dridex | fa8ed75cfc69a06cf1e809531f7371b5c75fd480339ae65568785b76387ceaa0

General

Target

1 Total New Invoices-Thursday January 21 2021.xlsm
Size

30KB
MD5

a47b6adc87b8000c91a706d3c5ed540f
SHA1

5337c9cd3d3813178bd5e7d1e1334ab973bdbb3f
SHA256

fa8ed75cfc69a06cf1e809531f7371b5c75fd480339ae65568785b76387ceaa0
SHA512

4c703218126a95120b28b5679739eca637700e0847878b83a844f494434f5a05bb3ca739cbe4b8fd45e1fff42d4aaeaa4588a01c4c3f307284c94b1a79eda172

Score

10^/10

dridex 10444 botnet loader

Malware Config

Extracted

Family

dridex

Botnet

10444

C2

194.225.58.214:443

211.110.44.63:5353

69.164.207.140:3388

198.57.200.100:3786

rc4.plain

Signatures

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

Process spawned unexpected child process 2 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

regsvr32.exeregsvr32.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3992	648	regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3644	648	regsvr32.exe	EXCEL.EXE

Dridex Loader 3 IoCs

Detects Dridex both x86 and x64 loader in memory.

botnet loader

Processes:

resource	yara_rule
behavioral2/memory/504-12-0x0000000074320000-0x000000007435D000-memory.dmp	dridex_ldr
behavioral2/memory/504-13-0x0000000074320000-0x000000007435D000-memory.dmp	dridex_ldr
behavioral2/memory/504-15-0x0000000074320000-0x000000007435D000-memory.dmp	dridex_ldr

Loads dropped DLL 1 IoCs

Processes:

regsvr32.exe

pid process

504 regsvr32.exe

pid	process
504	regsvr32.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

648 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

648 EXCEL.EXE
648 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE
648	EXCEL.EXE

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

EXCEL.EXEregsvr32.exe

description	pid	process	target process
PID 648 wrote to memory of 3992	648	EXCEL.EXE	regsvr32.exe
PID 648 wrote to memory of 3992	648	EXCEL.EXE	regsvr32.exe
PID 648 wrote to memory of 3644	648	EXCEL.EXE	regsvr32.exe
PID 648 wrote to memory of 3644	648	EXCEL.EXE	regsvr32.exe
PID 3644 wrote to memory of 504	3644	regsvr32.exe	regsvr32.exe
PID 3644 wrote to memory of 504	3644	regsvr32.exe	regsvr32.exe
PID 3644 wrote to memory of 504	3644	regsvr32.exe	regsvr32.exe

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\1 Total New Invoices-Thursday January 21 2021.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:648

C:\Windows\System32\regsvr32.exe
"C:\Windows\System32\regsvr32.exe" -s C:\Users\Admin\AppData\Local\Temp\mtdkofoi.dll
2⤵
- Process spawned unexpected child process
PID:3992

C:\Windows\System32\regsvr32.exe
"C:\Windows\System32\regsvr32.exe" -s C:\Users\Admin\AppData\Local\Temp\mtdkofoi.dll
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:3644

C:\Windows\SysWOW64\regsvr32.exe
-s C:\Users\Admin\AppData\Local\Temp\mtdkofoi.dll
3⤵
- Loads dropped DLL
PID:504

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\mtdkofoi.dll
MD5
b987ba911cf1217e83778e71df3182c8

SHA1
842bcedd76890326ca5552010c5c3dc9d0b4c0e7

SHA256
a9653dacc87403855ff752ff34c6913f5c4f0aec5bfe2c83f95151c9e13d5ba4

SHA512
ed5ed5028549ba0b9877b9524ad70e24e49c30fd43076e13bc20a8b92c3d7bdba11219607fd7487b6650842b02f4e22f723657491acafd292cb363232e069844

Download Submit
\Users\Admin\AppData\Local\Temp\mtdkofoi.dll
MD5
b987ba911cf1217e83778e71df3182c8

SHA1
842bcedd76890326ca5552010c5c3dc9d0b4c0e7

SHA256
a9653dacc87403855ff752ff34c6913f5c4f0aec5bfe2c83f95151c9e13d5ba4

SHA512
ed5ed5028549ba0b9877b9524ad70e24e49c30fd43076e13bc20a8b92c3d7bdba11219607fd7487b6650842b02f4e22f723657491acafd292cb363232e069844

Download Submit
memory/504-15-0x0000000074320000-0x000000007435D000-memory.dmp

Filesize
244KB

Download
memory/504-14-0x0000000000680000-0x0000000000681000-memory.dmp

Filesize
4KB

Download
memory/504-13-0x0000000074320000-0x000000007435D000-memory.dmp

Filesize
244KB

Download
memory/504-12-0x0000000074320000-0x000000007435D000-memory.dmp

Filesize
244KB

Download
memory/504-10-0x0000000000000000-mapping.dmp

Download
memory/648-5-0x00007FF851A60000-0x00007FF852097000-memory.dmp

Filesize
6.2MB

Download
memory/648-6-0x00007FF82D760000-0x00007FF82D770000-memory.dmp

Filesize
64KB

Download
memory/648-2-0x00007FF82D760000-0x00007FF82D770000-memory.dmp

Filesize
64KB

Download
memory/648-4-0x00007FF82D760000-0x00007FF82D770000-memory.dmp

Filesize
64KB

Download
memory/648-3-0x00007FF82D760000-0x00007FF82D770000-memory.dmp

Filesize
64KB

Download
memory/3644-8-0x0000000000000000-mapping.dmp

Download
memory/3992-7-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads