4c6dcbefc272d8ff6cd6276398c960c1f765219b62bfc299289e90f38e8f34cc

General

Target

Cancellation_Letter_217264958-02242021.xls
Size

144KB
MD5

389468f5a4fe1158686489601158c933
SHA1

0bc2d33169724e8783b16b7ac4cf3664b8110ee0
SHA256

4c6dcbefc272d8ff6cd6276398c960c1f765219b62bfc299289e90f38e8f34cc
SHA512

fcebe3686bd601bfa5dec9e8a5c766ad8ebc5ca5568c429ed436505a0af08a1dffca30e3aa6d5ff7d8ee3558ba0f86584ab2c7e76005d5ac9a2c66efc384df50

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://eventpeople.pro/cfuizfotpz/44251796295601900000.dat

xlm40.dropper

http://ledia.shop:80/dwwzeqw/44251796295601900000.dat

xlm40.dropper

http://jttires.com/ykcfoknw/44251796295601900000.dat

xlm40.dropper

http://dnvillas.com/ncmlzqphuqma/44251796295601900000.dat

xlm40.dropper

http://meta.group/ffbupgnegjy/44251796295601900000.dat

Signatures

Process spawned unexpected child process 5 IoCs

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

Processes:

rundll32.exerundll32.exerundll32.exerundll32.exerundll32.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	924	548	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	868	548	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1512	548	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	544	548	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	556	548	rundll32.exe	EXCEL.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

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
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

548 EXCEL.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

548 EXCEL.EXE
548 EXCEL.EXE
548 EXCEL.EXE

pid	process
548	EXCEL.EXE

pid	process
548	EXCEL.EXE
548	EXCEL.EXE
548	EXCEL.EXE

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 548 wrote to memory of 924	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 924	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 924	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 924	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 924	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 924	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 924	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 868	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 868	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 868	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 868	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 868	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 868	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 868	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 1512	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 1512	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 1512	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 1512	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 1512	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 1512	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 1512	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 544	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 544	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 544	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 544	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 544	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 544	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 544	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 556	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 556	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 556	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 556	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 556	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 556	548	EXCEL.EXE	rundll32.exe
PID 548 wrote to memory of 556	548	EXCEL.EXE	rundll32.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\Cancellation_Letter_217264958-02242021.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:548

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:924

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:868

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1512

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR3,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:544

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR4,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:556

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

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Downloads

memory/544-12-0x0000000000000000-mapping.dmp

Download
memory/548-2-0x000000002F591000-0x000000002F594000-memory.dmp

Filesize
12KB

Download
memory/548-3-0x0000000071AA1000-0x0000000071AA3000-memory.dmp

Filesize
8KB

Download
memory/548-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/556-14-0x0000000000000000-mapping.dmp

Download
memory/868-8-0x0000000000000000-mapping.dmp

Download
memory/924-6-0x0000000000000000-mapping.dmp

Download
memory/924-7-0x0000000076451000-0x0000000076453000-memory.dmp

Filesize
8KB

Download
memory/1512-10-0x0000000000000000-mapping.dmp

Download
memory/1724-5-0x000007FEF8800000-0x000007FEF8A7A000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads