formbook | c4147dce1e2af54d878eb35144f9350b85dd3173497e3572d4d8d4e52b89e3ab

General

Target

2.exe
Size

431KB
MD5

39f5517cde8252f68c878e5956071441
SHA1

336464c016ef58f9e82075754f200dbe59b593e4
SHA256

7cf9a8e9f9164be0f93bfb8810892a0dbaf5f7748105a8375afa3cc558f9d940
SHA512

a9f6960f08dd58cdeb5323d8f5d7e12439de61b1f83877a916596a3acb72c6e2bfdf6865da623c9c7bec2996e02446d029ce7a53e2b35484be31468b477d97a4
SSDEEP

6144:kmdYfNunWu1IA2UcaYYeAJ3NSMv4DKj1EulrsbCwOI/4WJUsJw3Gp0Xm2YcHYeQm:PDWuqUc5ohNSA4s+uGz/Li2WXm2Yo

Score

10^/10

formbook rzt discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

rzt

Decoy

travelbykeystone.com

gardenstoresupply.com

tobelias.com

thecosmicdna.com

lmshawaii.com

icorn.finance

afontoto.com

usbracesbest.com

unity-title.com

kindredanimal.com

milestonecms.com

aljazeerahlounge.com

jokcreates.com

justjazzythings.com

tiktokbestdeals.com

ww-marketing.com

humblehousekeep.com

alloreklama.com

cranecurrency.info

maraisman.com

Signatures

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

Formbook payload 2 IoCs

rat

resource	yara_rule
behavioral1/memory/3060-11-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/3060-15-0x0000000000400000-0x000000000042E000-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 2644 set thread context of 3060	2644	2.exe	30
PID 3060 set thread context of 1204	3060	vbc.exe	21
PID 2068 set thread context of 1204	2068	chkdsk.exe	21

System Location Discovery: System Language Discovery 1 TTPs 2 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	2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chkdsk.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-1846800975-3917212583-2893086201-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
3060	vbc.exe
3060	vbc.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
3060	vbc.exe
3060	vbc.exe
3060	vbc.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe
2068	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3060	vbc.exe
Token: SeDebugPrivilege	2068	chkdsk.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2644 wrote to memory of 3060	2644	2.exe	30
PID 2644 wrote to memory of 3060	2644	2.exe	30
PID 2644 wrote to memory of 3060	2644	2.exe	30
PID 2644 wrote to memory of 3060	2644	2.exe	30
PID 2644 wrote to memory of 3060	2644	2.exe	30
PID 2644 wrote to memory of 3060	2644	2.exe	30
PID 2644 wrote to memory of 3060	2644	2.exe	30
PID 1204 wrote to memory of 2068	1204	Explorer.EXE	31
PID 1204 wrote to memory of 2068	1204	Explorer.EXE	31
PID 1204 wrote to memory of 2068	1204	Explorer.EXE	31
PID 1204 wrote to memory of 2068	1204	Explorer.EXE	31
PID 2068 wrote to memory of 2104	2068	chkdsk.exe	32
PID 2068 wrote to memory of 2104	2068	chkdsk.exe	32
PID 2068 wrote to memory of 2104	2068	chkdsk.exe	32
PID 2068 wrote to memory of 2104	2068	chkdsk.exe	32
PID 2068 wrote to memory of 2104	2068	chkdsk.exe	32

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1204
- C:\Users\Admin\AppData\Local\Temp\2.exe
  "C:\Users\Admin\AppData\Local\Temp\2.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2644
- - 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:3060
- C:\Windows\SysWOW64\chkdsk.exe
  "C:\Windows\SysWOW64\chkdsk.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Enumerates system info in registry
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2068
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:2104

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

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/1204-23-0x0000000004F90000-0x0000000005070000-memory.dmp

Filesize
896KB

Download
memory/1204-17-0x0000000004F90000-0x0000000005070000-memory.dmp

Filesize
896KB

Download
memory/2068-18-0x00000000007F0000-0x00000000007F7000-memory.dmp

Filesize
28KB

Download
memory/2068-19-0x00000000007F0000-0x00000000007F7000-memory.dmp

Filesize
28KB

Download
memory/2644-3-0x00000000004E0000-0x00000000004EA000-memory.dmp

Filesize
40KB

Download
memory/2644-5-0x0000000074B80000-0x000000007526E000-memory.dmp

Filesize
6.9MB

Download
memory/2644-6-0x0000000004910000-0x0000000004966000-memory.dmp

Filesize
344KB

Download
memory/2644-7-0x0000000000D60000-0x0000000000D96000-memory.dmp

Filesize
216KB

Download
memory/2644-4-0x0000000074B8E000-0x0000000074B8F000-memory.dmp

Filesize
4KB

Download
memory/2644-2-0x0000000074B80000-0x000000007526E000-memory.dmp

Filesize
6.9MB

Download
memory/2644-0-0x0000000074B8E000-0x0000000074B8F000-memory.dmp

Filesize
4KB

Download
memory/2644-1-0x0000000000F00000-0x0000000000F72000-memory.dmp

Filesize
456KB

Download
memory/2644-12-0x0000000074B80000-0x000000007526E000-memory.dmp

Filesize
6.9MB

Download
memory/3060-11-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/3060-16-0x0000000000430000-0x0000000000444000-memory.dmp

Filesize
80KB

Download
memory/3060-15-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/3060-13-0x0000000000810000-0x0000000000B13000-memory.dmp

Filesize
3.0MB

Download
memory/3060-10-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/3060-9-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/3060-8-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download

Analysis

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