formbook | 3580ae39b6b33aa67838c5c1ca91b6aebf91e470360fb13072497e85df748871

General

Target

3580ae39b6b33aa67838c5c1ca91b6aebf91e470360fb13072497e85df748871.js
Size

341KB
MD5

59b4d0fb62bea58db86b5f9b82382f21
SHA1

57bae158e509b8e23c3347efeaf00553920b8bf6
SHA256

3580ae39b6b33aa67838c5c1ca91b6aebf91e470360fb13072497e85df748871
SHA512

d09975b8ecf9de689bf7e9cebfa9430940b6f465e00a15b4baeb839c598c61cac380263db96f027ef4328b705a773c3a4543961ba1806cc31c86a2fd82f29e6e
SSDEEP

6144:D9w3fOYrR6SInG2u3Wp4cwRDyTlMiAaJ/jpPiWUiSFtroVSSM1tZQfm:YWaR6SInGj3WN6DyhMiASjpPhSFtroVI

Score

10^/10

formbook vjw0rm a24e rat spyware stealer trojan worm

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

a24e

Decoy

flormarine.co.uk

theglazingsquad.uk

konarkpharma.com

maxpropertyfinanceuk.co.uk

jackson-ifc.com

yvonneazevedoimoveis.net

baystella.com

arexbaba.online

trihgd.xyz

filth520571.com

cikpkg.cfd

jakesupport.com

8863365.com

duniaslot777.online

lop3a.com

berkut-clan.ru

lernnavigator.com

elenaisaprincess.co.uk

daimadaquan.xyz

mychirocart.net

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm

Formbook payload 4 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\BIG BRO.exe	formbook
C:\Users\Admin\AppData\Local\Temp\BIG BRO.exe	formbook
behavioral1/memory/1784-68-0x0000000000080000-0x00000000000AF000-memory.dmp	formbook
behavioral1/memory/1784-72-0x0000000000080000-0x00000000000AF000-memory.dmp	formbook

Blocklisted process makes network request 5 IoCs

Processes:

wscript.exe

flow pid process

4 936 wscript.exe
8 936 wscript.exe
11 936 wscript.exe
15 936 wscript.exe
16 936 wscript.exe
Executes dropped EXE 1 IoCs

Processes:

BIG BRO.exe

pid process

1324 BIG BRO.exe

flow	pid	process
4	936	wscript.exe
8	936	wscript.exe
11	936	wscript.exe
15	936	wscript.exe
16	936	wscript.exe

Drops startup file 2 IoCs

Processes:

wscript.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SfehVeXIsQ.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SfehVeXIsQ.js	wscript.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

BIG BRO.exeraserver.exe

description	pid	process	target process
PID 1324 set thread context of 1192	1324	BIG BRO.exe	Explorer.EXE
PID 1784 set thread context of 1192	1784	raserver.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 27 IoCs

Processes:

BIG BRO.exeraserver.exe

pid	process
1324	BIG BRO.exe
1324	BIG BRO.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe
1784	raserver.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

BIG BRO.exeraserver.exe

pid process

1324 BIG BRO.exe
1324 BIG BRO.exe
1324 BIG BRO.exe
1784 raserver.exe
1784 raserver.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

BIG BRO.exeraserver.exe

description pid process

Token: SeDebugPrivilege 1324 BIG BRO.exe
Token: SeDebugPrivilege 1784 raserver.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1192 Explorer.EXE
1192 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1192 Explorer.EXE
1192 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1324	BIG BRO.exe
Token: SeDebugPrivilege	1784	raserver.exe

pid	process
1192	Explorer.EXE
1192	Explorer.EXE

pid	process
1192	Explorer.EXE
1192	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

wscript.exeExplorer.EXEraserver.exe

description	pid	process	target process
PID 1992 wrote to memory of 936	1992	wscript.exe	wscript.exe
PID 1992 wrote to memory of 936	1992	wscript.exe	wscript.exe
PID 1992 wrote to memory of 936	1992	wscript.exe	wscript.exe
PID 1992 wrote to memory of 1324	1992	wscript.exe	BIG BRO.exe
PID 1992 wrote to memory of 1324	1992	wscript.exe	BIG BRO.exe
PID 1992 wrote to memory of 1324	1992	wscript.exe	BIG BRO.exe
PID 1992 wrote to memory of 1324	1992	wscript.exe	BIG BRO.exe
PID 1192 wrote to memory of 1784	1192	Explorer.EXE	raserver.exe
PID 1192 wrote to memory of 1784	1192	Explorer.EXE	raserver.exe
PID 1192 wrote to memory of 1784	1192	Explorer.EXE	raserver.exe
PID 1192 wrote to memory of 1784	1192	Explorer.EXE	raserver.exe
PID 1784 wrote to memory of 1348	1784	raserver.exe	cmd.exe
PID 1784 wrote to memory of 1348	1784	raserver.exe	cmd.exe
PID 1784 wrote to memory of 1348	1784	raserver.exe	cmd.exe
PID 1784 wrote to memory of 1348	1784	raserver.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1192

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\3580ae39b6b33aa67838c5c1ca91b6aebf91e470360fb13072497e85df748871.js
2⤵
- Suspicious use of WriteProcessMemory
PID:1992

C:\Windows\System32\wscript.exe
"C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\SfehVeXIsQ.js"
3⤵
- Blocklisted process makes network request
- Drops startup file
PID:936

C:\Users\Admin\AppData\Local\Temp\BIG BRO.exe
"C:\Users\Admin\AppData\Local\Temp\BIG BRO.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1324

C:\Windows\SysWOW64\raserver.exe
"C:\Windows\SysWOW64\raserver.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1784

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\BIG BRO.exe"
3⤵
PID:1348

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\BIG BRO.exe
Filesize
185KB

MD5
a20ea9350fa5aa4d9641723f3dfc1b31

SHA1
c23cf2953ea071eac81740a687473442c66e73de

SHA256
01afe1517575e1fd7f60e86702fc11a97cfc74718e520c6016eef42fa164b4ae

SHA512
296b4ace0af1f33abb8c3c0262999b07c8ad6e9a4c075959b43335992f1058865581b2c7d362dc824ed787f61dc9c62338778cd28e12add2ac34b086ca62e035

Download Submit
C:\Users\Admin\AppData\Local\Temp\BIG BRO.exe
Filesize
185KB

MD5
a20ea9350fa5aa4d9641723f3dfc1b31

SHA1
c23cf2953ea071eac81740a687473442c66e73de

SHA256
01afe1517575e1fd7f60e86702fc11a97cfc74718e520c6016eef42fa164b4ae

SHA512
296b4ace0af1f33abb8c3c0262999b07c8ad6e9a4c075959b43335992f1058865581b2c7d362dc824ed787f61dc9c62338778cd28e12add2ac34b086ca62e035

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C:\Users\Admin\AppData\Roaming\SfehVeXIsQ.js
Filesize
5KB

MD5
ef7a0bcfc54e28b9a81af747b834c898

SHA1
47f605a45958a0beab476be0ef3b97434f7b999e

SHA256
24fc05651edf06401a27a583f1dbe295881a16f9f98a04321319f3873a8569a4

SHA512
c975ac3784e346a0ed4f754177f25d256b41bd0bf707f37f0e04e3d15022db5e6d9bfbe50719b8ac483f9b7406a0a3a2782a28f279a046f61faffb863ec5da31

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memory/936-55-0x0000000000000000-mapping.dmp

Download
memory/1192-61-0x0000000004B40000-0x0000000004C30000-memory.dmp

Filesize
960KB

Download
memory/1192-73-0x0000000004C30000-0x0000000004D45000-memory.dmp

Filesize
1.1MB

Download
memory/1192-71-0x0000000004C30000-0x0000000004D45000-memory.dmp

Filesize
1.1MB

Download
memory/1324-57-0x0000000000000000-mapping.dmp

Download
memory/1324-59-0x0000000000BB0000-0x0000000000EB3000-memory.dmp

Filesize
3.0MB

Download
memory/1324-60-0x0000000000140000-0x0000000000154000-memory.dmp

Filesize
80KB

Download
memory/1348-66-0x0000000000000000-mapping.dmp

Download
memory/1784-63-0x0000000000000000-mapping.dmp

Download
memory/1784-67-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/1784-68-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download
memory/1784-69-0x0000000001FD0000-0x00000000022D3000-memory.dmp

Filesize
3.0MB

Download
memory/1784-70-0x0000000001D00000-0x0000000001D93000-memory.dmp

Filesize
588KB

Download
memory/1784-64-0x0000000076141000-0x0000000076143000-memory.dmp

Filesize
8KB

Download
memory/1784-72-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download
memory/1992-54-0x000007FEFBE81000-0x000007FEFBE83000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads