xloader | 4413a2e6e778cdc5dd839816a62d25e68095be325a28036b45f85716405a2d18

General

Target

tmp.exe
Size

689KB
MD5

8e5764617194a54afd7c5cc130fbeff8
SHA1

fc38d173b4f2421cbdf0547f498bf2658c09a6f3
SHA256

4413a2e6e778cdc5dd839816a62d25e68095be325a28036b45f85716405a2d18
SHA512

2a62802e73aa719882cc748f4f5d75661ed1049a44b715d7d3dea1788b6877af2c913299d1da80f71cb445d460ac01dfa89d040bd3613e07a4940241c4181d0a

Score

10^/10

xloader nn40 loader rat suricata

Malware Config

Extracted

Family

xloader

Version

2.8

Campaign

nn40

Decoy

LYAg0yANOGEAGeaFOrA/

MQWuERZplP+VZy/uszI=

CF0oDN0JimIaGy/uszI=

ltJnyC+ReohYaiTvj1qbEA==

B9OkgdctVKBAFjSUaw==

sbDVwSZVVqVB11/deow8GA==

v1gHDe0pzno=

i+/0n2vHUfGPR98k77tukZ90MQ==

SUtCnbS96Qm21g==

8X9qzyt1dpAo31jXrXfKb49fBPY=

5KlPxqHzSstuFjSUaw==

0r/Kesv/zuanroxvNQW0Gm8=

FFgS7kfPYAqpdhhgRgnBJHY=

LgusAHrkrIoWr0FWIe2o/04UXPw=

vBq9Gvxa9wbKbS/uszI=

Z+q6HAZNNeqwwQ==

wbS4fMb06SjU5Kbseow8GA==

1mZEuZvJ/m0L9bof56PkkZ90MQ==

JCJIM74lHk/o+tiFOrA/

d14FrM8rGEgIzVkT67+3XaEh

Signatures

Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata

Xloader Payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/64-138-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/64-143-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/64-147-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/2860-149-0x0000000000C10000-0x0000000000C3C000-memory.dmp	xloader

Blocklisted process makes network request 1 IoCs

Processes:

cmstp.exe

flow pid process

38 2860 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:

tmp.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation tmp.exe

flow	pid	process
38	2860	cmstp.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	tmp.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

tmp.exetmp.execmstp.exe

description	pid	process	target process
PID 2544 set thread context of 64	2544	tmp.exe	tmp.exe
PID 64 set thread context of 3128	64	tmp.exe	Explorer.EXE
PID 64 set thread context of 3128	64	tmp.exe	Explorer.EXE
PID 2860 set thread context of 3128	2860	cmstp.exe	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 48 IoCs

Processes:

tmp.exetmp.execmstp.exe

pid	process
2544	tmp.exe
2544	tmp.exe
2544	tmp.exe
2544	tmp.exe
64	tmp.exe
64	tmp.exe
64	tmp.exe
64	tmp.exe
64	tmp.exe
64	tmp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe
2860	cmstp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3128 Explorer.EXE
Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

tmp.execmstp.exe

pid process

64 tmp.exe
64 tmp.exe
64 tmp.exe
64 tmp.exe
2860 cmstp.exe
2860 cmstp.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

tmp.exetmp.execmstp.exe

description pid process

Token: SeDebugPrivilege 2544 tmp.exe
Token: SeDebugPrivilege 64 tmp.exe
Token: SeDebugPrivilege 2860 cmstp.exe

pid	process
3128	Explorer.EXE

pid	process
64	tmp.exe
64	tmp.exe
64	tmp.exe
64	tmp.exe
2860	cmstp.exe
2860	cmstp.exe

description	pid	process
Token: SeDebugPrivilege	2544	tmp.exe
Token: SeDebugPrivilege	64	tmp.exe
Token: SeDebugPrivilege	2860	cmstp.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

tmp.exeExplorer.EXE

description	pid	process	target process
PID 2544 wrote to memory of 1728	2544	tmp.exe	tmp.exe
PID 2544 wrote to memory of 1728	2544	tmp.exe	tmp.exe
PID 2544 wrote to memory of 1728	2544	tmp.exe	tmp.exe
PID 2544 wrote to memory of 4948	2544	tmp.exe	tmp.exe
PID 2544 wrote to memory of 4948	2544	tmp.exe	tmp.exe
PID 2544 wrote to memory of 4948	2544	tmp.exe	tmp.exe
PID 2544 wrote to memory of 64	2544	tmp.exe	tmp.exe
PID 2544 wrote to memory of 64	2544	tmp.exe	tmp.exe
PID 2544 wrote to memory of 64	2544	tmp.exe	tmp.exe
PID 2544 wrote to memory of 64	2544	tmp.exe	tmp.exe
PID 2544 wrote to memory of 64	2544	tmp.exe	tmp.exe
PID 2544 wrote to memory of 64	2544	tmp.exe	tmp.exe
PID 3128 wrote to memory of 2860	3128	Explorer.EXE	cmstp.exe
PID 3128 wrote to memory of 2860	3128	Explorer.EXE	cmstp.exe
PID 3128 wrote to memory of 2860	3128	Explorer.EXE	cmstp.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3128

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2544

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
3⤵
PID:1728

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
3⤵
PID:4948

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:64

C:\Windows\SysWOW64\cmstp.exe
"C:\Windows\SysWOW64\cmstp.exe"
2⤵
- Blocklisted process makes network request
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:2860

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

Replay Monitor

Loading Replay Monitor...

Downloads

memory/64-140-0x0000000001650000-0x000000000199A000-memory.dmp

Filesize
3.3MB

Download
memory/64-147-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/64-137-0x0000000000000000-mapping.dmp

Download
memory/64-138-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/64-144-0x0000000001630000-0x0000000001641000-memory.dmp

Filesize
68KB

Download
memory/64-141-0x00000000015E0000-0x00000000015F1000-memory.dmp

Filesize
68KB

Download
memory/64-143-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1728-135-0x0000000000000000-mapping.dmp

Download
memory/2544-131-0x0000000005620000-0x0000000005BC4000-memory.dmp

Filesize
5.6MB

Download
memory/2544-132-0x0000000005110000-0x00000000051A2000-memory.dmp

Filesize
584KB

Download
memory/2544-133-0x00000000050F0000-0x00000000050FA000-memory.dmp

Filesize
40KB

Download
memory/2544-134-0x0000000008ED0000-0x0000000008F6C000-memory.dmp

Filesize
624KB

Download
memory/2544-130-0x0000000000680000-0x0000000000732000-memory.dmp

Filesize
712KB

Download
memory/2860-146-0x0000000000000000-mapping.dmp

Download
memory/2860-149-0x0000000000C10000-0x0000000000C3C000-memory.dmp

Filesize
176KB

Download
memory/2860-148-0x00000000007E0000-0x00000000007F6000-memory.dmp

Filesize
88KB

Download
memory/2860-150-0x0000000002AA0000-0x0000000002DEA000-memory.dmp

Filesize
3.3MB

Download
memory/2860-151-0x00000000029F0000-0x0000000002A80000-memory.dmp

Filesize
576KB

Download
memory/3128-145-0x0000000008E00000-0x0000000008F74000-memory.dmp

Filesize
1.5MB

Download
memory/3128-142-0x00000000033A0000-0x0000000003510000-memory.dmp

Filesize
1.4MB

Download
memory/3128-152-0x0000000009100000-0x000000000923B000-memory.dmp

Filesize
1.2MB

Download
memory/3128-153-0x0000000009100000-0x000000000923B000-memory.dmp

Filesize
1.2MB

Download
memory/4948-136-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads