formbook | b88777182ffbc0f28b68902a00f0b8a51b8dee4ef0104720a9ca92e18d920d81

General

Target

INVOICE xlsx.exe
Size

661KB
MD5

c3d9581dfe9bc99d5999828f4177b264
SHA1

42f526e8bcae0f3e6404e9bed89431cd6b5c9fa4
SHA256

b88777182ffbc0f28b68902a00f0b8a51b8dee4ef0104720a9ca92e18d920d81
SHA512

d0c71bbc6b363cda4f2e686eb40e8b3295e7f6a43d42aaeecc5a99a64a7960a5d2594733af336aca1dd1204d2abec3f9311ccbb4db53894c95c818bc21248671

Score

10^/10

formbook xloader t20a loader persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

xloader

Version

2.6

Campaign

t20a

Decoy

ovewaci.com

explorebantentravel.com

productdesigninfo.com

harlis-kapitol.com

amishaentertainment.com

lauraheagy.com

sjg-central.xyz

amberdreamscattery.com

4848caomm2.com

a1brts.com

americareambulance.com

geekplusrobots.com

wiggitywack.com

baileyit.com

1dayshade.com

dergburo.com

aljeb.com

winnerisserved.com

safetyutilityeng.com

pchconsumerwinneralert.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

Xloader Payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/3392-137-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral2/memory/3392-143-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral2/memory/2724-146-0x00000000003D0000-0x00000000003FB000-memory.dmp	xloader
behavioral2/memory/2724-150-0x00000000003D0000-0x00000000003FB000-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:

systray.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	systray.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\8PMPMJXPJ0H = "C:\\Program Files (x86)\\Tf0h\\regsvcxlsd.exe"	systray.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

Suspicious use of SetThreadContext 3 IoCs

Processes:

INVOICE xlsx.exeINVOICE xlsx.exesystray.exe

description	pid	process	target process
PID 4504 set thread context of 3392	4504	INVOICE xlsx.exe	INVOICE xlsx.exe
PID 3392 set thread context of 3188	3392	INVOICE xlsx.exe	Explorer.EXE
PID 2724 set thread context of 3188	2724	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)\Tf0h\regsvcxlsd.exe systray.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Tf0h\regsvcxlsd.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 34 IoCs

Processes:

INVOICE xlsx.exesystray.exe

pid	process
3392	INVOICE xlsx.exe
3392	INVOICE xlsx.exe
3392	INVOICE xlsx.exe
3392	INVOICE xlsx.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe
2724	systray.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3188 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

INVOICE xlsx.exesystray.exe

pid process

3392 INVOICE xlsx.exe
3392 INVOICE xlsx.exe
3392 INVOICE xlsx.exe
2724 systray.exe
2724 systray.exe
2724 systray.exe
2724 systray.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

INVOICE xlsx.exesystray.exe

description pid process

Token: SeDebugPrivilege 3392 INVOICE xlsx.exe
Token: SeDebugPrivilege 2724 systray.exe

pid	process
3188	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	3392	INVOICE xlsx.exe
Token: SeDebugPrivilege	2724	systray.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

INVOICE xlsx.exeExplorer.EXEsystray.exe

description	pid	process	target process
PID 4504 wrote to memory of 3392	4504	INVOICE xlsx.exe	INVOICE xlsx.exe
PID 4504 wrote to memory of 3392	4504	INVOICE xlsx.exe	INVOICE xlsx.exe
PID 4504 wrote to memory of 3392	4504	INVOICE xlsx.exe	INVOICE xlsx.exe
PID 4504 wrote to memory of 3392	4504	INVOICE xlsx.exe	INVOICE xlsx.exe
PID 4504 wrote to memory of 3392	4504	INVOICE xlsx.exe	INVOICE xlsx.exe
PID 4504 wrote to memory of 3392	4504	INVOICE xlsx.exe	INVOICE xlsx.exe
PID 3188 wrote to memory of 2724	3188	Explorer.EXE	systray.exe
PID 3188 wrote to memory of 2724	3188	Explorer.EXE	systray.exe
PID 3188 wrote to memory of 2724	3188	Explorer.EXE	systray.exe
PID 2724 wrote to memory of 400	2724	systray.exe	cmd.exe
PID 2724 wrote to memory of 400	2724	systray.exe	cmd.exe
PID 2724 wrote to memory of 400	2724	systray.exe	cmd.exe
PID 2724 wrote to memory of 792	2724	systray.exe	cmd.exe
PID 2724 wrote to memory of 792	2724	systray.exe	cmd.exe
PID 2724 wrote to memory of 792	2724	systray.exe	cmd.exe
PID 2724 wrote to memory of 1424	2724	systray.exe	cmd.exe
PID 2724 wrote to memory of 1424	2724	systray.exe	cmd.exe
PID 2724 wrote to memory of 1424	2724	systray.exe	cmd.exe
PID 2724 wrote to memory of 5052	2724	systray.exe	Firefox.exe
PID 2724 wrote to memory of 5052	2724	systray.exe	Firefox.exe
PID 2724 wrote to memory of 5052	2724	systray.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3188

C:\Users\Admin\AppData\Local\Temp\INVOICE xlsx.exe
"C:\Users\Admin\AppData\Local\Temp\INVOICE xlsx.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4504

C:\Users\Admin\AppData\Local\Temp\INVOICE xlsx.exe
"C:\Users\Admin\AppData\Local\Temp\INVOICE xlsx.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3392

C:\Windows\SysWOW64\systray.exe
"C:\Windows\SysWOW64\systray.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:2724

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\INVOICE xlsx.exe"
3⤵
PID:400

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:792

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:1424

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:5052

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

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/400-144-0x0000000000000000-mapping.dmp

Download
memory/792-152-0x0000000000000000-mapping.dmp

Download
memory/1424-154-0x0000000000000000-mapping.dmp

Download
memory/2724-150-0x00000000003D0000-0x00000000003FB000-memory.dmp

Filesize
172KB

Download
memory/2724-146-0x00000000003D0000-0x00000000003FB000-memory.dmp

Filesize
172KB

Download
memory/2724-148-0x00000000023B0000-0x0000000002440000-memory.dmp

Filesize
576KB

Download
memory/2724-147-0x00000000024E0000-0x000000000282A000-memory.dmp

Filesize
3.3MB

Download
memory/2724-142-0x0000000000000000-mapping.dmp

Download
memory/2724-145-0x0000000000BC0000-0x0000000000BC6000-memory.dmp

Filesize
24KB

Download
memory/3188-149-0x0000000008A80000-0x0000000008B28000-memory.dmp

Filesize
672KB

Download
memory/3188-141-0x00000000030D0000-0x0000000003222000-memory.dmp

Filesize
1.3MB

Download
memory/3188-151-0x0000000008A80000-0x0000000008B28000-memory.dmp

Filesize
672KB

Download
memory/3392-136-0x0000000000000000-mapping.dmp

Download
memory/3392-143-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/3392-140-0x00000000015B0000-0x00000000015C1000-memory.dmp

Filesize
68KB

Download
memory/3392-139-0x00000000016F0000-0x0000000001A3A000-memory.dmp

Filesize
3.3MB

Download
memory/3392-137-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/4504-130-0x00000000005A0000-0x000000000064C000-memory.dmp

Filesize
688KB

Download
memory/4504-135-0x0000000000DB0000-0x0000000000E16000-memory.dmp

Filesize
408KB

Download
memory/4504-134-0x0000000007AB0000-0x0000000007B4C000-memory.dmp

Filesize
624KB

Download
memory/4504-133-0x0000000005070000-0x000000000507A000-memory.dmp

Filesize
40KB

Download
memory/4504-132-0x0000000004FD0000-0x0000000005062000-memory.dmp

Filesize
584KB

Download
memory/4504-131-0x00000000054D0000-0x0000000005A74000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads