3a37f7e6ea8438d60b6d28a20dcd1339184c8accc94da4cbd85ddcf484b837b2

General

Target

ApplicationReject-1569578342.xlsb
Size

1.1MB
MD5

00154117d2b253f1a013a1fc54bbf986
SHA1

68032866519db8b1254529955da2cba4d67cd09d
SHA256

e2529e34253ab3dd67cb90c5c4a407256f965621304761fde88f2c251d0fd470
SHA512

15e7c451662255b05b725b13d590910bc8ab9418945c1ee6768cdb6b0636687c9866d672e695e21b60a165ca9e9c3dcdf917942e6aae96fa5729dc364fcafbe4

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://103.155.93.53/625550515.dat

xlm40.dropper

http://87.236.146.69/625550515.dat

xlm40.dropper

http://94.140.114.172/625550515.dat

Signatures

Process spawned unexpected child process 4 IoCs

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

Processes:

Regsvr32.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	4308	4164	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3184	4164	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1420	4164	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3056	4164	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	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

4164 EXCEL.EXE

Suspicious use of SetWindowsHookEx 18 IoCs

Processes:

EXCEL.EXE

pid	process
4164	EXCEL.EXE
4164	EXCEL.EXE
4164	EXCEL.EXE
4164	EXCEL.EXE
4164	EXCEL.EXE
4164	EXCEL.EXE
4164	EXCEL.EXE
4164	EXCEL.EXE
4164	EXCEL.EXE
4164	EXCEL.EXE
4164	EXCEL.EXE
4164	EXCEL.EXE
4164	EXCEL.EXE
4164	EXCEL.EXE
4164	EXCEL.EXE
4164	EXCEL.EXE
4164	EXCEL.EXE
4164	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 4164 wrote to memory of 4308	4164	EXCEL.EXE	Regsvr32.exe
PID 4164 wrote to memory of 4308	4164	EXCEL.EXE	Regsvr32.exe
PID 4164 wrote to memory of 3184	4164	EXCEL.EXE	Regsvr32.exe
PID 4164 wrote to memory of 3184	4164	EXCEL.EXE	Regsvr32.exe
PID 4164 wrote to memory of 1420	4164	EXCEL.EXE	Regsvr32.exe
PID 4164 wrote to memory of 1420	4164	EXCEL.EXE	Regsvr32.exe
PID 4164 wrote to memory of 3056	4164	EXCEL.EXE	Regsvr32.exe
PID 4164 wrote to memory of 3056	4164	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\ApplicationReject-1569578342.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4164

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 /s calc
2⤵
- Process spawned unexpected child process
PID:4308

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertu.ooccxx
2⤵
- Process spawned unexpected child process
PID:3184

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertua.ooccxx
2⤵
- Process spawned unexpected child process
PID:1420

C:\Windows\SYSTEM32\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertub.ooccxx
2⤵
- Process spawned unexpected child process
PID:3056

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/1420-139-0x0000000000000000-mapping.dmp

Download
memory/3056-140-0x0000000000000000-mapping.dmp

Download
memory/3184-138-0x0000000000000000-mapping.dmp

Download
memory/4164-130-0x00007FFA9B690000-0x00007FFA9B6A0000-memory.dmp

Filesize
64KB

Download
memory/4164-131-0x00007FFA9B690000-0x00007FFA9B6A0000-memory.dmp

Filesize
64KB

Download
memory/4164-132-0x00007FFA9B690000-0x00007FFA9B6A0000-memory.dmp

Filesize
64KB

Download
memory/4164-133-0x00007FFA9B690000-0x00007FFA9B6A0000-memory.dmp

Filesize
64KB

Download
memory/4164-134-0x00007FFA9B690000-0x00007FFA9B6A0000-memory.dmp

Filesize
64KB

Download
memory/4164-135-0x00007FFA990C0000-0x00007FFA990D0000-memory.dmp

Filesize
64KB

Download
memory/4164-136-0x00007FFA990C0000-0x00007FFA990D0000-memory.dmp

Filesize
64KB

Download
memory/4308-137-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads