xloader | c9777cb78779de98104f1a01584f9df07e39b7ace7d5e6686d225e7261bd9447

General

Target

tmp.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 5 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1988-63-0x000000000041F640-mapping.dmp	xloader
behavioral1/memory/1988-62-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/1988-68-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/1988-72-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/1644-75-0x0000000000090000-0x00000000000BC000-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-1-5-21-335065374-4263250628-1829373619-1000\Control Panel\International\Geo\Nation tmp.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-335065374-4263250628-1829373619-1000\Control Panel\International\Geo\Nation	tmp.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

tmp.exetmp.exewuapp.exe

description	pid	process	target process
PID 1896 set thread context of 1988	1896	tmp.exe	tmp.exe
PID 1988 set thread context of 1228	1988	tmp.exe	Explorer.EXE
PID 1988 set thread context of 1228	1988	tmp.exe	Explorer.EXE
PID 1644 set thread context of 1228	1644	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-1-5-21-335065374-4263250628-1829373619-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	wuapp.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

Processes:

tmp.exewuapp.exe

pid	process
1988	tmp.exe
1988	tmp.exe
1988	tmp.exe
1644	wuapp.exe
1644	wuapp.exe
1644	wuapp.exe
1644	wuapp.exe
1644	wuapp.exe
1644	wuapp.exe
1644	wuapp.exe
1644	wuapp.exe
1644	wuapp.exe
1644	wuapp.exe
1644	wuapp.exe
1644	wuapp.exe
1644	wuapp.exe
1644	wuapp.exe

Suspicious behavior: MapViewOfSection 8 IoCs

Processes:

tmp.exewuapp.exe

pid process

1988 tmp.exe
1988 tmp.exe
1988 tmp.exe
1988 tmp.exe
1644 wuapp.exe
1644 wuapp.exe
1644 wuapp.exe
1644 wuapp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

tmp.exewuapp.exe

description pid process

Token: SeDebugPrivilege 1988 tmp.exe
Token: SeDebugPrivilege 1644 wuapp.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1228 Explorer.EXE
1228 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1228 Explorer.EXE
1228 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1988	tmp.exe
Token: SeDebugPrivilege	1644	wuapp.exe

pid	process
1228	Explorer.EXE
1228	Explorer.EXE

pid	process
1228	Explorer.EXE
1228	Explorer.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

tmp.exeExplorer.EXEwuapp.exe

description	pid	process	target process
PID 1896 wrote to memory of 1988	1896	tmp.exe	tmp.exe
PID 1896 wrote to memory of 1988	1896	tmp.exe	tmp.exe
PID 1896 wrote to memory of 1988	1896	tmp.exe	tmp.exe
PID 1896 wrote to memory of 1988	1896	tmp.exe	tmp.exe
PID 1896 wrote to memory of 1988	1896	tmp.exe	tmp.exe
PID 1896 wrote to memory of 1988	1896	tmp.exe	tmp.exe
PID 1896 wrote to memory of 1988	1896	tmp.exe	tmp.exe
PID 1228 wrote to memory of 1644	1228	Explorer.EXE	wuapp.exe
PID 1228 wrote to memory of 1644	1228	Explorer.EXE	wuapp.exe
PID 1228 wrote to memory of 1644	1228	Explorer.EXE	wuapp.exe
PID 1228 wrote to memory of 1644	1228	Explorer.EXE	wuapp.exe
PID 1228 wrote to memory of 1644	1228	Explorer.EXE	wuapp.exe
PID 1228 wrote to memory of 1644	1228	Explorer.EXE	wuapp.exe
PID 1228 wrote to memory of 1644	1228	Explorer.EXE	wuapp.exe
PID 1644 wrote to memory of 544	1644	wuapp.exe	Firefox.exe
PID 1644 wrote to memory of 544	1644	wuapp.exe	Firefox.exe
PID 1644 wrote to memory of 544	1644	wuapp.exe	Firefox.exe
PID 1644 wrote to memory of 544	1644	wuapp.exe	Firefox.exe
PID 1644 wrote to memory of 544	1644	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:1228

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:1896

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:1988

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:1644

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:544

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/1228-78-0x0000000004DF0000-0x0000000004F02000-memory.dmp

Filesize
1.1MB

Download
memory/1228-67-0x0000000004C80000-0x0000000004DE8000-memory.dmp

Filesize
1.4MB

Download
memory/1228-70-0x0000000002A60000-0x0000000002B17000-memory.dmp

Filesize
732KB

Download
memory/1228-77-0x0000000004DF0000-0x0000000004F02000-memory.dmp

Filesize
1.1MB

Download
memory/1644-75-0x0000000000090000-0x00000000000BC000-memory.dmp

Filesize
176KB

Download
memory/1644-76-0x0000000000940000-0x00000000009D0000-memory.dmp

Filesize
576KB

Download
memory/1644-74-0x0000000000AC0000-0x0000000000DC3000-memory.dmp

Filesize
3.0MB

Download
memory/1644-73-0x0000000001020000-0x000000000102B000-memory.dmp

Filesize
44KB

Download
memory/1644-71-0x0000000000000000-mapping.dmp

Download
memory/1896-54-0x00000000012E0000-0x0000000001368000-memory.dmp

Filesize
544KB

Download
memory/1896-58-0x0000000000590000-0x00000000005C2000-memory.dmp

Filesize
200KB

Download
memory/1896-57-0x0000000007450000-0x00000000074BA000-memory.dmp

Filesize
424KB

Download
memory/1896-56-0x0000000000320000-0x000000000032E000-memory.dmp

Filesize
56KB

Download
memory/1896-55-0x0000000075B81000-0x0000000075B83000-memory.dmp

Filesize
8KB

Download
memory/1988-59-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1988-69-0x00000000001D0000-0x00000000001E1000-memory.dmp

Filesize
68KB

Download
memory/1988-72-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1988-68-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1988-66-0x0000000000170000-0x0000000000181000-memory.dmp

Filesize
68KB

Download
memory/1988-64-0x0000000000970000-0x0000000000C73000-memory.dmp

Filesize
3.0MB

Download
memory/1988-62-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1988-63-0x000000000041F640-mapping.dmp

Download
memory/1988-60-0x0000000000400000-0x000000000042C000-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