xloader | e01a44ecacb3c4c0e76c2708ad916ca81dba402b6e75a6fbef2874182af6c97f

General

Target

KYmFioOZjadXGyN.exe
Size

858KB
MD5

27083a2f76b59bee44401da75eaa2aa0
SHA1

fc43853029c2afe4caacada1406ac136a93e19b2
SHA256

e01a44ecacb3c4c0e76c2708ad916ca81dba402b6e75a6fbef2874182af6c97f
SHA512

b4228d82060d79b8568bed481e06d2734fe997bf1c0f3767ea237f90385cceed86237fa3039e30951df0d1f253aabc89d7b09d4b18ce50246f9400ab865c527d

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 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/3720-136-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/3720-138-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/3900-145-0x00000000004D0000-0x00000000004FC000-memory.dmp	xloader
behavioral2/memory/3900-147-0x00000000004D0000-0x00000000004FC000-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:

KYmFioOZjadXGyN.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Control Panel\International\Geo\Nation	KYmFioOZjadXGyN.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

KYmFioOZjadXGyN.exeKYmFioOZjadXGyN.exeraserver.exe

description	pid	process	target process
PID 4788 set thread context of 3720	4788	KYmFioOZjadXGyN.exe	KYmFioOZjadXGyN.exe
PID 3720 set thread context of 2616	3720	KYmFioOZjadXGyN.exe	Explorer.EXE
PID 3900 set thread context of 2616	3900	raserver.exe	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 50 IoCs

Processes:

KYmFioOZjadXGyN.exeraserver.exe

pid	process
3720	KYmFioOZjadXGyN.exe
3720	KYmFioOZjadXGyN.exe
3720	KYmFioOZjadXGyN.exe
3720	KYmFioOZjadXGyN.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe
3900	raserver.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2616 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

KYmFioOZjadXGyN.exeraserver.exe

pid process

3720 KYmFioOZjadXGyN.exe
3720 KYmFioOZjadXGyN.exe
3720 KYmFioOZjadXGyN.exe
3900 raserver.exe
3900 raserver.exe

pid	process
2616	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 18 IoCs

Processes:

KYmFioOZjadXGyN.exeraserver.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	3720	KYmFioOZjadXGyN.exe
Token: SeDebugPrivilege	3900	raserver.exe
Token: SeShutdownPrivilege	2616	Explorer.EXE
Token: SeCreatePagefilePrivilege	2616	Explorer.EXE
Token: SeShutdownPrivilege	2616	Explorer.EXE
Token: SeCreatePagefilePrivilege	2616	Explorer.EXE
Token: SeShutdownPrivilege	2616	Explorer.EXE
Token: SeCreatePagefilePrivilege	2616	Explorer.EXE
Token: SeShutdownPrivilege	2616	Explorer.EXE
Token: SeCreatePagefilePrivilege	2616	Explorer.EXE
Token: SeShutdownPrivilege	2616	Explorer.EXE
Token: SeCreatePagefilePrivilege	2616	Explorer.EXE
Token: SeShutdownPrivilege	2616	Explorer.EXE
Token: SeCreatePagefilePrivilege	2616	Explorer.EXE
Token: SeShutdownPrivilege	2616	Explorer.EXE
Token: SeCreatePagefilePrivilege	2616	Explorer.EXE
Token: SeShutdownPrivilege	2616	Explorer.EXE
Token: SeCreatePagefilePrivilege	2616	Explorer.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

2616 Explorer.EXE
2616 Explorer.EXE

pid	process
2616	Explorer.EXE
2616	Explorer.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

KYmFioOZjadXGyN.exeExplorer.EXEraserver.exe

description	pid	process	target process
PID 4788 wrote to memory of 3720	4788	KYmFioOZjadXGyN.exe	KYmFioOZjadXGyN.exe
PID 4788 wrote to memory of 3720	4788	KYmFioOZjadXGyN.exe	KYmFioOZjadXGyN.exe
PID 4788 wrote to memory of 3720	4788	KYmFioOZjadXGyN.exe	KYmFioOZjadXGyN.exe
PID 4788 wrote to memory of 3720	4788	KYmFioOZjadXGyN.exe	KYmFioOZjadXGyN.exe
PID 4788 wrote to memory of 3720	4788	KYmFioOZjadXGyN.exe	KYmFioOZjadXGyN.exe
PID 4788 wrote to memory of 3720	4788	KYmFioOZjadXGyN.exe	KYmFioOZjadXGyN.exe
PID 2616 wrote to memory of 3900	2616	Explorer.EXE	raserver.exe
PID 2616 wrote to memory of 3900	2616	Explorer.EXE	raserver.exe
PID 2616 wrote to memory of 3900	2616	Explorer.EXE	raserver.exe
PID 3900 wrote to memory of 2820	3900	raserver.exe	cmd.exe
PID 3900 wrote to memory of 2820	3900	raserver.exe	cmd.exe
PID 3900 wrote to memory of 2820	3900	raserver.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:2616

C:\Users\Admin\AppData\Local\Temp\KYmFioOZjadXGyN.exe
"C:\Users\Admin\AppData\Local\Temp\KYmFioOZjadXGyN.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4788

C:\Users\Admin\AppData\Local\Temp\KYmFioOZjadXGyN.exe
"{path}"
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3720

C:\Windows\SysWOW64\raserver.exe
"C:\Windows\SysWOW64\raserver.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3900

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\KYmFioOZjadXGyN.exe"
3⤵
PID:2820

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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/2616-141-0x00000000028A0000-0x00000000029C3000-memory.dmp

Filesize
1.1MB

Download
memory/2616-150-0x0000000008150000-0x00000000082D5000-memory.dmp

Filesize
1.5MB

Download
memory/2616-149-0x0000000008150000-0x00000000082D5000-memory.dmp

Filesize
1.5MB

Download
memory/2820-143-0x0000000000000000-mapping.dmp

Download
memory/3720-135-0x0000000000000000-mapping.dmp

Download
memory/3720-140-0x00000000014C0000-0x00000000014D1000-memory.dmp

Filesize
68KB

Download
memory/3720-136-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/3720-138-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/3720-139-0x0000000001510000-0x000000000185A000-memory.dmp

Filesize
3.3MB

Download
memory/3900-142-0x0000000000000000-mapping.dmp

Download
memory/3900-144-0x0000000000D20000-0x0000000000D3F000-memory.dmp

Filesize
124KB

Download
memory/3900-145-0x00000000004D0000-0x00000000004FC000-memory.dmp

Filesize
176KB

Download
memory/3900-146-0x00000000024B0000-0x00000000027FA000-memory.dmp

Filesize
3.3MB

Download
memory/3900-147-0x00000000004D0000-0x00000000004FC000-memory.dmp

Filesize
176KB

Download
memory/3900-148-0x0000000002300000-0x0000000002390000-memory.dmp

Filesize
576KB

Download
memory/4788-134-0x00000000053A0000-0x00000000053AA000-memory.dmp

Filesize
40KB

Download
memory/4788-130-0x0000000000A70000-0x0000000000B4C000-memory.dmp

Filesize
880KB

Download
memory/4788-133-0x00000000054C0000-0x000000000555C000-memory.dmp

Filesize
624KB

Download
memory/4788-132-0x0000000005420000-0x00000000054B2000-memory.dmp

Filesize
584KB

Download
memory/4788-131-0x0000000005930000-0x0000000005ED4000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads