xloader | 993e2502c86bc87766ee853a75c89ffe6a635383c685b1aea785364b7c101b59

General

Target

RequestLetter 11DEC.exe
Size

907KB
MD5

eb62d3d13ff0e6dc6e3daa1b2513676c
SHA1

98a8345372e8b6ff98826c35f55fe594384eb235
SHA256

993e2502c86bc87766ee853a75c89ffe6a635383c685b1aea785364b7c101b59
SHA512

0592c3a025423d1b718a9d05a0619a2939877f420123580e02343d830ede8789df6a661b7745d3a3f046a7c9f33431179188390ed9b8f577138703bd9af92042

Score

10^/10

xloader ef6c loader rat

Malware Config

Extracted

Family

xloader

Version

2.5

Campaign

ef6c

C2

http://www.fis.photos/ef6c/

Decoy

gicaredocs.com

govusergroup.com

conversationspit.com

brondairy.com

rjtherealest.com

xn--9m1bq8wgkag3rjvb.com

mylori.net

softandcute.store

ahljsm.com

shacksolid.com

weekendmusecollection.com

gaminghallarna.net

pgonline111.online

44mpt.xyz

ambrandt.com

eddytattoo.com

blendeqes.com

upinmyfeels.com

lacucinadesign.com

docomoau.xyz

Signatures

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

Xloader Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/2252-126-0x000000000041D3D0-mapping.dmp	xloader
behavioral2/memory/2252-125-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral2/memory/2672-133-0x0000000000780000-0x00000000007A9000-memory.dmp	xloader

Suspicious use of SetThreadContext 3 IoCs

Processes:

RequestLetter 11DEC.exeRequestLetter 11DEC.exechkdsk.exe

description	pid	process	target process
PID 672 set thread context of 2252	672	RequestLetter 11DEC.exe	RequestLetter 11DEC.exe
PID 2252 set thread context of 3056	2252	RequestLetter 11DEC.exe	Explorer.EXE
PID 2672 set thread context of 3056	2672	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 50 IoCs

Processes:

RequestLetter 11DEC.exeRequestLetter 11DEC.exechkdsk.exe

pid	process
672	RequestLetter 11DEC.exe
672	RequestLetter 11DEC.exe
672	RequestLetter 11DEC.exe
672	RequestLetter 11DEC.exe
2252	RequestLetter 11DEC.exe
2252	RequestLetter 11DEC.exe
2252	RequestLetter 11DEC.exe
2252	RequestLetter 11DEC.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe
2672	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3056 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

RequestLetter 11DEC.exechkdsk.exe

pid process

2252 RequestLetter 11DEC.exe
2252 RequestLetter 11DEC.exe
2252 RequestLetter 11DEC.exe
2672 chkdsk.exe
2672 chkdsk.exe

pid	process
3056	Explorer.EXE

pid	process
2252	RequestLetter 11DEC.exe
2252	RequestLetter 11DEC.exe
2252	RequestLetter 11DEC.exe
2672	chkdsk.exe
2672	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

RequestLetter 11DEC.exeRequestLetter 11DEC.exechkdsk.exe

description	pid	process
Token: SeDebugPrivilege	672	RequestLetter 11DEC.exe
Token: SeDebugPrivilege	2252	RequestLetter 11DEC.exe
Token: SeDebugPrivilege	2672	chkdsk.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

RequestLetter 11DEC.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 672 wrote to memory of 1452	672	RequestLetter 11DEC.exe	RequestLetter 11DEC.exe
PID 672 wrote to memory of 1452	672	RequestLetter 11DEC.exe	RequestLetter 11DEC.exe
PID 672 wrote to memory of 1452	672	RequestLetter 11DEC.exe	RequestLetter 11DEC.exe
PID 672 wrote to memory of 1880	672	RequestLetter 11DEC.exe	RequestLetter 11DEC.exe
PID 672 wrote to memory of 1880	672	RequestLetter 11DEC.exe	RequestLetter 11DEC.exe
PID 672 wrote to memory of 1880	672	RequestLetter 11DEC.exe	RequestLetter 11DEC.exe
PID 672 wrote to memory of 2252	672	RequestLetter 11DEC.exe	RequestLetter 11DEC.exe
PID 672 wrote to memory of 2252	672	RequestLetter 11DEC.exe	RequestLetter 11DEC.exe
PID 672 wrote to memory of 2252	672	RequestLetter 11DEC.exe	RequestLetter 11DEC.exe
PID 672 wrote to memory of 2252	672	RequestLetter 11DEC.exe	RequestLetter 11DEC.exe
PID 672 wrote to memory of 2252	672	RequestLetter 11DEC.exe	RequestLetter 11DEC.exe
PID 672 wrote to memory of 2252	672	RequestLetter 11DEC.exe	RequestLetter 11DEC.exe
PID 3056 wrote to memory of 2672	3056	Explorer.EXE	chkdsk.exe
PID 3056 wrote to memory of 2672	3056	Explorer.EXE	chkdsk.exe
PID 3056 wrote to memory of 2672	3056	Explorer.EXE	chkdsk.exe
PID 2672 wrote to memory of 2748	2672	chkdsk.exe	cmd.exe
PID 2672 wrote to memory of 2748	2672	chkdsk.exe	cmd.exe
PID 2672 wrote to memory of 2748	2672	chkdsk.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3056

C:\Users\Admin\AppData\Local\Temp\RequestLetter 11DEC.exe
"C:\Users\Admin\AppData\Local\Temp\RequestLetter 11DEC.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:672

C:\Users\Admin\AppData\Local\Temp\RequestLetter 11DEC.exe
"C:\Users\Admin\AppData\Local\Temp\RequestLetter 11DEC.exe"
3⤵
PID:1452

C:\Users\Admin\AppData\Local\Temp\RequestLetter 11DEC.exe
"C:\Users\Admin\AppData\Local\Temp\RequestLetter 11DEC.exe"
3⤵
PID:1880

C:\Users\Admin\AppData\Local\Temp\RequestLetter 11DEC.exe
"C:\Users\Admin\AppData\Local\Temp\RequestLetter 11DEC.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:2252

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:2672

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\RequestLetter 11DEC.exe"
3⤵
PID:2748

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/672-115-0x00000000007E0000-0x00000000007E1000-memory.dmp

Filesize
4KB

Download
memory/672-117-0x0000000005820000-0x0000000005821000-memory.dmp

Filesize
4KB

Download
memory/672-118-0x0000000005320000-0x0000000005321000-memory.dmp

Filesize
4KB

Download
memory/672-119-0x00000000052F0000-0x00000000052F1000-memory.dmp

Filesize
4KB

Download
memory/672-120-0x0000000005230000-0x0000000005231000-memory.dmp

Filesize
4KB

Download
memory/672-121-0x0000000005580000-0x0000000005587000-memory.dmp

Filesize
28KB

Download
memory/672-122-0x00000000076A0000-0x00000000076A1000-memory.dmp

Filesize
4KB

Download
memory/672-123-0x00000000079D0000-0x00000000079D1000-memory.dmp

Filesize
4KB

Download
memory/672-124-0x0000000007A70000-0x0000000007B86000-memory.dmp

Filesize
1.1MB

Download
memory/2252-125-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/2252-126-0x000000000041D3D0-mapping.dmp

Download
memory/2252-128-0x0000000001120000-0x0000000001440000-memory.dmp

Filesize
3.1MB

Download
memory/2252-129-0x00000000010D0000-0x00000000010E1000-memory.dmp

Filesize
68KB

Download
memory/2672-131-0x0000000000000000-mapping.dmp

Download
memory/2672-132-0x0000000001290000-0x000000000129A000-memory.dmp

Filesize
40KB

Download
memory/2672-133-0x0000000000780000-0x00000000007A9000-memory.dmp

Filesize
164KB

Download
memory/2672-135-0x00000000052A0000-0x00000000055C0000-memory.dmp

Filesize
3.1MB

Download
memory/2672-136-0x0000000001070000-0x0000000001100000-memory.dmp

Filesize
576KB

Download
memory/2748-134-0x0000000000000000-mapping.dmp

Download
memory/3056-130-0x0000000005C10000-0x0000000005CC7000-memory.dmp

Filesize
732KB

Download
memory/3056-137-0x0000000005CD0000-0x0000000005E0E000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads