formbook | b4a7371bb84b4f72e390e8f247a7978f2c2ff173d555261442151ef918cdb969

General

Target

ur0Wh1IXZqT3XDP.exe
Size

495KB
MD5

389205cb7d0e4aff8ced73933cb8c540
SHA1

7feda5387f15dd58f5479184c698811fd829604e
SHA256

b4a7371bb84b4f72e390e8f247a7978f2c2ff173d555261442151ef918cdb969
SHA512

0ef5eb7aec2c239ba58ede1149874f2e4795ef33edad824e289d37c9b7bf639262306ac569be8b832c69a90eaabb3bda812efc009fb2a9b11eb41cc21cfb7703

Score

10^/10

formbook xloader zzun loader persistence rat spyware stealer suricata 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
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata

Xloader payload 5 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1380-62-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/1380-63-0x000000000041F6F0-mapping.dmp	xloader
behavioral1/memory/1380-65-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/1380-73-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/764-77-0x0000000000090000-0x00000000000BC000-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:

ur0Wh1IXZqT3XDP.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Control Panel\International\Geo\Nation	ur0Wh1IXZqT3XDP.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1032 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
1032	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\VFIL_RNHERNX = "C:\\Program Files (x86)\\Jw0h8ip\\vgamrtp8bmx.exe"	cmstp.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

ur0Wh1IXZqT3XDP.exeur0Wh1IXZqT3XDP.execmstp.exe

description	pid	process	target process
PID 1884 set thread context of 1380	1884	ur0Wh1IXZqT3XDP.exe	ur0Wh1IXZqT3XDP.exe
PID 1380 set thread context of 1188	1380	ur0Wh1IXZqT3XDP.exe	Explorer.EXE
PID 1380 set thread context of 1188	1380	ur0Wh1IXZqT3XDP.exe	Explorer.EXE
PID 764 set thread context of 1188	764	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)\Jw0h8ip\vgamrtp8bmx.exe cmstp.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Jw0h8ip\vgamrtp8bmx.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-1-5-21-3762437355-3468409815-1164039494-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmstp.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

Processes:

ur0Wh1IXZqT3XDP.execmstp.exe

pid	process
1380	ur0Wh1IXZqT3XDP.exe
1380	ur0Wh1IXZqT3XDP.exe
1380	ur0Wh1IXZqT3XDP.exe
764	cmstp.exe
764	cmstp.exe
764	cmstp.exe
764	cmstp.exe
764	cmstp.exe
764	cmstp.exe
764	cmstp.exe
764	cmstp.exe
764	cmstp.exe
764	cmstp.exe
764	cmstp.exe
764	cmstp.exe
764	cmstp.exe
764	cmstp.exe
764	cmstp.exe
764	cmstp.exe
764	cmstp.exe

Suspicious behavior: MapViewOfSection 8 IoCs

Processes:

ur0Wh1IXZqT3XDP.execmstp.exe

pid	process
1380	ur0Wh1IXZqT3XDP.exe
1380	ur0Wh1IXZqT3XDP.exe
1380	ur0Wh1IXZqT3XDP.exe
1380	ur0Wh1IXZqT3XDP.exe
764	cmstp.exe
764	cmstp.exe
764	cmstp.exe
764	cmstp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

ur0Wh1IXZqT3XDP.execmstp.exe

description pid process

Token: SeDebugPrivilege 1380 ur0Wh1IXZqT3XDP.exe
Token: SeDebugPrivilege 764 cmstp.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1188 Explorer.EXE
1188 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1188 Explorer.EXE
1188 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1380	ur0Wh1IXZqT3XDP.exe
Token: SeDebugPrivilege	764	cmstp.exe

pid	process
1188	Explorer.EXE
1188	Explorer.EXE

pid	process
1188	Explorer.EXE
1188	Explorer.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

ur0Wh1IXZqT3XDP.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 1884 wrote to memory of 1380	1884	ur0Wh1IXZqT3XDP.exe	ur0Wh1IXZqT3XDP.exe
PID 1884 wrote to memory of 1380	1884	ur0Wh1IXZqT3XDP.exe	ur0Wh1IXZqT3XDP.exe
PID 1884 wrote to memory of 1380	1884	ur0Wh1IXZqT3XDP.exe	ur0Wh1IXZqT3XDP.exe
PID 1884 wrote to memory of 1380	1884	ur0Wh1IXZqT3XDP.exe	ur0Wh1IXZqT3XDP.exe
PID 1884 wrote to memory of 1380	1884	ur0Wh1IXZqT3XDP.exe	ur0Wh1IXZqT3XDP.exe
PID 1884 wrote to memory of 1380	1884	ur0Wh1IXZqT3XDP.exe	ur0Wh1IXZqT3XDP.exe
PID 1884 wrote to memory of 1380	1884	ur0Wh1IXZqT3XDP.exe	ur0Wh1IXZqT3XDP.exe
PID 1188 wrote to memory of 764	1188	Explorer.EXE	cmstp.exe
PID 1188 wrote to memory of 764	1188	Explorer.EXE	cmstp.exe
PID 1188 wrote to memory of 764	1188	Explorer.EXE	cmstp.exe
PID 1188 wrote to memory of 764	1188	Explorer.EXE	cmstp.exe
PID 1188 wrote to memory of 764	1188	Explorer.EXE	cmstp.exe
PID 1188 wrote to memory of 764	1188	Explorer.EXE	cmstp.exe
PID 1188 wrote to memory of 764	1188	Explorer.EXE	cmstp.exe
PID 764 wrote to memory of 1032	764	cmstp.exe	cmd.exe
PID 764 wrote to memory of 1032	764	cmstp.exe	cmd.exe
PID 764 wrote to memory of 1032	764	cmstp.exe	cmd.exe
PID 764 wrote to memory of 1032	764	cmstp.exe	cmd.exe
PID 764 wrote to memory of 824	764	cmstp.exe	Firefox.exe
PID 764 wrote to memory of 824	764	cmstp.exe	Firefox.exe
PID 764 wrote to memory of 824	764	cmstp.exe	Firefox.exe
PID 764 wrote to memory of 824	764	cmstp.exe	Firefox.exe
PID 764 wrote to memory of 824	764	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:1188

C:\Users\Admin\AppData\Local\Temp\ur0Wh1IXZqT3XDP.exe
"C:\Users\Admin\AppData\Local\Temp\ur0Wh1IXZqT3XDP.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1884

C:\Users\Admin\AppData\Local\Temp\ur0Wh1IXZqT3XDP.exe
"{path}"
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1380

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1340

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:2044

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:2040

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:304

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:2028

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:868

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:2000

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:580

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:468

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:576

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:568

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:520

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1292

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1488

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1528

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1240

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1500

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1476

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1572

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1624

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1648

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:864

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1404

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1708

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1304

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1396

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1984

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1732

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:556

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:308

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:552

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1020

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:764

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\ur0Wh1IXZqT3XDP.exe"
3⤵
- Deletes itself
PID:1032

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:824

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/764-72-0x0000000000000000-mapping.dmp

Download
memory/764-79-0x00000000003F0000-0x0000000000480000-memory.dmp

Filesize
576KB

Download
memory/764-78-0x0000000002260000-0x0000000002563000-memory.dmp

Filesize
3.0MB

Download
memory/764-77-0x0000000000090000-0x00000000000BC000-memory.dmp

Filesize
176KB

Download
memory/764-76-0x0000000000E40000-0x0000000000E58000-memory.dmp

Filesize
96KB

Download
memory/1032-75-0x0000000000000000-mapping.dmp

Download
memory/1188-68-0x0000000004B10000-0x0000000004C05000-memory.dmp

Filesize
980KB

Download
memory/1188-71-0x00000000060C0000-0x00000000061B6000-memory.dmp

Filesize
984KB

Download
memory/1188-81-0x00000000061C0000-0x0000000006263000-memory.dmp

Filesize
652KB

Download
memory/1188-80-0x00000000061C0000-0x0000000006263000-memory.dmp

Filesize
652KB

Download
memory/1380-60-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1380-59-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1380-63-0x000000000041F6F0-mapping.dmp

Download
memory/1380-70-0x0000000000350000-0x0000000000361000-memory.dmp

Filesize
68KB

Download
memory/1380-66-0x0000000000890000-0x0000000000B93000-memory.dmp

Filesize
3.0MB

Download
memory/1380-62-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1380-73-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1380-67-0x0000000000200000-0x0000000000211000-memory.dmp

Filesize
68KB

Download
memory/1380-65-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1884-57-0x0000000004840000-0x00000000048C0000-memory.dmp

Filesize
512KB

Download
memory/1884-56-0x0000000000210000-0x000000000021A000-memory.dmp

Filesize
40KB

Download
memory/1884-55-0x00000000769D1000-0x00000000769D3000-memory.dmp

Filesize
8KB

Download
memory/1884-58-0x00000000004C0000-0x00000000004F2000-memory.dmp

Filesize
200KB

Download
memory/1884-54-0x0000000000BF0000-0x0000000000C72000-memory.dmp

Filesize
520KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads