formbook | 17c2bc113099a0d8287c5aeeb76dc5386333256ca8245d2da83a8749bef1d350

General

Target

vbc (3).exe
Size

216KB
MD5

931f3ab4157f42f78cc74c3d46eb3d67
SHA1

baa093b366ba5dfac52d7611f26a1cd08aa315e2
SHA256

17c2bc113099a0d8287c5aeeb76dc5386333256ca8245d2da83a8749bef1d350
SHA512

df966e4ace266463ea38b13a06c5cd4a0753bc560a81f565434ede6483ce2cd66daa8d6b24c8a05c8783e1849c1b6f7134fbfc6d41a59096c3f9bb124d8a9012

Score

10^/10

formbook xloader zgtb loader persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

xloader

Version

2.6

Campaign

zgtb

Decoy

gabriellep.com

honghe4.xyz

anisaofrendas.com

happy-tile.com

thesulkies.com

international-ipo.com

tazeco.info

hhhzzz.xyz

vrmonster.xyz

theearthresidencia.com

sportape.xyz

elshadaibaterias.com

koredeiihibi.com

taxtaa.com

globalcityb.com

fxivcama.com

dagsmith.com

elmar-bhp.com

peakice.net

jhcdjewelry.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/1036-59-0x000000000041F1F0-mapping.dmp	xloader
behavioral1/memory/1036-58-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral1/memory/1036-61-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral1/memory/1828-69-0x00000000000F0000-0x000000000011B000-memory.dmp	xloader
behavioral1/memory/1828-73-0x00000000000F0000-0x000000000011B000-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:

msiexec.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	msiexec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\TR_TNHA8WT = "C:\\Program Files (x86)\\Jwbcdzlnp\\useronjdq.exe"	msiexec.exe

Blocklisted process makes network request 1 IoCs

Processes:

msiexec.exe

flow pid process

26 1828 msiexec.exe

flow	pid	process
26	1828	msiexec.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc (3).execvtres.exemsiexec.exe

description	pid	process	target process
PID 388 set thread context of 1036	388	vbc (3).exe	cvtres.exe
PID 1036 set thread context of 1212	1036	cvtres.exe	Explorer.EXE
PID 1828 set thread context of 1212	1828	msiexec.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

msiexec.exe

description ioc process

File opened for modification C:\Program Files (x86)\Jwbcdzlnp\useronjdq.exe msiexec.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Jwbcdzlnp\useronjdq.exe	msiexec.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

msiexec.exe

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

Suspicious behavior: EnumeratesProcesses 21 IoCs

Processes:

cvtres.exemsiexec.exe

pid	process
1036	cvtres.exe
1036	cvtres.exe
1828	msiexec.exe
1828	msiexec.exe
1828	msiexec.exe
1828	msiexec.exe
1828	msiexec.exe
1828	msiexec.exe
1828	msiexec.exe
1828	msiexec.exe
1828	msiexec.exe
1828	msiexec.exe
1828	msiexec.exe
1828	msiexec.exe
1828	msiexec.exe
1828	msiexec.exe
1828	msiexec.exe
1828	msiexec.exe
1828	msiexec.exe
1828	msiexec.exe
1828	msiexec.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

cvtres.exemsiexec.exe

pid process

1036 cvtres.exe
1036 cvtres.exe
1036 cvtres.exe
1828 msiexec.exe
1828 msiexec.exe
1828 msiexec.exe
1828 msiexec.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

cvtres.exemsiexec.exe

description pid process

Token: SeDebugPrivilege 1036 cvtres.exe
Token: SeDebugPrivilege 1828 msiexec.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	1036	cvtres.exe
Token: SeDebugPrivilege	1828	msiexec.exe

pid	process
1212	Explorer.EXE
1212	Explorer.EXE

pid	process
1212	Explorer.EXE
1212	Explorer.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

vbc (3).exeExplorer.EXEmsiexec.exe

description	pid	process	target process
PID 388 wrote to memory of 1036	388	vbc (3).exe	cvtres.exe
PID 388 wrote to memory of 1036	388	vbc (3).exe	cvtres.exe
PID 388 wrote to memory of 1036	388	vbc (3).exe	cvtres.exe
PID 388 wrote to memory of 1036	388	vbc (3).exe	cvtres.exe
PID 388 wrote to memory of 1036	388	vbc (3).exe	cvtres.exe
PID 388 wrote to memory of 1036	388	vbc (3).exe	cvtres.exe
PID 388 wrote to memory of 1036	388	vbc (3).exe	cvtres.exe
PID 1212 wrote to memory of 1828	1212	Explorer.EXE	msiexec.exe
PID 1212 wrote to memory of 1828	1212	Explorer.EXE	msiexec.exe
PID 1212 wrote to memory of 1828	1212	Explorer.EXE	msiexec.exe
PID 1212 wrote to memory of 1828	1212	Explorer.EXE	msiexec.exe
PID 1212 wrote to memory of 1828	1212	Explorer.EXE	msiexec.exe
PID 1212 wrote to memory of 1828	1212	Explorer.EXE	msiexec.exe
PID 1212 wrote to memory of 1828	1212	Explorer.EXE	msiexec.exe
PID 1828 wrote to memory of 1164	1828	msiexec.exe	cmd.exe
PID 1828 wrote to memory of 1164	1828	msiexec.exe	cmd.exe
PID 1828 wrote to memory of 1164	1828	msiexec.exe	cmd.exe
PID 1828 wrote to memory of 1164	1828	msiexec.exe	cmd.exe
PID 1828 wrote to memory of 328	1828	msiexec.exe	Firefox.exe
PID 1828 wrote to memory of 328	1828	msiexec.exe	Firefox.exe
PID 1828 wrote to memory of 328	1828	msiexec.exe	Firefox.exe
PID 1828 wrote to memory of 328	1828	msiexec.exe	Firefox.exe
PID 1828 wrote to memory of 328	1828	msiexec.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:1212

C:\Users\Admin\AppData\Local\Temp\vbc (3).exe
"C:\Users\Admin\AppData\Local\Temp\vbc (3).exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:388

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:1036

C:\Windows\SysWOW64\msiexec.exe
"C:\Windows\SysWOW64\msiexec.exe"
2⤵
- Adds policy Run key to start application
- Blocklisted process makes network request
- 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:1828

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
3⤵
PID:1164

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:328

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

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/388-54-0x0000000000230000-0x000000000026A000-memory.dmp

Filesize
232KB

Download
memory/1036-56-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1036-55-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1036-59-0x000000000041F1F0-mapping.dmp

Download
memory/1036-58-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1036-61-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/1036-62-0x0000000000890000-0x0000000000B93000-memory.dmp

Filesize
3.0MB

Download
memory/1036-63-0x0000000000180000-0x0000000000191000-memory.dmp

Filesize
68KB

Download
memory/1164-67-0x0000000000000000-mapping.dmp

Download
memory/1212-64-0x0000000004C00000-0x0000000004D08000-memory.dmp

Filesize
1.0MB

Download
memory/1212-72-0x0000000004D10000-0x0000000004E6B000-memory.dmp

Filesize
1.4MB

Download
memory/1212-74-0x0000000004D10000-0x0000000004E6B000-memory.dmp

Filesize
1.4MB

Download
memory/1828-66-0x0000000075AE1000-0x0000000075AE3000-memory.dmp

Filesize
8KB

Download
memory/1828-65-0x0000000000000000-mapping.dmp

Download
memory/1828-68-0x00000000007C0000-0x00000000007D4000-memory.dmp

Filesize
80KB

Download
memory/1828-69-0x00000000000F0000-0x000000000011B000-memory.dmp

Filesize
172KB

Download
memory/1828-70-0x00000000021D0000-0x00000000024D3000-memory.dmp

Filesize
3.0MB

Download
memory/1828-71-0x00000000004F0000-0x0000000000580000-memory.dmp

Filesize
576KB

Download
memory/1828-73-0x00000000000F0000-0x000000000011B000-memory.dmp

Filesize
172KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads