xloader | 8b30c3dba5f91a0eaa18d015d280e7359c391a62e0c54d2767aacd4021bb0f49

General

Target

i.exe
Size

176KB
MD5

cf7e4b1359cf6fbb7c8e883b1ee47834
SHA1

dbc0dd45c18f52b8971cbfa048f3628ced249a66
SHA256

8b30c3dba5f91a0eaa18d015d280e7359c391a62e0c54d2767aacd4021bb0f49
SHA512

6f095d77f33777ac6c9dafbfba265c0ee7dc94a8b7223b6272da327e53429a7710b77b7e33e2601aa507c8451c3acd373c5ebe7aca3ba4a16d152eb13650d378
SSDEEP

3072:hYk/2miv7IOFYhWErUKJopFTvbNDjgSDh48q/oZPcQIeixw4mOuPwb5em+D2x:r4NFY5UKyTvJDj7F48q/GIea8B2x

Score

10^/10

xloader zzun loader persistence rat

Malware Config

Extracted

Family

xloader

Version

2.9

Campaign

zzun

Decoy

JnNtRHyNupy0GqRzAcasu7hb4rc=

Qv593NGLE7p9UNSaVkPXljAJm2QCNnc=

ePArIFWvjkkMgVEVhw4M4Jk=

26rqUwJ7dD0AiDI=

pBAxMHeK741QFw==

kHD7TPt5846pUMTX

56UnjFjHL1i0j659h3LymRnHpQj+SshC

4vKlKHflPqmWXRbrRwfPtrhb4rc=

6LBd4qButFAi

phMzGll8Ue7Fu+inq5cdnPaSugG3

NKswiQGCvZoG5FgsdHEI

rtTHnuUY8M1qVcXV

SOmECrlAt2oGAA==

L1ep9adutFAi

/UE+/AyvE6uEl28weFI=

IP+xMPQxJR4NE6TK

xvW5GN9/rqA5YUoOVt185Sf7Uw==

fRFNW9DhxL6VF7LA

KFYTfkaY741QFw==

W4JGvMBmt2oGAA==

Signatures

Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader

Xloader payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/836-61-0x0000000000090000-0x00000000000BC000-memory.dmp	xloader
behavioral1/memory/836-64-0x0000000000090000-0x00000000000BC000-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:

i.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Control Panel\International\Geo\Nation i.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1728 cmd.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Control Panel\International\Geo\Nation	i.exe

pid	process
1728	cmd.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wuapp.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	wuapp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\LNUPD = "C:\\Program Files (x86)\\Xgdyljnbp\\update7nihzln0.exe"	wuapp.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

i.exewuapp.exe

description	pid	process	target process
PID 1832 set thread context of 1384	1832	i.exe	Explorer.EXE
PID 836 set thread context of 1384	836	wuapp.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

wuapp.exe

description ioc process

File opened for modification C:\Program Files (x86)\Xgdyljnbp\update7nihzln0.exe wuapp.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Xgdyljnbp\update7nihzln0.exe	wuapp.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

wuapp.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-3845472200-3839195424-595303356-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	wuapp.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

Processes:

i.exewuapp.exe

pid	process
1832	i.exe
1832	i.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe
836	wuapp.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

i.exewuapp.exe

pid process

1832 i.exe
1832 i.exe
1832 i.exe
836 wuapp.exe
836 wuapp.exe
836 wuapp.exe
836 wuapp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

i.exewuapp.exe

description pid process

Token: SeDebugPrivilege 1832 i.exe
Token: SeDebugPrivilege 836 wuapp.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1384 Explorer.EXE
1384 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1384 Explorer.EXE
1384 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1832	i.exe
Token: SeDebugPrivilege	836	wuapp.exe

pid	process
1384	Explorer.EXE
1384	Explorer.EXE

pid	process
1384	Explorer.EXE
1384	Explorer.EXE

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

Explorer.EXEwuapp.exe

description	pid	process	target process
PID 1384 wrote to memory of 836	1384	Explorer.EXE	wuapp.exe
PID 1384 wrote to memory of 836	1384	Explorer.EXE	wuapp.exe
PID 1384 wrote to memory of 836	1384	Explorer.EXE	wuapp.exe
PID 1384 wrote to memory of 836	1384	Explorer.EXE	wuapp.exe
PID 1384 wrote to memory of 836	1384	Explorer.EXE	wuapp.exe
PID 1384 wrote to memory of 836	1384	Explorer.EXE	wuapp.exe
PID 1384 wrote to memory of 836	1384	Explorer.EXE	wuapp.exe
PID 836 wrote to memory of 1728	836	wuapp.exe	cmd.exe
PID 836 wrote to memory of 1728	836	wuapp.exe	cmd.exe
PID 836 wrote to memory of 1728	836	wuapp.exe	cmd.exe
PID 836 wrote to memory of 1728	836	wuapp.exe	cmd.exe
PID 836 wrote to memory of 828	836	wuapp.exe	Firefox.exe
PID 836 wrote to memory of 828	836	wuapp.exe	Firefox.exe
PID 836 wrote to memory of 828	836	wuapp.exe	Firefox.exe
PID 836 wrote to memory of 828	836	wuapp.exe	Firefox.exe
PID 836 wrote to memory of 828	836	wuapp.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:1384

C:\Users\Admin\AppData\Local\Temp\i.exe
"C:\Users\Admin\AppData\Local\Temp\i.exe"
2⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1832

C:\Windows\SysWOW64\wuapp.exe
"C:\Windows\SysWOW64\wuapp.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:836

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\i.exe"
3⤵
- Deletes itself
PID:1728

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:828

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

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/836-60-0x0000000000C60000-0x0000000000F63000-memory.dmp

Filesize
3.0MB

Download
memory/836-57-0x0000000000000000-mapping.dmp

Download
memory/836-59-0x0000000001000000-0x000000000100B000-memory.dmp

Filesize
44KB

Download
memory/836-61-0x0000000000090000-0x00000000000BC000-memory.dmp

Filesize
176KB

Download
memory/836-62-0x00000000005C0000-0x0000000000650000-memory.dmp

Filesize
576KB

Download
memory/836-64-0x0000000000090000-0x00000000000BC000-memory.dmp

Filesize
176KB

Download
memory/836-66-0x0000000076401000-0x0000000076403000-memory.dmp

Filesize
8KB

Download
memory/1384-56-0x0000000006360000-0x0000000006442000-memory.dmp

Filesize
904KB

Download
memory/1384-63-0x0000000006980000-0x0000000006AE4000-memory.dmp

Filesize
1.4MB

Download
memory/1384-65-0x0000000006980000-0x0000000006AE4000-memory.dmp

Filesize
1.4MB

Download
memory/1728-58-0x0000000000000000-mapping.dmp

Download
memory/1832-55-0x0000000000130000-0x0000000000141000-memory.dmp

Filesize
68KB

Download
memory/1832-54-0x00000000008D0000-0x0000000000BD3000-memory.dmp

Filesize
3.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads