dridex | 7bbe546e2f5367c00bb05a53f122756098df9c75019167455c3bffa73e11a7e1

Analysis

max time kernel
20s
max time network
24s
platform
windows7_x64
resource
win7-en-20210920
submitted
21-10-2021 19:06

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General

Target

5_System.Numerics.dll
Size

180KB
MD5

4aa41378b7c700010b1a3ec72a588306
SHA1

3d9ca1eb8a16c0350c233f291c399b177cccc980
SHA256

7bbe546e2f5367c00bb05a53f122756098df9c75019167455c3bffa73e11a7e1
SHA512

aa61fce6f9430580cd5c8f4a9b1d7d9781b96371cd4da00a4ed4bf6c16c872b6d20f291663bbd0a8ab84f1ed9e5bd8e2f4558395150f764e94648d9c05d94eee

Score

10^/10

dridex 22201 botnet loader

Malware Config

Extracted

Family

dridex

Botnet

22201

212.237.17.99:443

176.28.17.160:6602

51.254.140.238:8333

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/1116-55-0x00000000746C0000-0x00000000746EF000-memory.dmp	dridex_ldr

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

960 1116 WerFault.exe rundll32.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

WerFault.exe

pid process

960 WerFault.exe
960 WerFault.exe
960 WerFault.exe
960 WerFault.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WerFault.exe

description pid process

Token: SeDebugPrivilege 960 WerFault.exe

pid	pid_target	process	target process
960	1116	WerFault.exe	rundll32.exe

pid	process
960	WerFault.exe
960	WerFault.exe
960	WerFault.exe
960	WerFault.exe

description	pid	process
Token: SeDebugPrivilege	960	WerFault.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1200 wrote to memory of 1116	1200	rundll32.exe	rundll32.exe
PID 1200 wrote to memory of 1116	1200	rundll32.exe	rundll32.exe
PID 1200 wrote to memory of 1116	1200	rundll32.exe	rundll32.exe
PID 1200 wrote to memory of 1116	1200	rundll32.exe	rundll32.exe
PID 1200 wrote to memory of 1116	1200	rundll32.exe	rundll32.exe
PID 1200 wrote to memory of 1116	1200	rundll32.exe	rundll32.exe
PID 1200 wrote to memory of 1116	1200	rundll32.exe	rundll32.exe
PID 1116 wrote to memory of 960	1116	rundll32.exe	WerFault.exe
PID 1116 wrote to memory of 960	1116	rundll32.exe	WerFault.exe
PID 1116 wrote to memory of 960	1116	rundll32.exe	WerFault.exe
PID 1116 wrote to memory of 960	1116	rundll32.exe	WerFault.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5_System.Numerics.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1200

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5_System.Numerics.dll,#1
2⤵
- Suspicious use of WriteProcessMemory
PID:1116

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1116 -s 252
3⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:960

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/960-57-0x0000000000000000-mapping.dmp

Download
memory/960-59-0x0000000002280000-0x0000000002281000-memory.dmp

Filesize
4KB

Download
memory/1116-53-0x0000000000000000-mapping.dmp

Download
memory/1116-54-0x00000000751A1000-0x00000000751A3000-memory.dmp

Filesize
8KB

Download
memory/1116-55-0x00000000746C0000-0x00000000746EF000-memory.dmp

Filesize
188KB

Download
memory/1116-58-0x00000000000C0000-0x00000000000C6000-memory.dmp

Filesize
24KB

Download