formbook | fdcd11dcd6a96d4ddfefaef7a186277e84c147fa7e33c0994b2deb384e8d0487

Analysis

max time kernel
146s
max time network
128s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25/03/2025, 20:59

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

vstdlib_s64.dll
Size

10.0MB
MD5

897e2193493cfd989d82f6a559bf1b2a
SHA1

df837bc19bf863ce466588ca3121fed884922b90
SHA256

92958c2e2d940de78a7f5352b00890f291d568816a8fe1b2bf8c572941644ec0
SHA512

761d12c8ebf7df3bbdc7cddf1220065a4e13780057c99b2e43bd653f1c00154ad9e1c8f2236373d54c985ee710c8847813223d244ad170c678593b3ce8e97996
SSDEEP

98304:nt/DDvVWLvBmmZCPPSVHxySAknm58mQzKSawKlhW1TS28kvGGp:t1WLvBzCSVHxySAknm58mHw6hKVGGp

Score

10^/10

formbook gt23 discovery persistence rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

gt23

Decoy

awkeyesunspotsunfire.top

valbardrc.store

idadari29nice.makeup

haymu.shop

hybf2025.sbs

obbiny.xyz

dlecore.xyz

rabbeat.live

irelily.vip

oahnyn.shop

om-massfadq.top

lizalyn.work

irlo.shop

hostsolver.store

ylastpics.info

adfgt.xyz

cis.club

iskol.fun

riceflashradarlab.xyz

enovhojecnhi.shop

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
behavioral5/memory/2772-30-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral5/memory/2772-34-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral5/memory/2700-39-0x0000000000080000-0x00000000000AF000-memory.dmp	formbook

Adds policy Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-312935884-697965778-3955649944-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	wininit.exe

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\L4XTIT8X7VP = "C:\\Program Files (x86)\\Windows Media Player\\wmplayer.exe"	wininit.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2228 set thread context of 2772	2228	rundll32.exe	40
PID 2772 set thread context of 1188	2772	wmplayer.exe	21
PID 2700 set thread context of 1188	2700	wininit.exe	21
PID 2700 set thread context of 2708	2700	wininit.exe	39

System Location Discovery: System Language Discovery 1 TTPs 1 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	wininit.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-312935884-697965778-3955649944-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	wininit.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
2772	wmplayer.exe
2772	wmplayer.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe

Suspicious behavior: MapViewOfSection 9 IoCs

pid	Process
2772	wmplayer.exe
2772	wmplayer.exe
2772	wmplayer.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe
2700	wininit.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2228	rundll32.exe
Token: SeDebugPrivilege	2772	wmplayer.exe
Token: SeDebugPrivilege	2700	wininit.exe

Suspicious use of WriteProcessMemory 60 IoCs

description	pid	Process	procid_target
PID 2228 wrote to memory of 2184	2228	rundll32.exe	31
PID 2228 wrote to memory of 2184	2228	rundll32.exe	31
PID 2228 wrote to memory of 2184	2228	rundll32.exe	31
PID 2228 wrote to memory of 2184	2228	rundll32.exe	31
PID 2228 wrote to memory of 2184	2228	rundll32.exe	31
PID 2228 wrote to memory of 2184	2228	rundll32.exe	31
PID 2228 wrote to memory of 2092	2228	rundll32.exe	32
PID 2228 wrote to memory of 2092	2228	rundll32.exe	32
PID 2228 wrote to memory of 2092	2228	rundll32.exe	32
PID 2228 wrote to memory of 2092	2228	rundll32.exe	32
PID 2228 wrote to memory of 2100	2228	rundll32.exe	33
PID 2228 wrote to memory of 2100	2228	rundll32.exe	33
PID 2228 wrote to memory of 2100	2228	rundll32.exe	33
PID 2228 wrote to memory of 2100	2228	rundll32.exe	33
PID 2228 wrote to memory of 2372	2228	rundll32.exe	34
PID 2228 wrote to memory of 2372	2228	rundll32.exe	34
PID 2228 wrote to memory of 2372	2228	rundll32.exe	34
PID 2228 wrote to memory of 2372	2228	rundll32.exe	34
PID 2228 wrote to memory of 2372	2228	rundll32.exe	34
PID 2228 wrote to memory of 2372	2228	rundll32.exe	34
PID 2228 wrote to memory of 376	2228	rundll32.exe	35
PID 2228 wrote to memory of 376	2228	rundll32.exe	35
PID 2228 wrote to memory of 376	2228	rundll32.exe	35
PID 2228 wrote to memory of 376	2228	rundll32.exe	35
PID 2228 wrote to memory of 3016	2228	rundll32.exe	36
PID 2228 wrote to memory of 3016	2228	rundll32.exe	36
PID 2228 wrote to memory of 3016	2228	rundll32.exe	36
PID 2228 wrote to memory of 3016	2228	rundll32.exe	36
PID 2228 wrote to memory of 3016	2228	rundll32.exe	36
PID 2228 wrote to memory of 1472	2228	rundll32.exe	37
PID 2228 wrote to memory of 1472	2228	rundll32.exe	37
PID 2228 wrote to memory of 1472	2228	rundll32.exe	37
PID 2228 wrote to memory of 1472	2228	rundll32.exe	37
PID 2228 wrote to memory of 1472	2228	rundll32.exe	37
PID 2228 wrote to memory of 1464	2228	rundll32.exe	38
PID 2228 wrote to memory of 1464	2228	rundll32.exe	38
PID 2228 wrote to memory of 1464	2228	rundll32.exe	38
PID 2228 wrote to memory of 1464	2228	rundll32.exe	38
PID 2228 wrote to memory of 1464	2228	rundll32.exe	38
PID 2228 wrote to memory of 2708	2228	rundll32.exe	39
PID 2228 wrote to memory of 2708	2228	rundll32.exe	39
PID 2228 wrote to memory of 2708	2228	rundll32.exe	39
PID 2228 wrote to memory of 2708	2228	rundll32.exe	39
PID 2228 wrote to memory of 2708	2228	rundll32.exe	39
PID 2228 wrote to memory of 2772	2228	rundll32.exe	40
PID 2228 wrote to memory of 2772	2228	rundll32.exe	40
PID 2228 wrote to memory of 2772	2228	rundll32.exe	40
PID 2228 wrote to memory of 2772	2228	rundll32.exe	40
PID 2228 wrote to memory of 2772	2228	rundll32.exe	40
PID 2228 wrote to memory of 2772	2228	rundll32.exe	40
PID 2228 wrote to memory of 2772	2228	rundll32.exe	40
PID 1188 wrote to memory of 2700	1188	Explorer.EXE	41
PID 1188 wrote to memory of 2700	1188	Explorer.EXE	41
PID 1188 wrote to memory of 2700	1188	Explorer.EXE	41
PID 1188 wrote to memory of 2700	1188	Explorer.EXE	41
PID 2700 wrote to memory of 2284	2700	wininit.exe	42
PID 2700 wrote to memory of 2284	2700	wininit.exe	42
PID 2700 wrote to memory of 2284	2700	wininit.exe	42
PID 2700 wrote to memory of 2284	2700	wininit.exe	42
PID 2700 wrote to memory of 2284	2700	wininit.exe	42

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1188
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\vstdlib_s64.dll,#1
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2228
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe"
    3⤵
    PID:2184
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
    3⤵
    PID:2092
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe"
    3⤵
    PID:2100
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
    3⤵
    PID:2372
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe"
    3⤵
    PID:376
- - C:\Windows\System32\calc.exe
    "C:\Windows\System32\calc.exe"
    3⤵
    PID:3016
- - C:\Windows\System32\svchost.exe
    "C:\Windows\System32\svchost.exe"
    3⤵
    PID:1472
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe"
    3⤵
    PID:1464
- - C:\Windows\System32\notepad.exe
    "C:\Windows\System32\notepad.exe"
    3⤵
    PID:2708
- - C:\Program Files (x86)\Windows Media Player\wmplayer.exe
    "C:\Program Files (x86)\Windows Media Player\wmplayer.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2772
- C:\Windows\SysWOW64\wininit.exe
  "C:\Windows\SysWOW64\wininit.exe"
  2⤵
  - Adds policy Run key to start application
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2700
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:2284

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1188-36-0x0000000005090000-0x0000000005231000-memory.dmp

Filesize
1.6MB

Download
memory/1188-43-0x0000000005090000-0x0000000005231000-memory.dmp

Filesize
1.6MB

Download
memory/1188-33-0x0000000003090000-0x0000000003190000-memory.dmp

Filesize
1024KB

Download
memory/2184-0-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2184-2-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2700-39-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download
memory/2700-37-0x0000000000630000-0x000000000064A000-memory.dmp

Filesize
104KB

Download
memory/2700-38-0x0000000000630000-0x000000000064A000-memory.dmp

Filesize
104KB

Download
memory/2772-28-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2772-34-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2772-35-0x0000000000110000-0x0000000000125000-memory.dmp

Filesize
84KB

Download
memory/2772-31-0x0000000000800000-0x0000000000B03000-memory.dmp

Filesize
3.0MB

Download
memory/2772-30-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download