formbook | 63abc500d2a9f12692276d1cd2becc0ce16719ab69a69ea9827bd411f12b4291

Analysis

max time kernel
150s
max time network
148s
platform
windows7_x64
resource
win7v20210410
submitted
06-05-2021 21:56

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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

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
behavioral9/memory/1160-64-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral9/memory/1640-72-0x0000000000090000-0x00000000000BE000-memory.dmp	formbook

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1720 cmd.exe
Loads dropped DLL 1 IoCs

Processes:

PO.exe

pid process

1088 PO.exe

pid	process
1720	cmd.exe

pid	process
1088	PO.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

PO.exePO.exewuapp.exe

description	pid	process	target process
PID 1088 set thread context of 1160	1088	PO.exe	PO.exe
PID 1160 set thread context of 1248	1160	PO.exe	Explorer.EXE
PID 1160 set thread context of 1248	1160	PO.exe	Explorer.EXE
PID 1640 set thread context of 1248	1640	wuapp.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 29 IoCs

Processes:

PO.exewuapp.exe

pid	process
1160	PO.exe
1160	PO.exe
1160	PO.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe
1640	wuapp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1248 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

PO.exePO.exewuapp.exe

pid process

1088 PO.exe
1160 PO.exe
1160 PO.exe
1160 PO.exe
1160 PO.exe
1640 wuapp.exe
1640 wuapp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

PO.exewuapp.exe

description pid process

Token: SeDebugPrivilege 1160 PO.exe
Token: SeDebugPrivilege 1640 wuapp.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE
1248 Explorer.EXE

pid	process
1248	Explorer.EXE

pid	process
1088	PO.exe
1160	PO.exe
1160	PO.exe
1160	PO.exe
1160	PO.exe
1640	wuapp.exe
1640	wuapp.exe

description	pid	process
Token: SeDebugPrivilege	1160	PO.exe
Token: SeDebugPrivilege	1640	wuapp.exe

pid	process
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE

pid	process
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE
1248	Explorer.EXE

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

PO.exePO.exewuapp.exe

description	pid	process	target process
PID 1088 wrote to memory of 1160	1088	PO.exe	PO.exe
PID 1088 wrote to memory of 1160	1088	PO.exe	PO.exe
PID 1088 wrote to memory of 1160	1088	PO.exe	PO.exe
PID 1088 wrote to memory of 1160	1088	PO.exe	PO.exe
PID 1088 wrote to memory of 1160	1088	PO.exe	PO.exe
PID 1160 wrote to memory of 1640	1160	PO.exe	wuapp.exe
PID 1160 wrote to memory of 1640	1160	PO.exe	wuapp.exe
PID 1160 wrote to memory of 1640	1160	PO.exe	wuapp.exe
PID 1160 wrote to memory of 1640	1160	PO.exe	wuapp.exe
PID 1160 wrote to memory of 1640	1160	PO.exe	wuapp.exe
PID 1160 wrote to memory of 1640	1160	PO.exe	wuapp.exe
PID 1160 wrote to memory of 1640	1160	PO.exe	wuapp.exe
PID 1640 wrote to memory of 1720	1640	wuapp.exe	cmd.exe
PID 1640 wrote to memory of 1720	1640	wuapp.exe	cmd.exe
PID 1640 wrote to memory of 1720	1640	wuapp.exe	cmd.exe
PID 1640 wrote to memory of 1720	1640	wuapp.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:1248

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:1088

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
- Suspicious use of WriteProcessMemory
PID:1160

C:\Windows\SysWOW64\wuapp.exe
"C:\Windows\SysWOW64\wuapp.exe"
4⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1640

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\PO.exe"
5⤵
- Deletes itself
PID:1720

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\nsn31AD.tmp\k5ig8v1xqqd111h.dll
MD5
fe9e8afe6e228256eaf3065c403d87bb

SHA1
1d46976328242b9e4f37d994bc1f169ee1f4c112

SHA256
e2b161127954eb1373158a95ef083d1b00198fef933e9ad5a1496d82d9006b8b

SHA512
573399e2885f89f05e27de783ef286c79dab04ca4e942f62ccbbb40d61fc7ab80baa97b13948b719dcae785d5daa19e4aa23adb4922e9737e0ecbfc2a09ba4a5

Download Submit
memory/1088-62-0x0000000002460000-0x00000000030AA000-memory.dmp

Filesize
12.3MB

Download
memory/1088-60-0x0000000075281000-0x0000000075283000-memory.dmp

Filesize
8KB

Download
memory/1160-68-0x00000000006C0000-0x00000000006D4000-memory.dmp

Filesize
80KB

Download
memory/1160-66-0x00000000003E0000-0x00000000003F4000-memory.dmp

Filesize
80KB

Download
memory/1160-65-0x0000000000770000-0x0000000000A73000-memory.dmp

Filesize
3.0MB

Download
memory/1160-63-0x000000000041EAF0-mapping.dmp

Download
memory/1160-64-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1248-76-0x0000000006940000-0x0000000006A19000-memory.dmp

Filesize
868KB

Download
memory/1248-67-0x0000000004190000-0x000000000426E000-memory.dmp

Filesize
888KB

Download
memory/1248-69-0x0000000006AC0000-0x0000000006BC9000-memory.dmp

Filesize
1.0MB

Download
memory/1640-70-0x0000000000000000-mapping.dmp

Download
memory/1640-72-0x0000000000090000-0x00000000000BE000-memory.dmp

Filesize
184KB

Download
memory/1640-74-0x0000000001F00000-0x0000000002203000-memory.dmp

Filesize
3.0MB

Download
memory/1640-75-0x0000000001D60000-0x0000000001DF3000-memory.dmp

Filesize
588KB

Download
memory/1640-71-0x0000000000820000-0x000000000082B000-memory.dmp

Filesize
44KB

Download
memory/1720-73-0x0000000000000000-mapping.dmp

Download