bc29b497a95f0daba324ee877dca4b354b31d6179117ac1afb8f17d354358036

General

Target

Complaint-818191704-10012021.xls
Size

129KB
MD5

4867eebf4c3f7ee6b532e703d20d5585
SHA1

d772036f1ca3eab516f016aa5073ffc2a65142f4
SHA256

67173a667baf38b78448f969bcb53892536ddc279528553cadbf0a53d1637d5d
SHA512

4b7ccb534a546b70f2453bf2dc456a8cc6a384cdb3f511a55bcaa933a4d2617cfcf1d0871add4d64d5037c762b805f4effafbe7395499be9266a3dc508e04662

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://101.99.90.18/44470.7501645833.dat

xlm40.dropper

http://194.36.191.19/44470.7501645833.dat

xlm40.dropper

http://45.144.29.109/44470.7501645833.dat

Signatures

Process spawned unexpected child process 3 IoCs

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

Processes:

regsvr32.exeregsvr32.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	2700	1104	regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3952	1104	regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1232	1104	regsvr32.exe	EXCEL.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

1104 EXCEL.EXE

Suspicious use of SetWindowsHookEx 16 IoCs

Processes:

EXCEL.EXE

pid	process
1104	EXCEL.EXE
1104	EXCEL.EXE
1104	EXCEL.EXE
1104	EXCEL.EXE
1104	EXCEL.EXE
1104	EXCEL.EXE
1104	EXCEL.EXE
1104	EXCEL.EXE
1104	EXCEL.EXE
1104	EXCEL.EXE
1104	EXCEL.EXE
1104	EXCEL.EXE
1104	EXCEL.EXE
1104	EXCEL.EXE
1104	EXCEL.EXE
1104	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1104 wrote to memory of 2700	1104	EXCEL.EXE	regsvr32.exe
PID 1104 wrote to memory of 2700	1104	EXCEL.EXE	regsvr32.exe
PID 1104 wrote to memory of 3952	1104	EXCEL.EXE	regsvr32.exe
PID 1104 wrote to memory of 3952	1104	EXCEL.EXE	regsvr32.exe
PID 1104 wrote to memory of 1232	1104	EXCEL.EXE	regsvr32.exe
PID 1104 wrote to memory of 1232	1104	EXCEL.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\Complaint-818191704-10012021.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1104

C:\Windows\SYSTEM32\regsvr32.exe
regsvr32 -silent ..\Drezd.red
2⤵
- Process spawned unexpected child process
PID:2700

C:\Windows\SYSTEM32\regsvr32.exe
regsvr32 -silent ..\Drezd.red1
2⤵
- Process spawned unexpected child process
PID:3952

C:\Windows\SYSTEM32\regsvr32.exe
regsvr32 -silent ..\Drezd.red2
2⤵
- Process spawned unexpected child process
PID:1232

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

memory/1104-114-0x00007FF6B4390000-0x00007FF6B7946000-memory.dmp

Filesize
53.7MB

Download
memory/1104-115-0x00007FF861870000-0x00007FF861880000-memory.dmp

Filesize
64KB

Download
memory/1104-116-0x00007FF861870000-0x00007FF861880000-memory.dmp

Filesize
64KB

Download
memory/1104-117-0x00007FF861870000-0x00007FF861880000-memory.dmp

Filesize
64KB

Download
memory/1104-118-0x00007FF861870000-0x00007FF861880000-memory.dmp

Filesize
64KB

Download
memory/1104-121-0x00007FF861870000-0x00007FF861880000-memory.dmp

Filesize
64KB

Download
memory/1104-122-0x00007FF883930000-0x00007FF884A1E000-memory.dmp

Filesize
16.9MB

Download
memory/1104-123-0x00007FF881A30000-0x00007FF883925000-memory.dmp

Filesize
31.0MB

Download
memory/1104-292-0x000002BAEB930000-0x000002BAEB934000-memory.dmp

Filesize
16KB

Download
memory/1232-295-0x0000000000000000-mapping.dmp

Download
memory/2700-293-0x0000000000000000-mapping.dmp

Download
memory/3952-294-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads