xloader | 3085d62628657edccc65a18edda86f253fb86712a4e50b1cf67828bfa2d33e80

General

Target

Invoice pdf.exe
Size

680KB
MD5

3a91f6caa3965066b881d1de7a67f1b9
SHA1

6097fcf7687e0ec485eae2d57cf9b993ab520375
SHA256

3085d62628657edccc65a18edda86f253fb86712a4e50b1cf67828bfa2d33e80
SHA512

516b5704221bc49d607b80bafd6841976019f908869449c97f6a27c2840d43f62c76af2c5e464fb6b3f04079045b95883d3ed7fd684be1a269ec1663ba2b2dfb

Score

10^/10

xloader k8b5 loader rat

Malware Config

Extracted

Family

xloader

Version

2.3

Campaign

k8b5

C2

http://www.chongzhi365.com/k8b5/

Decoy

sardamedicals.com

reelectkendavis4council.com

coreconsultation.com

fajarazhary.com

mybitearner.com

brightpet.info

voicewithchoice.com

bailbondscompany.xyz

7133333333.com

delights.info

gawlvegdr.icu

sdqhpm.com

we2savvyok.com

primallifeathlete.com

gdsinglecell.com

isokineticmachines.com

smartneckrelax.com

gardenvintage.com

hiphopvolume.com

medicapoint.com

Signatures

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

Xloader Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1376-124-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral2/memory/1376-125-0x000000000041D0B0-mapping.dmp	xloader
behavioral2/memory/496-131-0x0000000002880000-0x00000000028A9000-memory.dmp	xloader

Suspicious use of SetThreadContext 3 IoCs

Processes:

Invoice pdf.exeInvoice pdf.execmstp.exe

description	pid	process	target process
PID 564 set thread context of 1376	564	Invoice pdf.exe	Invoice pdf.exe
PID 1376 set thread context of 2708	1376	Invoice pdf.exe	Explorer.EXE
PID 496 set thread context of 2708	496	cmstp.exe	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 40 IoCs

Processes:

Invoice pdf.execmstp.exe

pid	process
1376	Invoice pdf.exe
1376	Invoice pdf.exe
1376	Invoice pdf.exe
1376	Invoice pdf.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe
496	cmstp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2708 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

Invoice pdf.execmstp.exe

pid process

1376 Invoice pdf.exe
1376 Invoice pdf.exe
1376 Invoice pdf.exe
496 cmstp.exe
496 cmstp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Invoice pdf.execmstp.exe

description pid process

Token: SeDebugPrivilege 1376 Invoice pdf.exe
Token: SeDebugPrivilege 496 cmstp.exe
Suspicious use of UnmapMainImage 1 IoCs

Processes:

Explorer.EXE

pid process

2708 Explorer.EXE

pid	process
2708	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1376	Invoice pdf.exe
Token: SeDebugPrivilege	496	cmstp.exe

pid	process
2708	Explorer.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

Invoice pdf.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 564 wrote to memory of 1376	564	Invoice pdf.exe	Invoice pdf.exe
PID 564 wrote to memory of 1376	564	Invoice pdf.exe	Invoice pdf.exe
PID 564 wrote to memory of 1376	564	Invoice pdf.exe	Invoice pdf.exe
PID 564 wrote to memory of 1376	564	Invoice pdf.exe	Invoice pdf.exe
PID 564 wrote to memory of 1376	564	Invoice pdf.exe	Invoice pdf.exe
PID 564 wrote to memory of 1376	564	Invoice pdf.exe	Invoice pdf.exe
PID 2708 wrote to memory of 496	2708	Explorer.EXE	cmstp.exe
PID 2708 wrote to memory of 496	2708	Explorer.EXE	cmstp.exe
PID 2708 wrote to memory of 496	2708	Explorer.EXE	cmstp.exe
PID 496 wrote to memory of 3468	496	cmstp.exe	cmd.exe
PID 496 wrote to memory of 3468	496	cmstp.exe	cmd.exe
PID 496 wrote to memory of 3468	496	cmstp.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2708

C:\Users\Admin\AppData\Local\Temp\Invoice pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Invoice pdf.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:564

C:\Users\Admin\AppData\Local\Temp\Invoice pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Invoice pdf.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1376

C:\Windows\SysWOW64\cmstp.exe
"C:\Windows\SysWOW64\cmstp.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:496

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\Invoice pdf.exe"
3⤵
PID:3468

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/496-129-0x0000000000000000-mapping.dmp

Download
memory/496-134-0x00000000046A0000-0x000000000472F000-memory.dmp

Filesize
572KB

Download
memory/496-133-0x0000000004730000-0x0000000004A50000-memory.dmp

Filesize
3.1MB

Download
memory/496-131-0x0000000002880000-0x00000000028A9000-memory.dmp

Filesize
164KB

Download
memory/496-130-0x0000000000800000-0x0000000000816000-memory.dmp

Filesize
88KB

Download
memory/564-120-0x0000000005C60000-0x0000000005C76000-memory.dmp

Filesize
88KB

Download
memory/564-114-0x0000000000CC0000-0x0000000000CC1000-memory.dmp

Filesize
4KB

Download
memory/564-122-0x0000000007C90000-0x0000000007CF1000-memory.dmp

Filesize
388KB

Download
memory/564-123-0x000000000A340000-0x000000000A36B000-memory.dmp

Filesize
172KB

Download
memory/564-121-0x0000000007AF0000-0x0000000007AF1000-memory.dmp

Filesize
4KB

Download
memory/564-116-0x0000000005CC0000-0x0000000005CC1000-memory.dmp

Filesize
4KB

Download
memory/564-117-0x00000000056E0000-0x00000000056E1000-memory.dmp

Filesize
4KB

Download
memory/564-118-0x00000000057C0000-0x0000000005CBE000-memory.dmp

Filesize
5.0MB

Download
memory/564-119-0x0000000005780000-0x0000000005781000-memory.dmp

Filesize
4KB

Download
memory/1376-124-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/1376-126-0x00000000013A0000-0x00000000016C0000-memory.dmp

Filesize
3.1MB

Download
memory/1376-127-0x0000000000D00000-0x0000000000E4A000-memory.dmp

Filesize
1.3MB

Download
memory/1376-125-0x000000000041D0B0-mapping.dmp

Download
memory/2708-128-0x0000000004EC0000-0x0000000004FE7000-memory.dmp

Filesize
1.2MB

Download
memory/2708-135-0x0000000002710000-0x00000000027DD000-memory.dmp

Filesize
820KB

Download
memory/3468-132-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads