58176bec4e6793bbf62acfcaf20e7c14f181164ab38320cd8c51940a92607014

General

Target

ApplicationReject-887252173.xlsb
Size

1.1MB
MD5

b112fd7df986e3d613d78e630d3344e9
SHA1

fba85b4bd2447de4a9b1a36fced6aaafd40bcfa5
SHA256

66cd7db8994d7413e27ea4f3b1730e6e35e5deb0f2e2adebef9ae996edc61d20
SHA512

1d6ab3e12c42c5948091be2ca79410228b88c377b05a4144acde44e7b15bf15a4a8aa6e7dc6e66cf58096f92bc56c2f690c7fed8b9f9bc809f62e309add7e7c9

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://103.155.93.53/975035438.dat

xlm40.dropper

http://87.236.146.69/975035438.dat

xlm40.dropper

http://94.140.114.172/975035438.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 (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1620	872	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1644	872	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	556	872	Regsvr32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1568	872	Regsvr32.exe	EXCEL.EXE

Downloads MZ/PE file
Loads dropped DLL 1 IoCs

Processes:

Regsvr32.exe

pid process

1568 Regsvr32.exe
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

EXCEL.EXE

description ioc process

Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.EXE

pid	process
1568	Regsvr32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

872 EXCEL.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

872 EXCEL.EXE
872 EXCEL.EXE
872 EXCEL.EXE

pid	process
872	EXCEL.EXE

pid	process
872	EXCEL.EXE
872	EXCEL.EXE
872	EXCEL.EXE

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 872 wrote to memory of 1620	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1620	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1620	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1620	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1620	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1620	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1620	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1644	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1644	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1644	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1644	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1644	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1644	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1644	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 556	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 556	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 556	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 556	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 556	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 556	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 556	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1568	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1568	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1568	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1568	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1568	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1568	872	EXCEL.EXE	Regsvr32.exe
PID 872 wrote to memory of 1568	872	EXCEL.EXE	Regsvr32.exe

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\ApplicationReject-887252173.xlsb
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:872

C:\Windows\SysWOW64\Regsvr32.exe
Regsvr32 /s calc
2⤵
- Process spawned unexpected child process
PID:1620

C:\Windows\SysWOW64\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertu.ooccxx
2⤵
- Process spawned unexpected child process
PID:1644

C:\Windows\SysWOW64\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertua.ooccxx
2⤵
- Process spawned unexpected child process
PID:556

C:\Windows\SysWOW64\Regsvr32.exe
Regsvr32 C:\Rujiky\Ubada\Vertub.ooccxx
2⤵
- Process spawned unexpected child process
- Loads dropped DLL
PID:1568

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Rujiky\Ubada\Vertub.ooccxx
Filesize
962KB

MD5
b5de1af72fcdf348d2ef43e01ce3eaec

SHA1
d61a2809574fc84e953e04b320417eb88c4c87d0

SHA256
53ca9767b35e0f3a1a77623f8368a5ecee9aa4b1f9c295ae5416fa5cbd923190

SHA512
4b1cd98e82e6c66ad84cd6e595522d0a7420f837da5bcad3feaed10e4febcb4e48d8873277f8dd25e6772cea1a83ddf59b333de21a814ffc0f2751fa9b26362c

Download Submit
\Rujiky\Ubada\Vertub.ooccxx
Filesize
962KB

MD5
b5de1af72fcdf348d2ef43e01ce3eaec

SHA1
d61a2809574fc84e953e04b320417eb88c4c87d0

SHA256
53ca9767b35e0f3a1a77623f8368a5ecee9aa4b1f9c295ae5416fa5cbd923190

SHA512
4b1cd98e82e6c66ad84cd6e595522d0a7420f837da5bcad3feaed10e4febcb4e48d8873277f8dd25e6772cea1a83ddf59b333de21a814ffc0f2751fa9b26362c

Download Submit
memory/556-63-0x0000000000000000-mapping.dmp

Download
memory/872-54-0x000000002F761000-0x000000002F764000-memory.dmp

Filesize
12KB

Download
memory/872-55-0x0000000071391000-0x0000000071393000-memory.dmp

Filesize
8KB

Download
memory/872-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/872-57-0x00000000764C1000-0x00000000764C3000-memory.dmp

Filesize
8KB

Download
memory/872-58-0x000000007237D000-0x0000000072388000-memory.dmp

Filesize
44KB

Download
memory/1568-65-0x0000000000000000-mapping.dmp

Download
memory/1620-59-0x0000000000000000-mapping.dmp

Download
memory/1644-61-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads