formbook | db4c0badc999b10f0dae3d1d80b59c3748de2f6f913fb7bff2d9303e4396a1b4

General

Target

Drawing Image PDF.exe
Size

713KB
MD5

d7ce2f78a17847431c921087487a8b91
SHA1

3a2b899ebfdac8a82b66bd95c4838162e066672e
SHA256

db4c0badc999b10f0dae3d1d80b59c3748de2f6f913fb7bff2d9303e4396a1b4
SHA512

519fd6855a7a22e42e363955593c108d498b2528dd8d3bc2bff2eaf7236be4af83d14c2c3cb90a347ce851286ac3859322cba7e8fed84e4873be29547223f47c

Score

10^/10

formbook xloader k25e loader persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

xloader

Version

2.9

Campaign

k25e

Decoy

Xvh6mA98aHhdW5PD

XpSglwzNIOqe9g==

RWuFLgQ7oCzN4U/2/A==

nf6FGPYyk+veLC0=

FnN4A9ALIOqe9g==

kcXTjYT8eRm8DQOuLW8mYOG8eN8=

yryblm3yv9iO+HZOTbxhSw/FtNcRng==

ZRazQ2DW84uiZaiw6w==

Is1fie9gWoUuX+Czzuk=

lV9ffbe7SO6B

Pj79m1gaBi8Fajo=

tTdnWml24M1Y4Q==

Zq3U8oC/5/SW

l2f5LrEsED3jSoYw/zoy2Q==

oM3TbW/saRS2N3Yqzi31mZoiw9go9Ck=

AyPthJYMGC4dRr3a

uJNV6qnUOsB4lGP6oRHjc00=

09OYj9e/5/SW

9UFZgN4YDzDkQTvg4KFqn2facZ19aGuv

F5PHzC1g0IBdW5PD

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/1228-62-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/1228-63-0x000000000041F680-mapping.dmp	xloader
behavioral1/memory/1228-65-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/1744-71-0x00000000001D0000-0x00000000001FC000-memory.dmp	xloader
behavioral1/memory/1744-76-0x00000000001D0000-0x00000000001FC000-memory.dmp	xloader

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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

cscript.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	cscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\LRJ8IL4XCN = "C:\\Program Files (x86)\\Nhbwt\\userpbc.exe"	cscript.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

Drawing Image PDF.exeRegSvcs.execscript.exe

description	pid	process	target process
PID 948 set thread context of 1228	948	Drawing Image PDF.exe	RegSvcs.exe
PID 1228 set thread context of 1256	1228	RegSvcs.exe	Explorer.EXE
PID 1744 set thread context of 1256	1744	cscript.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

cscript.exe

description ioc process

File opened for modification C:\Program Files (x86)\Nhbwt\userpbc.exe cscript.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	ioc	process
File opened for modification	C:\Program Files (x86)\Nhbwt\userpbc.exe	cscript.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

cscript.exe

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

Suspicious behavior: EnumeratesProcesses 21 IoCs

Processes:

RegSvcs.execscript.exe

pid	process
1228	RegSvcs.exe
1228	RegSvcs.exe
1744	cscript.exe
1744	cscript.exe
1744	cscript.exe
1744	cscript.exe
1744	cscript.exe
1744	cscript.exe
1744	cscript.exe
1744	cscript.exe
1744	cscript.exe
1744	cscript.exe
1744	cscript.exe
1744	cscript.exe
1744	cscript.exe
1744	cscript.exe
1744	cscript.exe
1744	cscript.exe
1744	cscript.exe
1744	cscript.exe
1744	cscript.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

RegSvcs.execscript.exe

pid process

1228 RegSvcs.exe
1228 RegSvcs.exe
1228 RegSvcs.exe
1744 cscript.exe
1744 cscript.exe
1744 cscript.exe
1744 cscript.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

RegSvcs.execscript.exe

description pid process

Token: SeDebugPrivilege 1228 RegSvcs.exe
Token: SeDebugPrivilege 1744 cscript.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1256 Explorer.EXE
1256 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1256 Explorer.EXE
1256 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1228	RegSvcs.exe
Token: SeDebugPrivilege	1744	cscript.exe

pid	process
1256	Explorer.EXE
1256	Explorer.EXE

pid	process
1256	Explorer.EXE
1256	Explorer.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

Drawing Image PDF.exeExplorer.EXEcscript.exe

description	pid	process	target process
PID 948 wrote to memory of 1228	948	Drawing Image PDF.exe	RegSvcs.exe
PID 948 wrote to memory of 1228	948	Drawing Image PDF.exe	RegSvcs.exe
PID 948 wrote to memory of 1228	948	Drawing Image PDF.exe	RegSvcs.exe
PID 948 wrote to memory of 1228	948	Drawing Image PDF.exe	RegSvcs.exe
PID 948 wrote to memory of 1228	948	Drawing Image PDF.exe	RegSvcs.exe
PID 948 wrote to memory of 1228	948	Drawing Image PDF.exe	RegSvcs.exe
PID 948 wrote to memory of 1228	948	Drawing Image PDF.exe	RegSvcs.exe
PID 948 wrote to memory of 1228	948	Drawing Image PDF.exe	RegSvcs.exe
PID 948 wrote to memory of 1228	948	Drawing Image PDF.exe	RegSvcs.exe
PID 948 wrote to memory of 1228	948	Drawing Image PDF.exe	RegSvcs.exe
PID 1256 wrote to memory of 1744	1256	Explorer.EXE	cscript.exe
PID 1256 wrote to memory of 1744	1256	Explorer.EXE	cscript.exe
PID 1256 wrote to memory of 1744	1256	Explorer.EXE	cscript.exe
PID 1256 wrote to memory of 1744	1256	Explorer.EXE	cscript.exe
PID 1744 wrote to memory of 708	1744	cscript.exe	cmd.exe
PID 1744 wrote to memory of 708	1744	cscript.exe	cmd.exe
PID 1744 wrote to memory of 708	1744	cscript.exe	cmd.exe
PID 1744 wrote to memory of 708	1744	cscript.exe	cmd.exe
PID 1744 wrote to memory of 1740	1744	cscript.exe	Firefox.exe
PID 1744 wrote to memory of 1740	1744	cscript.exe	Firefox.exe
PID 1744 wrote to memory of 1740	1744	cscript.exe	Firefox.exe
PID 1744 wrote to memory of 1740	1744	cscript.exe	Firefox.exe
PID 1744 wrote to memory of 1740	1744	cscript.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1256

C:\Users\Admin\AppData\Local\Temp\Drawing Image PDF.exe
"C:\Users\Admin\AppData\Local\Temp\Drawing Image PDF.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:948

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
"{path}"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1228

C:\Windows\SysWOW64\cscript.exe
"C:\Windows\SysWOW64\cscript.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:1744

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
3⤵
PID:708

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1740

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

memory/708-72-0x0000000000000000-mapping.dmp

Download
memory/948-54-0x0000000000F90000-0x0000000001048000-memory.dmp

Filesize
736KB

Download
memory/948-55-0x0000000075DF1000-0x0000000075DF3000-memory.dmp

Filesize
8KB

Download
memory/948-56-0x0000000000540000-0x000000000054A000-memory.dmp

Filesize
40KB

Download
memory/948-57-0x0000000005410000-0x0000000005494000-memory.dmp

Filesize
528KB

Download
memory/948-58-0x00000000005B0000-0x00000000005E2000-memory.dmp

Filesize
200KB

Download
memory/1228-66-0x00000000008A0000-0x0000000000BA3000-memory.dmp

Filesize
3.0MB

Download
memory/1228-59-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1228-63-0x000000000041F680-mapping.dmp

Download
memory/1228-65-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1228-60-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1228-67-0x0000000000220000-0x0000000000231000-memory.dmp

Filesize
68KB

Download
memory/1228-62-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1256-68-0x0000000006600000-0x00000000066E7000-memory.dmp

Filesize
924KB

Download
memory/1256-75-0x00000000068D0000-0x00000000069CA000-memory.dmp

Filesize
1000KB

Download
memory/1256-77-0x00000000068D0000-0x00000000069CA000-memory.dmp

Filesize
1000KB

Download
memory/1744-69-0x0000000000000000-mapping.dmp

Download
memory/1744-70-0x00000000002B0000-0x00000000002D2000-memory.dmp

Filesize
136KB

Download
memory/1744-71-0x00000000001D0000-0x00000000001FC000-memory.dmp

Filesize
176KB

Download
memory/1744-73-0x0000000001F90000-0x0000000002293000-memory.dmp

Filesize
3.0MB

Download
memory/1744-74-0x00000000004A0000-0x0000000000530000-memory.dmp

Filesize
576KB

Download
memory/1744-76-0x00000000001D0000-0x00000000001FC000-memory.dmp

Filesize
176KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads