5f2adacaf4ecb00ed24dd9dfe355307d0d6e786e40c945ad4c6d1ae3a4835d2a

Target

Doc_3744.xls
Size

62KB
MD5

47e22049644647ee854cedfe077156e7
SHA1

20ad9f47616a8272dece2ec1039a88c09412c97c
SHA256

5f2adacaf4ecb00ed24dd9dfe355307d0d6e786e40c945ad4c6d1ae3a4835d2a
SHA512

1eeb87173378f4d0e157ee42f5b28e48ff84a35b44d71f004a6180cc2bdbc09e45c071adc7ab0a94c75071fbe3ee13b939ee8cb216b6f2e06c9c24ca34dbbf1b

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

https://hrdgschool.com/logs.php

Signatures

Process spawned unexpected child process 2 IoCs

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

Processes:

reg.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	1292	1832	reg.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1260	1832	rundll32.exe	EXCEL.EXE

Deletes itself 1 IoCs

Processes:

EXCEL.EXE

pid process

1832 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-1-5-21-293278959-2699126792-324916226-1000\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\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
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 (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\MenuExt	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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1832 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

1832 EXCEL.EXE
1832 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
1832	EXCEL.EXE
1832	EXCEL.EXE
1832	EXCEL.EXE
1832	EXCEL.EXE
1832	EXCEL.EXE
1832	EXCEL.EXE
1832	EXCEL.EXE
1832	EXCEL.EXE
1832	EXCEL.EXE
1832	EXCEL.EXE
1832	EXCEL.EXE
1832	EXCEL.EXE
1832	EXCEL.EXE
1832	EXCEL.EXE

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1832 wrote to memory of 1292	1832	EXCEL.EXE	reg.exe
PID 1832 wrote to memory of 1292	1832	EXCEL.EXE	reg.exe
PID 1832 wrote to memory of 1292	1832	EXCEL.EXE	reg.exe
PID 1832 wrote to memory of 1292	1832	EXCEL.EXE	reg.exe
PID 1832 wrote to memory of 1260	1832	EXCEL.EXE	rundll32.exe
PID 1832 wrote to memory of 1260	1832	EXCEL.EXE	rundll32.exe
PID 1832 wrote to memory of 1260	1832	EXCEL.EXE	rundll32.exe
PID 1832 wrote to memory of 1260	1832	EXCEL.EXE	rundll32.exe
PID 1832 wrote to memory of 1260	1832	EXCEL.EXE	rundll32.exe
PID 1832 wrote to memory of 1260	1832	EXCEL.EXE	rundll32.exe
PID 1832 wrote to memory of 1260	1832	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\Doc_3744.xls
1⤵
- Deletes itself
- 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:1832
- C:\Windows\SysWOW64\reg.exe
  "C:\Windows\system32\reg.exe" EXPORT HKCU\Software\Microsoft\Office\14.0\Excel\Security C:\Users\Public\Documents\icSz4h.txt /y
  2⤵
  - Process spawned unexpected child process
  PID:1292
- C:\Windows\SysWOW64\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Users\Public\Documents\f4myZ.txt,DllRegisterServer
  2⤵
  - Process spawned unexpected child process
  PID:1260

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Public\Documents\f4myZ.txt

MD5
6a94bbe7bd7fc8ba685da404a9440006

SHA1
48e83c39b373b1d0b1bcf94f57dac0afbd70517b

SHA256
5a49c4743ed4e6c66817818cda33bcfb4ce423bffc496129d88980c0b579d859

SHA512
f5ee2560c9477c1016c2774a5e384148d1fa7dc15bbaaedf16da0a765228f1e2a997d9315eb7a989019537a65d4e1afaad7784cabd4cbd8130270df8560b0f8a

Download Submit
C:\Users\Public\Documents\icSz4h.txt

MD5
1084b35cb1aecef496dfdb263760a40c

SHA1
43d95f062749f3143838fe39460b3c5d541e194a

SHA256
48ccd7a8ed9873ff73eec7252ed9ce2882389aa43a5ec5ad072168c43320b25c

SHA512
9dbcfe0f39e04700f252b95cfb73a7977fe7a2ffe8de98510c9f62988300754c4e8eeb0a152ad87db71b28ee8c2fcb97d136215d2898ccbee5b8837a31eb7212

Download Submit
memory/1048-9-0x000007FEF7880000-0x000007FEF7AFA000-memory.dmp

Filesize
2.5MB

Download
memory/1260-10-0x0000000000000000-mapping.dmp

Download
memory/1292-7-0x0000000000000000-mapping.dmp

Download
memory/1832-2-0x000000002F091000-0x000000002F094000-memory.dmp

Filesize
12KB

Download
memory/1832-3-0x00000000717F1000-0x00000000717F3000-memory.dmp

Filesize
8KB

Download
memory/1832-4-0x0000000076371000-0x0000000076373000-memory.dmp

Filesize
8KB

Download
memory/1832-5-0x000000006D151000-0x000000006D153000-memory.dmp

Filesize
8KB

Download
memory/1832-6-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

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