xloader | 1d9fc02237d06ae3ee5ea85ae14a05ab41ee99f03ac660e3f6360ac6864bf7fd

General

Target

tmp.exe
Size

641KB
MD5

85be6547409011c0804230f2f09f7ca3
SHA1

33eb9c66bb959332f963ab928fdbd655ac9e5e4e
SHA256

1d9fc02237d06ae3ee5ea85ae14a05ab41ee99f03ac660e3f6360ac6864bf7fd
SHA512

5e9e790f043d47bf21cd77caa556d18b957ab2c9587ef63836f84b8f42b102a8de085a2c6c2cf5a504b5a034c74dc25f2961b8415779311323e71c15b4432b7b

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
behavioral1/memory/2044-63-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/2044-64-0x000000000041F640-mapping.dmp	xloader
behavioral1/memory/2044-66-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/848-72-0x0000000000090000-0x00000000000BC000-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:

tmp.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Control Panel\International\Geo\Nation tmp.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Control Panel\International\Geo\Nation	tmp.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

tmp.exetmp.exewuapp.exe

description	pid	process	target process
PID 1624 set thread context of 2044	1624	tmp.exe	tmp.exe
PID 2044 set thread context of 1240	2044	tmp.exe	Explorer.EXE
PID 848 set thread context of 1240	848	wuapp.exe	Explorer.EXE

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

wuapp.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-3440072777-2118400376-1759599358-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	wuapp.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

tmp.exewuapp.exe

pid	process
2044	tmp.exe
2044	tmp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe
848	wuapp.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

tmp.exewuapp.exe

pid process

2044 tmp.exe
2044 tmp.exe
2044 tmp.exe
848 wuapp.exe
848 wuapp.exe
848 wuapp.exe
848 wuapp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

tmp.exewuapp.exe

description pid process

Token: SeDebugPrivilege 2044 tmp.exe
Token: SeDebugPrivilege 848 wuapp.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1240 Explorer.EXE
1240 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1240 Explorer.EXE
1240 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	2044	tmp.exe
Token: SeDebugPrivilege	848	wuapp.exe

pid	process
1240	Explorer.EXE
1240	Explorer.EXE

pid	process
1240	Explorer.EXE
1240	Explorer.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

tmp.exeExplorer.EXEwuapp.exe

description	pid	process	target process
PID 1624 wrote to memory of 2044	1624	tmp.exe	tmp.exe
PID 1624 wrote to memory of 2044	1624	tmp.exe	tmp.exe
PID 1624 wrote to memory of 2044	1624	tmp.exe	tmp.exe
PID 1624 wrote to memory of 2044	1624	tmp.exe	tmp.exe
PID 1624 wrote to memory of 2044	1624	tmp.exe	tmp.exe
PID 1624 wrote to memory of 2044	1624	tmp.exe	tmp.exe
PID 1624 wrote to memory of 2044	1624	tmp.exe	tmp.exe
PID 1240 wrote to memory of 848	1240	Explorer.EXE	wuapp.exe
PID 1240 wrote to memory of 848	1240	Explorer.EXE	wuapp.exe
PID 1240 wrote to memory of 848	1240	Explorer.EXE	wuapp.exe
PID 1240 wrote to memory of 848	1240	Explorer.EXE	wuapp.exe
PID 1240 wrote to memory of 848	1240	Explorer.EXE	wuapp.exe
PID 1240 wrote to memory of 848	1240	Explorer.EXE	wuapp.exe
PID 1240 wrote to memory of 848	1240	Explorer.EXE	wuapp.exe
PID 848 wrote to memory of 1820	848	wuapp.exe	Firefox.exe
PID 848 wrote to memory of 1820	848	wuapp.exe	Firefox.exe
PID 848 wrote to memory of 1820	848	wuapp.exe	Firefox.exe
PID 848 wrote to memory of 1820	848	wuapp.exe	Firefox.exe
PID 848 wrote to memory of 1820	848	wuapp.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1240

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1624

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:2044

C:\Windows\SysWOW64\wuapp.exe
"C:\Windows\SysWOW64\wuapp.exe"
2⤵
- Suspicious use of SetThreadContext
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:848

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1820

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/848-74-0x0000000001E30000-0x0000000001EC0000-memory.dmp

Filesize
576KB

Download
memory/848-73-0x0000000001F10000-0x0000000002213000-memory.dmp

Filesize
3.0MB

Download
memory/848-72-0x0000000000090000-0x00000000000BC000-memory.dmp

Filesize
176KB

Download
memory/848-71-0x0000000000390000-0x000000000039B000-memory.dmp

Filesize
44KB

Download
memory/848-70-0x0000000000000000-mapping.dmp

Download
memory/1240-69-0x0000000004D30000-0x0000000004ED2000-memory.dmp

Filesize
1.6MB

Download
memory/1240-77-0x0000000004800000-0x00000000048BD000-memory.dmp

Filesize
756KB

Download
memory/1240-76-0x0000000004D30000-0x0000000004ED2000-memory.dmp

Filesize
1.6MB

Download
memory/1240-75-0x0000000004800000-0x00000000048BD000-memory.dmp

Filesize
756KB

Download
memory/1624-59-0x0000000000C90000-0x0000000000CC2000-memory.dmp

Filesize
200KB

Download
memory/1624-54-0x0000000001290000-0x0000000001336000-memory.dmp

Filesize
664KB

Download
memory/1624-58-0x0000000005B60000-0x0000000005BCA000-memory.dmp

Filesize
424KB

Download
memory/1624-57-0x00000000005D0000-0x00000000005DA000-memory.dmp

Filesize
40KB

Download
memory/1624-56-0x00000000004C0000-0x00000000004DC000-memory.dmp

Filesize
112KB

Download
memory/1624-55-0x0000000075DF1000-0x0000000075DF3000-memory.dmp

Filesize
8KB

Download
memory/2044-66-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/2044-68-0x0000000000170000-0x0000000000181000-memory.dmp

Filesize
68KB

Download
memory/2044-64-0x000000000041F640-mapping.dmp

Download
memory/2044-67-0x0000000000A60000-0x0000000000D63000-memory.dmp

Filesize
3.0MB

Download
memory/2044-63-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/2044-61-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/2044-60-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads