6eb7f2dcc632b6d5824e2b601de62e32181fc6e443b184581da531f5d9dbfba6

General

Target

Cancellation_Letter_49813862-02242021.xls
Size

144KB
MD5

cc80bd56850052e57c4bc0be1753abcf
SHA1

b20db5d5906632d8a33eced3efa9fb478f3ad085
SHA256

7be59273d824a97031e8519a0ec36ef9eed4c173427bce10cd9e2af54973d076
SHA512

b0f091bf1938a7ea26b8f93f2fe3e935e2b7564d4367d1673e3b187b563d269c0b47a94f76e3b7a4959b075f8d7a00d53977efaca2e18eaf2e11c035969e5062

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://jayshreewoods.com/kkcikakk/44252143816319500000.dat

xlm40.dropper

http://old.hprgroup.pl/ideerdst/44252143816319500000.dat

xlm40.dropper

http://youviral.in/nwkucot/44252143816319500000.dat

xlm40.dropper

http://foodszo.com/axwsaj/44252143816319500000.dat

xlm40.dropper

http://pactoporlaexcelenciaeducativa.mx/txaiuwgeayb/44252143816319500000.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	1124	1724	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	948	1724	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1056	1724	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	672	1724	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	316	1724	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
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	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 (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
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
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
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
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

1724 EXCEL.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1724 EXCEL.EXE
1724 EXCEL.EXE
1724 EXCEL.EXE

pid	process
1724	EXCEL.EXE

pid	process
1724	EXCEL.EXE
1724	EXCEL.EXE
1724	EXCEL.EXE

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1724 wrote to memory of 1124	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 1124	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 1124	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 1124	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 1124	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 1124	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 1124	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 948	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 948	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 948	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 948	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 948	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 948	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 948	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 1056	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 1056	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 1056	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 1056	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 1056	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 1056	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 1056	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 672	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 672	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 672	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 672	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 672	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 672	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 672	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 316	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 316	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 316	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 316	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 316	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 316	1724	EXCEL.EXE	rundll32.exe
PID 1724 wrote to memory of 316	1724	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_49813862-02242021.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1724

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1124

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:948

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1056

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR3,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:672

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR4,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:316

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/316-14-0x0000000000000000-mapping.dmp

Download
memory/672-12-0x0000000000000000-mapping.dmp

Download
memory/948-8-0x0000000000000000-mapping.dmp

Download
memory/1056-10-0x0000000000000000-mapping.dmp

Download
memory/1124-6-0x0000000000000000-mapping.dmp

Download
memory/1124-7-0x00000000761E1000-0x00000000761E3000-memory.dmp

Filesize
8KB

Download
memory/1168-5-0x000007FEF7D90000-0x000007FEF800A000-memory.dmp

Filesize
2.5MB

Download
memory/1724-2-0x000000002F4B1000-0x000000002F4B4000-memory.dmp

Filesize
12KB

Download
memory/1724-3-0x0000000071C61000-0x0000000071C63000-memory.dmp

Filesize
8KB

Download
memory/1724-4-0x000000005FFF0000-0x0000000060000000-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