formbook | 15eb688bffed96b0b324724e48b258dc6c6deb76d71310b26b01e1e12f26108c

General

Target

tmp.exe
Size

342KB
MD5

7569ad8644074e28a6a9dba38e67b95a
SHA1

10e73d912b5a6955161213a5f9004988ca4030ac
SHA256

15eb688bffed96b0b324724e48b258dc6c6deb76d71310b26b01e1e12f26108c
SHA512

15fe965c6e8abeff8f9b064122be640a78ca459a45c06f0f99150f979909208ca66693fc96808dca007670a3ace96f32b375b6a591efdb10dc9d9e8b824cb3ae
SSDEEP

6144:+wN/Qnu418i2BYc5lUeE+zjevK5FV0L3Tzz6oVCVdKrLWeuJavoJ8L:+O/Au4j0Yc5lUJXveUCi/f/

Score

10^/10

formbook f4ca rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

f4ca

Decoy

QYZ6iE9Y+CsiZpCBareS0uU=

N2FQLAaH6xXE

Vc6t0MQXN+Llxsqg

ElBedmSvYGGm6yLDhHqzAtmlCxWl

4VpIWShqHR5cpjfQ4bs=

mepO9miu/iFiQQ==

Z8Owqh54IlwEpDfQ4bs=

qcq4uT5HecWZG3EVwKTiUE7slrGQGiyo

IaYYoJikKDDqgV/NigZCLA==

4Xz5pfoCCW/76NnOUrFEOw==

xiijSkVJ3Yuh9OKDcmui/d2lCxWl

cr8MmfpCEu0ULsO3p6w=

JLm2yKHo7hdVb8O3p6w=

Hriy5svWm2Qfq9mPQib9jJI65gOr

2G3nkRpidunlxsqg

gPHUAeXmi8Q9ARy3

6l5WaOf8BxhQDkp5gKQ=

KHHiXs4WOqXZdPhpaw==

+UQ5Vz5O0Ms9ARy3

pNQygKu0OziAvjOHRGLnJA==

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Blocklisted process makes network request 1 IoCs

Processes:

cmstp.exe

flow pid process

7 1720 cmstp.exe

flow	pid	process
7	1720	cmstp.exe

Drops startup file 2 IoCs

Processes:

Powershell.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\%Namee%	Powershell.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\%Namee%	Powershell.exe

Loads dropped DLL 1 IoCs

Processes:

cmstp.exe

pid process

1720 cmstp.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

pid	process
1720	cmstp.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

tmp.exeaspnet_compiler.execmstp.exe

description	pid	process	target process
PID 736 set thread context of 1484	736	tmp.exe	aspnet_compiler.exe
PID 1484 set thread context of 1416	1484	aspnet_compiler.exe	Explorer.EXE
PID 1484 set thread context of 1416	1484	aspnet_compiler.exe	Explorer.EXE
PID 1720 set thread context of 1416	1720	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

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

cmstp.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-3845472200-3839195424-595303356-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmstp.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

Processes:

aspnet_compiler.exePowershell.execmstp.exe

pid	process
1484	aspnet_compiler.exe
1484	aspnet_compiler.exe
1484	aspnet_compiler.exe
1484	aspnet_compiler.exe
936	Powershell.exe
1484	aspnet_compiler.exe
1720	cmstp.exe
1720	cmstp.exe
1720	cmstp.exe
1720	cmstp.exe
1720	cmstp.exe
1720	cmstp.exe
1720	cmstp.exe
1720	cmstp.exe
1720	cmstp.exe
1720	cmstp.exe
1720	cmstp.exe
1720	cmstp.exe
1720	cmstp.exe
1720	cmstp.exe
1720	cmstp.exe

Suspicious behavior: MapViewOfSection 8 IoCs

Processes:

aspnet_compiler.execmstp.exe

pid	process
1484	aspnet_compiler.exe
1484	aspnet_compiler.exe
1484	aspnet_compiler.exe
1484	aspnet_compiler.exe
1720	cmstp.exe
1720	cmstp.exe
1720	cmstp.exe
1720	cmstp.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

tmp.exeaspnet_compiler.exePowershell.execmstp.exe

description	pid	process
Token: SeDebugPrivilege	736	tmp.exe
Token: SeDebugPrivilege	1484	aspnet_compiler.exe
Token: SeDebugPrivilege	936	Powershell.exe
Token: SeDebugPrivilege	1720	cmstp.exe

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1416 Explorer.EXE
1416 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1416 Explorer.EXE
1416 Explorer.EXE

pid	process
1416	Explorer.EXE
1416	Explorer.EXE

pid	process
1416	Explorer.EXE
1416	Explorer.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

tmp.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 736 wrote to memory of 936	736	tmp.exe	Powershell.exe
PID 736 wrote to memory of 936	736	tmp.exe	Powershell.exe
PID 736 wrote to memory of 936	736	tmp.exe	Powershell.exe
PID 736 wrote to memory of 936	736	tmp.exe	Powershell.exe
PID 736 wrote to memory of 1484	736	tmp.exe	aspnet_compiler.exe
PID 736 wrote to memory of 1484	736	tmp.exe	aspnet_compiler.exe
PID 736 wrote to memory of 1484	736	tmp.exe	aspnet_compiler.exe
PID 736 wrote to memory of 1484	736	tmp.exe	aspnet_compiler.exe
PID 736 wrote to memory of 1484	736	tmp.exe	aspnet_compiler.exe
PID 736 wrote to memory of 1484	736	tmp.exe	aspnet_compiler.exe
PID 736 wrote to memory of 1484	736	tmp.exe	aspnet_compiler.exe
PID 1416 wrote to memory of 1720	1416	Explorer.EXE	cmstp.exe
PID 1416 wrote to memory of 1720	1416	Explorer.EXE	cmstp.exe
PID 1416 wrote to memory of 1720	1416	Explorer.EXE	cmstp.exe
PID 1416 wrote to memory of 1720	1416	Explorer.EXE	cmstp.exe
PID 1416 wrote to memory of 1720	1416	Explorer.EXE	cmstp.exe
PID 1416 wrote to memory of 1720	1416	Explorer.EXE	cmstp.exe
PID 1416 wrote to memory of 1720	1416	Explorer.EXE	cmstp.exe
PID 1720 wrote to memory of 808	1720	cmstp.exe	Firefox.exe
PID 1720 wrote to memory of 808	1720	cmstp.exe	Firefox.exe
PID 1720 wrote to memory of 808	1720	cmstp.exe	Firefox.exe
PID 1720 wrote to memory of 808	1720	cmstp.exe	Firefox.exe
PID 1720 wrote to memory of 808	1720	cmstp.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1416

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:736

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
"Powershell" Copy-Item 'C:\Users\Admin\AppData\Local\Temp\tmp.exe' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\%Namee%'
3⤵
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:936

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1484

C:\Windows\SysWOW64\cmstp.exe
"C:\Windows\SysWOW64\cmstp.exe"
2⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1720

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:808

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\sqlite3.dll
Filesize
1.0MB

MD5
f1e5f58f9eb43ecec773acbdb410b888

SHA1
f1b8076b0bbde696694bbc0ab259a77893839464

SHA256
a15fd84ee61b54c92bb099dfb78226548f43d550c67fb6adf4cce3d064ab1c14

SHA512
0aff96430dd99bb227285fefc258014c301f85216c84e40f45702d26cdd7e77261a41fd3811d686f5fb2ee363cc651a014e8ffa339384004cece645a36486456

Download Submit
memory/736-55-0x0000000000D30000-0x0000000000D7A000-memory.dmp

Filesize
296KB

Download
memory/736-56-0x0000000076201000-0x0000000076203000-memory.dmp

Filesize
8KB

Download
memory/736-58-0x0000000000650000-0x000000000066C000-memory.dmp

Filesize
112KB

Download
memory/736-54-0x0000000000D80000-0x0000000000DDA000-memory.dmp

Filesize
360KB

Download
memory/936-69-0x000000006FCB0000-0x000000007025B000-memory.dmp

Filesize
5.7MB

Download
memory/936-57-0x0000000000000000-mapping.dmp

Download
memory/1416-86-0x0000000006000000-0x00000000060E4000-memory.dmp

Filesize
912KB

Download
memory/1416-84-0x0000000006000000-0x00000000060E4000-memory.dmp

Filesize
912KB

Download
memory/1416-75-0x0000000006830000-0x0000000006953000-memory.dmp

Filesize
1.1MB

Download
memory/1416-72-0x0000000005E60000-0x0000000005FF5000-memory.dmp

Filesize
1.6MB

Download
memory/1484-71-0x00000000000F0000-0x0000000000100000-memory.dmp

Filesize
64KB

Download
memory/1484-78-0x0000000000401000-0x000000000042F000-memory.dmp

Filesize
184KB

Download
memory/1484-70-0x0000000000A20000-0x0000000000D23000-memory.dmp

Filesize
3.0MB

Download
memory/1484-67-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1484-66-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1484-74-0x00000000001B0000-0x00000000001C0000-memory.dmp

Filesize
64KB

Download
memory/1484-64-0x00000000004012B0-mapping.dmp

Download
memory/1484-60-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1484-77-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1484-68-0x0000000000401000-0x000000000042F000-memory.dmp

Filesize
184KB

Download
memory/1484-61-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1484-63-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1720-82-0x00000000020B0000-0x00000000023B3000-memory.dmp

Filesize
3.0MB

Download
memory/1720-83-0x00000000008A0000-0x000000000092F000-memory.dmp

Filesize
572KB

Download
memory/1720-81-0x0000000000090000-0x00000000000BD000-memory.dmp

Filesize
180KB

Download
memory/1720-85-0x0000000000090000-0x00000000000BD000-memory.dmp

Filesize
180KB

Download
memory/1720-80-0x0000000000C90000-0x0000000000CA8000-memory.dmp

Filesize
96KB

Download
memory/1720-76-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads