635d1c5473e2c81822bae98448796020eb58d8c96e88ada7d1f057c76caa0bbe

Analysis

max time kernel
157s
max time network
192s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
24-11-2022 10:18

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General

Target

fax20141311.scr
Size

152KB
MD5

5a9cf95f1bcbfab27697320d37a285fa
SHA1

bf3a1663e883a6cd5c6841b33560d82cf981760a
SHA256

d3a0814c13c1b5e4284dde67f3587f2dcd29f79dc321684ad8453fc7cd0c88d7
SHA512

156a7701aca6ebd2537927621916009f968a9a7602738b246e40a2fffd8132846de464c811fd8e29185a6e18deb22d8af4aa2231ca38cf07e94717bcc263bece
SSDEEP

3072:T0myVXzL23pim8Y4U0Ag0FugZmTWAkzQk1T8qrgp:wmWXzS3pim8Yr0AOAaXkD

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

winlogin.exe

pid process

4712 winlogin.exe

pid	process
4712	winlogin.exe

Modifies Installed Components in the registry 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

winlogin.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Active Setup\Installed Components\05F16C88-71D3-42C1-BB4F-E9BAF7DB4A9E	winlogin.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Active Setup\Installed Components\05F16C88-71D3-42C1-BB4F-E9BAF7DB4A9E\cfg = "{E3604DD9-0BE9-4A9E-8551-44F97D1294D6}SERV }SOCAAGDT "	winlogin.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

winlogin.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	winlogin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\winlogin = "C:\\Users\\Admin\\AppData\\Roaming\\Windows\\winlogin.exe"	winlogin.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

54 api.ipify.org
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

3696 PING.EXE

flow	ioc
54	api.ipify.org

pid	process
3696	PING.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

fax20141311.scrcmd.exe

description	pid	process	target process
PID 4772 wrote to memory of 2032	4772	fax20141311.scr	cmd.exe
PID 4772 wrote to memory of 2032	4772	fax20141311.scr	cmd.exe
PID 4772 wrote to memory of 2032	4772	fax20141311.scr	cmd.exe
PID 4772 wrote to memory of 4900	4772	fax20141311.scr	cmd.exe
PID 4772 wrote to memory of 4900	4772	fax20141311.scr	cmd.exe
PID 4772 wrote to memory of 4900	4772	fax20141311.scr	cmd.exe
PID 4900 wrote to memory of 3696	4900	cmd.exe	PING.EXE
PID 4900 wrote to memory of 3696	4900	cmd.exe	PING.EXE
PID 4900 wrote to memory of 3696	4900	cmd.exe	PING.EXE
PID 4900 wrote to memory of 4712	4900	cmd.exe	winlogin.exe
PID 4900 wrote to memory of 4712	4900	cmd.exe	winlogin.exe
PID 4900 wrote to memory of 4712	4900	cmd.exe	winlogin.exe

C:\Users\Admin\AppData\Local\Temp\fax20141311.scr
"C:\Users\Admin\AppData\Local\Temp\fax20141311.scr" /S
1⤵
- Suspicious use of WriteProcessMemory
PID:4772

C:\Windows\SysWOW64\cmd.exe
cmd /D /R type "C:\Users\Admin\AppData\Roaming\Windows\winlogin.exe" > ___ && move /Y ___ "C:\Users\Admin\AppData\Roaming\Windows\winlogin.exe"
2⤵
PID:2032

C:\Windows\SysWOW64\cmd.exe
cmd /D /R ping -n 10 localhost && del "C:\Users\Admin\AppData\Local\Temp\fax20141311.scr" && start /B "" "C:\Users\Admin\AppData\Roaming\Windows\winlogin.exe" && exit
2⤵
- Suspicious use of WriteProcessMemory
PID:4900

C:\Windows\SysWOW64\PING.EXE
ping -n 10 localhost
3⤵
- Runs ping.exe
PID:3696

C:\Users\Admin\AppData\Roaming\Windows\winlogin.exe
"C:\Users\Admin\AppData\Roaming\Windows\winlogin.exe"
3⤵
- Executes dropped EXE
- Modifies Installed Components in the registry
- Adds Run key to start application
PID:4712

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Windows\winlogin.exe

Filesize
152KB

MD5
5a9cf95f1bcbfab27697320d37a285fa

SHA1
bf3a1663e883a6cd5c6841b33560d82cf981760a

SHA256
d3a0814c13c1b5e4284dde67f3587f2dcd29f79dc321684ad8453fc7cd0c88d7

SHA512
156a7701aca6ebd2537927621916009f968a9a7602738b246e40a2fffd8132846de464c811fd8e29185a6e18deb22d8af4aa2231ca38cf07e94717bcc263bece

Download Submit
C:\Users\Admin\AppData\Roaming\Windows\winlogin.exe

Filesize
152KB

MD5
5a9cf95f1bcbfab27697320d37a285fa

SHA1
bf3a1663e883a6cd5c6841b33560d82cf981760a

SHA256
d3a0814c13c1b5e4284dde67f3587f2dcd29f79dc321684ad8453fc7cd0c88d7

SHA512
156a7701aca6ebd2537927621916009f968a9a7602738b246e40a2fffd8132846de464c811fd8e29185a6e18deb22d8af4aa2231ca38cf07e94717bcc263bece

Download Submit
C:\Users\Admin\AppData\Roaming\Windows\winlogin.exe

Filesize
152KB

MD5
5a9cf95f1bcbfab27697320d37a285fa

SHA1
bf3a1663e883a6cd5c6841b33560d82cf981760a

SHA256
d3a0814c13c1b5e4284dde67f3587f2dcd29f79dc321684ad8453fc7cd0c88d7

SHA512
156a7701aca6ebd2537927621916009f968a9a7602738b246e40a2fffd8132846de464c811fd8e29185a6e18deb22d8af4aa2231ca38cf07e94717bcc263bece

Download Submit
memory/2032-133-0x0000000000000000-mapping.dmp

Download
memory/3696-136-0x0000000000000000-mapping.dmp

Download
memory/4712-137-0x0000000000000000-mapping.dmp

Download
memory/4712-140-0x0000000002480000-0x000000000259E000-memory.dmp

Filesize
1.1MB

Download
memory/4772-132-0x0000000002620000-0x000000000273E000-memory.dmp

Filesize
1.1MB

Download
memory/4900-135-0x0000000000000000-mapping.dmp

Download