formbook | 34b54e55317003a0a2b8ff85ffa516a441d996a9f78fb074d6006cc40f3bd46f

General

Target

Payment_Advice.exe
Size

709KB
MD5

7ca80ef9cefc1bdf4d249e5a1b263672
SHA1

21acb1e653f73e26528839c7fef847d5b6734b0a
SHA256

34b54e55317003a0a2b8ff85ffa516a441d996a9f78fb074d6006cc40f3bd46f
SHA512

8bca4da57b2d34e3b7a0976ca74674429608986b3a82901ef6ecec6d5bc37b3c3753e657b69c021dbdb870ffdf1bc50afd4fc557a2f93cd7d5ce9fe516293f30

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
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
suricata

Xloader payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/2716-135-0x0000000000400000-0x000000000042D000-memory.dmp	xloader
behavioral2/memory/2716-141-0x0000000000400000-0x000000000042D000-memory.dmp	xloader
behavioral2/memory/4124-145-0x0000000000FB0000-0x0000000000FDC000-memory.dmp	xloader
behavioral2/memory/4124-148-0x0000000000FB0000-0x0000000000FDC000-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\VN7PN6IXK6 = "C:\\Program Files (x86)\\Mzrwt\\mfc5ju4m4k.exe"	systray.exe

Executes dropped EXE 1 IoCs

Processes:

mfc5ju4m4k.exe

pid process

5052 mfc5ju4m4k.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
5052	mfc5ju4m4k.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

Payment_Advice.exefsquirt.exesystray.exe

description	pid	process	target process
PID 4832 set thread context of 2716	4832	Payment_Advice.exe	fsquirt.exe
PID 2716 set thread context of 2416	2716	fsquirt.exe	Explorer.EXE
PID 4124 set thread context of 2416	4124	systray.exe	Explorer.EXE

Drops file in Program Files directory 4 IoCs

Processes:

systray.exeExplorer.EXE

description	ioc	process
File opened for modification	C:\Program Files (x86)\Mzrwt\mfc5ju4m4k.exe	systray.exe
File opened for modification	C:\Program Files (x86)\Mzrwt	Explorer.EXE
File created	C:\Program Files (x86)\Mzrwt\mfc5ju4m4k.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\Mzrwt\mfc5ju4m4k.exe	Explorer.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-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	systray.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

Payment_Advice.exefsquirt.exesystray.exe

pid	process
4832	Payment_Advice.exe
4832	Payment_Advice.exe
4832	Payment_Advice.exe
4832	Payment_Advice.exe
4832	Payment_Advice.exe
4832	Payment_Advice.exe
4832	Payment_Advice.exe
4832	Payment_Advice.exe
4832	Payment_Advice.exe
4832	Payment_Advice.exe
2716	fsquirt.exe
2716	fsquirt.exe
2716	fsquirt.exe
2716	fsquirt.exe
4832	Payment_Advice.exe
4832	Payment_Advice.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2416 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

fsquirt.exesystray.exe

pid process

2716 fsquirt.exe
2716 fsquirt.exe
2716 fsquirt.exe
4124 systray.exe
4124 systray.exe
4124 systray.exe
4124 systray.exe

pid	process
2416	Explorer.EXE

pid	process
2716	fsquirt.exe
2716	fsquirt.exe
2716	fsquirt.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe
4124	systray.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

Processes:

Payment_Advice.exefsquirt.exesystray.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	4832	Payment_Advice.exe
Token: SeDebugPrivilege	2716	fsquirt.exe
Token: SeDebugPrivilege	4124	systray.exe
Token: SeShutdownPrivilege	2416	Explorer.EXE
Token: SeCreatePagefilePrivilege	2416	Explorer.EXE
Token: SeShutdownPrivilege	2416	Explorer.EXE
Token: SeCreatePagefilePrivilege	2416	Explorer.EXE

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

Payment_Advice.exeExplorer.EXEsystray.exe

description	pid	process	target process
PID 4832 wrote to memory of 2996	4832	Payment_Advice.exe	notepad.exe
PID 4832 wrote to memory of 2996	4832	Payment_Advice.exe	notepad.exe
PID 4832 wrote to memory of 2996	4832	Payment_Advice.exe	notepad.exe
PID 4832 wrote to memory of 2716	4832	Payment_Advice.exe	fsquirt.exe
PID 4832 wrote to memory of 2716	4832	Payment_Advice.exe	fsquirt.exe
PID 4832 wrote to memory of 2716	4832	Payment_Advice.exe	fsquirt.exe
PID 4832 wrote to memory of 2716	4832	Payment_Advice.exe	fsquirt.exe
PID 4832 wrote to memory of 2716	4832	Payment_Advice.exe	fsquirt.exe
PID 4832 wrote to memory of 2716	4832	Payment_Advice.exe	fsquirt.exe
PID 4832 wrote to memory of 2716	4832	Payment_Advice.exe	fsquirt.exe
PID 2416 wrote to memory of 4124	2416	Explorer.EXE	systray.exe
PID 2416 wrote to memory of 4124	2416	Explorer.EXE	systray.exe
PID 2416 wrote to memory of 4124	2416	Explorer.EXE	systray.exe
PID 4124 wrote to memory of 1064	4124	systray.exe	cmd.exe
PID 4124 wrote to memory of 1064	4124	systray.exe	cmd.exe
PID 4124 wrote to memory of 1064	4124	systray.exe	cmd.exe
PID 4124 wrote to memory of 3656	4124	systray.exe	cmd.exe
PID 4124 wrote to memory of 3656	4124	systray.exe	cmd.exe
PID 4124 wrote to memory of 3656	4124	systray.exe	cmd.exe
PID 4124 wrote to memory of 2892	4124	systray.exe	cmd.exe
PID 4124 wrote to memory of 2892	4124	systray.exe	cmd.exe
PID 4124 wrote to memory of 2892	4124	systray.exe	cmd.exe
PID 4124 wrote to memory of 2588	4124	systray.exe	Firefox.exe
PID 4124 wrote to memory of 2588	4124	systray.exe	Firefox.exe
PID 4124 wrote to memory of 2588	4124	systray.exe	Firefox.exe
PID 2416 wrote to memory of 5052	2416	Explorer.EXE	mfc5ju4m4k.exe
PID 2416 wrote to memory of 5052	2416	Explorer.EXE	mfc5ju4m4k.exe
PID 2416 wrote to memory of 5052	2416	Explorer.EXE	mfc5ju4m4k.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Program Files directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2416

C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe
"C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4832

C:\Windows\SysWOW64\notepad.exe
"C:\Windows\SysWOW64\notepad.exe"
3⤵
PID:2996

C:\Windows\SysWOW64\fsquirt.exe
"C:\Windows\SysWOW64\fsquirt.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:2716

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:4124

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\SysWOW64\fsquirt.exe"
3⤵
PID:1064

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:3656

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:2892

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:2588

C:\Program Files (x86)\Mzrwt\mfc5ju4m4k.exe
"C:\Program Files (x86)\Mzrwt\mfc5ju4m4k.exe"
2⤵
- Executes dropped EXE
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:\Program Files (x86)\Mzrwt\mfc5ju4m4k.exe
Filesize
125KB

MD5
ba54013cad72cd79d2b7843602835ed3

SHA1
f89261d8ab16cfeca8a26a9e49dab0aeebf1f0db

SHA256
323d09a48b982f2e880f4bc529f6756bbe53cb59ced8deabbf3705cd5de935e2

SHA512
bb8909c633d751282821de98592faf6a5e7ec29f8f7426b5874cad495c2683efa08897087b8c948200a27b41c16d83220f2d6f1146b775515b89da6ac24a0397

Download Submit
C:\Program Files (x86)\Mzrwt\mfc5ju4m4k.exe
Filesize
125KB

MD5
ba54013cad72cd79d2b7843602835ed3

SHA1
f89261d8ab16cfeca8a26a9e49dab0aeebf1f0db

SHA256
323d09a48b982f2e880f4bc529f6756bbe53cb59ced8deabbf3705cd5de935e2

SHA512
bb8909c633d751282821de98592faf6a5e7ec29f8f7426b5874cad495c2683efa08897087b8c948200a27b41c16d83220f2d6f1146b775515b89da6ac24a0397

Download Submit
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/1064-142-0x0000000000000000-mapping.dmp

Download
memory/2416-139-0x0000000003780000-0x0000000003858000-memory.dmp

Filesize
864KB

Download
memory/2416-149-0x0000000003860000-0x00000000038F6000-memory.dmp

Filesize
600KB

Download
memory/2416-147-0x0000000003860000-0x00000000038F6000-memory.dmp

Filesize
600KB

Download
memory/2716-137-0x0000000001030000-0x000000000137A000-memory.dmp

Filesize
3.3MB

Download
memory/2716-135-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/2716-141-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/2716-138-0x0000000000C70000-0x0000000000C81000-memory.dmp

Filesize
68KB

Download
memory/2716-134-0x0000000000000000-mapping.dmp

Download
memory/2892-152-0x0000000000000000-mapping.dmp

Download
memory/2996-133-0x0000000000000000-mapping.dmp

Download
memory/3656-150-0x0000000000000000-mapping.dmp

Download
memory/4124-144-0x0000000003030000-0x000000000337A000-memory.dmp

Filesize
3.3MB

Download
memory/4124-148-0x0000000000FB0000-0x0000000000FDC000-memory.dmp

Filesize
176KB

Download
memory/4124-146-0x0000000002EC0000-0x0000000002F50000-memory.dmp

Filesize
576KB

Download
memory/4124-145-0x0000000000FB0000-0x0000000000FDC000-memory.dmp

Filesize
176KB

Download
memory/4124-140-0x0000000000000000-mapping.dmp

Download
memory/4124-143-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4832-130-0x0000000000DF0000-0x0000000000EA8000-memory.dmp

Filesize
736KB

Download
memory/4832-132-0x00000000058B0000-0x00000000058CE000-memory.dmp

Filesize
120KB

Download
memory/4832-131-0x0000000005800000-0x0000000005876000-memory.dmp

Filesize
472KB

Download
memory/5052-154-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads