nloader | a41258dd0239a487f31f91d4fd8e7d7eb05682bcb1e5f00d843382c3c5c20010 | Triage

Analysis

max time kernel
40s
max time network
49s
platform
windows10_x64
resource
win10v20210408
submitted
18-05-2021 19:25

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General

Target

4802545.xs2.dll
Size

110KB
MD5

cfb94c893280fd1edd40a4c74031727a
SHA1

9bf1f365e14842621854282f976b890478816a77
SHA256

3205ebcea1f138f0171ff3815d594883805b4af48a24bc0d6228d0b0ee12ddb4
SHA512

31b573054e5963c939cab24b48a8610f757ea94eba21c5101f2df3ffd8fc3120327795692feda7d448091a93b4befb389eed48e17662d7f2e3b19cc441a56988

Score

10^/10

nloader loader

Malware Config

Signatures

Nloader
Simple loader that includes the keyword 'campo' in the URL used to download other families.
loader nloader

Nloader Payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1300-115-0x0000000001040000-0x0000000001045000-memory.dmp	nloader

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3132 1300 WerFault.exe rundll32.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

WerFault.exe

pid	process
3132	WerFault.exe
3132	WerFault.exe
3132	WerFault.exe
3132	WerFault.exe
3132	WerFault.exe
3132	WerFault.exe
3132	WerFault.exe
3132	WerFault.exe
3132	WerFault.exe
3132	WerFault.exe
3132	WerFault.exe
3132	WerFault.exe
3132	WerFault.exe
3132	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

WerFault.exe

description pid process

Token: SeRestorePrivilege 3132 WerFault.exe
Token: SeBackupPrivilege 3132 WerFault.exe
Token: SeDebugPrivilege 3132 WerFault.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 852 wrote to memory of 1300	852	rundll32.exe	rundll32.exe
PID 852 wrote to memory of 1300	852	rundll32.exe	rundll32.exe
PID 852 wrote to memory of 1300	852	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4802545.xs2.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:852

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4802545.xs2.dll,#1
2⤵
PID:1300

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1300 -s 820
3⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3132

Network

MITRE ATT&CK Matrix

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Downloads

memory/1300-114-0x0000000000000000-mapping.dmp

Download
memory/1300-115-0x0000000001040000-0x0000000001045000-memory.dmp

Filesize
20KB

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