formbook | 55fda8fe5169419bcbdfa68e712b378085ddd86638e0f84e50e6b6f43cf19334

General

Target

file.exe
Size

178KB
MD5

269b3771f557dd8baf50335ab7165d81
SHA1

339394ee3109c21c6ee55b4aea36a8ac4c8444a7
SHA256

55fda8fe5169419bcbdfa68e712b378085ddd86638e0f84e50e6b6f43cf19334
SHA512

739abb3c8b81cde39fb1c10da9e911b27b9022ff326775f74f5cfb7912000be8062d50030b5824bba301f97356d877f3435954e9349a4fae9ba167376089d207

Score

10^/10

spyware evasion trojan stealer formbook persistence

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
792	cmd.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

Data from Local System
T1005

Credentials in Files
T1081

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
1496	file.exe
1496	file.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe

Suspicious use of FindShellTrayWindow 5 IoCs

pid	Process
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Explorer.EXE

Adds Run entry to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\Machine\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	wlanext.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\8P-TYX0PFZ = "C:\\Program Files (x86)\\Flf9l_rn\\systrayabc.exe"	wlanext.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1496 set thread context of 1228	1496	file.exe	20
PID 240 set thread context of 1228	240	wlanext.exe	20

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

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Flf9l_rn\systrayabc.exe	wlanext.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1496	file.exe
Token: SeDebugPrivilege	240	wlanext.exe
Token: SeShutdownPrivilege	1228	Explorer.EXE

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
1496	file.exe
1496	file.exe
1496	file.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe
240	wlanext.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1228 wrote to memory of 240	1228	Explorer.EXE	24
PID 1228 wrote to memory of 240	1228	Explorer.EXE	24
PID 1228 wrote to memory of 240	1228	Explorer.EXE	24
PID 1228 wrote to memory of 240	1228	Explorer.EXE	24
PID 240 wrote to memory of 792	240	wlanext.exe	25
PID 240 wrote to memory of 792	240	wlanext.exe	25
PID 240 wrote to memory of 792	240	wlanext.exe	25
PID 240 wrote to memory of 792	240	wlanext.exe	25
PID 240 wrote to memory of 1940	240	wlanext.exe	30
PID 240 wrote to memory of 1940	240	wlanext.exe	30
PID 240 wrote to memory of 1940	240	wlanext.exe	30
PID 240 wrote to memory of 1940	240	wlanext.exe	30
PID 240 wrote to memory of 1940	240	wlanext.exe	30

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-1131729243-447456001-3632642222-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	wlanext.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of SendNotifyMessage
- Suspicious use of FindShellTrayWindow
- Checks whether UAC is enabled
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1228
- C:\Users\Admin\AppData\Local\Temp\file.exe
  "C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious behavior: MapViewOfSection
  PID:1496
- C:\Windows\SysWOW64\wlanext.exe
  "C:\Windows\SysWOW64\wlanext.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Adds Run entry to start application
  - Suspicious use of SetThreadContext
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  - Modifies Internet Explorer settings
  PID:240
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\file.exe"
    3⤵
    - Deletes itself
    PID:792
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:1940

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/240-1-0x00000000004B0000-0x00000000004C6000-memory.dmp

Filesize
88KB

Download
memory/240-3-0x0000000002EC0000-0x0000000003053000-memory.dmp

Filesize
1.6MB

Download
memory/240-4-0x0000000074EA0000-0x0000000074FFC000-memory.dmp

Filesize
1.4MB

Download
memory/240-5-0x00000000039A0000-0x0000000003AAE000-memory.dmp

Filesize
1.1MB

Download
memory/1940-7-0x000000013FA90000-0x000000013FB23000-memory.dmp

Filesize
588KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads