formbook | 95265cd9d3be6a02382744a140d2fc7ef6dd5fbfec0c03acb0e37c49192d3f35

General

Target

SEGU9670620.exe
Size

708KB
MD5

f7893d4684dd47ba79b7ae6072811f00
SHA1

ff7adc2c8f2b9094361f3b2655152e4ea48e2c24
SHA256

95265cd9d3be6a02382744a140d2fc7ef6dd5fbfec0c03acb0e37c49192d3f35
SHA512

23d2c77e1e09ded7f2d0564767b57e238e07458ff8b08967acb6d179aa71415a4b9df4622005bc1c90f6cd102315a6e4c611edb87776fbe0b590f064cd8b9244

Score

10^/10

formbook xloader zzun loader persistence rat spyware stealer trojan

Malware Config

Extracted

Family

xloader

Version

2.9

Campaign

zzun

Decoy

JnNtRHyNupy0GqRzAcasu7hb4rc=

Qv593NGLE7p9UNSaVkPXljAJm2QCNnc=

ePArIFWvjkkMgVEVhw4M4Jk=

26rqUwJ7dD0AiDI=

pBAxMHeK741QFw==

kHD7TPt5846pUMTX

56UnjFjHL1i0j659h3LymRnHpQj+SshC

4vKlKHflPqmWXRbrRwfPtrhb4rc=

6LBd4qButFAi

phMzGll8Ue7Fu+inq5cdnPaSugG3

NKswiQGCvZoG5FgsdHEI

rtTHnuUY8M1qVcXV

SOmECrlAt2oGAA==

L1ep9adutFAi

/UE+/AyvE6uEl28weFI=

IP+xMPQxJR4NE6TK

xvW5GN9/rqA5YUoOVt185Sf7Uw==

fRFNW9DhxL6VF7LA

KFYTfkaY741QFw==

W4JGvMBmt2oGAA==

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

Xloader payload 5 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1328-62-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/1328-63-0x000000000041F6F0-mapping.dmp	xloader
behavioral1/memory/1328-65-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/1148-72-0x0000000000090000-0x00000000000BC000-memory.dmp	xloader
behavioral1/memory/1148-78-0x0000000000090000-0x00000000000BC000-memory.dmp	xloader

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

SEGU9670620.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-335065374-4263250628-1829373619-1000\Control Panel\International\Geo\Nation	SEGU9670620.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1740 cmd.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

pid	process
1740	cmd.exe

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\6L0DZLEHW = "C:\\Program Files (x86)\\Gz4nhm\\wincfv.exe"	cmstp.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

SEGU9670620.exeSEGU9670620.execmstp.exe

description	pid	process	target process
PID 1656 set thread context of 1328	1656	SEGU9670620.exe	SEGU9670620.exe
PID 1328 set thread context of 1192	1328	SEGU9670620.exe	Explorer.EXE
PID 1148 set thread context of 1192	1148	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)\Gz4nhm\wincfv.exe cmstp.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Gz4nhm\wincfv.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-1-5-21-335065374-4263250628-1829373619-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmstp.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

Processes:

SEGU9670620.execmstp.exe

pid	process
1328	SEGU9670620.exe
1328	SEGU9670620.exe
1148	cmstp.exe
1148	cmstp.exe
1148	cmstp.exe
1148	cmstp.exe
1148	cmstp.exe
1148	cmstp.exe
1148	cmstp.exe
1148	cmstp.exe
1148	cmstp.exe
1148	cmstp.exe
1148	cmstp.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

SEGU9670620.execmstp.exe

pid process

1328 SEGU9670620.exe
1328 SEGU9670620.exe
1328 SEGU9670620.exe
1148 cmstp.exe
1148 cmstp.exe
1148 cmstp.exe
1148 cmstp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

SEGU9670620.execmstp.exe

description pid process

Token: SeDebugPrivilege 1328 SEGU9670620.exe
Token: SeDebugPrivilege 1148 cmstp.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1192 Explorer.EXE
1192 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1192 Explorer.EXE
1192 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1328	SEGU9670620.exe
Token: SeDebugPrivilege	1148	cmstp.exe

pid	process
1192	Explorer.EXE
1192	Explorer.EXE

pid	process
1192	Explorer.EXE
1192	Explorer.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

SEGU9670620.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 1656 wrote to memory of 1328	1656	SEGU9670620.exe	SEGU9670620.exe
PID 1656 wrote to memory of 1328	1656	SEGU9670620.exe	SEGU9670620.exe
PID 1656 wrote to memory of 1328	1656	SEGU9670620.exe	SEGU9670620.exe
PID 1656 wrote to memory of 1328	1656	SEGU9670620.exe	SEGU9670620.exe
PID 1656 wrote to memory of 1328	1656	SEGU9670620.exe	SEGU9670620.exe
PID 1656 wrote to memory of 1328	1656	SEGU9670620.exe	SEGU9670620.exe
PID 1656 wrote to memory of 1328	1656	SEGU9670620.exe	SEGU9670620.exe
PID 1192 wrote to memory of 1148	1192	Explorer.EXE	cmstp.exe
PID 1192 wrote to memory of 1148	1192	Explorer.EXE	cmstp.exe
PID 1192 wrote to memory of 1148	1192	Explorer.EXE	cmstp.exe
PID 1192 wrote to memory of 1148	1192	Explorer.EXE	cmstp.exe
PID 1192 wrote to memory of 1148	1192	Explorer.EXE	cmstp.exe
PID 1192 wrote to memory of 1148	1192	Explorer.EXE	cmstp.exe
PID 1192 wrote to memory of 1148	1192	Explorer.EXE	cmstp.exe
PID 1148 wrote to memory of 1740	1148	cmstp.exe	cmd.exe
PID 1148 wrote to memory of 1740	1148	cmstp.exe	cmd.exe
PID 1148 wrote to memory of 1740	1148	cmstp.exe	cmd.exe
PID 1148 wrote to memory of 1740	1148	cmstp.exe	cmd.exe
PID 1148 wrote to memory of 1480	1148	cmstp.exe	Firefox.exe
PID 1148 wrote to memory of 1480	1148	cmstp.exe	Firefox.exe
PID 1148 wrote to memory of 1480	1148	cmstp.exe	Firefox.exe
PID 1148 wrote to memory of 1480	1148	cmstp.exe	Firefox.exe
PID 1148 wrote to memory of 1480	1148	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:1192

C:\Users\Admin\AppData\Local\Temp\SEGU9670620.exe
"C:\Users\Admin\AppData\Local\Temp\SEGU9670620.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1656

C:\Users\Admin\AppData\Local\Temp\SEGU9670620.exe
"{path}"
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1328

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:1148

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\SEGU9670620.exe"
3⤵
- Deletes itself
PID:1740

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1480

Network

MITRE ATT&CK Matrix ATT&CK 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

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

memory/1148-78-0x0000000000090000-0x00000000000BC000-memory.dmp

Filesize
176KB

Download
memory/1148-75-0x0000000000AD0000-0x0000000000B60000-memory.dmp

Filesize
576KB

Download
memory/1148-74-0x0000000002250000-0x0000000002553000-memory.dmp

Filesize
3.0MB

Download
memory/1148-71-0x0000000000CA0000-0x0000000000CB8000-memory.dmp

Filesize
96KB

Download
memory/1148-72-0x0000000000090000-0x00000000000BC000-memory.dmp

Filesize
176KB

Download
memory/1148-69-0x0000000000000000-mapping.dmp

Download
memory/1192-68-0x0000000005020000-0x0000000005189000-memory.dmp

Filesize
1.4MB

Download
memory/1192-79-0x0000000006C60000-0x0000000006D94000-memory.dmp

Filesize
1.2MB

Download
memory/1192-77-0x0000000005020000-0x0000000005189000-memory.dmp

Filesize
1.4MB

Download
memory/1192-76-0x0000000006C60000-0x0000000006D94000-memory.dmp

Filesize
1.2MB

Download
memory/1328-59-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1328-67-0x0000000000170000-0x0000000000181000-memory.dmp

Filesize
68KB

Download
memory/1328-66-0x00000000008C0000-0x0000000000BC3000-memory.dmp

Filesize
3.0MB

Download
memory/1328-65-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1328-63-0x000000000041F6F0-mapping.dmp

Download
memory/1328-62-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1328-60-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1656-54-0x00000000011C0000-0x0000000001278000-memory.dmp

Filesize
736KB

Download
memory/1656-58-0x00000000009E0000-0x0000000000A16000-memory.dmp

Filesize
216KB

Download
memory/1656-57-0x0000000005730000-0x00000000057B8000-memory.dmp

Filesize
544KB

Download
memory/1656-56-0x0000000000580000-0x000000000058A000-memory.dmp

Filesize
40KB

Download
memory/1656-55-0x0000000075CD1000-0x0000000075CD3000-memory.dmp

Filesize
8KB

Download
memory/1740-73-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads