43e9bce194b8c816534a645496537fa055a6b31afd733faca7883144b112d214

General

Target
43e9bce194b8c816534a645496537fa055a6b31afd733faca7883144b112d214.xls
Size 91KB
Sample221110-zagf2affcp
SHA256 43e9bce194b8c816534a645496537fa055a6b31afd733faca7883144b112d214
MD5 8219b104f19cde0f66d92b84586bb2c3
SHA1 a705dc24f3763b81fc047f8a0377c7e8012937f9
SHA512 b56ad9c10d92fe86b2e4852c88bccbe85e50c72ed84954343cbf596f6b4b8f1dcae0f232476fe9ed33c83a3e941f55857d0ac7702d6eb8e8d42d9fe70294cb66
SSDEEP 1536:eKpb8rGYrMPe3q7Q0XV5xtezEsi8/dg4bCXuZH4gb4CEn9J4ZDrX:eKpb8rGYrMPe3q7Q0XV5xtezEsi8/dgM
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

persistence

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://www.vinyz.com/cache/rqWV/
xlm40.dropper
http://yuanliao.raluking.com/1eq5o7/gHrTM8YilZz0quKt/

Signatures

Process spawned unexpected child process 1 IoCs

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

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4680	4940	regsvr32.exe	65

Downloads MZ/PE file

Loads dropped DLL 1 IoCs

pid	Process
4680	regsvr32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lhwYDrH.dll = "C:\\Windows\\system32\\regsvr32.exe \"C:\\Windows\\system32\\SCXDwZuwy\\lhwYDrH.dll\""	regsvr32.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4940	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4680	regsvr32.exe
4680	regsvr32.exe
3728	regsvr32.exe
3728	regsvr32.exe
3728	regsvr32.exe
3728	regsvr32.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4940	EXCEL.EXE

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
4940	EXCEL.EXE
4940	EXCEL.EXE
4940	EXCEL.EXE
4940	EXCEL.EXE
4940	EXCEL.EXE
4940	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4940 wrote to memory of 4680	4940	EXCEL.EXE	68
PID 4940 wrote to memory of 4680	4940	EXCEL.EXE	68
PID 4680 wrote to memory of 3728	4680	regsvr32.exe	69
PID 4680 wrote to memory of 3728	4680	regsvr32.exe	69

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\43e9bce194b8c816534a645496537fa055a6b31afd733faca7883144b112d214.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4940
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\elv1.ooocccxxx
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4680
- - C:\Windows\system32\regsvr32.exe
    C:\Windows\system32\regsvr32.exe "C:\Windows\system32\SCXDwZuwy\lhwYDrH.dll"
    3⤵
    - Adds Run key to start application
    - Suspicious behavior: EnumeratesProcesses
    PID:3728

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

elv1.ooocccxxx

Path C:\Users\Admin\elv1.ooocccxxx
Size 595KB
SHA256 5de1250fb37820ca08c3615a82503b16f059b2565a60fdc204c2cac59033d890
MD5 e286881a55a2c14348463ba5af2501a1
SHA1 cde96b8acc99c69ba83a0d6621faf3c2b6c41168
SHA512 ca034d5ce990273cdb14decdc4b26fc8cd42c7342bcdfd79bf622d949f817f1ec9ccdc80c5523c8cd39a932a4148d0d29028d7f778fb1ea2ff1c58f962e46e98
SSDEEP 12288:QST8ek3+6ZIvp0p0tPEgBthNeYU5elGYpED+Hlc:Qjee+6evbtPEihGFYY
MD5 SHA1 SHA512 SSDEEP

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elv1.ooocccxxx

Path \Users\Admin\elv1.ooocccxxx
Size 595KB
SHA256 5de1250fb37820ca08c3615a82503b16f059b2565a60fdc204c2cac59033d890
MD5 e286881a55a2c14348463ba5af2501a1
SHA1 cde96b8acc99c69ba83a0d6621faf3c2b6c41168
SHA512 ca034d5ce990273cdb14decdc4b26fc8cd42c7342bcdfd79bf622d949f817f1ec9ccdc80c5523c8cd39a932a4148d0d29028d7f778fb1ea2ff1c58f962e46e98
SSDEEP 12288:QST8ek3+6ZIvp0p0tPEgBthNeYU5elGYpED+Hlc:Qjee+6evbtPEihGFYY
MD5 SHA1 SHA512 SSDEEP

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memory/4940-120-0x00007FF9D0A10000-0x00007FF9D0A20000-memory.dmp

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memory/4940-121-0x00007FF9D0A10000-0x00007FF9D0A20000-memory.dmp

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memory/4940-122-0x00007FF9D0A10000-0x00007FF9D0A20000-memory.dmp

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memory/4940-123-0x00007FF9D0A10000-0x00007FF9D0A20000-memory.dmp

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memory/4940-132-0x00007FF9CDEC0000-0x00007FF9CDED0000-memory.dmp

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memory/4940-133-0x00007FF9CDEC0000-0x00007FF9CDED0000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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