ebf3394f6ce4969ede9d837e55859ad751e02b46f795eae697fabec92d3252a1

General

Target

Comprobant.xls
Size

64KB
MD5

ff489ab462ca00e089503283dd83888e
SHA1

5608b77b509bbfa4ae88c3a426591a0913fd1e2c
SHA256

ebf3394f6ce4969ede9d837e55859ad751e02b46f795eae697fabec92d3252a1
SHA512

76a93057a63def3206848687ce269bbbba2d7fb9e3031a8b67da7dcbe133792101638acc9057afc2a5c8b86646444119f0b59c5b90b89b0919530b5f5256e434
SSDEEP

1536:RrxEtjPOtioVjDGUU1qfDlaGGx+cL2QnAUPdbQ44Oh0C:RrxEtjPOtioVjDGUU1qfDlaGGx+cL2Qd

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

LXEBKCNFK.exeLXEBKCNFK.exe

pid process

2192 LXEBKCNFK.exe
1944 LXEBKCNFK.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

LXEBKCNFK.exe

description pid process target process

PID 2192 set thread context of 1944 2192 LXEBKCNFK.exe LXEBKCNFK.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3428 1944 WerFault.exe LXEBKCNFK.exe

pid	process
2192	LXEBKCNFK.exe
1944	LXEBKCNFK.exe

description	pid	process	target process
PID 2192 set thread context of 1944	2192	LXEBKCNFK.exe	LXEBKCNFK.exe

pid	pid_target	process	target process
3428	1944	WerFault.exe	LXEBKCNFK.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\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	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

3448 EXCEL.EXE
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

LXEBKCNFK.exe

description pid process

Token: SeDebugPrivilege 2192 LXEBKCNFK.exe

description	pid	process
Token: SeDebugPrivilege	2192	LXEBKCNFK.exe

Suspicious use of SetWindowsHookEx 16 IoCs

Processes:

EXCEL.EXE

pid	process
3448	EXCEL.EXE
3448	EXCEL.EXE
3448	EXCEL.EXE
3448	EXCEL.EXE
3448	EXCEL.EXE
3448	EXCEL.EXE
3448	EXCEL.EXE
3448	EXCEL.EXE
3448	EXCEL.EXE
3448	EXCEL.EXE
3448	EXCEL.EXE
3448	EXCEL.EXE
3448	EXCEL.EXE
3448	EXCEL.EXE
3448	EXCEL.EXE
3448	EXCEL.EXE

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

EXCEL.EXELXEBKCNFK.exe

description	pid	process	target process
PID 3448 wrote to memory of 2192	3448	EXCEL.EXE	LXEBKCNFK.exe
PID 3448 wrote to memory of 2192	3448	EXCEL.EXE	LXEBKCNFK.exe
PID 3448 wrote to memory of 2192	3448	EXCEL.EXE	LXEBKCNFK.exe
PID 2192 wrote to memory of 1944	2192	LXEBKCNFK.exe	LXEBKCNFK.exe
PID 2192 wrote to memory of 1944	2192	LXEBKCNFK.exe	LXEBKCNFK.exe
PID 2192 wrote to memory of 1944	2192	LXEBKCNFK.exe	LXEBKCNFK.exe
PID 2192 wrote to memory of 1944	2192	LXEBKCNFK.exe	LXEBKCNFK.exe
PID 2192 wrote to memory of 1944	2192	LXEBKCNFK.exe	LXEBKCNFK.exe
PID 2192 wrote to memory of 1944	2192	LXEBKCNFK.exe	LXEBKCNFK.exe
PID 2192 wrote to memory of 1944	2192	LXEBKCNFK.exe	LXEBKCNFK.exe
PID 2192 wrote to memory of 1944	2192	LXEBKCNFK.exe	LXEBKCNFK.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\Comprobant.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3448

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\LXEBKCNFK.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\LXEBKCNFK.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2192

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\LXEBKCNFK.exe
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\LXEBKCNFK.exe
3⤵
- Executes dropped EXE
PID:1944

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1944 -s 80
4⤵
- Program crash
PID:3428

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 1944 -ip 1944
1⤵
PID:600

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:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\LXEBKCNFK.exe
Filesize
878KB

MD5
9d6bb03b177aba8b924d845fb31f0e33

SHA1
d4155e8901742b509828bac96b8126365e3a9b97

SHA256
78dba4330a89c61f3d91ed3601818ec3f4f2830b4a608526bf746103f0f1dcb3

SHA512
89653795be23cbd35803173afdc66a35f54c72900fd870edeab7e9bd0cda56cef1604edfee4e4c799f46ed4b94b897d101f6c4fcc34a1d46eff410393bf64fac

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\LXEBKCNFK.exe
Filesize
878KB

MD5
9d6bb03b177aba8b924d845fb31f0e33

SHA1
d4155e8901742b509828bac96b8126365e3a9b97

SHA256
78dba4330a89c61f3d91ed3601818ec3f4f2830b4a608526bf746103f0f1dcb3

SHA512
89653795be23cbd35803173afdc66a35f54c72900fd870edeab7e9bd0cda56cef1604edfee4e4c799f46ed4b94b897d101f6c4fcc34a1d46eff410393bf64fac

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\LXEBKCNFK.exe
Filesize
878KB

MD5
9d6bb03b177aba8b924d845fb31f0e33

SHA1
d4155e8901742b509828bac96b8126365e3a9b97

SHA256
78dba4330a89c61f3d91ed3601818ec3f4f2830b4a608526bf746103f0f1dcb3

SHA512
89653795be23cbd35803173afdc66a35f54c72900fd870edeab7e9bd0cda56cef1604edfee4e4c799f46ed4b94b897d101f6c4fcc34a1d46eff410393bf64fac

Download Submit
memory/1944-146-0x0000000000000000-mapping.dmp

Download
memory/2192-142-0x0000000000360000-0x0000000000440000-memory.dmp

Filesize
896KB

Download
memory/2192-143-0x000000000A670000-0x000000000A70C000-memory.dmp

Filesize
624KB

Download
memory/2192-145-0x000000000A7B0000-0x000000000A842000-memory.dmp

Filesize
584KB

Download
memory/2192-139-0x0000000000000000-mapping.dmp

Download
memory/2192-144-0x000000000ACC0000-0x000000000B264000-memory.dmp

Filesize
5.6MB

Download
memory/3448-136-0x00007FFCDDAD0000-0x00007FFCDDAE0000-memory.dmp

Filesize
64KB

Download
memory/3448-132-0x00007FFCDDAD0000-0x00007FFCDDAE0000-memory.dmp

Filesize
64KB

Download
memory/3448-135-0x00007FFCDDAD0000-0x00007FFCDDAE0000-memory.dmp

Filesize
64KB

Download
memory/3448-137-0x00007FFCDB720000-0x00007FFCDB730000-memory.dmp

Filesize
64KB

Download
memory/3448-138-0x00007FFCDB720000-0x00007FFCDB730000-memory.dmp

Filesize
64KB

Download
memory/3448-134-0x00007FFCDDAD0000-0x00007FFCDDAE0000-memory.dmp

Filesize
64KB

Download
memory/3448-133-0x00007FFCDDAD0000-0x00007FFCDDAE0000-memory.dmp

Filesize
64KB

Download
memory/3448-150-0x00007FFCDDAD0000-0x00007FFCDDAE0000-memory.dmp

Filesize
64KB

Download
memory/3448-151-0x00007FFCDDAD0000-0x00007FFCDDAE0000-memory.dmp

Filesize
64KB

Download
memory/3448-152-0x00007FFCDDAD0000-0x00007FFCDDAE0000-memory.dmp

Filesize
64KB

Download
memory/3448-153-0x00007FFCDDAD0000-0x00007FFCDDAE0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads