formbook | 1276c85709b33cafab4e0079f409ea0c83e41d97e30dcc50a11cce385f10d62e

General

Target

PO389732.exe
Size

325KB
MD5

4cd3bc98fa3df22248c7e5d63dbe1168
SHA1

fb32e85f940945c6c0d3052b80f48f5bc48f7c7d
SHA256

cde5b9157162c55139f508884d7be6be903acc9d85842a667c1b2ef04a1ecd49
SHA512

0b2d2ada876da8ae777b80f2b99895b62449052e723ef5c6a71d02c317dc6c34346f1a35ea875149f2ebd94b775a7b8e3f2e712e2765e0e2fe82c2ec7376896e

Score

10^/10

formbook xloader b6fg loader persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

xloader

Version

2.0

Campaign

b6fg

Decoy

multlockmt5.com

mohajrannoor.com

robynhoodofretail.info

belinv.com

hotellasab.com

kibrismosad.com

xn--fxwm39aeb590h.xn--io0a7i

resetbrasil.com

tcsonhvac.com

theresav.net

bohoqi.info

machinafuturae.com

mambavault.com

xn--980am9a.top

yumiang.com

evntmonitor.com

83003kk.com

triterm.com

8800pe.com

silvanstudio.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 3 IoCs

rat

Processes:

resource	yara_rule
behavioral3/memory/1208-61-0x0000000000400000-0x0000000000427000-memory.dmp	xloader
behavioral3/memory/1208-62-0x000000000041C160-mapping.dmp	xloader
behavioral3/memory/1300-71-0x0000000000090000-0x00000000000B7000-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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\JHD0HZNHUBP = "C:\\Program Files (x86)\\Box4dufwh\\gdihh1pnnn.exe"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	rundll32.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

904 cmd.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
904	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

PO389732.exePO389732.exerundll32.exe

description	pid	process	target process
PID 548 set thread context of 1208	548	PO389732.exe	PO389732.exe
PID 1208 set thread context of 1212	1208	PO389732.exe	Explorer.EXE
PID 1300 set thread context of 1212	1300	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)\Box4dufwh\gdihh1pnnn.exe rundll32.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Box4dufwh\gdihh1pnnn.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-1-5-21-1819626980-2277161760-1023733287-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	rundll32.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

Processes:

PO389732.exerundll32.exe

pid	process
1208	PO389732.exe
1208	PO389732.exe
1300	rundll32.exe
1300	rundll32.exe
1300	rundll32.exe
1300	rundll32.exe
1300	rundll32.exe
1300	rundll32.exe
1300	rundll32.exe
1300	rundll32.exe
1300	rundll32.exe
1300	rundll32.exe
1300	rundll32.exe
1300	rundll32.exe
1300	rundll32.exe
1300	rundll32.exe
1300	rundll32.exe
1300	rundll32.exe
1300	rundll32.exe
1300	rundll32.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

PO389732.exerundll32.exe

pid process

1208 PO389732.exe
1208 PO389732.exe
1208 PO389732.exe
1300 rundll32.exe
1300 rundll32.exe
1300 rundll32.exe
1300 rundll32.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

PO389732.exerundll32.exe

description pid process

Token: SeDebugPrivilege 1208 PO389732.exe
Token: SeDebugPrivilege 1300 rundll32.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1212 Explorer.EXE
1212 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1212 Explorer.EXE
1212 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1208	PO389732.exe
Token: SeDebugPrivilege	1300	rundll32.exe

pid	process
1212	Explorer.EXE
1212	Explorer.EXE

pid	process
1212	Explorer.EXE
1212	Explorer.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

PO389732.exeExplorer.EXErundll32.exe

description	pid	process	target process
PID 548 wrote to memory of 1208	548	PO389732.exe	PO389732.exe
PID 548 wrote to memory of 1208	548	PO389732.exe	PO389732.exe
PID 548 wrote to memory of 1208	548	PO389732.exe	PO389732.exe
PID 548 wrote to memory of 1208	548	PO389732.exe	PO389732.exe
PID 548 wrote to memory of 1208	548	PO389732.exe	PO389732.exe
PID 548 wrote to memory of 1208	548	PO389732.exe	PO389732.exe
PID 548 wrote to memory of 1208	548	PO389732.exe	PO389732.exe
PID 1212 wrote to memory of 1300	1212	Explorer.EXE	rundll32.exe
PID 1212 wrote to memory of 1300	1212	Explorer.EXE	rundll32.exe
PID 1212 wrote to memory of 1300	1212	Explorer.EXE	rundll32.exe
PID 1212 wrote to memory of 1300	1212	Explorer.EXE	rundll32.exe
PID 1212 wrote to memory of 1300	1212	Explorer.EXE	rundll32.exe
PID 1212 wrote to memory of 1300	1212	Explorer.EXE	rundll32.exe
PID 1212 wrote to memory of 1300	1212	Explorer.EXE	rundll32.exe
PID 1300 wrote to memory of 904	1300	rundll32.exe	cmd.exe
PID 1300 wrote to memory of 904	1300	rundll32.exe	cmd.exe
PID 1300 wrote to memory of 904	1300	rundll32.exe	cmd.exe
PID 1300 wrote to memory of 904	1300	rundll32.exe	cmd.exe
PID 1300 wrote to memory of 836	1300	rundll32.exe	Firefox.exe
PID 1300 wrote to memory of 836	1300	rundll32.exe	Firefox.exe
PID 1300 wrote to memory of 836	1300	rundll32.exe	Firefox.exe
PID 1300 wrote to memory of 836	1300	rundll32.exe	Firefox.exe
PID 1300 wrote to memory of 836	1300	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:1212

C:\Users\Admin\AppData\Local\Temp\PO389732.exe
"C:\Users\Admin\AppData\Local\Temp\PO389732.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:548

C:\Users\Admin\AppData\Local\Temp\PO389732.exe
"{path}"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1208

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:1300

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\PO389732.exe"
3⤵
- Deletes itself
PID:904

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:836

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

Replay Monitor

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Downloads

memory/548-55-0x0000000076181000-0x0000000076183000-memory.dmp

Filesize
8KB

Download
memory/548-56-0x0000000000310000-0x0000000000320000-memory.dmp

Filesize
64KB

Download
memory/548-57-0x00000000007E0000-0x0000000000816000-memory.dmp

Filesize
216KB

Download
memory/548-54-0x0000000000380000-0x00000000003D8000-memory.dmp

Filesize
352KB

Download
memory/904-69-0x0000000000000000-mapping.dmp

Download
memory/1208-58-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1208-61-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1208-62-0x000000000041C160-mapping.dmp

Download
memory/1208-64-0x0000000000870000-0x0000000000B73000-memory.dmp

Filesize
3.0MB

Download
memory/1208-65-0x0000000000080000-0x0000000000090000-memory.dmp

Filesize
64KB

Download
memory/1208-59-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1212-66-0x0000000002A40000-0x0000000002B13000-memory.dmp

Filesize
844KB

Download
memory/1212-74-0x0000000005F40000-0x0000000006040000-memory.dmp

Filesize
1024KB

Download
memory/1300-67-0x0000000000000000-mapping.dmp

Download
memory/1300-70-0x0000000000F70000-0x0000000000F7E000-memory.dmp

Filesize
56KB

Download
memory/1300-71-0x0000000000090000-0x00000000000B7000-memory.dmp

Filesize
156KB

Download
memory/1300-72-0x0000000002380000-0x0000000002683000-memory.dmp

Filesize
3.0MB

Download
memory/1300-73-0x00000000002F0000-0x000000000037F000-memory.dmp

Filesize
572KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads