xloader | 72fd8d816c54cacc80a7364d61fccfb6f4c2b9a88ed0cb9296e038b615731cfb

General

Target

VQC612aN8kkRJe9.exe
Size

578KB
MD5

2424734321f03e8048202f10ba707c29
SHA1

e085ae7d3b35f036ebf49076869203a29d9db3c0
SHA256

72fd8d816c54cacc80a7364d61fccfb6f4c2b9a88ed0cb9296e038b615731cfb
SHA512

1208d8b231775575cfc360a16fe0d93bbe888253377ac350091d249b9041272f66bd32476c2db9931e4bd34e238a1bc656ad03fffc0480a1cb365ebd705a5b7d

Score

10^/10

xloader zzun loader persistence rat spyware stealer

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 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/3792-138-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/3792-140-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/3984-147-0x0000000000AA0000-0x0000000000ACC000-memory.dmp	xloader
behavioral2/memory/3984-150-0x0000000000AA0000-0x0000000000ACC000-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:

VQC612aN8kkRJe9.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2783062828-828903012-4218294845-1000\Control Panel\International\Geo\Nation	VQC612aN8kkRJe9.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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

chkdsk.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	chkdsk.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\TPCPTVMXCN = "C:\\Program Files (x86)\\Cjx4pilvx\\nhlhbjydyhlzxh.exe"	chkdsk.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

VQC612aN8kkRJe9.exeVQC612aN8kkRJe9.exechkdsk.exe

description	pid	process	target process
PID 3868 set thread context of 3792	3868	VQC612aN8kkRJe9.exe	VQC612aN8kkRJe9.exe
PID 3792 set thread context of 2344	3792	VQC612aN8kkRJe9.exe	Explorer.EXE
PID 3984 set thread context of 2344	3984	chkdsk.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

chkdsk.exe

description ioc process

File opened for modification C:\Program Files (x86)\Cjx4pilvx\nhlhbjydyhlzxh.exe chkdsk.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
File opened for modification	C:\Program Files (x86)\Cjx4pilvx\nhlhbjydyhlzxh.exe	chkdsk.exe

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

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

chkdsk.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-2783062828-828903012-4218294845-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 50 IoCs

Processes:

VQC612aN8kkRJe9.exeVQC612aN8kkRJe9.exechkdsk.exe

pid	process
3868	VQC612aN8kkRJe9.exe
3868	VQC612aN8kkRJe9.exe
3868	VQC612aN8kkRJe9.exe
3868	VQC612aN8kkRJe9.exe
3792	VQC612aN8kkRJe9.exe
3792	VQC612aN8kkRJe9.exe
3792	VQC612aN8kkRJe9.exe
3792	VQC612aN8kkRJe9.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2344 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

VQC612aN8kkRJe9.exechkdsk.exe

pid process

3792 VQC612aN8kkRJe9.exe
3792 VQC612aN8kkRJe9.exe
3792 VQC612aN8kkRJe9.exe
3984 chkdsk.exe
3984 chkdsk.exe
3984 chkdsk.exe
3984 chkdsk.exe

pid	process
2344	Explorer.EXE

pid	process
3792	VQC612aN8kkRJe9.exe
3792	VQC612aN8kkRJe9.exe
3792	VQC612aN8kkRJe9.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe
3984	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

VQC612aN8kkRJe9.exeVQC612aN8kkRJe9.exechkdsk.exe

description	pid	process
Token: SeDebugPrivilege	3868	VQC612aN8kkRJe9.exe
Token: SeDebugPrivilege	3792	VQC612aN8kkRJe9.exe
Token: SeDebugPrivilege	3984	chkdsk.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

VQC612aN8kkRJe9.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 3868 wrote to memory of 3744	3868	VQC612aN8kkRJe9.exe	VQC612aN8kkRJe9.exe
PID 3868 wrote to memory of 3744	3868	VQC612aN8kkRJe9.exe	VQC612aN8kkRJe9.exe
PID 3868 wrote to memory of 3744	3868	VQC612aN8kkRJe9.exe	VQC612aN8kkRJe9.exe
PID 3868 wrote to memory of 792	3868	VQC612aN8kkRJe9.exe	VQC612aN8kkRJe9.exe
PID 3868 wrote to memory of 792	3868	VQC612aN8kkRJe9.exe	VQC612aN8kkRJe9.exe
PID 3868 wrote to memory of 792	3868	VQC612aN8kkRJe9.exe	VQC612aN8kkRJe9.exe
PID 3868 wrote to memory of 3792	3868	VQC612aN8kkRJe9.exe	VQC612aN8kkRJe9.exe
PID 3868 wrote to memory of 3792	3868	VQC612aN8kkRJe9.exe	VQC612aN8kkRJe9.exe
PID 3868 wrote to memory of 3792	3868	VQC612aN8kkRJe9.exe	VQC612aN8kkRJe9.exe
PID 3868 wrote to memory of 3792	3868	VQC612aN8kkRJe9.exe	VQC612aN8kkRJe9.exe
PID 3868 wrote to memory of 3792	3868	VQC612aN8kkRJe9.exe	VQC612aN8kkRJe9.exe
PID 3868 wrote to memory of 3792	3868	VQC612aN8kkRJe9.exe	VQC612aN8kkRJe9.exe
PID 2344 wrote to memory of 3984	2344	Explorer.EXE	chkdsk.exe
PID 2344 wrote to memory of 3984	2344	Explorer.EXE	chkdsk.exe
PID 2344 wrote to memory of 3984	2344	Explorer.EXE	chkdsk.exe
PID 3984 wrote to memory of 3412	3984	chkdsk.exe	cmd.exe
PID 3984 wrote to memory of 3412	3984	chkdsk.exe	cmd.exe
PID 3984 wrote to memory of 3412	3984	chkdsk.exe	cmd.exe
PID 3984 wrote to memory of 3920	3984	chkdsk.exe	cmd.exe
PID 3984 wrote to memory of 3920	3984	chkdsk.exe	cmd.exe
PID 3984 wrote to memory of 3920	3984	chkdsk.exe	cmd.exe
PID 3984 wrote to memory of 1192	3984	chkdsk.exe	cmd.exe
PID 3984 wrote to memory of 1192	3984	chkdsk.exe	cmd.exe
PID 3984 wrote to memory of 1192	3984	chkdsk.exe	cmd.exe
PID 3984 wrote to memory of 3556	3984	chkdsk.exe	Firefox.exe
PID 3984 wrote to memory of 3556	3984	chkdsk.exe	Firefox.exe
PID 3984 wrote to memory of 3556	3984	chkdsk.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2344

C:\Users\Admin\AppData\Local\Temp\VQC612aN8kkRJe9.exe
"C:\Users\Admin\AppData\Local\Temp\VQC612aN8kkRJe9.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3868

C:\Users\Admin\AppData\Local\Temp\VQC612aN8kkRJe9.exe
"{path}"
3⤵
PID:3744

C:\Users\Admin\AppData\Local\Temp\VQC612aN8kkRJe9.exe
"{path}"
3⤵
PID:792

C:\Users\Admin\AppData\Local\Temp\VQC612aN8kkRJe9.exe
"{path}"
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3792

C:\Windows\SysWOW64\chkdsk.exe
"C:\Windows\SysWOW64\chkdsk.exe"
2⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3984

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\VQC612aN8kkRJe9.exe"
3⤵
PID:3412

C:\Windows\SysWOW64\cmd.exe
/c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
3⤵
PID:3920

C:\Windows\SysWOW64\cmd.exe
/c copy "C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
3⤵
PID:1192

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:3556

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

Credentials in Files

1

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\DB1
Filesize
40KB

MD5
b608d407fc15adea97c26936bc6f03f6

SHA1
953e7420801c76393902c0d6bb56148947e41571

SHA256
b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

SHA512
cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

Download Submit
C:\Users\Admin\AppData\Local\Temp\DB1
Filesize
48KB

MD5
349e6eb110e34a08924d92f6b334801d

SHA1
bdfb289daff51890cc71697b6322aa4b35ec9169

SHA256
c9fd7be4579e4aa942e8c2b44ab10115fa6c2fe6afd0c584865413d9d53f3b2a

SHA512
2a635b815a5e117ea181ee79305ee1baf591459427acc5210d8c6c7e447be3513ead871c605eb3d32e4ab4111b2a335f26520d0ef8c1245a4af44e1faec44574

Download Submit
memory/792-136-0x0000000000000000-mapping.dmp

Download
memory/1192-155-0x0000000000000000-mapping.dmp

Download
memory/2344-143-0x0000000008690000-0x0000000008756000-memory.dmp

Filesize
792KB

Download
memory/2344-152-0x0000000008B90000-0x0000000008D1F000-memory.dmp

Filesize
1.6MB

Download
memory/2344-151-0x0000000008B90000-0x0000000008D1F000-memory.dmp

Filesize
1.6MB

Download
memory/3412-145-0x0000000000000000-mapping.dmp

Download
memory/3744-135-0x0000000000000000-mapping.dmp

Download
memory/3792-142-0x0000000000A90000-0x0000000000AA1000-memory.dmp

Filesize
68KB

Download
memory/3792-137-0x0000000000000000-mapping.dmp

Download
memory/3792-140-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/3792-138-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/3792-141-0x0000000000F50000-0x000000000129A000-memory.dmp

Filesize
3.3MB

Download
memory/3868-130-0x0000000000110000-0x00000000001A6000-memory.dmp

Filesize
600KB

Download
memory/3868-131-0x0000000005140000-0x00000000056E4000-memory.dmp

Filesize
5.6MB

Download
memory/3868-132-0x0000000004B90000-0x0000000004C22000-memory.dmp

Filesize
584KB

Download
memory/3868-133-0x0000000004C30000-0x0000000004CCC000-memory.dmp

Filesize
624KB

Download
memory/3868-134-0x0000000004B30000-0x0000000004B3A000-memory.dmp

Filesize
40KB

Download
memory/3920-153-0x0000000000000000-mapping.dmp

Download
memory/3984-150-0x0000000000AA0000-0x0000000000ACC000-memory.dmp

Filesize
176KB

Download
memory/3984-149-0x0000000001120000-0x00000000011B0000-memory.dmp

Filesize
576KB

Download
memory/3984-148-0x00000000012C0000-0x000000000160A000-memory.dmp

Filesize
3.3MB

Download
memory/3984-147-0x0000000000AA0000-0x0000000000ACC000-memory.dmp

Filesize
176KB

Download
memory/3984-146-0x0000000000570000-0x000000000057A000-memory.dmp

Filesize
40KB

Download
memory/3984-144-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads