dridex | b6cf019dca618ebc676b84c40846e0a9a2050689b35845af2f12a93442fb25e8

Analysis

max time kernel
106s
max time network
124s
platform
windows7_x64
resource
win7-20220414-en
submitted
19-05-2022 02:18

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General

Target

u5nmsr.dll
Size

717KB
MD5

59d4c719403b793876d65395f5a2d0bd
SHA1

0b224d9b94af60a8fec79416d4b1bcab8cf9308c
SHA256

b6cf019dca618ebc676b84c40846e0a9a2050689b35845af2f12a93442fb25e8
SHA512

d395272ad4169d8de1f660b239d3dfc9937abb29aec05ba7527c5307cf90825058f3107e85acf8f5f4afe3b64c24e226edca3f84c678043469674292ade3f8b5

Score

10^/10

dridex 10444 botnet discovery evasion trojan

Malware Config

Extracted

Family

dridex

Botnet

10444

97.107.127.161:443

45.33.94.33:5037

159.89.91.92:5037

158.69.118.130:1443

rc4.plain

Signatures

Dridex
Dridex(known as Bugat/Cridex) is a form of malware that specializes in stealing bank credentials.
botnet dridex
Blocklisted process makes network request 2 IoCs

Processes:

rundll32.exe

flow pid process

3 2024 rundll32.exe
5 2024 rundll32.exe
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

rundll32.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA rundll32.exe

flow	pid	process
3	2024	rundll32.exe
5	2024	rundll32.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 1972 wrote to memory of 2024	1972	rundll32.exe	rundll32.exe
PID 1972 wrote to memory of 2024	1972	rundll32.exe	rundll32.exe
PID 1972 wrote to memory of 2024	1972	rundll32.exe	rundll32.exe
PID 1972 wrote to memory of 2024	1972	rundll32.exe	rundll32.exe
PID 1972 wrote to memory of 2024	1972	rundll32.exe	rundll32.exe
PID 1972 wrote to memory of 2024	1972	rundll32.exe	rundll32.exe
PID 1972 wrote to memory of 2024	1972	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\u5nmsr.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1972

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\u5nmsr.dll,#1
2⤵
- Blocklisted process makes network request
- Checks whether UAC is enabled
PID:2024

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/2024-54-0x0000000000000000-mapping.dmp

Download
memory/2024-55-0x0000000075F21000-0x0000000075F23000-memory.dmp

Filesize
8KB

Download
memory/2024-57-0x0000000075170000-0x0000000075236000-memory.dmp

Filesize
792KB

Download
memory/2024-56-0x0000000075170000-0x00000000751AD000-memory.dmp

Filesize
244KB

Download
memory/2024-59-0x0000000075170000-0x0000000075236000-memory.dmp

Filesize
792KB

Download