formbook | 63abc500d2a9f12692276d1cd2becc0ce16719ab69a69ea9827bd411f12b4291

Analysis

max time kernel
150s
max time network
144s
platform
windows10_x64
resource
win10v20210410
submitted
06-05-2021 22:02

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General

Target

BANK RECEIPT.exe
Size

280KB
MD5

6317a0b98ebd6f0ba716fc1b73b4bf31
SHA1

6f593ad2588b2ca2e561f0b47c9654df9fd95932
SHA256

a2e99d0aabd8f0ad83b885eccf313563526a58b2da435bf34dad29294c712efe
SHA512

e29265b8cc385be1c86751dd04dd2a70d727e8e298cd0d0ca250c2c6515c8d1c189511c564de11cf9c3c85d3efed1e23f7ad4b91bcca156b6b7c4341195f449a

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
behavioral2/memory/204-117-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral2/memory/3696-123-0x00000000004E0000-0x000000000050E000-memory.dmp	formbook

Loads dropped DLL 1 IoCs

Processes:

BANK RECEIPT.exe

pid process

500 BANK RECEIPT.exe

pid	process
500	BANK RECEIPT.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

BANK RECEIPT.exeBANK RECEIPT.execmstp.exe

description	pid	process	target process
PID 500 set thread context of 204	500	BANK RECEIPT.exe	BANK RECEIPT.exe
PID 204 set thread context of 2716	204	BANK RECEIPT.exe	Explorer.EXE
PID 3696 set thread context of 2716	3696	cmstp.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 60 IoCs

Processes:

BANK RECEIPT.execmstp.exe

pid	process
204	BANK RECEIPT.exe
204	BANK RECEIPT.exe
204	BANK RECEIPT.exe
204	BANK RECEIPT.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe
3696	cmstp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2716 Explorer.EXE
Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

BANK RECEIPT.exeBANK RECEIPT.execmstp.exe

pid process

500 BANK RECEIPT.exe
204 BANK RECEIPT.exe
204 BANK RECEIPT.exe
204 BANK RECEIPT.exe
3696 cmstp.exe
3696 cmstp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

BANK RECEIPT.execmstp.exe

description pid process

Token: SeDebugPrivilege 204 BANK RECEIPT.exe
Token: SeDebugPrivilege 3696 cmstp.exe
Suspicious use of UnmapMainImage 1 IoCs

Processes:

Explorer.EXE

pid process

2716 Explorer.EXE

pid	process
2716	Explorer.EXE

pid	process
500	BANK RECEIPT.exe
204	BANK RECEIPT.exe
204	BANK RECEIPT.exe
204	BANK RECEIPT.exe
3696	cmstp.exe
3696	cmstp.exe

description	pid	process
Token: SeDebugPrivilege	204	BANK RECEIPT.exe
Token: SeDebugPrivilege	3696	cmstp.exe

pid	process
2716	Explorer.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

BANK RECEIPT.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 500 wrote to memory of 204	500	BANK RECEIPT.exe	BANK RECEIPT.exe
PID 500 wrote to memory of 204	500	BANK RECEIPT.exe	BANK RECEIPT.exe
PID 500 wrote to memory of 204	500	BANK RECEIPT.exe	BANK RECEIPT.exe
PID 500 wrote to memory of 204	500	BANK RECEIPT.exe	BANK RECEIPT.exe
PID 2716 wrote to memory of 3696	2716	Explorer.EXE	cmstp.exe
PID 2716 wrote to memory of 3696	2716	Explorer.EXE	cmstp.exe
PID 2716 wrote to memory of 3696	2716	Explorer.EXE	cmstp.exe
PID 3696 wrote to memory of 744	3696	cmstp.exe	cmd.exe
PID 3696 wrote to memory of 744	3696	cmstp.exe	cmd.exe
PID 3696 wrote to memory of 744	3696	cmstp.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2716
- C:\Users\Admin\AppData\Local\Temp\BANK RECEIPT.exe
  "C:\Users\Admin\AppData\Local\Temp\BANK RECEIPT.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:500
- - C:\Users\Admin\AppData\Local\Temp\BANK RECEIPT.exe
    "C:\Users\Admin\AppData\Local\Temp\BANK RECEIPT.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:204
- C:\Windows\SysWOW64\cmstp.exe
  "C:\Windows\SysWOW64\cmstp.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3696
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\BANK RECEIPT.exe"
    3⤵
    PID:744

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nsf13AF.tmp\2g6ght2plrugud.dll

MD5
64ade443342d3aa3790c2846abf93959

SHA1
d6668f6881d40dc3dc3d1f627f2721e1d333e698

SHA256
ea1deb95fa6614524006ee3260957aef27ebd563f609dde680cace5f2ea09e45

SHA512
2fdce6c768ded710d6d011be5317b184a09e10058145bdff545e83df63f5e0f46db4f679161174397b37d0fb2f43abe7275405845742e4a73bc6ef995edf4845

Download Submit
memory/204-116-0x000000000041EAF0-mapping.dmp

Download
memory/204-118-0x0000000000950000-0x0000000000C70000-memory.dmp

Filesize
3.1MB

Download
memory/204-117-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/204-119-0x00000000008E0000-0x00000000008F4000-memory.dmp

Filesize
80KB

Download
memory/500-115-0x00000000030C0000-0x00000000030C2000-memory.dmp

Filesize
8KB

Download
memory/744-124-0x0000000000000000-mapping.dmp

Download
memory/2716-120-0x0000000005180000-0x00000000052FE000-memory.dmp

Filesize
1.5MB

Download
memory/2716-127-0x0000000002A90000-0x0000000002B58000-memory.dmp

Filesize
800KB

Download
memory/3696-122-0x0000000000FC0000-0x0000000000FD6000-memory.dmp

Filesize
88KB

Download
memory/3696-123-0x00000000004E0000-0x000000000050E000-memory.dmp

Filesize
184KB

Download
memory/3696-121-0x0000000000000000-mapping.dmp

Download
memory/3696-125-0x00000000043E0000-0x0000000004700000-memory.dmp

Filesize
3.1MB

Download
memory/3696-126-0x0000000000E60000-0x0000000000EF3000-memory.dmp

Filesize
588KB

Download