formbook | 7369dcfec21741f712f75662e29752b6a55fcacd1fbf76b9948d40b82e89b9a0

General

Target

Ekstre.exe
Size

499KB
MD5

fe599cbeeae671dd2e7684bd0cce9289
SHA1

3b06b72d997fb3154d946e4f43b2e03977e96a92
SHA256

7369dcfec21741f712f75662e29752b6a55fcacd1fbf76b9948d40b82e89b9a0
SHA512

a34118abba227266ecbcdffcc3c77701efcb1be6b67a2a6f1b770f7d253cfb5868f0309d4ee28ff7596f5bcd41b0502a8df8fda080633bf8bbae417639334d22

Score

10^/10

persistence spyware trojan stealer formbook

Malware Config

Signatures

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Ekstre.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Ekstre.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Ekstre.exe

Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

Ekstre.exe

description ioc process

Key opened \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Oracle\VirtualBox Guest Additions Ekstre.exe
Looks for VMWare Tools registry key 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

Ekstre.exe

description ioc process

Key opened \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\VMware, Inc.\VMware Tools Ekstre.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Oracle\VirtualBox Guest Additions	Ekstre.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\VMware, Inc.\VMware Tools	Ekstre.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

Ekstre.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	Ekstre.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	Ekstre.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

Processes:

Ekstre.exeEkstre.exemsiexec.exe

pid	process
1296	Ekstre.exe
1296	Ekstre.exe
1296	Ekstre.exe
1772	Ekstre.exe
1772	Ekstre.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe

Adds Run entry to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

msiexec.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	msiexec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\8PTXHFWXGV = "C:\\Program Files (x86)\\L8ptdb08\\autochk2d3.exe"	msiexec.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
Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

msiexec.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-910373003-3952921535-3480519689-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	msiexec.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

Ekstre.exeEkstre.exemsiexec.exe

description	pid	process	target process
PID 1296 set thread context of 1772	1296	Ekstre.exe	Ekstre.exe
PID 1772 set thread context of 1304	1772	Ekstre.exe	Explorer.EXE
PID 760 set thread context of 1304	760	msiexec.exe	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Ekstre.exeEkstre.exemsiexec.exe

description pid process

Token: SeDebugPrivilege 1296 Ekstre.exe
Token: SeDebugPrivilege 1772 Ekstre.exe
Token: SeDebugPrivilege 760 msiexec.exe
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

Ekstre.exemsiexec.exe

pid process

1772 Ekstre.exe
1772 Ekstre.exe
1772 Ekstre.exe
760 msiexec.exe
760 msiexec.exe
760 msiexec.exe
760 msiexec.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1304 Explorer.EXE
1304 Explorer.EXE
1304 Explorer.EXE
1304 Explorer.EXE
Drops file in Program Files directory 1 IoCs

Processes:

msiexec.exe

description ioc process

File opened for modification C:\Program Files (x86)\L8ptdb08\autochk2d3.exe msiexec.exe

description	pid	process
Token: SeDebugPrivilege	1296	Ekstre.exe
Token: SeDebugPrivilege	1772	Ekstre.exe
Token: SeDebugPrivilege	760	msiexec.exe

pid	process
1772	Ekstre.exe
1772	Ekstre.exe
1772	Ekstre.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe
760	msiexec.exe

pid	process
1304	Explorer.EXE
1304	Explorer.EXE
1304	Explorer.EXE
1304	Explorer.EXE

description	ioc	process
File opened for modification	C:\Program Files (x86)\L8ptdb08\autochk2d3.exe	msiexec.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

Ekstre.exeExplorer.EXEmsiexec.exe

description	pid	process	target process
PID 1296 wrote to memory of 1792	1296	Ekstre.exe	Ekstre.exe
PID 1296 wrote to memory of 1792	1296	Ekstre.exe	Ekstre.exe
PID 1296 wrote to memory of 1792	1296	Ekstre.exe	Ekstre.exe
PID 1296 wrote to memory of 1792	1296	Ekstre.exe	Ekstre.exe
PID 1296 wrote to memory of 1772	1296	Ekstre.exe	Ekstre.exe
PID 1296 wrote to memory of 1772	1296	Ekstre.exe	Ekstre.exe
PID 1296 wrote to memory of 1772	1296	Ekstre.exe	Ekstre.exe
PID 1296 wrote to memory of 1772	1296	Ekstre.exe	Ekstre.exe
PID 1296 wrote to memory of 1772	1296	Ekstre.exe	Ekstre.exe
PID 1296 wrote to memory of 1772	1296	Ekstre.exe	Ekstre.exe
PID 1296 wrote to memory of 1772	1296	Ekstre.exe	Ekstre.exe
PID 1304 wrote to memory of 760	1304	Explorer.EXE	msiexec.exe
PID 1304 wrote to memory of 760	1304	Explorer.EXE	msiexec.exe
PID 1304 wrote to memory of 760	1304	Explorer.EXE	msiexec.exe
PID 1304 wrote to memory of 760	1304	Explorer.EXE	msiexec.exe
PID 1304 wrote to memory of 760	1304	Explorer.EXE	msiexec.exe
PID 1304 wrote to memory of 760	1304	Explorer.EXE	msiexec.exe
PID 1304 wrote to memory of 760	1304	Explorer.EXE	msiexec.exe
PID 760 wrote to memory of 1000	760	msiexec.exe	cmd.exe
PID 760 wrote to memory of 1000	760	msiexec.exe	cmd.exe
PID 760 wrote to memory of 1000	760	msiexec.exe	cmd.exe
PID 760 wrote to memory of 1000	760	msiexec.exe	cmd.exe
PID 760 wrote to memory of 1900	760	msiexec.exe	Firefox.exe
PID 760 wrote to memory of 1900	760	msiexec.exe	Firefox.exe
PID 760 wrote to memory of 1900	760	msiexec.exe	Firefox.exe
PID 760 wrote to memory of 1900	760	msiexec.exe	Firefox.exe
PID 760 wrote to memory of 1900	760	msiexec.exe	Firefox.exe

Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1304 Explorer.EXE
1304 Explorer.EXE
1304 Explorer.EXE
1304 Explorer.EXE
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1000 cmd.exe

pid	process
1304	Explorer.EXE
1304	Explorer.EXE
1304	Explorer.EXE
1304	Explorer.EXE

pid	process
1000	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
- Suspicious use of SendNotifyMessage
PID:1304

C:\Users\Admin\AppData\Local\Temp\Ekstre.exe
"C:\Users\Admin\AppData\Local\Temp\Ekstre.exe"
2⤵
- Checks BIOS information in registry
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Maps connected drives based on registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1296

C:\Users\Admin\AppData\Local\Temp\Ekstre.exe
"{path}"
3⤵
PID:1792

C:\Users\Admin\AppData\Local\Temp\Ekstre.exe
"{path}"
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: MapViewOfSection
PID:1772

C:\Windows\SysWOW64\msiexec.exe
"C:\Windows\SysWOW64\msiexec.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Adds Run entry to start application
- Modifies Internet Explorer settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: MapViewOfSection
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:760

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\Ekstre.exe"
3⤵
- Deletes itself
PID:1000

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1900

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

Peripheral Device Discovery

Query Registry

System Information Discovery

4

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\924288DA\924logim.jpeg

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C:\Users\Admin\AppData\Roaming\924288DA\924logrf.ini

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C:\Users\Admin\AppData\Roaming\924288DA\924logri.ini

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C:\Users\Admin\AppData\Roaming\924288DA\924logrv.ini

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memory/760-8-0x0000000076890000-0x000000007689C000-memory.dmp

Filesize
48KB

Download
memory/760-7-0x0000000002010000-0x0000000002115000-memory.dmp

Filesize
1.0MB

Download
memory/760-9-0x0000000074E20000-0x0000000074F3D000-memory.dmp

Filesize
1.1MB

Download
memory/760-14-0x0000000003BB0000-0x0000000003D1C000-memory.dmp

Filesize
1.4MB

Download
memory/760-5-0x0000000000820000-0x0000000000834000-memory.dmp

Filesize
80KB

Download
memory/760-4-0x0000000000000000-mapping.dmp

Download
memory/1000-6-0x0000000000000000-mapping.dmp

Download
memory/1772-2-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/1772-3-0x000000000041E2F0-mapping.dmp

Download
memory/1900-15-0x0000000000000000-mapping.dmp

Download
memory/1900-16-0x000000013F860000-0x000000013F8F3000-memory.dmp

Filesize
588KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads