dridex | ffcd3f21e103ef18413700ee91a9737900ea88fcae1607cffbf4d7f587039504

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
17-10-2024 14:41

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General

Target

t6yswb.pdf.dll
Size

590KB
MD5

770df303f86ac191c177035c214589ee
SHA1

6cb4229559c3bcc16d33a92f81fef25b1840d750
SHA256

ffcd3f21e103ef18413700ee91a9737900ea88fcae1607cffbf4d7f587039504
SHA512

e23ccdc09dd516cad89f8a2c0f11fa23e64e1b1fcff63f4e56338d24b35ab33a972e99898b80c6ade51382443a3993c9254ebd349167380a0fc2e97687c4bcd9
SSDEEP

6144:lIStqP+19P2yLnafTR93YBgobwN+5AxtyTCjzVm8NsCupaJ0p/:lIS0Gne883YdbY+5QyTE1kpa+V

Score

10^/10

dridex 10555 botnet discovery evasion trojan

Malware Config

Extracted

Family

dridex

Botnet

10555

162.241.44.26:9443

192.232.229.53:4443

77.220.64.34:443

193.90.12.121:3098

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 2500 rundll32.exe
5 2500 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
System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
discovery

System Language Discovery
T1614.001

Processes:

rundll32.exe

description ioc process

Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rundll32.exe

flow	pid	process
3	2500	rundll32.exe
5	2500	rundll32.exe

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

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 2088 wrote to memory of 2500	2088	rundll32.exe	rundll32.exe
PID 2088 wrote to memory of 2500	2088	rundll32.exe	rundll32.exe
PID 2088 wrote to memory of 2500	2088	rundll32.exe	rundll32.exe
PID 2088 wrote to memory of 2500	2088	rundll32.exe	rundll32.exe
PID 2088 wrote to memory of 2500	2088	rundll32.exe	rundll32.exe
PID 2088 wrote to memory of 2500	2088	rundll32.exe	rundll32.exe
PID 2088 wrote to memory of 2500	2088	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\t6yswb.pdf.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2088
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\t6yswb.pdf.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Checks whether UAC is enabled
  - System Location Discovery: System Language Discovery
  PID:2500

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2500-1-0x0000000010000000-0x0000000010097000-memory.dmp

Filesize
604KB

Download
memory/2500-2-0x0000000010000000-0x0000000010097000-memory.dmp

Filesize
604KB

Download
memory/2500-0-0x0000000010000000-0x0000000010097000-memory.dmp

Filesize
604KB

Download
memory/2500-3-0x0000000000310000-0x000000000038C000-memory.dmp

Filesize
496KB

Download
memory/2500-4-0x0000000000250000-0x000000000028D000-memory.dmp

Filesize
244KB

Download
memory/2500-5-0x0000000010000000-0x0000000010097000-memory.dmp

Filesize
604KB

Download
memory/2500-6-0x0000000000250000-0x000000000028D000-memory.dmp

Filesize
244KB

Download