formbook | c90168203989a5d0e8a10cbb0753d83efad01793b94fd6480701059df2529d4f

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
29-05-2024 22:32

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General

Target

822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
Size

14KB
MD5

822bfd7e6b9a02844e5b52fdc971bcdd
SHA1

a66315e4bc32830158549601eb8c02d89e616bad
SHA256

c90168203989a5d0e8a10cbb0753d83efad01793b94fd6480701059df2529d4f
SHA512

8b3d33b04f09388e9e7ca8b4c5138249e109780e318f002ef87b8f36ab9d441a85bf6270b2885d33dfe93bde8f027512311871aedbea9e738544faf162e50b7f
SSDEEP

192:W1UugtKtPRaEdxKYRrRbZxh+F1lZ48CAZ8Ll6t+6PzKrd0As+2Dnznz3s34rbxgp:WZhRMF1DHOUrK5z6XI4r1gIG

Score

10^/10

formbook ysl persistence rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

ysl

Decoy

descansosnm.com

ciastaniespodzianka.store

jeeugae.com

cleanfunnies.com

gaywelove.com

setecandeeiroscaja.com

lacafe.rest

fuyujen.com

hit-community.com

docusharego.com

urquell-energie-code.com

pattycordeiro.com

40momentive.com

hydrogengascars.com

focusdekalb.com

sandiegorealestate.report

agence-comy.com

wgtseguros.com

bajajloangroup.com

securefedegestion.com

Signatures

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

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\Temp\\822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe\""	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe

Formbook payload 2 IoCs

rat

resource	yara_rule
behavioral2/memory/4224-8-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/4224-11-0x0000000000400000-0x000000000042F000-memory.dmp	formbook

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe

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-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe"	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
21	pastebin.com
20	pastebin.com

Suspicious use of NtSetInformationThreadHideFromDebugger 14 IoCs

pid	Process
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3168 set thread context of 4224	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	97
PID 4224 set thread context of 3436	4224	installutil.exe	55
PID 3388 set thread context of 3436	3388	wlanext.exe	55

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1268	3168	WerFault.exe	82

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4748	timeout.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
4224	installutil.exe
4224	installutil.exe
4224	installutil.exe
4224	installutil.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe
3388	wlanext.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
4224	installutil.exe
4224	installutil.exe
4224	installutil.exe
3388	wlanext.exe
3388	wlanext.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
Token: SeDebugPrivilege	4224	installutil.exe
Token: SeShutdownPrivilege	3436	Explorer.EXE
Token: SeCreatePagefilePrivilege	3436	Explorer.EXE
Token: SeDebugPrivilege	3388	wlanext.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
3436	Explorer.EXE

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 3168 wrote to memory of 4748	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	83
PID 3168 wrote to memory of 4748	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	83
PID 3168 wrote to memory of 4748	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	83
PID 3168 wrote to memory of 560	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	94
PID 3168 wrote to memory of 560	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	94
PID 3168 wrote to memory of 560	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	94
PID 3168 wrote to memory of 4936	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	95
PID 3168 wrote to memory of 4936	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	95
PID 3168 wrote to memory of 4936	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	95
PID 3168 wrote to memory of 2108	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	96
PID 3168 wrote to memory of 2108	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	96
PID 3168 wrote to memory of 2108	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	96
PID 3168 wrote to memory of 4224	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	97
PID 3168 wrote to memory of 4224	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	97
PID 3168 wrote to memory of 4224	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	97
PID 3168 wrote to memory of 4224	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	97
PID 3168 wrote to memory of 4224	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	97
PID 3168 wrote to memory of 4224	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	97
PID 3168 wrote to memory of 4224	3168	822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe	97
PID 3436 wrote to memory of 3388	3436	Explorer.EXE	100
PID 3436 wrote to memory of 3388	3436	Explorer.EXE	100
PID 3436 wrote to memory of 3388	3436	Explorer.EXE	100
PID 3388 wrote to memory of 3700	3388	wlanext.exe	103
PID 3388 wrote to memory of 3700	3388	wlanext.exe	103
PID 3388 wrote to memory of 3700	3388	wlanext.exe	103

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3436
- C:\Users\Admin\AppData\Local\Temp\822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\822bfd7e6b9a02844e5b52fdc971bcdd_JaffaCakes118.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Drops startup file
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3168
- - C:\Windows\SysWOW64\timeout.exe
    timeout 4
    3⤵
    - Delays execution with timeout.exe
    PID:4748
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe"
    3⤵
    PID:560
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe"
    3⤵
    PID:4936
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe"
    3⤵
    PID:2108
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:4224
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3168 -s 1836
    3⤵
    - Program crash
    PID:1268
- C:\Windows\SysWOW64\wlanext.exe
  "C:\Windows\SysWOW64\wlanext.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3388
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe"
    3⤵
    PID:3700

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 3168 -ip 3168
1⤵
PID:4992

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3168-14-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/3168-2-0x0000000005400000-0x000000000549C000-memory.dmp

Filesize
624KB

Download
memory/3168-1-0x0000000000A80000-0x0000000000A8A000-memory.dmp

Filesize
40KB

Download
memory/3168-3-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/3168-4-0x0000000005FA0000-0x0000000005FF4000-memory.dmp

Filesize
336KB

Download
memory/3168-5-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/3168-6-0x00000000065A0000-0x0000000006B44000-memory.dmp

Filesize
5.6MB

Download
memory/3168-0-0x00000000746DE000-0x00000000746DF000-memory.dmp

Filesize
4KB

Download
memory/3388-17-0x0000000000940000-0x0000000000957000-memory.dmp

Filesize
92KB

Download
memory/3388-15-0x0000000000940000-0x0000000000957000-memory.dmp

Filesize
92KB

Download
memory/3436-26-0x000000000B140000-0x000000000B275000-memory.dmp

Filesize
1.2MB

Download
memory/3436-13-0x000000000AFE0000-0x000000000B138000-memory.dmp

Filesize
1.3MB

Download
memory/3436-19-0x000000000AFE0000-0x000000000B138000-memory.dmp

Filesize
1.3MB

Download
memory/3436-22-0x000000000B140000-0x000000000B275000-memory.dmp

Filesize
1.2MB

Download
memory/3436-23-0x000000000B140000-0x000000000B275000-memory.dmp

Filesize
1.2MB

Download
memory/4224-11-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/4224-8-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/4224-9-0x0000000001440000-0x000000000178A000-memory.dmp

Filesize
3.3MB

Download
memory/4224-12-0x0000000000FA0000-0x0000000000FB4000-memory.dmp

Filesize
80KB

Download