formbook | 470f69dc7b80ae3158420bd7b54fdda944a02fa15c4236686d5f81b5f72966d8

Analysis

max time kernel
149s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-12-2024 18:49

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General

Target

formbook.exe
Size

181KB
MD5

ab063fa349f25116b15276ad1e2251d7
SHA1

ddcdf4314f2c187d04a066380d97959e62c34dbd
SHA256

dc769e89feccc886334377b01f29dfe4b36c3266c2df8c88ca704919d0b1b938
SHA512

98abbe10c466b8798093963a479fd8bffcc8027feb2be361a092a98ea32f4960a1dc0e14bbd606752db3950fdb84b17763c81db6911390c88c91fbbacb56687c
SSDEEP

3072:/qpUoiXhkew9hCgu9gbxNkqqh7vIu+fiL2+TLmym/yyA2jh:Dxtw6gOuxaqqh7+aKsCymqHwh

Score

10^/10

formbook zvf discovery persistence rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

zvf

Decoy

slimytrout.com

ericdykema.com

pennystanwayart.com

auliawijayadecor.com

iyundun.com

postforearn.com

xn--4dbaigbvbe5b1a.net

fishhousemarketandgrill.com

cqweb8.com

serverauthcheckmate.com

betterulasy.com

karenhoverrealtor.com

etigia.com

yinggehong.com

brandprtex.net

pusatcpanel.com

reidec.com

ajscghy.com

tvdajiang6.com

freightlogins.com

Signatures

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

Formbook payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/4868-2-0x0000000000650000-0x000000000067E000-memory.dmp	formbook

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ZRH47 = "C:\\Program Files (x86)\\Bsv1ld08x\\helpkdj4anlx.exe"	raserver.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4868 set thread context of 3528	4868	formbook.exe	56
PID 5044 set thread context of 3528	5044	raserver.exe	56

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Bsv1ld08x\helpkdj4anlx.exe	raserver.exe

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	formbook.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	raserver.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	raserver.exe

Suspicious behavior: EnumeratesProcesses 60 IoCs

pid	Process
4868	formbook.exe
4868	formbook.exe
4868	formbook.exe
4868	formbook.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
4868	formbook.exe
4868	formbook.exe
4868	formbook.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe
5044	raserver.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4868	formbook.exe
Token: SeDebugPrivilege	5044	raserver.exe
Token: SeShutdownPrivilege	3528	Explorer.EXE
Token: SeCreatePagefilePrivilege	3528	Explorer.EXE
Token: SeShutdownPrivilege	3528	Explorer.EXE
Token: SeCreatePagefilePrivilege	3528	Explorer.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3528 wrote to memory of 5044	3528	Explorer.EXE	85
PID 3528 wrote to memory of 5044	3528	Explorer.EXE	85
PID 3528 wrote to memory of 5044	3528	Explorer.EXE	85
PID 5044 wrote to memory of 4436	5044	raserver.exe	87
PID 5044 wrote to memory of 4436	5044	raserver.exe	87
PID 5044 wrote to memory of 4436	5044	raserver.exe	87
PID 5044 wrote to memory of 2624	5044	raserver.exe	103
PID 5044 wrote to memory of 2624	5044	raserver.exe	103
PID 5044 wrote to memory of 2624	5044	raserver.exe	103
PID 5044 wrote to memory of 3756	5044	raserver.exe	105
PID 5044 wrote to memory of 3756	5044	raserver.exe	105
PID 5044 wrote to memory of 3756	5044	raserver.exe	105

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3528
- C:\Users\Admin\AppData\Local\Temp\formbook.exe
  "C:\Users\Admin\AppData\Local\Temp\formbook.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  PID:4868
- C:\Windows\SysWOW64\raserver.exe
  "C:\Windows\SysWOW64\raserver.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5044
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\formbook.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4436
- - C:\Windows\SysWOW64\cmd.exe
    /c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2624
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:3756

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\DB1

Filesize
40KB

MD5
a182561a527f929489bf4b8f74f65cd7

SHA1
8cd6866594759711ea1836e86a5b7ca64ee8911f

SHA256
42aad7886965428a941508b776a666a4450eb658cb90e80fae1e7457fc71f914

SHA512
9bc3bf5a82f6f057e873adebd5b7a4c64adef966537ab9c565fe7c4bb3582e2e485ff993d5ab8a6002363231958fabd0933b48811371b8c155eaa74592b66558

Download Submit
C:\Users\Admin\AppData\Roaming\61PPB-T3\61Plogim.jpeg

Filesize
78KB

MD5
e8089a5f8237678739a36a30bb2838db

SHA1
84f1e15879a90e8bdd204613ed8e06a6edbce460

SHA256
d0de733ad4a9399716bcb6947aa67fd5f725315fe3324f5d4aaf061c61626da0

SHA512
13afb5903e1540eb7fceedad6b2fa585afda95e1e2bf07b3af57b8e6c4d0893110da28d34c3e72fa795d03f745a9bb83e0594bb06501c74db4ef8168ebb8de92

Download Submit
C:\Users\Admin\AppData\Roaming\61PPB-T3\61Plogrf.ini

Filesize
40B

MD5
2f245469795b865bdd1b956c23d7893d

SHA1
6ad80b974d3808f5a20ea1e766c7d2f88b9e5895

SHA256
1662d01a2d47b875a34fc7a8cd92e78cb2ba7f34023c7fd2639cbb10b8d94361

SHA512
909f189846a5d2db208a5eb2e7cb3042c0f164caf437e2b1b6de608c0a70e4f3510b81b85753dbeec1e211e6a83e6ea8c96aff896e9b6e8ed42014473a54dc4f

Download Submit
C:\Users\Admin\AppData\Roaming\61PPB-T3\61Plogrg.ini

Filesize
38B

MD5
4aadf49fed30e4c9b3fe4a3dd6445ebe

SHA1
1e332822167c6f351b99615eada2c30a538ff037

SHA256
75034beb7bded9aeab5748f4592b9e1419256caec474065d43e531ec5cc21c56

SHA512
eb5b3908d5e7b43ba02165e092f05578f45f15a148b4c3769036aa542c23a0f7cd2bc2770cf4119a7e437de3f681d9e398511f69f66824c516d9b451bb95f945

Download Submit
C:\Users\Admin\AppData\Roaming\61PPB-T3\61Plogri.ini

Filesize
40B

MD5
d63a82e5d81e02e399090af26db0b9cb

SHA1
91d0014c8f54743bba141fd60c9d963f869d76c9

SHA256
eaece2eba6310253249603033c744dd5914089b0bb26bde6685ec9813611baae

SHA512
38afb05016d8f3c69d246321573997aaac8a51c34e61749a02bf5e8b2b56b94d9544d65801511044e1495906a86dc2100f2e20ff4fcbed09e01904cc780fdbad

Download Submit
C:\Users\Admin\AppData\Roaming\61PPB-T3\61Plogrv.ini

Filesize
872B

MD5
bbc41c78bae6c71e63cb544a6a284d94

SHA1
33f2c1d9fa0e9c99b80bc2500621e95af38b1f9a

SHA256
ee83c6bcea9353c74bfc0a7e739f3c4a765ace894470e09cdcdebba700b8d4cb

SHA512
0aea424b57adae3e14ad6491cab585f554b4dffe601b5a17bad6ee6177d2f0f995e419cde576e2d1782b9bddc0661aada11a2c9f1454ae625d9e3223635ec9f4

Download Submit
memory/3528-3-0x0000000008980000-0x0000000008AFC000-memory.dmp

Filesize
1.5MB

Download
memory/3528-9-0x00000000073F0000-0x00000000074CE000-memory.dmp

Filesize
888KB

Download
memory/3528-10-0x00000000073F0000-0x00000000074CE000-memory.dmp

Filesize
888KB

Download
memory/3528-7-0x0000000008980000-0x0000000008AFC000-memory.dmp

Filesize
1.5MB

Download
memory/4868-0-0x0000000000D10000-0x000000000105A000-memory.dmp

Filesize
3.3MB

Download
memory/4868-1-0x000000000066E000-0x000000000066F000-memory.dmp

Filesize
4KB

Download
memory/4868-2-0x0000000000650000-0x000000000067E000-memory.dmp

Filesize
184KB

Download
memory/5044-6-0x00000000005B0000-0x00000000005CF000-memory.dmp

Filesize
124KB

Download
memory/5044-4-0x00000000005B0000-0x00000000005CF000-memory.dmp

Filesize
124KB

Download