xloader | 95265cd9d3be6a02382744a140d2fc7ef6dd5fbfec0c03acb0e37c49192d3f35

General

Target

SEGU9670620.exe
Size

708KB
MD5

f7893d4684dd47ba79b7ae6072811f00
SHA1

ff7adc2c8f2b9094361f3b2655152e4ea48e2c24
SHA256

95265cd9d3be6a02382744a140d2fc7ef6dd5fbfec0c03acb0e37c49192d3f35
SHA512

23d2c77e1e09ded7f2d0564767b57e238e07458ff8b08967acb6d179aa71415a4b9df4622005bc1c90f6cd102315a6e4c611edb87776fbe0b590f064cd8b9244

Score

10^/10

xloader zzun loader 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 5 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1248-62-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/1248-63-0x000000000041F6F0-mapping.dmp	xloader
behavioral1/memory/1248-69-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/1600-72-0x00000000000D0000-0x00000000000FC000-memory.dmp	xloader
behavioral1/memory/1600-76-0x00000000000D0000-0x00000000000FC000-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:

SEGU9670620.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Control Panel\International\Geo\Nation	SEGU9670620.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1312 cmd.exe

pid	process
1312	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

SEGU9670620.exeSEGU9670620.exechkdsk.exe

description	pid	process	target process
PID 1944 set thread context of 1248	1944	SEGU9670620.exe	SEGU9670620.exe
PID 1248 set thread context of 1188	1248	SEGU9670620.exe	Explorer.EXE
PID 1600 set thread context of 1188	1600	chkdsk.exe	Explorer.EXE

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 22 IoCs

Processes:

SEGU9670620.exechkdsk.exe

pid	process
1248	SEGU9670620.exe
1248	SEGU9670620.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe
1600	chkdsk.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

SEGU9670620.exechkdsk.exe

pid process

1248 SEGU9670620.exe
1248 SEGU9670620.exe
1248 SEGU9670620.exe
1600 chkdsk.exe
1600 chkdsk.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

SEGU9670620.exechkdsk.exe

description pid process

Token: SeDebugPrivilege 1248 SEGU9670620.exe
Token: SeDebugPrivilege 1600 chkdsk.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1188 Explorer.EXE
1188 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1188 Explorer.EXE
1188 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1248	SEGU9670620.exe
Token: SeDebugPrivilege	1600	chkdsk.exe

pid	process
1188	Explorer.EXE
1188	Explorer.EXE

pid	process
1188	Explorer.EXE
1188	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

SEGU9670620.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 1944 wrote to memory of 1248	1944	SEGU9670620.exe	SEGU9670620.exe
PID 1944 wrote to memory of 1248	1944	SEGU9670620.exe	SEGU9670620.exe
PID 1944 wrote to memory of 1248	1944	SEGU9670620.exe	SEGU9670620.exe
PID 1944 wrote to memory of 1248	1944	SEGU9670620.exe	SEGU9670620.exe
PID 1944 wrote to memory of 1248	1944	SEGU9670620.exe	SEGU9670620.exe
PID 1944 wrote to memory of 1248	1944	SEGU9670620.exe	SEGU9670620.exe
PID 1944 wrote to memory of 1248	1944	SEGU9670620.exe	SEGU9670620.exe
PID 1188 wrote to memory of 1600	1188	Explorer.EXE	chkdsk.exe
PID 1188 wrote to memory of 1600	1188	Explorer.EXE	chkdsk.exe
PID 1188 wrote to memory of 1600	1188	Explorer.EXE	chkdsk.exe
PID 1188 wrote to memory of 1600	1188	Explorer.EXE	chkdsk.exe
PID 1600 wrote to memory of 1312	1600	chkdsk.exe	cmd.exe
PID 1600 wrote to memory of 1312	1600	chkdsk.exe	cmd.exe
PID 1600 wrote to memory of 1312	1600	chkdsk.exe	cmd.exe
PID 1600 wrote to memory of 1312	1600	chkdsk.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1188

C:\Users\Admin\AppData\Local\Temp\SEGU9670620.exe
"C:\Users\Admin\AppData\Local\Temp\SEGU9670620.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1944

C:\Users\Admin\AppData\Local\Temp\SEGU9670620.exe
"{path}"
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1248

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:1600

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\SEGU9670620.exe"
3⤵
- Deletes itself
PID:1312

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1188-67-0x0000000004850000-0x0000000004907000-memory.dmp

Filesize
732KB

Download
memory/1188-77-0x0000000004910000-0x00000000049BE000-memory.dmp

Filesize
696KB

Download
memory/1188-75-0x0000000004910000-0x00000000049BE000-memory.dmp

Filesize
696KB

Download
memory/1248-66-0x00000000001D0000-0x00000000001E1000-memory.dmp

Filesize
68KB

Download
memory/1248-69-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1248-60-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1248-59-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1248-62-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1248-63-0x000000000041F6F0-mapping.dmp

Download
memory/1248-65-0x0000000000770000-0x0000000000A73000-memory.dmp

Filesize
3.0MB

Download
memory/1312-70-0x0000000000000000-mapping.dmp

Download
memory/1600-68-0x0000000000000000-mapping.dmp

Download
memory/1600-71-0x00000000001F0000-0x00000000001F7000-memory.dmp

Filesize
28KB

Download
memory/1600-73-0x0000000001FA0000-0x00000000022A3000-memory.dmp

Filesize
3.0MB

Download
memory/1600-72-0x00000000000D0000-0x00000000000FC000-memory.dmp

Filesize
176KB

Download
memory/1600-74-0x00000000022B0000-0x0000000002340000-memory.dmp

Filesize
576KB

Download
memory/1600-76-0x00000000000D0000-0x00000000000FC000-memory.dmp

Filesize
176KB

Download
memory/1944-54-0x0000000000E00000-0x0000000000EB8000-memory.dmp

Filesize
736KB

Download
memory/1944-57-0x00000000058C0000-0x0000000005948000-memory.dmp

Filesize
544KB

Download
memory/1944-58-0x0000000000BE0000-0x0000000000C16000-memory.dmp

Filesize
216KB

Download
memory/1944-56-0x0000000000220000-0x000000000022A000-memory.dmp

Filesize
40KB

Download
memory/1944-55-0x0000000076081000-0x0000000076083000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads