dridex | fcd9abcb235ec7aea9a425394952653a57b44ba9233e934289d2b6892fac82b2

Analysis

max time kernel
132s
max time network
132s
platform
windows10_x64
resource
win10v20201028
submitted
09-11-2020 19:36

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General

Target

ptytmbdu.dll
Size

466KB
MD5

b0be7de75e36cc4322c757184cc6f3c8
SHA1

09ff86f5dbaab94cef3278cc4801463ebe9cef01
SHA256

fcd9abcb235ec7aea9a425394952653a57b44ba9233e934289d2b6892fac82b2
SHA512

b3ef6e0097399eff439bcda580c7ad08126dae194cbe5858d99aac1ccf91d56fcf7c2a9faa8246fbd8e06a47692be15ddb358f4f5f4e824ad97d20b5129c2586

Score

10^/10

dridex 10444 botnet discovery evasion loader trojan

Malware Config

Extracted

Family

dridex

Botnet

10444

38.88.126.131:443

145.239.169.32:8443

163.172.7.152:443

45.79.135.98:691

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
behavioral2/memory/1644-1-0x0000000073880000-0x00000000738AB000-memory.dmp	dridex_ldr

Blocklisted process makes network request 1 IoCs

Processes:

rundll32.exe

flow pid process

13 1644 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
13	1644	rundll32.exe

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

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 1344 wrote to memory of 1644	1344	rundll32.exe	rundll32.exe
PID 1344 wrote to memory of 1644	1344	rundll32.exe	rundll32.exe
PID 1344 wrote to memory of 1644	1344	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ptytmbdu.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1344

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ptytmbdu.dll,#1
2⤵
- Blocklisted process makes network request
- Checks whether UAC is enabled
PID:1644

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/1644-0-0x0000000000000000-mapping.dmp

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memory/1644-1-0x0000000073880000-0x00000000738AB000-memory.dmp

Filesize
172KB

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