formbook | 39aff459babaf4488ea90b5e81e463044d4ad3b8a17a3bfcb247725a288db025

General

Target

PO0932083943974.exe
Size

450KB
MD5

cc034757c9d872b0a95e4a67967e50ac
SHA1

607ec4ab698dffdd9b0546f3a030a88fdd6ce8b7
SHA256

0047270c26f603d132bc8e6a67894311356fe2d3c977aa287a09a8261f6b5690
SHA512

78cbacad75abf582651694af5edf2b1b479851f43bff1cefbd422943e4ebd232c54d0b00e58314760c47ccb1b9d9b433f1ff6686936091a7dd1929173e2638d8

Score

10^/10

formbook xloader b6fg evasion loader persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

xloader

Version

2.0

Campaign

b6fg

Decoy

multlockmt5.com

mohajrannoor.com

robynhoodofretail.info

belinv.com

hotellasab.com

kibrismosad.com

xn--fxwm39aeb590h.xn--io0a7i

resetbrasil.com

tcsonhvac.com

theresav.net

bohoqi.info

machinafuturae.com

mambavault.com

xn--980am9a.top

yumiang.com

evntmonitor.com

83003kk.com

triterm.com

8800pe.com

silvanstudio.com

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata
Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Xloader Payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1968-61-0x0000000000400000-0x0000000000427000-memory.dmp	xloader
behavioral1/memory/1968-62-0x000000000041C160-mapping.dmp	xloader
behavioral1/memory/1968-64-0x0000000000400000-0x0000000000427000-memory.dmp	xloader
behavioral1/memory/1440-72-0x0000000000130000-0x0000000000157000-memory.dmp	xloader

Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

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:

PO0932083943974.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	PO0932083943974.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	PO0932083943974.exe

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

Data from Local System
T1005

Credentials in Files
T1081
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

cmstp.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	cmstp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Z2KDMLUH5V = "C:\\Program Files (x86)\\Gkrwtjle\\mfcpbctqf.exe"	cmstp.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:

PO0932083943974.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	PO0932083943974.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	PO0932083943974.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

PO0932083943974.exevbc.execmstp.exe

description	pid	process	target process
PID 1972 set thread context of 1968	1972	PO0932083943974.exe	vbc.exe
PID 1968 set thread context of 1292	1968	vbc.exe	Explorer.EXE
PID 1440 set thread context of 1292	1440	cmstp.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

cmstp.exe

description ioc process

File opened for modification C:\Program Files (x86)\Gkrwtjle\mfcpbctqf.exe cmstp.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Gkrwtjle\mfcpbctqf.exe	cmstp.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

cmstp.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-2277218442-1199762539-2004043321-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmstp.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

Processes:

PO0932083943974.exevbc.execmstp.exe

pid	process
1972	PO0932083943974.exe
1972	PO0932083943974.exe
1968	vbc.exe
1968	vbc.exe
1440	cmstp.exe
1440	cmstp.exe
1440	cmstp.exe
1440	cmstp.exe
1440	cmstp.exe
1440	cmstp.exe
1440	cmstp.exe
1440	cmstp.exe
1440	cmstp.exe
1440	cmstp.exe
1440	cmstp.exe
1440	cmstp.exe
1440	cmstp.exe
1440	cmstp.exe
1440	cmstp.exe
1440	cmstp.exe
1440	cmstp.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

vbc.execmstp.exe

pid process

1968 vbc.exe
1968 vbc.exe
1968 vbc.exe
1440 cmstp.exe
1440 cmstp.exe
1440 cmstp.exe
1440 cmstp.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

PO0932083943974.exevbc.execmstp.exe

description pid process

Token: SeDebugPrivilege 1972 PO0932083943974.exe
Token: SeDebugPrivilege 1968 vbc.exe
Token: SeDebugPrivilege 1440 cmstp.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1292 Explorer.EXE
1292 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1292 Explorer.EXE
1292 Explorer.EXE

pid	process
1968	vbc.exe
1968	vbc.exe
1968	vbc.exe
1440	cmstp.exe
1440	cmstp.exe
1440	cmstp.exe
1440	cmstp.exe

description	pid	process
Token: SeDebugPrivilege	1972	PO0932083943974.exe
Token: SeDebugPrivilege	1968	vbc.exe
Token: SeDebugPrivilege	1440	cmstp.exe

pid	process
1292	Explorer.EXE
1292	Explorer.EXE

pid	process
1292	Explorer.EXE
1292	Explorer.EXE

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

PO0932083943974.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 1972 wrote to memory of 1728	1972	PO0932083943974.exe	vbc.exe
PID 1972 wrote to memory of 1728	1972	PO0932083943974.exe	vbc.exe
PID 1972 wrote to memory of 1728	1972	PO0932083943974.exe	vbc.exe
PID 1972 wrote to memory of 1728	1972	PO0932083943974.exe	vbc.exe
PID 1972 wrote to memory of 1968	1972	PO0932083943974.exe	vbc.exe
PID 1972 wrote to memory of 1968	1972	PO0932083943974.exe	vbc.exe
PID 1972 wrote to memory of 1968	1972	PO0932083943974.exe	vbc.exe
PID 1972 wrote to memory of 1968	1972	PO0932083943974.exe	vbc.exe
PID 1972 wrote to memory of 1968	1972	PO0932083943974.exe	vbc.exe
PID 1972 wrote to memory of 1968	1972	PO0932083943974.exe	vbc.exe
PID 1972 wrote to memory of 1968	1972	PO0932083943974.exe	vbc.exe
PID 1292 wrote to memory of 1440	1292	Explorer.EXE	cmstp.exe
PID 1292 wrote to memory of 1440	1292	Explorer.EXE	cmstp.exe
PID 1292 wrote to memory of 1440	1292	Explorer.EXE	cmstp.exe
PID 1292 wrote to memory of 1440	1292	Explorer.EXE	cmstp.exe
PID 1292 wrote to memory of 1440	1292	Explorer.EXE	cmstp.exe
PID 1292 wrote to memory of 1440	1292	Explorer.EXE	cmstp.exe
PID 1292 wrote to memory of 1440	1292	Explorer.EXE	cmstp.exe
PID 1440 wrote to memory of 1964	1440	cmstp.exe	cmd.exe
PID 1440 wrote to memory of 1964	1440	cmstp.exe	cmd.exe
PID 1440 wrote to memory of 1964	1440	cmstp.exe	cmd.exe
PID 1440 wrote to memory of 1964	1440	cmstp.exe	cmd.exe
PID 1440 wrote to memory of 1000	1440	cmstp.exe	Firefox.exe
PID 1440 wrote to memory of 1000	1440	cmstp.exe	Firefox.exe
PID 1440 wrote to memory of 1000	1440	cmstp.exe	Firefox.exe
PID 1440 wrote to memory of 1000	1440	cmstp.exe	Firefox.exe
PID 1440 wrote to memory of 1000	1440	cmstp.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1292

C:\Users\Admin\AppData\Local\Temp\PO0932083943974.exe
"C:\Users\Admin\AppData\Local\Temp\PO0932083943974.exe"
2⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1972

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
3⤵
PID:1728

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1968

C:\Windows\SysWOW64\cmstp.exe
"C:\Windows\SysWOW64\cmstp.exe"
2⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1440

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
3⤵
PID:1964

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1000

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Scripting

1

T1064

Modify Registry

2

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

4

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

2

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1292-67-0x0000000006E40000-0x0000000006FC4000-memory.dmp

Filesize
1.5MB

Download
memory/1292-75-0x0000000006990000-0x0000000006AED000-memory.dmp

Filesize
1.4MB

Download
memory/1440-74-0x00000000008D0000-0x000000000095F000-memory.dmp

Filesize
572KB

Download
memory/1440-73-0x00000000009E0000-0x0000000000CE3000-memory.dmp

Filesize
3.0MB

Download
memory/1440-72-0x0000000000130000-0x0000000000157000-memory.dmp

Filesize
156KB

Download
memory/1440-71-0x0000000000FF0000-0x0000000001008000-memory.dmp

Filesize
96KB

Download
memory/1440-68-0x0000000000000000-mapping.dmp

Download
memory/1964-70-0x0000000000000000-mapping.dmp

Download
memory/1968-58-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1968-65-0x0000000000730000-0x0000000000A33000-memory.dmp

Filesize
3.0MB

Download
memory/1968-66-0x00000000001B0000-0x00000000001C0000-memory.dmp

Filesize
64KB

Download
memory/1968-64-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1968-62-0x000000000041C160-mapping.dmp

Download
memory/1968-61-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1968-59-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1972-54-0x00000000010C0000-0x0000000001136000-memory.dmp

Filesize
472KB

Download
memory/1972-57-0x0000000000BB0000-0x0000000000BE6000-memory.dmp

Filesize
216KB

Download
memory/1972-56-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/1972-55-0x0000000076721000-0x0000000076723000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads