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 4 IoCs

rat

resource	yara_rule
behavioral1/memory/2532-11-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2532-15-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2532-19-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2420-26-0x0000000000080000-0x00000000000AF000-memory.dmp	formbook

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2700 set thread context of 2532	2700	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	31
PID 2532 set thread context of 1188	2532	vbc.exe	21
PID 2532 set thread context of 1188	2532	vbc.exe	21
PID 2420 set thread context of 1188	2420	svchost.exe	21

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	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2532	vbc.exe
2532	vbc.exe
2532	vbc.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2532	vbc.exe
2532	vbc.exe
2532	vbc.exe
2532	vbc.exe
2420	svchost.exe
2420	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2532	vbc.exe
Token: SeDebugPrivilege	2420	svchost.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2700 wrote to memory of 2532	2700	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	31
PID 2700 wrote to memory of 2532	2700	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	31
PID 2700 wrote to memory of 2532	2700	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	31
PID 2700 wrote to memory of 2532	2700	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	31
PID 2700 wrote to memory of 2532	2700	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	31
PID 2700 wrote to memory of 2532	2700	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	31
PID 2700 wrote to memory of 2532	2700	c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e.exe	31
PID 1188 wrote to memory of 2420	1188	Explorer.EXE	32
PID 1188 wrote to memory of 2420	1188	Explorer.EXE	32
PID 1188 wrote to memory of 2420	1188	Explorer.EXE	32
PID 1188 wrote to memory of 2420	1188	Explorer.EXE	32
PID 2420 wrote to memory of 1416	2420	svchost.exe	33
PID 2420 wrote to memory of 1416	2420	svchost.exe	33
PID 2420 wrote to memory of 1416	2420	svchost.exe	33
PID 2420 wrote to memory of 1416	2420	svchost.exe	33

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1188
- 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 use of WriteProcessMemory
  PID:2700
- - 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:2532
- C:\Windows\SysWOW64\svchost.exe
  "C:\Windows\SysWOW64\svchost.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:2420
- - 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:1416

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/1188-22-0x0000000007940000-0x0000000007AB1000-memory.dmp

Filesize
1.4MB

Download
memory/1188-27-0x0000000007940000-0x0000000007AB1000-memory.dmp

Filesize
1.4MB

Download
memory/1188-17-0x0000000007350000-0x0000000007477000-memory.dmp

Filesize
1.2MB

Download
memory/1188-21-0x0000000007350000-0x0000000007477000-memory.dmp

Filesize
1.2MB

Download
memory/2420-26-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download
memory/2420-25-0x0000000000390000-0x0000000000398000-memory.dmp

Filesize
32KB

Download
memory/2420-23-0x0000000000390000-0x0000000000398000-memory.dmp

Filesize
32KB

Download
memory/2532-11-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2532-19-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2532-10-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2532-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2532-8-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2532-20-0x0000000000390000-0x00000000003A4000-memory.dmp

Filesize
80KB

Download
memory/2532-13-0x0000000000890000-0x0000000000B93000-memory.dmp

Filesize
3.0MB

Download
memory/2532-16-0x0000000000190000-0x00000000001A4000-memory.dmp

Filesize
80KB

Download
memory/2532-15-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2700-6-0x0000000005DD0000-0x0000000005E84000-memory.dmp

Filesize
720KB

Download
memory/2700-12-0x0000000074D30000-0x000000007541E000-memory.dmp

Filesize
6.9MB

Download
memory/2700-7-0x00000000009E0000-0x0000000000A14000-memory.dmp

Filesize
208KB

Download
memory/2700-0-0x0000000074D3E000-0x0000000074D3F000-memory.dmp

Filesize
4KB

Download
memory/2700-5-0x0000000074D30000-0x000000007541E000-memory.dmp

Filesize
6.9MB

Download
memory/2700-4-0x0000000074D3E000-0x0000000074D3F000-memory.dmp

Filesize
4KB

Download
memory/2700-3-0x0000000000470000-0x000000000047E000-memory.dmp

Filesize
56KB

Download
memory/2700-2-0x0000000074D30000-0x000000007541E000-memory.dmp

Filesize
6.9MB

Download
memory/2700-1-0x00000000013C0000-0x0000000001496000-memory.dmp

Filesize
856KB

Download

Analysis

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