formbook | fde11e6f4e911647593850de2ddc4b747eee070999f8031101d02bf4cb2364ef

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
06-02-2023 14:33

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General

Target

fde11e6f4e911647593850de2ddc4b747eee070999f8031101d02bf4cb2364ef.exe
Size

297KB
MD5

af2b8f5ab74b832d8afdeb31bbbedf7a
SHA1

843c977f2763e00215798252df9d72e705be2049
SHA256

fde11e6f4e911647593850de2ddc4b747eee070999f8031101d02bf4cb2364ef
SHA512

d01f8c2d03e4ea2db7e4c308e45e99cdabddae25a4260d685d00c57fd515b6a011683cdb6ef9beb7ab3c5997d2aead36dbff0d0cda1dec141e95b12b0b345ce1
SSDEEP

6144:nYa6cjfjA7IUkIDhzdQoz9FDJuWYtfX5Nyu6YtSXiOJF:nYYfSxkDcuWwHdsn

Score

10^/10

formbook rs11 rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

rs11

Decoy

brigtsidefinancial.com

kotteri-mannish.com

black-iron-fences-bros.com

fnixo.com

gondes.net

cutleryknives-store.com

cabledahmercadillacvip.com

redstaing.com

cateri.africa

cgadminservices.com

wilwin.net

moteru40.net

floraandfate.com

aram-eyes.com

bcrazy55.com

courierpay.buzz

discovervielven.com

mymansshirt.com

junglesmp.online

classic-workshop.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/2160-139-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/4124-146-0x0000000000F10000-0x0000000000F3F000-memory.dmp	formbook

Executes dropped EXE 2 IoCs

Processes:

atoeyybuc.exeatoeyybuc.exe

pid process

4296 atoeyybuc.exe
2160 atoeyybuc.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
4296	atoeyybuc.exe
2160	atoeyybuc.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

atoeyybuc.exeatoeyybuc.exewlanext.exe

description	pid	process	target process
PID 4296 set thread context of 2160	4296	atoeyybuc.exe	atoeyybuc.exe
PID 2160 set thread context of 1028	2160	atoeyybuc.exe	Explorer.EXE
PID 4124 set thread context of 1028	4124	wlanext.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:

wlanext.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	wlanext.exe

Suspicious behavior: EnumeratesProcesses 58 IoCs

Processes:

atoeyybuc.exewlanext.exe

pid	process
2160	atoeyybuc.exe
2160	atoeyybuc.exe
2160	atoeyybuc.exe
2160	atoeyybuc.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1028 Explorer.EXE
Suspicious behavior: MapViewOfSection 8 IoCs

Processes:

atoeyybuc.exeatoeyybuc.exewlanext.exe

pid process

4296 atoeyybuc.exe
2160 atoeyybuc.exe
2160 atoeyybuc.exe
2160 atoeyybuc.exe
4124 wlanext.exe
4124 wlanext.exe
4124 wlanext.exe
4124 wlanext.exe

pid	process
1028	Explorer.EXE

pid	process
4296	atoeyybuc.exe
2160	atoeyybuc.exe
2160	atoeyybuc.exe
2160	atoeyybuc.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe
4124	wlanext.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

atoeyybuc.exewlanext.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	2160	atoeyybuc.exe
Token: SeDebugPrivilege	4124	wlanext.exe
Token: SeShutdownPrivilege	1028	Explorer.EXE
Token: SeCreatePagefilePrivilege	1028	Explorer.EXE
Token: SeShutdownPrivilege	1028	Explorer.EXE
Token: SeCreatePagefilePrivilege	1028	Explorer.EXE

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

fde11e6f4e911647593850de2ddc4b747eee070999f8031101d02bf4cb2364ef.exeatoeyybuc.exeExplorer.EXEwlanext.exe

description	pid	process	target process
PID 4092 wrote to memory of 4296	4092	fde11e6f4e911647593850de2ddc4b747eee070999f8031101d02bf4cb2364ef.exe	atoeyybuc.exe
PID 4092 wrote to memory of 4296	4092	fde11e6f4e911647593850de2ddc4b747eee070999f8031101d02bf4cb2364ef.exe	atoeyybuc.exe
PID 4092 wrote to memory of 4296	4092	fde11e6f4e911647593850de2ddc4b747eee070999f8031101d02bf4cb2364ef.exe	atoeyybuc.exe
PID 4296 wrote to memory of 2160	4296	atoeyybuc.exe	atoeyybuc.exe
PID 4296 wrote to memory of 2160	4296	atoeyybuc.exe	atoeyybuc.exe
PID 4296 wrote to memory of 2160	4296	atoeyybuc.exe	atoeyybuc.exe
PID 4296 wrote to memory of 2160	4296	atoeyybuc.exe	atoeyybuc.exe
PID 1028 wrote to memory of 4124	1028	Explorer.EXE	wlanext.exe
PID 1028 wrote to memory of 4124	1028	Explorer.EXE	wlanext.exe
PID 1028 wrote to memory of 4124	1028	Explorer.EXE	wlanext.exe
PID 4124 wrote to memory of 4928	4124	wlanext.exe	cmd.exe
PID 4124 wrote to memory of 4928	4124	wlanext.exe	cmd.exe
PID 4124 wrote to memory of 4928	4124	wlanext.exe	cmd.exe
PID 4124 wrote to memory of 3852	4124	wlanext.exe	Firefox.exe
PID 4124 wrote to memory of 3852	4124	wlanext.exe	Firefox.exe
PID 4124 wrote to memory of 3852	4124	wlanext.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1028

C:\Users\Admin\AppData\Local\Temp\fde11e6f4e911647593850de2ddc4b747eee070999f8031101d02bf4cb2364ef.exe
"C:\Users\Admin\AppData\Local\Temp\fde11e6f4e911647593850de2ddc4b747eee070999f8031101d02bf4cb2364ef.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:4092

C:\Users\Admin\AppData\Local\Temp\atoeyybuc.exe
"C:\Users\Admin\AppData\Local\Temp\atoeyybuc.exe" C:\Users\Admin\AppData\Local\Temp\xepdzguyi.zpq
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4296

C:\Users\Admin\AppData\Local\Temp\atoeyybuc.exe
"C:\Users\Admin\AppData\Local\Temp\atoeyybuc.exe"
4⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:2160

C:\Windows\SysWOW64\autoconv.exe
"C:\Windows\SysWOW64\autoconv.exe"
2⤵
PID:1436

C:\Windows\SysWOW64\wlanext.exe
"C:\Windows\SysWOW64\wlanext.exe"
2⤵
- Suspicious use of SetThreadContext
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4124

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⤵
PID:4928

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:3852

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\DB1
Filesize
40KB

MD5
b608d407fc15adea97c26936bc6f03f6

SHA1
953e7420801c76393902c0d6bb56148947e41571

SHA256
b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

SHA512
cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

Download Submit
C:\Users\Admin\AppData\Local\Temp\atoeyybuc.exe
Filesize
112KB

MD5
7ede9a999ded9de662e54cbfd90680d8

SHA1
ad00efdf39b85309b1fde0ec304f3fcd15c5f927

SHA256
d51b4fbb78f31eff83c619334cd5e1a7cb8b503a1f61d3b191007fe7062a69cb

SHA512
01a7bb1f2e81dec04cfe037b68914cecc911fde8b1a62379b6bf28cd32f9e23dcdc77ca49f7924dae33b27d42575cef3bf2dded85d2c2fcfec626a5ffbddeb6a

Download Submit
C:\Users\Admin\AppData\Local\Temp\atoeyybuc.exe
Filesize
112KB

MD5
7ede9a999ded9de662e54cbfd90680d8

SHA1
ad00efdf39b85309b1fde0ec304f3fcd15c5f927

SHA256
d51b4fbb78f31eff83c619334cd5e1a7cb8b503a1f61d3b191007fe7062a69cb

SHA512
01a7bb1f2e81dec04cfe037b68914cecc911fde8b1a62379b6bf28cd32f9e23dcdc77ca49f7924dae33b27d42575cef3bf2dded85d2c2fcfec626a5ffbddeb6a

Download Submit
C:\Users\Admin\AppData\Local\Temp\atoeyybuc.exe
Filesize
112KB

MD5
7ede9a999ded9de662e54cbfd90680d8

SHA1
ad00efdf39b85309b1fde0ec304f3fcd15c5f927

SHA256
d51b4fbb78f31eff83c619334cd5e1a7cb8b503a1f61d3b191007fe7062a69cb

SHA512
01a7bb1f2e81dec04cfe037b68914cecc911fde8b1a62379b6bf28cd32f9e23dcdc77ca49f7924dae33b27d42575cef3bf2dded85d2c2fcfec626a5ffbddeb6a

Download Submit
C:\Users\Admin\AppData\Local\Temp\kbfotrqmze.ug
Filesize
205KB

MD5
3656da71ef457ff4aa9628cf15739006

SHA1
d252fea8ae881f4bc02807e32da34fe1e8c84155

SHA256
2f74419a2cc131c46271d0f19c2235d42e08c101be938a381edda3af46aeb003

SHA512
090495799c91cbea31ab70779d61f08be4902f015f05accf91551e1901962b502bc3c53ec4a0871b69cf6d553c70f7e747aa3416d7146c3395be274d3ca56ca5

Download Submit
C:\Users\Admin\AppData\Local\Temp\xepdzguyi.zpq
Filesize
5KB

MD5
2a18b621f690f6724e332ba8dc46d39e

SHA1
b079a6cee56e6d46953b7a3fa558c96a76c98954

SHA256
ad1b6b65ae61388f101d313e46c232cdfa5e4b4c278b1d966681c2540ad67018

SHA512
fc06a8bc96135125ffd26617dafd6d893f23eb5519f6e4a266ca671921efdab86e5aab1fd573ddef0fb6013df87be351cc42b12f07c40dfc156e3974fe2c5fa2

Download Submit
C:\Users\Admin\AppData\Roaming\96709-4S\967logim.jpeg
Filesize
79KB

MD5
03503911d22a2f6b87ecc6acd7d0f9a9

SHA1
a55c025edb5096f8c86d617ea0e735c48c4794bb

SHA256
1c90b7ac48263ab63aedfe05936994afe4b99a9ea7c673b8522032980b323b59

SHA512
8213e1711829da17b38fea48e1722027c911eb576cd667d1262e0fdbbb65b03143d3e3f6b1ea70889fc5c08696d952b1725a298d62a6d25ce5b9cc443f708bd5

Download Submit
C:\Users\Admin\AppData\Roaming\96709-4S\967logrf.ini
Filesize
40B

MD5
2f245469795b865bdd1b956c23d7893d

SHA1
6ad80b974d3808f5a20ea1e766c7d2f88b9e5895

SHA256
1662d01a2d47b875a34fc7a8cd92e78cb2ba7f34023c7fd2639cbb10b8d94361

SHA512
909f189846a5d2db208a5eb2e7cb3042c0f164caf437e2b1b6de608c0a70e4f3510b81b85753dbeec1e211e6a83e6ea8c96aff896e9b6e8ed42014473a54dc4f

Download Submit
C:\Users\Admin\AppData\Roaming\96709-4S\967logrg.ini
Filesize
38B

MD5
4aadf49fed30e4c9b3fe4a3dd6445ebe

SHA1
1e332822167c6f351b99615eada2c30a538ff037

SHA256
75034beb7bded9aeab5748f4592b9e1419256caec474065d43e531ec5cc21c56

SHA512
eb5b3908d5e7b43ba02165e092f05578f45f15a148b4c3769036aa542c23a0f7cd2bc2770cf4119a7e437de3f681d9e398511f69f66824c516d9b451bb95f945

Download Submit
C:\Users\Admin\AppData\Roaming\96709-4S\967logri.ini
Filesize
40B

MD5
d63a82e5d81e02e399090af26db0b9cb

SHA1
91d0014c8f54743bba141fd60c9d963f869d76c9

SHA256
eaece2eba6310253249603033c744dd5914089b0bb26bde6685ec9813611baae

SHA512
38afb05016d8f3c69d246321573997aaac8a51c34e61749a02bf5e8b2b56b94d9544d65801511044e1495906a86dc2100f2e20ff4fcbed09e01904cc780fdbad

Download Submit
C:\Users\Admin\AppData\Roaming\96709-4S\967logrv.ini
Filesize
872B

MD5
bbc41c78bae6c71e63cb544a6a284d94

SHA1
33f2c1d9fa0e9c99b80bc2500621e95af38b1f9a

SHA256
ee83c6bcea9353c74bfc0a7e739f3c4a765ace894470e09cdcdebba700b8d4cb

SHA512
0aea424b57adae3e14ad6491cab585f554b4dffe601b5a17bad6ee6177d2f0f995e419cde576e2d1782b9bddc0661aada11a2c9f1454ae625d9e3223635ec9f4

Download Submit
memory/1028-150-0x0000000002740000-0x0000000002818000-memory.dmp

Filesize
864KB

Download
memory/1028-151-0x0000000002740000-0x0000000002818000-memory.dmp

Filesize
864KB

Download
memory/1028-142-0x00000000080E0000-0x0000000008239000-memory.dmp

Filesize
1.3MB

Download
memory/2160-139-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2160-137-0x0000000000000000-mapping.dmp

Download
memory/2160-141-0x00000000008D0000-0x00000000008E4000-memory.dmp

Filesize
80KB

Download
memory/2160-140-0x0000000000990000-0x0000000000CDA000-memory.dmp

Filesize
3.3MB

Download
memory/4124-145-0x0000000001870000-0x0000000001BBA000-memory.dmp

Filesize
3.3MB

Download
memory/4124-146-0x0000000000F10000-0x0000000000F3F000-memory.dmp

Filesize
188KB

Download
memory/4124-143-0x0000000000000000-mapping.dmp

Download
memory/4124-149-0x00000000016A0000-0x0000000001733000-memory.dmp

Filesize
588KB

Download
memory/4124-144-0x0000000000A80000-0x0000000000A97000-memory.dmp

Filesize
92KB

Download
memory/4296-132-0x0000000000000000-mapping.dmp

Download
memory/4928-147-0x0000000000000000-mapping.dmp

Download