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 5 IoCs

rat

resource	yara_rule
behavioral1/files/0x000a0000000122ff-60.dat	formbook
behavioral1/files/0x000a0000000122ff-62.dat	formbook
behavioral1/files/0x000a0000000122ff-69.dat	formbook
behavioral1/memory/1300-70-0x0000000000080000-0x00000000000AF000-memory.dmp	formbook
behavioral1/memory/1300-72-0x0000000000080000-0x00000000000AF000-memory.dmp	formbook

Blocklisted process makes network request 16 IoCs

flow	pid	Process
4	1044	wscript.exe
5	1044	wscript.exe
6	1044	wscript.exe
9	1044	wscript.exe
11	1044	wscript.exe
12	1044	wscript.exe
16	1044	wscript.exe
17	1044	wscript.exe
18	1044	wscript.exe
22	1044	wscript.exe
26	1044	wscript.exe
27	1044	wscript.exe
29	1044	wscript.exe
33	1044	wscript.exe
36	1044	wscript.exe
40	1044	wscript.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
668	BIG BRO.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 668 set thread context of 1252	668	BIG BRO.exe	16
PID 1300 set thread context of 1252	1300	wininit.exe	16

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 28 IoCs

pid	Process
668	BIG BRO.exe
668	BIG BRO.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe
1300	wininit.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1252	Explorer.EXE

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
668	BIG BRO.exe
668	BIG BRO.exe
668	BIG BRO.exe
1300	wininit.exe
1300	wininit.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	668	BIG BRO.exe
Token: SeDebugPrivilege	1300	wininit.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
1252	Explorer.EXE
1252	Explorer.EXE

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
1252	Explorer.EXE
1252	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1996 wrote to memory of 1044	1996	wscript.exe	28
PID 1996 wrote to memory of 1044	1996	wscript.exe	28
PID 1996 wrote to memory of 1044	1996	wscript.exe	28
PID 1996 wrote to memory of 668	1996	wscript.exe	29
PID 1996 wrote to memory of 668	1996	wscript.exe	29
PID 1996 wrote to memory of 668	1996	wscript.exe	29
PID 1996 wrote to memory of 668	1996	wscript.exe	29
PID 1252 wrote to memory of 1300	1252	Explorer.EXE	31
PID 1252 wrote to memory of 1300	1252	Explorer.EXE	31
PID 1252 wrote to memory of 1300	1252	Explorer.EXE	31
PID 1252 wrote to memory of 1300	1252	Explorer.EXE	31
PID 1300 wrote to memory of 832	1300	wininit.exe	32
PID 1300 wrote to memory of 832	1300	wininit.exe	32
PID 1300 wrote to memory of 832	1300	wininit.exe	32
PID 1300 wrote to memory of 832	1300	wininit.exe	32

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1252
- C:\Windows\system32\wscript.exe
  wscript.exe C:\Users\Admin\AppData\Local\Temp\3580ae39b6b33aa67838c5c1ca91b6aebf91e470360fb13072497e85df748871.js
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1996
- - 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:1044
- - 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:668
- C:\Windows\SysWOW64\wininit.exe
  "C:\Windows\SysWOW64\wininit.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1300
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\BIG BRO.exe"
    3⤵
    PID:832

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

Replay Monitor

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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

Download Submit
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\Roaming\SfehVeXIsQ.js

Filesize
5KB

MD5
ef7a0bcfc54e28b9a81af747b834c898

SHA1
47f605a45958a0beab476be0ef3b97434f7b999e

SHA256
24fc05651edf06401a27a583f1dbe295881a16f9f98a04321319f3873a8569a4

SHA512
c975ac3784e346a0ed4f754177f25d256b41bd0bf707f37f0e04e3d15022db5e6d9bfbe50719b8ac483f9b7406a0a3a2782a28f279a046f61faffb863ec5da31

Download Submit
memory/668-65-0x0000000000280000-0x0000000000294000-memory.dmp

Filesize
80KB

Download
memory/668-64-0x0000000000800000-0x0000000000B03000-memory.dmp

Filesize
3.0MB

Download
memory/1252-66-0x0000000006FA0000-0x00000000070DD000-memory.dmp

Filesize
1.2MB

Download
memory/1252-75-0x0000000006400000-0x00000000064C9000-memory.dmp

Filesize
804KB

Download
memory/1252-76-0x0000000006400000-0x00000000064C9000-memory.dmp

Filesize
804KB

Download
memory/1252-79-0x0000000006400000-0x00000000064C9000-memory.dmp

Filesize
804KB

Download
memory/1300-67-0x0000000000650000-0x000000000066A000-memory.dmp

Filesize
104KB

Download
memory/1300-68-0x0000000000650000-0x000000000066A000-memory.dmp

Filesize
104KB

Download
memory/1300-70-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download
memory/1300-71-0x0000000001F20000-0x0000000002223000-memory.dmp

Filesize
3.0MB

Download
memory/1300-72-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download
memory/1300-74-0x0000000001DF0000-0x0000000001E83000-memory.dmp

Filesize
588KB

Download

Analysis

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