formbook | e25ea6eb167727e93ddf4162cdf8fd9f8b974c6ae6195d743b578cadcc17301a

General

Target

89978171.exe
Size

396KB
MD5

11a4392746dabb7901c50a6b26975864
SHA1

e6fc492cc3d3c64535de5a794b0103b6521b271e
SHA256

e25ea6eb167727e93ddf4162cdf8fd9f8b974c6ae6195d743b578cadcc17301a
SHA512

3436d712600572590da454ff76e72aaa49d2b552bd759f4b9c4600219372a4bc7f7c74982867b217ebb9c90c991b0ef222c066fc97e6a26fa9af70d3a23c7331

Score

10^/10

formbook xloader tn61 loader persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

xloader

Version

2.6

Campaign

tn61

Decoy

ryliehorrall.art

mesdco.net

street-art-ink.com

sepetcin.com

stilghar.com

hawaiipooltiles.com

fuerst-von-falkennest.com

totalvirtue.com

xdk0blc0tqy6a7.life

zootowngravel.com

kreditkarten-optionde.com

6888tlbb.xyz

albertakleekai.com

travelnurseinfofinder3.life

valleyinnswat.com

secure-remove-devices.com

digitalswamy.com

www112casinova.com

medifasttrd.com

distritoxermar.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 5 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1796-60-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral1/memory/1796-61-0x000000000041F2C0-mapping.dmp	xloader
behavioral1/memory/1796-63-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral1/memory/1240-71-0x0000000000090000-0x00000000000BB000-memory.dmp	xloader
behavioral1/memory/1240-75-0x0000000000090000-0x00000000000BB000-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:

rundll32.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\JHLTQVAHYJP = "C:\\Program Files (x86)\\Torx\\chkdsk2d3duf.exe"	rundll32.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:

89978171.execvtres.exerundll32.exe

description	pid	process	target process
PID 1972 set thread context of 1796	1972	89978171.exe	cvtres.exe
PID 1796 set thread context of 1220	1796	cvtres.exe	Explorer.EXE
PID 1240 set thread context of 1220	1240	rundll32.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File opened for modification C:\Program Files (x86)\Torx\chkdsk2d3duf.exe rundll32.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Torx\chkdsk2d3duf.exe	rundll32.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

rundll32.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-1083475884-596052423-1669053738-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	rundll32.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

cvtres.exerundll32.exe

pid	process
1796	cvtres.exe
1796	cvtres.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe
1240	rundll32.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

cvtres.exerundll32.exe

pid process

1796 cvtres.exe
1796 cvtres.exe
1796 cvtres.exe
1240 rundll32.exe
1240 rundll32.exe
1240 rundll32.exe
1240 rundll32.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

cvtres.exerundll32.exe

description pid process

Token: SeDebugPrivilege 1796 cvtres.exe
Token: SeDebugPrivilege 1240 rundll32.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1220 Explorer.EXE
1220 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1220 Explorer.EXE
1220 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1796	cvtres.exe
Token: SeDebugPrivilege	1240	rundll32.exe

pid	process
1220	Explorer.EXE
1220	Explorer.EXE

pid	process
1220	Explorer.EXE
1220	Explorer.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

89978171.exeExplorer.EXErundll32.exe

description	pid	process	target process
PID 1972 wrote to memory of 1796	1972	89978171.exe	cvtres.exe
PID 1972 wrote to memory of 1796	1972	89978171.exe	cvtres.exe
PID 1972 wrote to memory of 1796	1972	89978171.exe	cvtres.exe
PID 1972 wrote to memory of 1796	1972	89978171.exe	cvtres.exe
PID 1972 wrote to memory of 1796	1972	89978171.exe	cvtres.exe
PID 1972 wrote to memory of 1796	1972	89978171.exe	cvtres.exe
PID 1972 wrote to memory of 1796	1972	89978171.exe	cvtres.exe
PID 1220 wrote to memory of 1240	1220	Explorer.EXE	rundll32.exe
PID 1220 wrote to memory of 1240	1220	Explorer.EXE	rundll32.exe
PID 1220 wrote to memory of 1240	1220	Explorer.EXE	rundll32.exe
PID 1220 wrote to memory of 1240	1220	Explorer.EXE	rundll32.exe
PID 1220 wrote to memory of 1240	1220	Explorer.EXE	rundll32.exe
PID 1220 wrote to memory of 1240	1220	Explorer.EXE	rundll32.exe
PID 1220 wrote to memory of 1240	1220	Explorer.EXE	rundll32.exe
PID 1240 wrote to memory of 964	1240	rundll32.exe	cmd.exe
PID 1240 wrote to memory of 964	1240	rundll32.exe	cmd.exe
PID 1240 wrote to memory of 964	1240	rundll32.exe	cmd.exe
PID 1240 wrote to memory of 964	1240	rundll32.exe	cmd.exe
PID 1240 wrote to memory of 428	1240	rundll32.exe	Firefox.exe
PID 1240 wrote to memory of 428	1240	rundll32.exe	Firefox.exe
PID 1240 wrote to memory of 428	1240	rundll32.exe	Firefox.exe
PID 1240 wrote to memory of 428	1240	rundll32.exe	Firefox.exe
PID 1240 wrote to memory of 428	1240	rundll32.exe	Firefox.exe

System policy modification 1 TTPs 1 IoCs
evasion

Modify Registry
T1112

Processes:

rundll32.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer rundll32.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	rundll32.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1220

C:\Users\Admin\AppData\Local\Temp\89978171.exe
"C:\Users\Admin\AppData\Local\Temp\89978171.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1972

C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1796

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\SysWOW64\rundll32.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
- System policy modification
PID:1240

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
3⤵
PID:964

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:428

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

3

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

memory/964-69-0x0000000000000000-mapping.dmp

Download
memory/1220-76-0x0000000005DD0000-0x0000000005EA7000-memory.dmp

Filesize
860KB

Download
memory/1220-74-0x0000000005DD0000-0x0000000005EA7000-memory.dmp

Filesize
860KB

Download
memory/1220-66-0x0000000003B90000-0x0000000003CCE000-memory.dmp

Filesize
1.2MB

Download
memory/1240-67-0x0000000000000000-mapping.dmp

Download
memory/1240-75-0x0000000000090000-0x00000000000BB000-memory.dmp

Filesize
172KB

Download
memory/1240-73-0x0000000000790000-0x0000000000820000-memory.dmp

Filesize
576KB

Download
memory/1240-72-0x0000000001FB0000-0x00000000022B3000-memory.dmp

Filesize
3.0MB

Download
memory/1240-71-0x0000000000090000-0x00000000000BB000-memory.dmp

Filesize
172KB

Download
memory/1240-70-0x0000000000840000-0x000000000084E000-memory.dmp

Filesize
56KB

Download
memory/1240-68-0x0000000075F21000-0x0000000075F23000-memory.dmp

Filesize
8KB

Download
memory/1796-60-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1796-64-0x0000000000CF0000-0x0000000000FF3000-memory.dmp

Filesize
3.0MB

Download
memory/1796-65-0x0000000000180000-0x0000000000191000-memory.dmp

Filesize
68KB

Download
memory/1796-63-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1796-61-0x000000000041F2C0-mapping.dmp

Download
memory/1796-58-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1796-57-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1972-54-0x0000000000960000-0x00000000009C6000-memory.dmp

Filesize
408KB

Download
memory/1972-56-0x0000000000480000-0x00000000004B4000-memory.dmp

Filesize
208KB

Download
memory/1972-55-0x00000000004B0000-0x00000000004E4000-memory.dmp

Filesize
208KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads