formbook | 42e5467c1516b5291491f4acbac29889575738c9f0652655ce7b7eeffa2374d4

General

Target

smss.exe
Size

473KB
MD5

af158cff1deb238eb10b33b07d08a61e
SHA1

e0229b402990fad0fe92db278b3f4a3ed7a9767d
SHA256

42e5467c1516b5291491f4acbac29889575738c9f0652655ce7b7eeffa2374d4
SHA512

7c32eedea122a63ae3f6b1216e8ae9ec8141cf870ac0d456f3d7efe52a5e881253fa07596299d221acc6ff1a46915edcf31952eaee5d389249c309b85ff5f0c2

Score

10^/10

formbook xloader iewb loader persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

xloader

Version

2.9

Campaign

iewb

Decoy

n8FLlgIlb1rSEg5hJ9xMbw4hcmR38Q==

5vIAIY+pt81OtWs+FdIEdk7Y

LHIKc+oWGIQUUlfAAtEEdk7Y

ePM/cX2jvHrS

5hvPEw22+fdvmJz3C8FIVq0=

mb9EeX2jvHrS

Dx2zIYNvfjo8VUo5

6jVPnyJekv2RAc4gLKNwEqQ=

KWatHyjdE5Gj1Ng=

t9lk70gzUAZty4qjbVjF

6eUBeFPzKBWT125BFNIEdk7Y

dZUXOIyqTJGj1Ng=

iL3TVh2Jl5QVStnzxcAhIL8=

J1prtyklUfZGR/xDD71IbkWRd2yx

s9FgCOBRW9bU0Y6jbVjF

RYCbQDzcFBhcylgu

Fl0BV/8RJm6F9QRg8LXXTLo=

0dhumHzrCCZ3wdQg7nFF1AlL6Tk=

xvL+iL6wwX+/wH9K4lbZ/A==

N0lVceIFD5Gj1Ng=

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/1736-64-0x000000000041F840-mapping.dmp	xloader
behavioral1/memory/1736-63-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/1736-66-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/1072-74-0x0000000000120000-0x000000000014C000-memory.dmp	xloader
behavioral1/memory/1072-78-0x0000000000120000-0x000000000014C000-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:

smss.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Control Panel\International\Geo\Nation smss.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1936 cmd.exe
Loads dropped DLL 1 IoCs

Processes:

colorcpl.exe

pid process

1072 colorcpl.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-1-5-21-2277218442-1199762539-2004043321-1000\Control Panel\International\Geo\Nation	smss.exe

pid	process
1936	cmd.exe

pid	process
1072	colorcpl.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

colorcpl.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	colorcpl.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\H4D0B4P8DLX = "C:\\Program Files (x86)\\F2d00ef\\vgablu.exe"	colorcpl.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

smss.exesmss.execolorcpl.exe

description	pid	process	target process
PID 1092 set thread context of 1736	1092	smss.exe	smss.exe
PID 1736 set thread context of 1272	1736	smss.exe	Explorer.EXE
PID 1072 set thread context of 1272	1072	colorcpl.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

colorcpl.exe

description ioc process

File opened for modification C:\Program Files (x86)\F2d00ef\vgablu.exe colorcpl.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\F2d00ef\vgablu.exe	colorcpl.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

colorcpl.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-2277218442-1199762539-2004043321-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	colorcpl.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

Processes:

smss.execolorcpl.exe

pid	process
1736	smss.exe
1736	smss.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

smss.execolorcpl.exe

pid process

1736 smss.exe
1736 smss.exe
1736 smss.exe
1072 colorcpl.exe
1072 colorcpl.exe
1072 colorcpl.exe
1072 colorcpl.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

smss.execolorcpl.exe

description pid process

Token: SeDebugPrivilege 1736 smss.exe
Token: SeDebugPrivilege 1072 colorcpl.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1272 Explorer.EXE
1272 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1272 Explorer.EXE
1272 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1736	smss.exe
Token: SeDebugPrivilege	1072	colorcpl.exe

pid	process
1272	Explorer.EXE
1272	Explorer.EXE

pid	process
1272	Explorer.EXE
1272	Explorer.EXE

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

smss.exeExplorer.EXEcolorcpl.exe

description	pid	process	target process
PID 1092 wrote to memory of 1736	1092	smss.exe	smss.exe
PID 1092 wrote to memory of 1736	1092	smss.exe	smss.exe
PID 1092 wrote to memory of 1736	1092	smss.exe	smss.exe
PID 1092 wrote to memory of 1736	1092	smss.exe	smss.exe
PID 1092 wrote to memory of 1736	1092	smss.exe	smss.exe
PID 1092 wrote to memory of 1736	1092	smss.exe	smss.exe
PID 1092 wrote to memory of 1736	1092	smss.exe	smss.exe
PID 1272 wrote to memory of 1072	1272	Explorer.EXE	colorcpl.exe
PID 1272 wrote to memory of 1072	1272	Explorer.EXE	colorcpl.exe
PID 1272 wrote to memory of 1072	1272	Explorer.EXE	colorcpl.exe
PID 1272 wrote to memory of 1072	1272	Explorer.EXE	colorcpl.exe
PID 1072 wrote to memory of 1936	1072	colorcpl.exe	cmd.exe
PID 1072 wrote to memory of 1936	1072	colorcpl.exe	cmd.exe
PID 1072 wrote to memory of 1936	1072	colorcpl.exe	cmd.exe
PID 1072 wrote to memory of 1936	1072	colorcpl.exe	cmd.exe
PID 1072 wrote to memory of 284	1072	colorcpl.exe	Firefox.exe
PID 1072 wrote to memory of 284	1072	colorcpl.exe	Firefox.exe
PID 1072 wrote to memory of 284	1072	colorcpl.exe	Firefox.exe
PID 1072 wrote to memory of 284	1072	colorcpl.exe	Firefox.exe
PID 1072 wrote to memory of 284	1072	colorcpl.exe	Firefox.exe
PID 1072 wrote to memory of 1160	1072	colorcpl.exe	cmd.exe
PID 1072 wrote to memory of 1160	1072	colorcpl.exe	cmd.exe
PID 1072 wrote to memory of 1160	1072	colorcpl.exe	cmd.exe
PID 1072 wrote to memory of 1160	1072	colorcpl.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1272

C:\Users\Admin\AppData\Local\Temp\smss.exe
"C:\Users\Admin\AppData\Local\Temp\smss.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1092

C:\Users\Admin\AppData\Local\Temp\smss.exe
"C:\Users\Admin\AppData\Local\Temp\smss.exe"
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1736

C:\Windows\SysWOW64\colorcpl.exe
"C:\Windows\SysWOW64\colorcpl.exe"
2⤵
- Loads dropped DLL
- 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:1072

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\smss.exe"
3⤵
- Deletes itself
PID:1936

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:284

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:1160

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
\Users\Admin\AppData\Local\Temp\sqlite3.dll
Filesize
630KB

MD5
06b455698aba68f911c2f6d17bbefc6a

SHA1
4116e1345134012a0fc8a84b4bbf6c681621a266

SHA256
6d81a69544457d3db38f97932869e0589feed4d7249462cce7aa8b15c6c00bd2

SHA512
d64c0219933a0600702d54ca158e794b2784b1040e15d4657d87f46c091ed7ed1addcf3c46859e87c811f5c1543928596990103ae5de29a00eab7999ba7a1b3e

Download Submit
memory/1072-76-0x0000000000990000-0x0000000000A20000-memory.dmp

Filesize
576KB

Download
memory/1072-75-0x0000000000B10000-0x0000000000E13000-memory.dmp

Filesize
3.0MB

Download
memory/1072-74-0x0000000000120000-0x000000000014C000-memory.dmp

Filesize
176KB

Download
memory/1072-70-0x0000000000000000-mapping.dmp

Download
memory/1072-78-0x0000000000120000-0x000000000014C000-memory.dmp

Filesize
176KB

Download
memory/1072-73-0x0000000000F80000-0x0000000000F98000-memory.dmp

Filesize
96KB

Download
memory/1092-57-0x00000000005C0000-0x00000000005CA000-memory.dmp

Filesize
40KB

Download
memory/1092-54-0x0000000000D90000-0x0000000000E0C000-memory.dmp

Filesize
496KB

Download
memory/1092-59-0x00000000006D0000-0x0000000000702000-memory.dmp

Filesize
200KB

Download
memory/1092-58-0x0000000004DD0000-0x0000000004E3A000-memory.dmp

Filesize
424KB

Download
memory/1092-56-0x00000000005B0000-0x00000000005C6000-memory.dmp

Filesize
88KB

Download
memory/1092-55-0x00000000765C1000-0x00000000765C3000-memory.dmp

Filesize
8KB

Download
memory/1160-81-0x0000000000000000-mapping.dmp

Download
memory/1272-77-0x0000000003F60000-0x0000000004036000-memory.dmp

Filesize
856KB

Download
memory/1272-69-0x00000000070B0000-0x000000000725C000-memory.dmp

Filesize
1.7MB

Download
memory/1272-79-0x0000000003F60000-0x0000000004036000-memory.dmp

Filesize
856KB

Download
memory/1736-64-0x000000000041F840-mapping.dmp

Download
memory/1736-67-0x0000000000860000-0x0000000000B63000-memory.dmp

Filesize
3.0MB

Download
memory/1736-68-0x0000000000180000-0x0000000000191000-memory.dmp

Filesize
68KB

Download
memory/1736-66-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1736-60-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1736-61-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1736-63-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1936-72-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads