xloader | 9b4f227304980351439c58e4b8a29844c7929c11de71051cf7c79f348996e8b1

General

Target

rfq.exe
Size

304KB
MD5

1fefc11b33956003889da1a5337179f4
SHA1

01a2773637fa5eea87508ee768d7ccff9bd09f7b
SHA256

9b4f227304980351439c58e4b8a29844c7929c11de71051cf7c79f348996e8b1
SHA512

f5e8faf8d630acf5a5f9cdd34e2b87cb67cb8877e5790ab63626adcb7f447bc05cd2d54b728b2c613f12b656c3a8f5b7516c0c5dcbed1a3d8bbcc1c0fa7c292a

Score

10^/10

xloader unzn loader rat suricata

Malware Config

Extracted

Family

xloader

Version

2.5

Campaign

unzn

C2

http://www.davanamays.com/unzn/

Decoy

xiulf.com

highcountrymortar.com

523561.com

marketingagency.tools

ganmovie.net

nationaalcontactpunt.com

sirrbter.com

begizas.xyz

missimi-fashion.com

munixc.info

daas.support

spaceworbc.com

faithtruthresolve.com

gymkub.com

thegrayverse.xyz

artisanmakefurniture.com

029tryy.com

ijuubx.biz

iphone13promax.club

techuniversus.com

Signatures

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 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/892-116-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral2/memory/892-117-0x000000000041D430-mapping.dmp	xloader
behavioral2/memory/1304-125-0x0000000004D20000-0x0000000004D49000-memory.dmp	xloader

Loads dropped DLL 1 IoCs

Processes:

rfq.exe

pid process

3496 rfq.exe

pid	process
3496	rfq.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

rfq.exerfq.exechkdsk.exe

description	pid	process	target process
PID 3496 set thread context of 892	3496	rfq.exe	rfq.exe
PID 892 set thread context of 2568	892	rfq.exe	Explorer.EXE
PID 1304 set thread context of 2568	1304	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 60 IoCs

Processes:

rfq.exechkdsk.exe

pid	process
892	rfq.exe
892	rfq.exe
892	rfq.exe
892	rfq.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe
1304	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2568 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

rfq.exechkdsk.exe

pid process

892 rfq.exe
892 rfq.exe
892 rfq.exe
1304 chkdsk.exe
1304 chkdsk.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

rfq.exechkdsk.exe

description pid process

Token: SeDebugPrivilege 892 rfq.exe
Token: SeDebugPrivilege 1304 chkdsk.exe

pid	process
2568	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	892	rfq.exe
Token: SeDebugPrivilege	1304	chkdsk.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

rfq.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 3496 wrote to memory of 892	3496	rfq.exe	rfq.exe
PID 3496 wrote to memory of 892	3496	rfq.exe	rfq.exe
PID 3496 wrote to memory of 892	3496	rfq.exe	rfq.exe
PID 3496 wrote to memory of 892	3496	rfq.exe	rfq.exe
PID 3496 wrote to memory of 892	3496	rfq.exe	rfq.exe
PID 3496 wrote to memory of 892	3496	rfq.exe	rfq.exe
PID 2568 wrote to memory of 1304	2568	Explorer.EXE	chkdsk.exe
PID 2568 wrote to memory of 1304	2568	Explorer.EXE	chkdsk.exe
PID 2568 wrote to memory of 1304	2568	Explorer.EXE	chkdsk.exe
PID 1304 wrote to memory of 2020	1304	chkdsk.exe	cmd.exe
PID 1304 wrote to memory of 2020	1304	chkdsk.exe	cmd.exe
PID 1304 wrote to memory of 2020	1304	chkdsk.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2568

C:\Users\Admin\AppData\Local\Temp\rfq.exe
"C:\Users\Admin\AppData\Local\Temp\rfq.exe"
2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3496

C:\Users\Admin\AppData\Local\Temp\rfq.exe
"C:\Users\Admin\AppData\Local\Temp\rfq.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:892

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:1304

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\rfq.exe"
3⤵
PID:2020

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

2

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\nsiD7F3.tmp\lgyx.dll
MD5
85f315070bb4e1181d70ad3cd91fb245

SHA1
1848b67bb67f9c5235367e60f9828c0081c34a25

SHA256
fd1cedeacb764040a514e54679106f609c1724559b17ae4c051f73135190cfcb

SHA512
1868003df1d37738929d4a88bf3666a3157cc36b17f243fd034f1301872617d91104314fe6a4c66253e0c63d36e63f0a307c22810099777dbd2580415d8fb927

Download Submit
memory/892-116-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/892-117-0x000000000041D430-mapping.dmp

Download
memory/892-120-0x0000000000E40000-0x0000000000E51000-memory.dmp

Filesize
68KB

Download
memory/892-119-0x00000000009D0000-0x0000000000CF0000-memory.dmp

Filesize
3.1MB

Download
memory/1304-122-0x0000000000000000-mapping.dmp

Download
memory/1304-124-0x00000000008F0000-0x00000000008FA000-memory.dmp

Filesize
40KB

Download
memory/1304-125-0x0000000004D20000-0x0000000004D49000-memory.dmp

Filesize
164KB

Download
memory/1304-126-0x0000000005430000-0x0000000005750000-memory.dmp

Filesize
3.1MB

Download
memory/1304-127-0x0000000005290000-0x0000000005320000-memory.dmp

Filesize
576KB

Download
memory/2020-123-0x0000000000000000-mapping.dmp

Download
memory/2568-121-0x0000000007000000-0x0000000007113000-memory.dmp

Filesize
1.1MB

Download
memory/2568-128-0x0000000007120000-0x000000000728C000-memory.dmp

Filesize
1.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads