xloader | a7c1f4ae5c35b88e68b4d82db4c7e14d53922946d853569b5efd5050e7480229

Analysis

max time kernel
160s
max time network
164s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
02-09-2022 03:27

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General

Target

41.exe
Size

176KB
MD5

228b0bc29a751779e97f60e14a1b9f57
SHA1

0c735257db6d9afc8ee6a656a8634310411a049f
SHA256

5480ecfb5e60326a88fe45eb2adf3d9bc67e26fc2fc7800609a467e6a5f77444
SHA512

9a22551428299be14f05dfe3f0f1d710a1a15b794da3e0671abadd934fc576ba022458579d73cfe777c3599fd3c8859c118fa1b632cc7ce2c67108ad42af95f1
SSDEEP

3072:yTjyF3P55Z+0IhW59LQUlOsdZNjIZfR5/VUmhFaIItneeVw65z:33h5JI8LQKj3NjIZfR5/uCFaIItlVw6

Score

10^/10

xloader loader persistence rat spyware stealer

Malware Config

Signatures

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

Xloader payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral9/memory/4928-138-0x0000000000C00000-0x0000000000C2C000-memory.dmp	xloader
behavioral9/memory/4928-140-0x0000000000C00000-0x0000000000C2C000-memory.dmp	xloader

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

cmstp.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	cmstp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\C0ST8PIXTHQ = "C:\\Program Files (x86)\\Fqra\\phn0in_6zpl8lh.exe"	cmstp.exe

Blocklisted process makes network request 3 IoCs

Processes:

cmstp.exe

flow pid process

48 4928 cmstp.exe
52 4928 cmstp.exe
79 4928 cmstp.exe
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:

41.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation 41.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

flow	pid	process
48	4928	cmstp.exe
52	4928	cmstp.exe
79	4928	cmstp.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	41.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

41.execmstp.exe

description	pid	process	target process
PID 380 set thread context of 3092	380	41.exe	Explorer.EXE
PID 4928 set thread context of 3092	4928	cmstp.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

cmstp.exe

description ioc process

File opened for modification C:\Program Files (x86)\Fqra\phn0in_6zpl8lh.exe cmstp.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Fqra\phn0in_6zpl8lh.exe	cmstp.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

cmstp.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmstp.exe

Suspicious behavior: EnumeratesProcesses 58 IoCs

Processes:

41.execmstp.exe

pid	process
380	41.exe
380	41.exe
380	41.exe
380	41.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe
4928	cmstp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3092 Explorer.EXE
Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

41.execmstp.exe

pid process

380 41.exe
380 41.exe
380 41.exe
4928 cmstp.exe
4928 cmstp.exe
4928 cmstp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

41.execmstp.exe

description pid process

Token: SeDebugPrivilege 380 41.exe
Token: SeDebugPrivilege 4928 cmstp.exe

pid	process
3092	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	380	41.exe
Token: SeDebugPrivilege	4928	cmstp.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

Explorer.EXEcmstp.exe

description	pid	process	target process
PID 3092 wrote to memory of 4928	3092	Explorer.EXE	cmstp.exe
PID 3092 wrote to memory of 4928	3092	Explorer.EXE	cmstp.exe
PID 3092 wrote to memory of 4928	3092	Explorer.EXE	cmstp.exe
PID 4928 wrote to memory of 1288	4928	cmstp.exe	cmd.exe
PID 4928 wrote to memory of 1288	4928	cmstp.exe	cmd.exe
PID 4928 wrote to memory of 1288	4928	cmstp.exe	cmd.exe
PID 4928 wrote to memory of 2312	4928	cmstp.exe	Firefox.exe
PID 4928 wrote to memory of 2312	4928	cmstp.exe	Firefox.exe

System policy modification 1 TTPs 1 IoCs
evasion

Modify Registry
T1112

Processes:

cmstp.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer cmstp.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	cmstp.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3092

C:\Users\Admin\AppData\Local\Temp\41.exe
"C:\Users\Admin\AppData\Local\Temp\41.exe"
2⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:380

C:\Windows\SysWOW64\cmstp.exe
"C:\Windows\SysWOW64\cmstp.exe"
2⤵
- Adds policy Run key to start application
- Blocklisted process makes network request
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:4928

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\41.exe"
3⤵
PID:1288

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:2312

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/380-132-0x0000000000AC0000-0x0000000000E0A000-memory.dmp

Filesize
3.3MB

Download
memory/380-133-0x00000000005F0000-0x0000000000601000-memory.dmp

Filesize
68KB

Download
memory/1288-136-0x0000000000000000-mapping.dmp

Download
memory/3092-134-0x0000000007CD0000-0x0000000007D99000-memory.dmp

Filesize
804KB

Download
memory/3092-142-0x0000000008620000-0x0000000008792000-memory.dmp

Filesize
1.4MB

Download
memory/3092-143-0x0000000008620000-0x0000000008792000-memory.dmp

Filesize
1.4MB

Download
memory/4928-135-0x0000000000000000-mapping.dmp

Download
memory/4928-137-0x00000000008C0000-0x00000000008D6000-memory.dmp

Filesize
88KB

Download
memory/4928-139-0x0000000002B40000-0x0000000002E8A000-memory.dmp

Filesize
3.3MB

Download
memory/4928-138-0x0000000000C00000-0x0000000000C2C000-memory.dmp

Filesize
176KB

Download
memory/4928-140-0x0000000000C00000-0x0000000000C2C000-memory.dmp

Filesize
176KB

Download
memory/4928-141-0x00000000028E0000-0x0000000002970000-memory.dmp

Filesize
576KB

Download