1ab2ff7a6ddcd4a3c8bec255b23abe1e817a12b5c716d3115848fa06e2630c21

General

Target

Cancellation_Letter_907142302-02242021.xls
Size

144KB
MD5

8aec18ebf6993b6fef422faf10b7d2a3
SHA1

170818aedbf5aa2cd7e09d3f7191ec77dd3b9532
SHA256

20ae15df23e6fbb766575da4b6dd854020725eab7ccff4194cc36dd0adb23763
SHA512

f1bf8ce8405ca7b211373768f1f4e77debdf5e3a976c95dd3378d530b428c069056d477407f466e930cd8a4e7773e10d83738b213de40125fad0953c3b615db0

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://slmtv.com/tfbgl/44252144191666700000.dat

xlm40.dropper

http://dicomm-001-site35.ctempurl.com/pmslsda/44252144191666700000.dat

xlm40.dropper

http://konyahaberler.xyz/hxjxxwav/44252144191666700000.dat

xlm40.dropper

http://pandsquinny.com/nlbzyhfs/44252144191666700000.dat

xlm40.dropper

http://www.kunjincompany.com/anesrq/44252144191666700000.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	952	1932	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	924	1932	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1916	1932	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1540	1932	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1080	1932	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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\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-1-5-21-3825035466-2522850611-591511364-1000\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

1932 EXCEL.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1932 EXCEL.EXE
1932 EXCEL.EXE
1932 EXCEL.EXE

pid	process
1932	EXCEL.EXE

pid	process
1932	EXCEL.EXE
1932	EXCEL.EXE
1932	EXCEL.EXE

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1932 wrote to memory of 952	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 952	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 952	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 952	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 952	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 952	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 952	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 924	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 924	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 924	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 924	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 924	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 924	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 924	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1916	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1916	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1916	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1916	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1916	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1916	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1916	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1540	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1540	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1540	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1540	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1540	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1540	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1540	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1080	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1080	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1080	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1080	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1080	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1080	1932	EXCEL.EXE	rundll32.exe
PID 1932 wrote to memory of 1080	1932	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_907142302-02242021.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1932

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:952

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:924

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1916

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR3,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1540

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR4,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1080

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/924-8-0x0000000000000000-mapping.dmp

Download
memory/952-6-0x0000000000000000-mapping.dmp

Download
memory/952-7-0x00000000750C1000-0x00000000750C3000-memory.dmp

Filesize
8KB

Download
memory/1080-14-0x0000000000000000-mapping.dmp

Download
memory/1540-12-0x0000000000000000-mapping.dmp

Download
memory/1892-5-0x000007FEF6E90000-0x000007FEF710A000-memory.dmp

Filesize
2.5MB

Download
memory/1916-10-0x0000000000000000-mapping.dmp

Download
memory/1932-2-0x000000002F1D1000-0x000000002F1D4000-memory.dmp

Filesize
12KB

Download
memory/1932-3-0x0000000070BA1000-0x0000000070BA3000-memory.dmp

Filesize
8KB

Download
memory/1932-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads