xloader | c9777cb78779de98104f1a01584f9df07e39b7ace7d5e6686d225e7261bd9447

General

Target

gmb.exe
Size

517KB
MD5

a09f93f7606aa64851c9a8f82317b72f
SHA1

c33ea2eb219a088610847905251e5e2c3d2c87a2
SHA256

c9777cb78779de98104f1a01584f9df07e39b7ace7d5e6686d225e7261bd9447
SHA512

c5923ec47cc02a048fbbe8876c6f982d56dd6ea8936848db5a51ec6ad8ce16df9271a00c187a9ea653beaa490ba769c1339a5c3384180ba4d3961c471b7dfd59

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 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1404-136-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/1404-138-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/3560-144-0x0000000000D70000-0x0000000000D9C000-memory.dmp	xloader

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:

gmb.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation gmb.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	gmb.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

gmb.exegmb.exeraserver.exe

description	pid	process	target process
PID 2152 set thread context of 1404	2152	gmb.exe	gmb.exe
PID 1404 set thread context of 2148	1404	gmb.exe	Explorer.EXE
PID 3560 set thread context of 2148	3560	raserver.exe	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 30 IoCs

Processes:

gmb.exeraserver.exe

pid	process
1404	gmb.exe
1404	gmb.exe
1404	gmb.exe
1404	gmb.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe
3560	raserver.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2148 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

gmb.exeraserver.exe

pid process

1404 gmb.exe
1404 gmb.exe
1404 gmb.exe
3560 raserver.exe
3560 raserver.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

gmb.exeraserver.exe

description pid process

Token: SeDebugPrivilege 1404 gmb.exe
Token: SeDebugPrivilege 3560 raserver.exe

pid	process
2148	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1404	gmb.exe
Token: SeDebugPrivilege	3560	raserver.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

gmb.exeExplorer.EXE

description	pid	process	target process
PID 2152 wrote to memory of 1404	2152	gmb.exe	gmb.exe
PID 2152 wrote to memory of 1404	2152	gmb.exe	gmb.exe
PID 2152 wrote to memory of 1404	2152	gmb.exe	gmb.exe
PID 2152 wrote to memory of 1404	2152	gmb.exe	gmb.exe
PID 2152 wrote to memory of 1404	2152	gmb.exe	gmb.exe
PID 2152 wrote to memory of 1404	2152	gmb.exe	gmb.exe
PID 2148 wrote to memory of 3560	2148	Explorer.EXE	raserver.exe
PID 2148 wrote to memory of 3560	2148	Explorer.EXE	raserver.exe
PID 2148 wrote to memory of 3560	2148	Explorer.EXE	raserver.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2148

C:\Users\Admin\AppData\Local\Temp\gmb.exe
"C:\Users\Admin\AppData\Local\Temp\gmb.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2152

C:\Users\Admin\AppData\Local\Temp\gmb.exe
"C:\Users\Admin\AppData\Local\Temp\gmb.exe"
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1404

C:\Windows\SysWOW64\raserver.exe
"C:\Windows\SysWOW64\raserver.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3560

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

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Downloads

memory/1404-139-0x0000000001510000-0x000000000185A000-memory.dmp

Filesize
3.3MB

Download
memory/1404-140-0x0000000001940000-0x0000000001951000-memory.dmp

Filesize
68KB

Download
memory/1404-135-0x0000000000000000-mapping.dmp

Download
memory/1404-136-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1404-138-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/2148-148-0x0000000008690000-0x00000000087EF000-memory.dmp

Filesize
1.4MB

Download
memory/2148-147-0x0000000008690000-0x00000000087EF000-memory.dmp

Filesize
1.4MB

Download
memory/2148-141-0x0000000002930000-0x0000000002A0F000-memory.dmp

Filesize
892KB

Download
memory/2152-134-0x0000000005460000-0x00000000054FC000-memory.dmp

Filesize
624KB

Download
memory/2152-130-0x0000000000B40000-0x0000000000BC8000-memory.dmp

Filesize
544KB

Download
memory/2152-133-0x0000000007BE0000-0x0000000007BEA000-memory.dmp

Filesize
40KB

Download
memory/2152-132-0x0000000007A30000-0x0000000007AC2000-memory.dmp

Filesize
584KB

Download
memory/2152-131-0x0000000007F30000-0x00000000084D4000-memory.dmp

Filesize
5.6MB

Download
memory/3560-142-0x0000000000000000-mapping.dmp

Download
memory/3560-144-0x0000000000D70000-0x0000000000D9C000-memory.dmp

Filesize
176KB

Download
memory/3560-143-0x00000000002A0000-0x00000000002BF000-memory.dmp

Filesize
124KB

Download
memory/3560-145-0x0000000002E90000-0x00000000031DA000-memory.dmp

Filesize
3.3MB

Download
memory/3560-146-0x0000000002D70000-0x0000000002E00000-memory.dmp

Filesize
576KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads