xloader | a50394b33bb3fcf6c7413c2d5ba949329430d46b8e8870a9e26b8c65abd8598d

General

Target

file.exe
Size

207KB
MD5

849068f05dc88d85058a3097c1679248
SHA1

072f1feb4eda0ef732007d5e0c783738e3803ca4
SHA256

a50394b33bb3fcf6c7413c2d5ba949329430d46b8e8870a9e26b8c65abd8598d
SHA512

83e55e4807dcb18eacede1999014f977324eb217e5de556c7c2537ccb1c95f00fbd1285a1a9cc406934ee485d6c55ec20e579d7117c1f908991b251456b068bf

Score

10^/10

xloader loader rat

Malware Config

Extracted

Family

xloader

Version

2.3

C2

http://www.citestaccnt1597666144.com/ud9e/

Decoy

casezs.com

gascubby.com

pekodains.com

superskosh.com

avktinfracon.com

slink.finance

thegreathopeofearth.com

thebattleofthestars.com

utmxpxq.icu

mamaandbabycleaningservice.com

officialtimelessbeauty.com

keeper.network

leyingcp.com

helpforharrysheroes.com

cohenforleehealthboard.com

wsilhavy.net

logisticsconsultinglimited.com

btechnician.com

dynamicpersiankitten.com

nuplaz.com

Signatures

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

Xloader Payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1468-117-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral2/memory/3520-125-0x0000000000850000-0x0000000000879000-memory.dmp	xloader

Loads dropped DLL 1 IoCs

Processes:

file.exe

pid process

1736 file.exe

pid	process
1736	file.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

file.exefile.exechkdsk.exe

description	pid	process	target process
PID 1736 set thread context of 1468	1736	file.exe	file.exe
PID 1468 set thread context of 3052	1468	file.exe	Explorer.EXE
PID 1468 set thread context of 3052	1468	file.exe	Explorer.EXE
PID 3520 set thread context of 3052	3520	chkdsk.exe	Explorer.EXE

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

chkdsk.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier chkdsk.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 62 IoCs

Processes:

file.exechkdsk.exe

pid	process
1468	file.exe
1468	file.exe
1468	file.exe
1468	file.exe
1468	file.exe
1468	file.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe
3520	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3052 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

file.exefile.exechkdsk.exe

pid process

1736 file.exe
1468 file.exe
1468 file.exe
1468 file.exe
1468 file.exe
3520 chkdsk.exe
3520 chkdsk.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

file.exechkdsk.exe

description pid process

Token: SeDebugPrivilege 1468 file.exe
Token: SeDebugPrivilege 3520 chkdsk.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Explorer.EXE

pid process

3052 Explorer.EXE
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Explorer.EXE

pid process

3052 Explorer.EXE

pid	process
3052	Explorer.EXE

pid	process
1736	file.exe
1468	file.exe
1468	file.exe
1468	file.exe
1468	file.exe
3520	chkdsk.exe
3520	chkdsk.exe

description	pid	process
Token: SeDebugPrivilege	1468	file.exe
Token: SeDebugPrivilege	3520	chkdsk.exe

pid	process
3052	Explorer.EXE

pid	process
3052	Explorer.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

file.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 1736 wrote to memory of 1468	1736	file.exe	file.exe
PID 1736 wrote to memory of 1468	1736	file.exe	file.exe
PID 1736 wrote to memory of 1468	1736	file.exe	file.exe
PID 1736 wrote to memory of 1468	1736	file.exe	file.exe
PID 3052 wrote to memory of 3520	3052	Explorer.EXE	chkdsk.exe
PID 3052 wrote to memory of 3520	3052	Explorer.EXE	chkdsk.exe
PID 3052 wrote to memory of 3520	3052	Explorer.EXE	chkdsk.exe
PID 3520 wrote to memory of 2264	3520	chkdsk.exe	cmd.exe
PID 3520 wrote to memory of 2264	3520	chkdsk.exe	cmd.exe
PID 3520 wrote to memory of 2264	3520	chkdsk.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:3052

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1736

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1468

C:\Windows\SysWOW64\autoconv.exe
"C:\Windows\SysWOW64\autoconv.exe"
2⤵
PID:1816

C:\Windows\SysWOW64\autoconv.exe
"C:\Windows\SysWOW64\autoconv.exe"
2⤵
PID:1916

C:\Windows\SysWOW64\autoconv.exe
"C:\Windows\SysWOW64\autoconv.exe"
2⤵
PID:1824

C:\Windows\SysWOW64\autoconv.exe
"C:\Windows\SysWOW64\autoconv.exe"
2⤵
PID:1912

C:\Windows\SysWOW64\chkdsk.exe
"C:\Windows\SysWOW64\chkdsk.exe"
2⤵
- Suspicious use of SetThreadContext
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3520

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\file.exe"
3⤵
PID:2264

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Local\Temp\nsi1024.tmp\mc43.dll

MD5
d88c8fbddb7b7fb0589f0af4f75cb83c

SHA1
a4e0d0662e4a6723d1d0f62df4c29e62fcc318b2

SHA256
ddb760b4794d7d60c1324768d4d5271a5c3532eff72f219832105a6de798f2b7

SHA512
fef9ae08638481178ae24bc982e3d6cf9657bd9b062daafae904a01b923013e83bd59589f93618d8a809acc7d6a7dafcebb4e14e82aa750bb34b6c4a28b9294b

Download Submit
memory/1468-121-0x00000000006F0000-0x0000000000700000-memory.dmp

Filesize
64KB

Download
memory/1468-118-0x0000000000600000-0x0000000000610000-memory.dmp

Filesize
64KB

Download
memory/1468-119-0x0000000000B80000-0x0000000000EA0000-memory.dmp

Filesize
3.1MB

Download
memory/1468-117-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/1468-116-0x000000000041D110-mapping.dmp

Download
memory/1736-115-0x00000000030B0000-0x00000000030B2000-memory.dmp

Filesize
8KB

Download
memory/2264-126-0x0000000000000000-mapping.dmp

Download
memory/3052-120-0x0000000004FD0000-0x0000000005145000-memory.dmp

Filesize
1.5MB

Download
memory/3052-122-0x0000000002AD0000-0x0000000002BBC000-memory.dmp

Filesize
944KB

Download
memory/3052-129-0x0000000005150000-0x0000000005210000-memory.dmp

Filesize
768KB

Download
memory/3520-123-0x0000000000000000-mapping.dmp

Download
memory/3520-124-0x0000000000950000-0x000000000095A000-memory.dmp

Filesize
40KB

Download
memory/3520-127-0x0000000004C00000-0x0000000004CAE000-memory.dmp

Filesize
696KB

Download
memory/3520-128-0x0000000004FB0000-0x000000000503F000-memory.dmp

Filesize
572KB

Download
memory/3520-125-0x0000000000850000-0x0000000000879000-memory.dmp

Filesize
164KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads