38b01a12b8dcd39ebdcf9e97772e848237330eb227e1ccee80125564b27377e5

General

Target

11f44531fb088d31307d87b01e8eabff/research-1646684671.xls
Size

648KB
MD5

b775cd8be83696ca37b2fe00bcb40574
SHA1

60c8a9fdf2b24f8fb4913d4745a8557df5ff8e07
SHA256

1df68d55968bb9d2db4d0d18155188a03a442850ff543c8595166ac6987df820
SHA512

5ad4da8582bec3cc545e322cad2e356f59c4bfa5fe4ca90c0e781dd0e63a7aefbcc27b4045583232e4fdccffbc2bceb832b8d8e9ec3c070cf4b6559ca3c99a72
SSDEEP

6144:Hknl9oBdySAx76F6XeyTVtW/9Ny9ABnl5/PBgxOHjuM9Mn:jl5/WxIji

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

https://nws.visionconsulting.ro/N1G1KCXA/dot.html

xlm40.dropper

https://royalpalm.sparkblue.lk/vCNhYrq3Yg8/dot.html

Signatures

Process spawned unexpected child process 2 IoCs

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

Processes:

regsvr32.exeregsvr32.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3048	3984	regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	5112	3984	regsvr32.exe	EXCEL.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

Processes:

EXCEL.EXE

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

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

3984 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

3984 EXCEL.EXE
3984 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
3984	EXCEL.EXE
3984	EXCEL.EXE
3984	EXCEL.EXE
3984	EXCEL.EXE
3984	EXCEL.EXE
3984	EXCEL.EXE
3984	EXCEL.EXE
3984	EXCEL.EXE
3984	EXCEL.EXE
3984	EXCEL.EXE
3984	EXCEL.EXE
3984	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 3984 wrote to memory of 3048	3984	EXCEL.EXE	regsvr32.exe
PID 3984 wrote to memory of 3048	3984	EXCEL.EXE	regsvr32.exe
PID 3984 wrote to memory of 5112	3984	EXCEL.EXE	regsvr32.exe
PID 3984 wrote to memory of 5112	3984	EXCEL.EXE	regsvr32.exe

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\11f44531fb088d31307d87b01e8eabff\research-1646684671.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:3984

C:\Windows\SYSTEM32\regsvr32.exe
regsvr32 -s ..\iroto.dll
2⤵
- Process spawned unexpected child process
PID:3048

C:\Windows\SYSTEM32\regsvr32.exe
regsvr32 -s ..\iroto1.dll
2⤵
- Process spawned unexpected child process
PID:5112

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\iroto.dll

Filesize
1KB

MD5
af2e644bb48de07e271fef8bfde72921

SHA1
63e0a4b8b6b60d66e8f9b528ef91b6680ebfca3e

SHA256
28ae85ee245026fdeb68bc960f0d667b492d3c7c587cd6bf9f1f0c8b298189a6

SHA512
777966247ed70720cbcb18f0d7cd2c95f397a7e88638a8ca63383a51e914cd40ec9cfe0aee78beb131a95a46175c789c4d2611f1295a08f684fefacc93da4277

Download Submit
memory/3984-10-0x00007FF9B3FD0000-0x00007FF9B41C5000-memory.dmp

Filesize
2.0MB

Download
memory/3984-4-0x00007FF974050000-0x00007FF974060000-memory.dmp

Filesize
64KB

Download
memory/3984-12-0x00007FF9B3FD0000-0x00007FF9B41C5000-memory.dmp

Filesize
2.0MB

Download
memory/3984-6-0x00007FF974050000-0x00007FF974060000-memory.dmp

Filesize
64KB

Download
memory/3984-14-0x00007FF971770000-0x00007FF971780000-memory.dmp

Filesize
64KB

Download
memory/3984-9-0x00007FF9B3FD0000-0x00007FF9B41C5000-memory.dmp

Filesize
2.0MB

Download
memory/3984-11-0x00007FF9B3FD0000-0x00007FF9B41C5000-memory.dmp

Filesize
2.0MB

Download
memory/3984-13-0x00007FF9B3FD0000-0x00007FF9B41C5000-memory.dmp

Filesize
2.0MB

Download
memory/3984-5-0x00007FF9B3FD0000-0x00007FF9B41C5000-memory.dmp

Filesize
2.0MB

Download
memory/3984-2-0x00007FF974050000-0x00007FF974060000-memory.dmp

Filesize
64KB

Download
memory/3984-1-0x00007FF974050000-0x00007FF974060000-memory.dmp

Filesize
64KB

Download
memory/3984-8-0x00007FF9B3FD0000-0x00007FF9B41C5000-memory.dmp

Filesize
2.0MB

Download
memory/3984-7-0x00007FF9B3FD0000-0x00007FF9B41C5000-memory.dmp

Filesize
2.0MB

Download
memory/3984-3-0x00007FF9B406D000-0x00007FF9B406E000-memory.dmp

Filesize
4KB

Download
memory/3984-15-0x00007FF971770000-0x00007FF971780000-memory.dmp

Filesize
64KB

Download
memory/3984-0-0x00007FF974050000-0x00007FF974060000-memory.dmp

Filesize
64KB

Download
memory/3984-41-0x00007FF9B3FD0000-0x00007FF9B41C5000-memory.dmp

Filesize
2.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads