e2a376d63b1561324cfd9f73d00cbf319a2296a255a18469b82d986f0f323f79

General

Target

2226726056.xlsb
Size

1.0MB
MD5

58e873b384743f67dce82012e7215a99
SHA1

2c89b1b4ec71da38747ce550fdbd3c08da28ca16
SHA256

2ffaa815fc7b7b08d66842936025274d08ddbbd38a8478205fed86ece8848650
SHA512

312b2aeea61ee6c0d10acae9c163095c8ef0f56953f4ad15350eee82023f6ce4612c17f89fb46e37a920e8b260ba3fc54d6d12c20b1d36ef468f99da4742ab71

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://23.227.199.109/44695.6679987269.dat

xlm40.dropper

http://77.91.101.69/44695.6679987269.dat

xlm40.dropper

http://94.140.114.226/44695.6679987269.dat

Signatures

Process spawned unexpected child process 5 IoCs

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

Processes:

Regsvr32.exeRegsvr32.exeRegsvr32.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	3440	4200	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3840	4200	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4416	4200	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3852	4200	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1408	4200	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

4200 EXCEL.EXE

Suspicious use of SetWindowsHookEx 15 IoCs

Processes:

EXCEL.EXE

pid	process
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE
4200	EXCEL.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 4200 wrote to memory of 3440	4200	EXCEL.EXE	Regsvr32.exe
PID 4200 wrote to memory of 3440	4200	EXCEL.EXE	Regsvr32.exe
PID 4200 wrote to memory of 3840	4200	EXCEL.EXE	Regsvr32.exe
PID 4200 wrote to memory of 3840	4200	EXCEL.EXE	Regsvr32.exe
PID 4200 wrote to memory of 4416	4200	EXCEL.EXE	Regsvr32.exe
PID 4200 wrote to memory of 4416	4200	EXCEL.EXE	Regsvr32.exe
PID 4200 wrote to memory of 3852	4200	EXCEL.EXE	Regsvr32.exe
PID 4200 wrote to memory of 3852	4200	EXCEL.EXE	Regsvr32.exe
PID 4200 wrote to memory of 1408	4200	EXCEL.EXE	Regsvr32.exe
PID 4200 wrote to memory of 1408	4200	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\2226726056.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4200

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 /s calc
2⤵
- Process spawned unexpected child process
PID:3440

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\ProgramData\Teris.OOOCCCXXX
2⤵
- Process spawned unexpected child process
PID:3840

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\ProgramData\Terisa.OOOCCCXXX
2⤵
- Process spawned unexpected child process
PID:4416

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\ProgramData\Terisb.OOOCCCXXX
2⤵
- Process spawned unexpected child process
PID:3852

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 /s calc
2⤵
- Process spawned unexpected child process
PID:1408

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/1408-141-0x0000000000000000-mapping.dmp

Download
memory/3440-137-0x0000000000000000-mapping.dmp

Download
memory/3840-138-0x0000000000000000-mapping.dmp

Download
memory/3852-140-0x0000000000000000-mapping.dmp

Download
memory/4200-130-0x00007FFDAE3F0000-0x00007FFDAE400000-memory.dmp

Filesize
64KB

Download
memory/4200-131-0x00007FFDAE3F0000-0x00007FFDAE400000-memory.dmp

Filesize
64KB

Download
memory/4200-132-0x00007FFDAE3F0000-0x00007FFDAE400000-memory.dmp

Filesize
64KB

Download
memory/4200-133-0x00007FFDAE3F0000-0x00007FFDAE400000-memory.dmp

Filesize
64KB

Download
memory/4200-134-0x00007FFDAE3F0000-0x00007FFDAE400000-memory.dmp

Filesize
64KB

Download
memory/4200-135-0x00007FFDAC1E0000-0x00007FFDAC1F0000-memory.dmp

Filesize
64KB

Download
memory/4200-136-0x00007FFDAC1E0000-0x00007FFDAC1F0000-memory.dmp

Filesize
64KB

Download
memory/4416-139-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads