dridex | b271b962d79730c73596a8881eb02727736820bb6cd8071c8d81e6d4dc7a951e

Analysis

max time kernel
8s
max time network
67s
platform
windows7_x64
resource
win7v20201028
submitted
12-11-2020 13:47

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General

Target

yh0aj4z[1].pdf.dll

Score

10^/10

dridex 10444 botnet discovery evasion loader trojan

Malware Config

Extracted

Family

dridex

Botnet

10444

77.220.64.39:443

69.164.207.140:3388

78.47.139.43:4443

103.244.206.74:33443

rc4.plain

Signatures

Dridex
Dridex(known as Bugat/Cridex) is a form of malware that specializes in stealing bank credentials.
botnet dridex

Dridex Loader 1 IoCs

Detects Dridex both x86 and x64 loader in memory.

botnet loader

Processes:

resource	yara_rule
behavioral1/memory/1616-1-0x0000000000290000-0x00000000002CD000-memory.dmp	dridex_ldr

Blocklisted process makes network request 2 IoCs

Processes:

rundll32.exe

flow	pid	Process
4	1616	rundll32.exe
6	1616	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

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

rundll32.exe

description	pid	Process	procid_target
PID 336 wrote to memory of 1616	336	rundll32.exe	25
PID 336 wrote to memory of 1616	336	rundll32.exe	25
PID 336 wrote to memory of 1616	336	rundll32.exe	25
PID 336 wrote to memory of 1616	336	rundll32.exe	25
PID 336 wrote to memory of 1616	336	rundll32.exe	25
PID 336 wrote to memory of 1616	336	rundll32.exe	25
PID 336 wrote to memory of 1616	336	rundll32.exe	25

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\yh0aj4z[1].pdf.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:336
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\yh0aj4z[1].pdf.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Checks whether UAC is enabled
  PID:1616

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1316-2-0x000007FEF7D30000-0x000007FEF7FAA000-memory.dmp

Filesize
2.5MB

Download
memory/1616-0-0x0000000000000000-mapping.dmp

Download
memory/1616-1-0x0000000000290000-0x00000000002CD000-memory.dmp

Filesize
244KB

Download