 PO.exe
3056 chkdsk.exe
3056 chkdsk.exe

pid	process
3040	Explorer.EXE

pid	process
3680	PO.exe
1164	PO.exe
1164	PO.exe
1164	PO.exe
3056	chkdsk.exe
3056	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

PO.exeExplorer.EXEchkdsk.exe

description	pid	process
Token: SeDebugPrivilege	1164	PO.exe
Token: SeShutdownPrivilege	3040	Explorer.EXE
Token: SeCreatePagefilePrivilege	3040	Explorer.EXE
Token: SeShutdownPrivilege	3040	Explorer.EXE
Token: SeCreatePagefilePrivilege	3040	Explorer.EXE
Token: SeDebugPrivilege	3056	chkdsk.exe

Suspicious use of UnmapMainImage 1 IoCs

Processes:

Explorer.EXE

pid process

3040 Explorer.EXE

pid	process
3040	Explorer.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

PO.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 3680 wrote to memory of 1164	3680	PO.exe	PO.exe
PID 3680 wrote to memory of 1164	3680	PO.exe	PO.exe
PID 3680 wrote to memory of 1164	3680	PO.exe	PO.exe
PID 3680 wrote to memory of 1164	3680	PO.exe	PO.exe
PID 3040 wrote to memory of 3056	3040	Explorer.EXE	chkdsk.exe
PID 3040 wrote to memory of 3056	3040	Explorer.EXE	chkdsk.exe
PID 3040 wrote to memory of 3056	3040	Explorer.EXE	chkdsk.exe
PID 3056 wrote to memory of 2752	3056	chkdsk.exe	cmd.exe
PID 3056 wrote to memory of 2752	3056	chkdsk.exe	cmd.exe
PID 3056 wrote to memory of 2752	3056	chkdsk.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3040

C:\Users\Admin\AppData\Local\Temp\PO.exe
"C:\Users\Admin\AppData\Local\Temp\PO.exe"
2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3680

C:\Users\Admin\AppData\Local\Temp\PO.exe
"C:\Users\Admin\AppData\Local\Temp\PO.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1164

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:3056

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\PO.exe"
3⤵
PID:2752

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\nsn28BD.tmp\k5ig8v1xqqd111h.dll
MD5
fe9e8afe6e228256eaf3065c403d87bb

SHA1
1d46976328242b9e4f37d994bc1f169ee1f4c112

SHA256
e2b161127954eb1373158a95ef083d1b00198fef933e9ad5a1496d82d9006b8b

SHA512
573399e2885f89f05e27de783ef286c79dab04ca4e942f62ccbbb40d61fc7ab80baa97b13948b719dcae785d5daa19e4aa23adb4922e9737e0ecbfc2a09ba4a5

Download Submit
memory/1164-117-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1164-115-0x000000000041EAF0-mapping.dmp

Download
memory/1164-118-0x0000000000A30000-0x0000000000D50000-memory.dmp

Filesize
3.1MB

Download
memory/1164-119-0x00000000005D0000-0x00000000005E4000-memory.dmp

Filesize
80KB

Download
memory/2752-124-0x0000000000000000-mapping.dmp

Download
memory/3040-120-0x00000000070E0000-0x0000000007221000-memory.dmp

Filesize
1.3MB

Download
memory/3040-127-0x0000000006DD0000-0x0000000006E7B000-memory.dmp

Filesize
684KB

Download
memory/3056-121-0x0000000000000000-mapping.dmp

Download
memory/3056-122-0x0000000000D80000-0x0000000000D8A000-memory.dmp

Filesize
40KB

Download
memory/3056-123-0x0000000000C00000-0x0000000000C2E000-memory.dmp

Filesize
184KB

Download
memory/3056-125-0x0000000005650000-0x0000000005970000-memory.dmp

Filesize
3.1MB

Download
memory/3056-126-0x0000000005420000-0x00000000054B3000-memory.dmp

Filesize
588KB

Download
memory/3680-116-0x0000000002F70000-0x0000000002F72000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads