dridex | 55cbb43aad59d149ba4bc06684771b5d87a3f570da165437c4d07d442d4b8db7

General

Target

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

30KB
MD5

d89d70ee6809ef93910bfbf10c4caf94
SHA1

5e8d4db8464fd6d427d5987ae6cb017ceac13839
SHA256

55cbb43aad59d149ba4bc06684771b5d87a3f570da165437c4d07d442d4b8db7
SHA512

c5eb5a46edb4cf9a7eeeb7e945665f9091d2b536310d5e4de54d47fca8690821c28c004a4677daae1273911f8e60d467cd8424f2e7e23e12f20ac589bb6d5073

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	1172	4052	regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2032	4052	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/3456-12-0x0000000073B50000-0x0000000073B8D000-memory.dmp	dridex_ldr
behavioral2/memory/3456-13-0x0000000073B50000-0x0000000073B8D000-memory.dmp	dridex_ldr
behavioral2/memory/3456-15-0x0000000073B50000-0x0000000073B8D000-memory.dmp	dridex_ldr

Loads dropped DLL 1 IoCs

Processes:

regsvr32.exe

pid process

3456 regsvr32.exe

pid	process
3456	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

4052 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
4052	EXCEL.EXE
4052	EXCEL.EXE
4052	EXCEL.EXE
4052	EXCEL.EXE
4052	EXCEL.EXE
4052	EXCEL.EXE
4052	EXCEL.EXE
4052	EXCEL.EXE
4052	EXCEL.EXE
4052	EXCEL.EXE
4052	EXCEL.EXE
4052	EXCEL.EXE

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

EXCEL.EXEregsvr32.exe

description	pid	process	target process
PID 4052 wrote to memory of 1172	4052	EXCEL.EXE	regsvr32.exe
PID 4052 wrote to memory of 1172	4052	EXCEL.EXE	regsvr32.exe
PID 4052 wrote to memory of 2032	4052	EXCEL.EXE	regsvr32.exe
PID 4052 wrote to memory of 2032	4052	EXCEL.EXE	regsvr32.exe
PID 2032 wrote to memory of 3456	2032	regsvr32.exe	regsvr32.exe
PID 2032 wrote to memory of 3456	2032	regsvr32.exe	regsvr32.exe
PID 2032 wrote to memory of 3456	2032	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 SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4052

C:\Windows\System32\regsvr32.exe
"C:\Windows\System32\regsvr32.exe" -s C:\Users\Admin\AppData\Local\Temp\srxnci.dll
2⤵
- Process spawned unexpected child process
PID:1172

C:\Windows\System32\regsvr32.exe
"C:\Windows\System32\regsvr32.exe" -s C:\Users\Admin\AppData\Local\Temp\srxnci.dll
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:2032

C:\Windows\SysWOW64\regsvr32.exe
-s C:\Users\Admin\AppData\Local\Temp\srxnci.dll
3⤵
- Loads dropped DLL
PID:3456

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\srxnci.dll
MD5
002c56165a0e78369d0e1023ce044bf0

SHA1
78ebfe4167a851bc75d9702aa1aea5efe1514b0c

SHA256
a5ffce2a8d98ddc0ccc20744e88443eac323caf1cd8a218b8ccd50bc5ab8f1ac

SHA512
bb6796d16c54e3521b4207323e7f774f9469d80b7aeb1d270b9f45034dd26ca801d9f8ed5130994ee0c7e35e084b33b7a90e6eef6295be4b53cf77a61c927d2a

Download Submit
\Users\Admin\AppData\Local\Temp\srxnci.dll
MD5
002c56165a0e78369d0e1023ce044bf0

SHA1
78ebfe4167a851bc75d9702aa1aea5efe1514b0c

SHA256
a5ffce2a8d98ddc0ccc20744e88443eac323caf1cd8a218b8ccd50bc5ab8f1ac

SHA512
bb6796d16c54e3521b4207323e7f774f9469d80b7aeb1d270b9f45034dd26ca801d9f8ed5130994ee0c7e35e084b33b7a90e6eef6295be4b53cf77a61c927d2a

Download Submit
memory/1172-7-0x0000000000000000-mapping.dmp

Download
memory/2032-8-0x0000000000000000-mapping.dmp

Download
memory/3456-10-0x0000000000000000-mapping.dmp

Download
memory/3456-12-0x0000000073B50000-0x0000000073B8D000-memory.dmp

Filesize
244KB

Download
memory/3456-13-0x0000000073B50000-0x0000000073B8D000-memory.dmp

Filesize
244KB

Download
memory/3456-14-0x0000000004470000-0x0000000004471000-memory.dmp

Filesize
4KB

Download
memory/3456-15-0x0000000073B50000-0x0000000073B8D000-memory.dmp

Filesize
244KB

Download
memory/4052-6-0x00007FFE0C220000-0x00007FFE0C230000-memory.dmp

Filesize
64KB

Download
memory/4052-5-0x00007FFE2FBA0000-0x00007FFE301D7000-memory.dmp

Filesize
6.2MB

Download
memory/4052-2-0x00007FFE0C220000-0x00007FFE0C230000-memory.dmp

Filesize
64KB

Download
memory/4052-4-0x00007FFE0C220000-0x00007FFE0C230000-memory.dmp

Filesize
64KB

Download
memory/4052-3-0x00007FFE0C220000-0x00007FFE0C230000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads