88f72155fbaa095cc2ceee5c46e1b3442ba5d476784fa0a3d9484dc0cbcc2ff2

General

Target

Complaint-Letter-699160903-03102021.xls
Size

281KB
MD5

7c29aaed776bb470e5a2f0569ea44d12
SHA1

1e33673add979088a223dd337cea0c974e4dc296
SHA256

85f8f00fc5d2e2de62c0c37cec012e0c8516ec1a83d82056e89fcb38b51bb963
SHA512

a9b852c5a859640121c7b34286879085f15c9dbb0b1fe9705f6f6dc380f46c4a9ebabea79a9b6ae7a943a2a05228881794ffa2e8f25da6e77ff0d54fd55db8c4

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://oracledispatch.com/pijxju/44266.1461440972.dat

xlm40.dropper

http://alvaelectrical.ir/jfvrrvwxrsv/44266.1461440972.dat

xlm40.dropper

http://www.bekagayrimenkul.com/xtgudsvqubbk/44266.1461440972.dat

xlm40.dropper

http://civil-group.ir/rvnhdtkyxgu/44266.1461440972.dat

xlm40.dropper

http://kumarpropack.com/jdvcnedwvpr/44266.1461440972.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	1092	1656	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1764	1656	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	528	1656	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1232	1656	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	748	1656	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
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
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
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\Toolbar	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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1656 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

1656 EXCEL.EXE
1656 EXCEL.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1656 EXCEL.EXE
1656 EXCEL.EXE
1656 EXCEL.EXE

pid	process
1656	EXCEL.EXE

pid	process
1656	EXCEL.EXE
1656	EXCEL.EXE

pid	process
1656	EXCEL.EXE
1656	EXCEL.EXE
1656	EXCEL.EXE

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1656 wrote to memory of 1092	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1092	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1092	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1092	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1092	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1092	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1092	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1764	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1764	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1764	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1764	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1764	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1764	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1764	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 528	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 528	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 528	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 528	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 528	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 528	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 528	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1232	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1232	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1232	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1232	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1232	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1232	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 1232	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 748	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 748	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 748	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 748	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 748	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 748	1656	EXCEL.EXE	rundll32.exe
PID 1656 wrote to memory of 748	1656	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\Complaint-Letter-699160903-03102021.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1656

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1092

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1764

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:528

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok3,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1232

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\Runtime.brok4,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:748

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

memory/528-10-0x0000000000000000-mapping.dmp

Download
memory/576-5-0x000007FEF7BD0000-0x000007FEF7E4A000-memory.dmp

Filesize
2.5MB

Download
memory/748-14-0x0000000000000000-mapping.dmp

Download
memory/1092-6-0x0000000000000000-mapping.dmp

Download
memory/1092-7-0x00000000765A1000-0x00000000765A3000-memory.dmp

Filesize
8KB

Download
memory/1232-12-0x0000000000000000-mapping.dmp

Download
memory/1656-2-0x000000002FED1000-0x000000002FED4000-memory.dmp

Filesize
12KB

Download
memory/1656-3-0x0000000071A81000-0x0000000071A83000-memory.dmp

Filesize
8KB

Download
memory/1656-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1764-8-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads