formbook | 9ead5269b73782863b592279c0dda02a31caadd92ccfec0983baa45ee3d7b238

General

Target

Vxcrtivy.exe
Size

55KB
MD5

60b18674b3feb337adae906acb45e1eb
SHA1

30eb9398c2cbaad158e2bc94f4b0ac9e8cfc734d
SHA256

9ead5269b73782863b592279c0dda02a31caadd92ccfec0983baa45ee3d7b238
SHA512

030bd81a4cdc5620e331c67ed8c5200473e06859faa89dc5b1f4a83c22179a5c56d77ca1d4f64f0a6f0d3caabb6a9367a4b15611df154b3d76955cdd5912754c

Score

10^/10

formbook xloader loader persistence rat spyware stealer suricata trojan

Malware Config

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 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1072-134-0x0000000000400000-0x000000000042D000-memory.dmp	xloader
behavioral2/memory/1072-136-0x0000000000400000-0x000000000042D000-memory.dmp	xloader
behavioral2/memory/2884-143-0x00000000003D0000-0x00000000003FD000-memory.dmp	xloader
behavioral2/memory/2884-147-0x00000000003D0000-0x00000000003FD000-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:

RegAsm.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation RegAsm.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

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	RegAsm.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

systray.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	systray.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\TVSD6TT8_8P = "C:\\Program Files (x86)\\Japxlm43h\\yrwyv1th4o.exe"	systray.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

Vxcrtivy.exeRegAsm.exesystray.exe

description	pid	process	target process
PID 2324 set thread context of 1072	2324	Vxcrtivy.exe	RegAsm.exe
PID 1072 set thread context of 3304	1072	RegAsm.exe	Explorer.EXE
PID 2884 set thread context of 3304	2884	systray.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

systray.exe

description ioc process

File opened for modification C:\Program Files (x86)\Japxlm43h\yrwyv1th4o.exe systray.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Japxlm43h\yrwyv1th4o.exe	systray.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

systray.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	systray.exe

Suspicious behavior: EnumeratesProcesses 60 IoCs

Processes:

Vxcrtivy.exeRegAsm.exesystray.exe

pid	process
2324	Vxcrtivy.exe
2324	Vxcrtivy.exe
1072	RegAsm.exe
1072	RegAsm.exe
1072	RegAsm.exe
1072	RegAsm.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3304 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

RegAsm.exesystray.exe

pid process

1072 RegAsm.exe
1072 RegAsm.exe
1072 RegAsm.exe
2884 systray.exe
2884 systray.exe
2884 systray.exe
2884 systray.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Vxcrtivy.exeRegAsm.exesystray.exe

description pid process

Token: SeDebugPrivilege 2324 Vxcrtivy.exe
Token: SeDebugPrivilege 1072 RegAsm.exe
Token: SeDebugPrivilege 2884 systray.exe

pid	process
3304	Explorer.EXE

pid	process
1072	RegAsm.exe
1072	RegAsm.exe
1072	RegAsm.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe
2884	systray.exe

description	pid	process
Token: SeDebugPrivilege	2324	Vxcrtivy.exe
Token: SeDebugPrivilege	1072	RegAsm.exe
Token: SeDebugPrivilege	2884	systray.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

Vxcrtivy.exeExplorer.EXEsystray.exe

description	pid	process	target process
PID 2324 wrote to memory of 1072	2324	Vxcrtivy.exe	RegAsm.exe
PID 2324 wrote to memory of 1072	2324	Vxcrtivy.exe	RegAsm.exe
PID 2324 wrote to memory of 1072	2324	Vxcrtivy.exe	RegAsm.exe
PID 2324 wrote to memory of 1072	2324	Vxcrtivy.exe	RegAsm.exe
PID 2324 wrote to memory of 1072	2324	Vxcrtivy.exe	RegAsm.exe
PID 2324 wrote to memory of 1072	2324	Vxcrtivy.exe	RegAsm.exe
PID 3304 wrote to memory of 2884	3304	Explorer.EXE	systray.exe
PID 3304 wrote to memory of 2884	3304	Explorer.EXE	systray.exe
PID 3304 wrote to memory of 2884	3304	Explorer.EXE	systray.exe
PID 2884 wrote to memory of 4472	2884	systray.exe	cmd.exe
PID 2884 wrote to memory of 4472	2884	systray.exe	cmd.exe
PID 2884 wrote to memory of 4472	2884	systray.exe	cmd.exe
PID 2884 wrote to memory of 1056	2884	systray.exe	cmd.exe
PID 2884 wrote to memory of 1056	2884	systray.exe	cmd.exe
PID 2884 wrote to memory of 1056	2884	systray.exe	cmd.exe
PID 2884 wrote to memory of 4340	2884	systray.exe	cmd.exe
PID 2884 wrote to memory of 4340	2884	systray.exe	cmd.exe
PID 2884 wrote to memory of 4340	2884	systray.exe	cmd.exe
PID 2884 wrote to memory of 1732	2884	systray.exe	Firefox.exe
PID 2884 wrote to memory of 1732	2884	systray.exe	Firefox.exe
PID 2884 wrote to memory of 1732	2884	systray.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3304

C:\Users\Admin\AppData\Local\Temp\Vxcrtivy.exe
"C:\Users\Admin\AppData\Local\Temp\Vxcrtivy.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2324

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1072

C:\Windows\SysWOW64\systray.exe
"C:\Windows\SysWOW64\systray.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:2884

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
3⤵
PID:4472

C:\Windows\SysWOW64\cmd.exe
/c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
3⤵
PID:1056

C:\Windows\SysWOW64\cmd.exe
/c copy "C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
3⤵
PID:4340

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1732

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

C:\Users\Admin\AppData\Local\Temp\DB1
Filesize
40KB

MD5
b608d407fc15adea97c26936bc6f03f6

SHA1
953e7420801c76393902c0d6bb56148947e41571

SHA256
b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

SHA512
cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

Download Submit
C:\Users\Admin\AppData\Local\Temp\DB1
Filesize
48KB

MD5
349e6eb110e34a08924d92f6b334801d

SHA1
bdfb289daff51890cc71697b6322aa4b35ec9169

SHA256
c9fd7be4579e4aa942e8c2b44ab10115fa6c2fe6afd0c584865413d9d53f3b2a

SHA512
2a635b815a5e117ea181ee79305ee1baf591459427acc5210d8c6c7e447be3513ead871c605eb3d32e4ab4111b2a335f26520d0ef8c1245a4af44e1faec44574

Download Submit
memory/1056-149-0x0000000000000000-mapping.dmp

Download
memory/1072-134-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/1072-133-0x0000000000000000-mapping.dmp

Download
memory/1072-136-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/1072-137-0x00000000027F0000-0x0000000002B3A000-memory.dmp

Filesize
3.3MB

Download
memory/1072-138-0x00000000027B0000-0x00000000027C1000-memory.dmp

Filesize
68KB

Download
memory/2324-131-0x0000000005C00000-0x0000000005C66000-memory.dmp

Filesize
408KB

Download
memory/2324-132-0x0000000005EA0000-0x0000000005F32000-memory.dmp

Filesize
584KB

Download
memory/2324-130-0x0000000000600000-0x0000000000612000-memory.dmp

Filesize
72KB

Download
memory/2884-140-0x0000000000000000-mapping.dmp

Download
memory/2884-142-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/2884-143-0x00000000003D0000-0x00000000003FD000-memory.dmp

Filesize
180KB

Download
memory/2884-144-0x0000000002610000-0x000000000295A000-memory.dmp

Filesize
3.3MB

Download
memory/2884-145-0x0000000002340000-0x00000000023D0000-memory.dmp

Filesize
576KB

Download
memory/2884-147-0x00000000003D0000-0x00000000003FD000-memory.dmp

Filesize
180KB

Download
memory/3304-146-0x0000000006C20000-0x0000000006D1C000-memory.dmp

Filesize
1008KB

Download
memory/3304-148-0x0000000006C20000-0x0000000006D1C000-memory.dmp

Filesize
1008KB

Download
memory/3304-139-0x00000000027B0000-0x00000000028C3000-memory.dmp

Filesize
1.1MB

Download
memory/4340-151-0x0000000000000000-mapping.dmp

Download
memory/4472-141-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads