formbook | 17b09e76a4a37473539460fb04c0443a9b86bc2a26f06c2512fb11fbccbd937e

General

Target

c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe
Size

822KB
MD5

c35b8d27f7ed050e3bc31e536a0e389f
SHA1

be9dddd5fac8482212030b5f6cbb04f1190a6113
SHA256

c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e
SHA512

cd012d1563cd6f35444aa3a6954de8946e463a793af33a5711f7d08f00ed3fd225e6a67bcccf517aac582d99520909be7e645a385c181f5f6b38f72165ac5a01
SSDEEP

24576:TbZZMwO7ATyN3Og9QBHbel3qs5M8Q6W3C:T0l78zp8RQ

Score

10^/10

formbook vy44 discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

vy44

Decoy

csdvehgry45y.com

letstayhome.com

davidfrechen.com

atticusandjules.com

meandbond.com

paar-fotoshooting.com

twboosterhq.com

shivamehandiarts.com

typhoonlogistics.net

vintagevowswedding.com

brittanymays.com

dreamylineart.com

vimspaces.com

thakurmosai.com

88-wealth.com

betsycousins.com

nationalcsno.online

mobileblockchainsolution.com

flymetothemundo.com

shopsuplementos.site

Signatures

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

Formbook payload 3 IoCs

rat

resource	yara_rule
behavioral2/memory/5036-13-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/5036-18-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/2772-24-0x0000000000690000-0x00000000006BF000-memory.dmp	formbook

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1312 set thread context of 5036	1312	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	101
PID 5036 set thread context of 3444	5036	vbc.exe	55
PID 2772 set thread context of 3444	2772	wlanext.exe	55

System Location Discovery: System Language Discovery 1 TTPs 3 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wlanext.exe

Suspicious behavior: EnumeratesProcesses 50 IoCs

pid	Process
1312	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe
1312	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe
5036	vbc.exe
5036	vbc.exe
5036	vbc.exe
5036	vbc.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe
2772	wlanext.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
5036	vbc.exe
5036	vbc.exe
5036	vbc.exe
2772	wlanext.exe
2772	wlanext.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1312	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe
Token: SeDebugPrivilege	5036	vbc.exe
Token: SeDebugPrivilege	2772	wlanext.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1312 wrote to memory of 4772	1312	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	100
PID 1312 wrote to memory of 4772	1312	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	100
PID 1312 wrote to memory of 4772	1312	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	100
PID 1312 wrote to memory of 5036	1312	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	101
PID 1312 wrote to memory of 5036	1312	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	101
PID 1312 wrote to memory of 5036	1312	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	101
PID 1312 wrote to memory of 5036	1312	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	101
PID 1312 wrote to memory of 5036	1312	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	101
PID 1312 wrote to memory of 5036	1312	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	101
PID 3444 wrote to memory of 2772	3444	Explorer.EXE	102
PID 3444 wrote to memory of 2772	3444	Explorer.EXE	102
PID 3444 wrote to memory of 2772	3444	Explorer.EXE	102
PID 2772 wrote to memory of 924	2772	wlanext.exe	103
PID 2772 wrote to memory of 924	2772	wlanext.exe	103
PID 2772 wrote to memory of 924	2772	wlanext.exe	103

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:3444
- C:\Users\Admin\AppData\Local\Temp\c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe
  "C:\Users\Admin\AppData\Local\Temp\c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1312
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
    3⤵
    PID:4772
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:5036
- C:\Windows\SysWOW64\wlanext.exe
  "C:\Windows\SysWOW64\wlanext.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2772
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:924

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1312-12-0x0000000008C20000-0x0000000008C54000-memory.dmp

Filesize
208KB

Download
memory/1312-2-0x0000000004CA0000-0x0000000004CC2000-memory.dmp

Filesize
136KB

Download
memory/1312-0-0x0000000074D1E000-0x0000000074D1F000-memory.dmp

Filesize
4KB

Download
memory/1312-15-0x0000000074D10000-0x00000000754C0000-memory.dmp

Filesize
7.7MB

Download
memory/1312-4-0x0000000004E20000-0x0000000004EB2000-memory.dmp

Filesize
584KB

Download
memory/1312-5-0x0000000074D10000-0x00000000754C0000-memory.dmp

Filesize
7.7MB

Download
memory/1312-6-0x0000000004DC0000-0x0000000004DCA000-memory.dmp

Filesize
40KB

Download
memory/1312-7-0x0000000005110000-0x000000000511E000-memory.dmp

Filesize
56KB

Download
memory/1312-8-0x0000000074D1E000-0x0000000074D1F000-memory.dmp

Filesize
4KB

Download
memory/1312-9-0x0000000074D10000-0x00000000754C0000-memory.dmp

Filesize
7.7MB

Download
memory/1312-10-0x0000000006360000-0x00000000063FC000-memory.dmp

Filesize
624KB

Download
memory/1312-11-0x0000000008EB0000-0x0000000008F64000-memory.dmp

Filesize
720KB

Download
memory/1312-3-0x00000000053D0000-0x0000000005974000-memory.dmp

Filesize
5.6MB

Download
memory/1312-1-0x00000000002B0000-0x0000000000386000-memory.dmp

Filesize
856KB

Download
memory/2772-21-0x0000000000650000-0x0000000000667000-memory.dmp

Filesize
92KB

Download
memory/2772-23-0x0000000000650000-0x0000000000667000-memory.dmp

Filesize
92KB

Download
memory/2772-24-0x0000000000690000-0x00000000006BF000-memory.dmp

Filesize
188KB

Download
memory/3444-32-0x0000000008890000-0x0000000008A04000-memory.dmp

Filesize
1.5MB

Download
memory/3444-20-0x0000000003040000-0x0000000003126000-memory.dmp

Filesize
920KB

Download
memory/3444-25-0x0000000003040000-0x0000000003126000-memory.dmp

Filesize
920KB

Download
memory/3444-29-0x0000000008890000-0x0000000008A04000-memory.dmp

Filesize
1.5MB

Download
memory/3444-30-0x0000000008890000-0x0000000008A04000-memory.dmp

Filesize
1.5MB

Download
memory/5036-16-0x0000000000F10000-0x000000000125A000-memory.dmp

Filesize
3.3MB

Download
memory/5036-19-0x0000000000A80000-0x0000000000A94000-memory.dmp

Filesize
80KB

Download
memory/5036-18-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/5036-13-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

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