formbook | a7c1f4ae5c35b88e68b4d82db4c7e14d53922946d853569b5efd5050e7480229

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
02-09-2022 03:27

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General

Target

44.exe
Size

180KB
MD5

4655391b02be2427e3f1985ec687678b
SHA1

6c05c1d258e3dfddd7b10053ab7d5574720678f7
SHA256

8ff8e3b32d53e0c28d01f3487add2a6f12cbb493449b401382951b02c06777f0
SHA512

2b0411b8478a39bec3dec6abe0c3e522f95a90addbbd2bde9bbda25779aba3abbcef926134b7cc746c7811bcda7e6a9192b1bc56efbbf047a9fd93bbd2e4c661
SSDEEP

3072:MT2jRLlS/s+YDWhRW08JgsJZUzjsL54hdiNYKgd9m7YapOW:Fjpo3Yn08J7jUPi54hdtM7j

Score

10^/10

formbook xloader loader persistence rat spyware stealer 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

Xloader payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral12/memory/456-138-0x0000000000720000-0x000000000074D000-memory.dmp	xloader

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wlanext.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	wlanext.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\VBCDCRR0X0B = "C:\\Program Files (x86)\\Vbbc0x\\igfxenvh.exe"	wlanext.exe

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:

44.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation 44.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	44.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

44.exewlanext.exe

description	pid	process	target process
PID 3668 set thread context of 760	3668	44.exe	Explorer.EXE
PID 456 set thread context of 760	456	wlanext.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

wlanext.exe

description ioc process

File opened for modification C:\Program Files (x86)\Vbbc0x\igfxenvh.exe wlanext.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Vbbc0x\igfxenvh.exe	wlanext.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

wlanext.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	wlanext.exe

Suspicious behavior: EnumeratesProcesses 52 IoCs

Processes:

44.exewlanext.exe

pid	process
3668	44.exe
3668	44.exe
3668	44.exe
3668	44.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe
456	wlanext.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

760 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

44.exewlanext.exe

pid process

3668 44.exe
3668 44.exe
3668 44.exe
456 wlanext.exe
456 wlanext.exe
456 wlanext.exe
456 wlanext.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

44.exewlanext.exe

description pid process

Token: SeDebugPrivilege 3668 44.exe
Token: SeDebugPrivilege 456 wlanext.exe

pid	process
760	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	3668	44.exe
Token: SeDebugPrivilege	456	wlanext.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

Explorer.EXEwlanext.exe

description	pid	process	target process
PID 760 wrote to memory of 456	760	Explorer.EXE	wlanext.exe
PID 760 wrote to memory of 456	760	Explorer.EXE	wlanext.exe
PID 760 wrote to memory of 456	760	Explorer.EXE	wlanext.exe
PID 456 wrote to memory of 4884	456	wlanext.exe	cmd.exe
PID 456 wrote to memory of 4884	456	wlanext.exe	cmd.exe
PID 456 wrote to memory of 4884	456	wlanext.exe	cmd.exe
PID 456 wrote to memory of 396	456	wlanext.exe	cmd.exe
PID 456 wrote to memory of 396	456	wlanext.exe	cmd.exe
PID 456 wrote to memory of 396	456	wlanext.exe	cmd.exe
PID 456 wrote to memory of 3684	456	wlanext.exe	cmd.exe
PID 456 wrote to memory of 3684	456	wlanext.exe	cmd.exe
PID 456 wrote to memory of 3684	456	wlanext.exe	cmd.exe
PID 456 wrote to memory of 4484	456	wlanext.exe	Firefox.exe
PID 456 wrote to memory of 4484	456	wlanext.exe	Firefox.exe
PID 456 wrote to memory of 4484	456	wlanext.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:760

C:\Users\Admin\AppData\Local\Temp\44.exe
"C:\Users\Admin\AppData\Local\Temp\44.exe"
2⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3668

C:\Windows\SysWOW64\wlanext.exe
"C:\Windows\SysWOW64\wlanext.exe"
2⤵
- Adds policy 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:456

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\44.exe"
3⤵
PID:4884

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:396

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:3684

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:4484

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

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/396-143-0x0000000000000000-mapping.dmp

Download
memory/456-138-0x0000000000720000-0x000000000074D000-memory.dmp

Filesize
180KB

Download
memory/456-136-0x0000000000B70000-0x0000000000B87000-memory.dmp

Filesize
92KB

Download
memory/456-137-0x00000000010B0000-0x00000000013FA000-memory.dmp

Filesize
3.3MB

Download
memory/456-140-0x0000000000F00000-0x0000000000F90000-memory.dmp

Filesize
576KB

Download
memory/456-135-0x0000000000000000-mapping.dmp

Download
memory/760-141-0x0000000002C10000-0x0000000002D10000-memory.dmp

Filesize
1024KB

Download
memory/760-142-0x0000000002C10000-0x0000000002D10000-memory.dmp

Filesize
1024KB

Download
memory/760-134-0x00000000081F0000-0x0000000008387000-memory.dmp

Filesize
1.6MB

Download
memory/3668-132-0x0000000001440000-0x000000000178A000-memory.dmp

Filesize
3.3MB

Download
memory/3668-133-0x0000000001330000-0x0000000001341000-memory.dmp

Filesize
68KB

Download
memory/3684-145-0x0000000000000000-mapping.dmp

Download
memory/4884-139-0x0000000000000000-mapping.dmp

Download