aba105fe8ad27d96d744c4f5d2387feef994420bc55db7df3307c33cff080e30

General

Target

48005.xls
Size

80KB
MD5

e0fcfaac8d385a1bcab28b834b9af2a0
SHA1

fcbbbb624a8903e4d4e69081fc1f1ccbd0958405
SHA256

aba105fe8ad27d96d744c4f5d2387feef994420bc55db7df3307c33cff080e30
SHA512

a6514afec518f1795b24a1b98e1d75ded765a46a5671c3ec3d528849ee6cf57c0fa98c4264a67cc9c029be6a445d7fc6c879d07619b70a7f9d8a0626a4f84d90

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 2 IoCs

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

Processes:

certutil.exerundll32.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	3932	3992	certutil.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1784	3992	rundll32.exe	EXCEL.EXE

Blocklisted process makes network request 4 IoCs

Processes:

rundll32.exe

flow pid process

28 1672 rundll32.exe
30 1672 rundll32.exe
31 1672 rundll32.exe
33 1672 rundll32.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

1672 rundll32.exe

flow	pid	process
28	1672	rundll32.exe
30	1672	rundll32.exe
31	1672	rundll32.exe
33	1672	rundll32.exe

pid	process
1672	rundll32.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

3992 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
3992	EXCEL.EXE
3992	EXCEL.EXE
3992	EXCEL.EXE
3992	EXCEL.EXE
3992	EXCEL.EXE
3992	EXCEL.EXE
3992	EXCEL.EXE
3992	EXCEL.EXE
3992	EXCEL.EXE
3992	EXCEL.EXE
3992	EXCEL.EXE
3992	EXCEL.EXE
3992	EXCEL.EXE
3992	EXCEL.EXE

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

EXCEL.EXErundll32.exe

description	pid	process	target process
PID 3992 wrote to memory of 3932	3992	EXCEL.EXE	certutil.exe
PID 3992 wrote to memory of 3932	3992	EXCEL.EXE	certutil.exe
PID 3992 wrote to memory of 1784	3992	EXCEL.EXE	rundll32.exe
PID 3992 wrote to memory of 1784	3992	EXCEL.EXE	rundll32.exe
PID 1784 wrote to memory of 1672	1784	rundll32.exe	rundll32.exe
PID 1784 wrote to memory of 1672	1784	rundll32.exe	rundll32.exe
PID 1784 wrote to memory of 1672	1784	rundll32.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\48005.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3992

C:\Windows\System32\certutil.exe
"C:\Windows\System32\certutil.exe" -decodehex C:\Users\Public\4875.txt C:\Users\Public\4875.dll
2⤵
- Process spawned unexpected child process
PID:3932

C:\Windows\System32\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\Users\Public\4875.dll,D
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:1784

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\Users\Public\4875.dll,D
3⤵
- Blocklisted process makes network request
- Loads dropped DLL
PID:1672

Network

MITRE ATT&CK Enterprise v6

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

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Downloads

C:\Users\Public\4875.dll

MD5
09aa345445d3b9770f913be946a56738

SHA1
2c745814ef7f3e1cefe6e468532422c5d0071aeb

SHA256
37998fece4feb0a46bed59ef538fbfc61c457fa0187e42643e4a42aec94dbf77

SHA512
054ed6d18943f6b581d39aef83b57179b1091344bf60ca7cdd060b10e62b693087076d77433353503685be96d94a19dde84c20c4db0d9c025280d90c716bb2f9

Download Submit
C:\Users\Public\4875.txt

MD5
652620d75f7d14f0b5fb7adaef835c11

SHA1
be88d1a4be7db5170f26cb3068783cb78ad92cf4

SHA256
c8f9a6c0d639d9dbe1c432ca1415fa1129f7c1cda3e8febb4dc961763039a774

SHA512
7ee326b9621285e412811cd01e829e789a89d8916cd39bb45eed92b82615e8595e704c30cfc674778f929249b387a510e0996c105e81eec56670871ca9da7f79

Download Submit
\Users\Public\4875.dll

MD5
09aa345445d3b9770f913be946a56738

SHA1
2c745814ef7f3e1cefe6e468532422c5d0071aeb

SHA256
37998fece4feb0a46bed59ef538fbfc61c457fa0187e42643e4a42aec94dbf77

SHA512
054ed6d18943f6b581d39aef83b57179b1091344bf60ca7cdd060b10e62b693087076d77433353503685be96d94a19dde84c20c4db0d9c025280d90c716bb2f9

Download Submit
memory/1672-7-0x0000000000000000-mapping.dmp

Download
memory/1784-5-0x0000000000000000-mapping.dmp

Download
memory/3932-3-0x0000000000000000-mapping.dmp

Download
memory/3992-2-0x00007FFC33A00000-0x00007FFC34037000-memory.dmp

Filesize
6.2MB

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads