xloader | f1619d4c36e975b2cc880b6a72db99282df847ebb72dc6446950dbcbf4d0f487

General

Target

po-1.exe
Size

854KB
MD5

991d571971fc0fe01211ef089fa905cc
SHA1

a5415e363e44e6586ed8f36a73ce2eb5bf4ed4fd
SHA256

f1619d4c36e975b2cc880b6a72db99282df847ebb72dc6446950dbcbf4d0f487
SHA512

c71e2498e6c252ccb10f96499258e28878e39c873025123815eb9565bcad101d90b7b51e74bcaa58926b426f4618fb2fb6db90b93bfb4508f903e43475edbee5

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/1456-125-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral2/memory/1456-126-0x000000000041D0B0-mapping.dmp	xloader
behavioral2/memory/1284-132-0x00000000023B0000-0x00000000023D9000-memory.dmp	xloader

Suspicious use of SetThreadContext 3 IoCs

Processes:

po-1.exepo-1.execmstp.exe

description	pid	process	target process
PID 1032 set thread context of 1456	1032	po-1.exe	po-1.exe
PID 1456 set thread context of 2740	1456	po-1.exe	Explorer.EXE
PID 1284 set thread context of 2740	1284	cmstp.exe	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 48 IoCs

Processes:

po-1.execmstp.exe

pid	process
1456	po-1.exe
1456	po-1.exe
1456	po-1.exe
1456	po-1.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe
1284	cmstp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2740 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

po-1.execmstp.exe

pid process

1456 po-1.exe
1456 po-1.exe
1456 po-1.exe
1284 cmstp.exe
1284 cmstp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

po-1.execmstp.exe

description pid process

Token: SeDebugPrivilege 1456 po-1.exe
Token: SeDebugPrivilege 1284 cmstp.exe
Suspicious use of UnmapMainImage 1 IoCs

Processes:

Explorer.EXE

pid process

2740 Explorer.EXE

pid	process
2740	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1456	po-1.exe
Token: SeDebugPrivilege	1284	cmstp.exe

pid	process
2740	Explorer.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

po-1.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 1032 wrote to memory of 1456	1032	po-1.exe	po-1.exe
PID 1032 wrote to memory of 1456	1032	po-1.exe	po-1.exe
PID 1032 wrote to memory of 1456	1032	po-1.exe	po-1.exe
PID 1032 wrote to memory of 1456	1032	po-1.exe	po-1.exe
PID 1032 wrote to memory of 1456	1032	po-1.exe	po-1.exe
PID 1032 wrote to memory of 1456	1032	po-1.exe	po-1.exe
PID 2740 wrote to memory of 1284	2740	Explorer.EXE	cmstp.exe
PID 2740 wrote to memory of 1284	2740	Explorer.EXE	cmstp.exe
PID 2740 wrote to memory of 1284	2740	Explorer.EXE	cmstp.exe
PID 1284 wrote to memory of 1128	1284	cmstp.exe	cmd.exe
PID 1284 wrote to memory of 1128	1284	cmstp.exe	cmd.exe
PID 1284 wrote to memory of 1128	1284	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:2740

C:\Users\Admin\AppData\Local\Temp\po-1.exe
"C:\Users\Admin\AppData\Local\Temp\po-1.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1032

C:\Users\Admin\AppData\Local\Temp\po-1.exe
"{path}"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1456

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:1284

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\po-1.exe"
3⤵
PID:1128

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/1032-114-0x0000000000700000-0x0000000000701000-memory.dmp

Filesize
4KB

Download
memory/1032-116-0x00000000074E0000-0x00000000074E1000-memory.dmp

Filesize
4KB

Download
memory/1032-117-0x0000000007A80000-0x0000000007A81000-memory.dmp

Filesize
4KB

Download
memory/1032-118-0x0000000007620000-0x0000000007621000-memory.dmp

Filesize
4KB

Download
memory/1032-119-0x00000000074C0000-0x00000000074C1000-memory.dmp

Filesize
4KB

Download
memory/1032-120-0x0000000007780000-0x0000000007781000-memory.dmp

Filesize
4KB

Download
memory/1032-121-0x0000000007580000-0x0000000007A7E000-memory.dmp

Filesize
5.0MB

Download
memory/1032-122-0x0000000004A40000-0x0000000004A4E000-memory.dmp

Filesize
56KB

Download
memory/1032-123-0x0000000008F80000-0x0000000009011000-memory.dmp

Filesize
580KB

Download
memory/1032-124-0x0000000009020000-0x000000000905F000-memory.dmp

Filesize
252KB

Download
memory/1128-133-0x0000000000000000-mapping.dmp

Download
memory/1284-130-0x0000000000000000-mapping.dmp

Download
memory/1284-131-0x0000000000220000-0x0000000000236000-memory.dmp

Filesize
88KB

Download
memory/1284-132-0x00000000023B0000-0x00000000023D9000-memory.dmp

Filesize
164KB

Download
memory/1284-134-0x0000000004560000-0x0000000004880000-memory.dmp

Filesize
3.1MB

Download
memory/1284-135-0x00000000043C0000-0x000000000444F000-memory.dmp

Filesize
572KB

Download
memory/1456-128-0x0000000001C00000-0x0000000001C10000-memory.dmp

Filesize
64KB

Download
memory/1456-127-0x0000000001750000-0x0000000001A70000-memory.dmp

Filesize
3.1MB

Download
memory/1456-126-0x000000000041D0B0-mapping.dmp

Download
memory/1456-125-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/2740-129-0x00000000056E0000-0x000000000583B000-memory.dmp

Filesize
1.4MB

Download
memory/2740-136-0x0000000005840000-0x0000000005955000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads