dridex | d1246b6a477f067776d2d64a193da27f297332ae565ee2aff3cb143c3c02a9fb

Analysis

max time kernel
145s
max time network
147s
platform
windows7_x64
resource
win7v20201028
submitted
09/12/2020, 12:59

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General

Target
s5kh50rfbzip.dll
Size 538KB
Sample201209-s9d98ry666
SHA256 d1246b6a477f067776d2d64a193da27f297332ae565ee2aff3cb143c3c02a9fb
MD5 208ea18a1c208b72527dfda07853eb9d
SHA1 4b616711270f7c419a7eabed9636069454a5324e
SHA512 0795552ddbaf95071a297346a1d9e3d4fc1cb734cbd52e7af3d5f2cd0310139f5aa5ca6aff6ea656d2adee14401519858348b966a4bb4d4c5b088ebc05382c16
MD5 SHA1 SHA512

Score

10^/10

dridex 10444 botnet discovery evasion loader trojan

Malware Config

Extracted

Family

dridex

Botnet

10444

169.255.216.36:443
138.201.138.91:3389
89.174.36.41:4643
87.106.89.36:3389

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

resource	yara_rule
behavioral1/memory/1052-3-0x00000000002E0000-0x000000000031D000-memory.dmp	dridex_ldr

Blocklisted process makes network request 4 IoCs

flow	pid	Process
3	1052	rundll32.exe
6	1052	rundll32.exe
7	1052	rundll32.exe
8	1052	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

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

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1824 wrote to memory of 1052	1824	rundll32.exe	25
PID 1824 wrote to memory of 1052	1824	rundll32.exe	25
PID 1824 wrote to memory of 1052	1824	rundll32.exe	25
PID 1824 wrote to memory of 1052	1824	rundll32.exe	25
PID 1824 wrote to memory of 1052	1824	rundll32.exe	25
PID 1824 wrote to memory of 1052	1824	rundll32.exe	25
PID 1824 wrote to memory of 1052	1824	rundll32.exe	25

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\s5kh50rfbzip.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1824
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\s5kh50rfbzip.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Checks whether UAC is enabled
  PID:1052

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/1052-3-0x00000000002E0000-0x000000000031D000-memory.dmp

Download

memory/1660-4-0x000007FEF5D50000-0x000007FEF5FCA000-memory.dmp