4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc

General

Target

4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc.exe
Size

187KB
MD5

6c479d84b5e8ddbc5ba22b596749f3d4
SHA1

4fe1258111e39c332ffc26e9e2df055677679e29
SHA256

4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc
SHA512

5e62bddeea578b169973643f88acac31e63c02df3984feaebcdf80bb996262ec1fc63cad9daf298c10edd7b9855144952f4bf4a2698310df44f537f2f2ca3de5
SSDEEP

3072:tUCSZDl/pj1TPg/wanyq8x2CPL6ShRGYGQUcfsIJJpQXH3Wn1NDDrb:GCSZDl/pj1T783W/XJGGf9uiXH

Score

8^/10

evasion persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

skype.exe

pid process

4340 skype.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

2872 netsh.exe

pid	process
2872	netsh.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc.exe

Drops startup file 2 IoCs

Processes:

skype.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\9975759809ee69cc2d0562054d998149.exe	skype.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\9975759809ee69cc2d0562054d998149.exe	skype.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

skype.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\9975759809ee69cc2d0562054d998149 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\skype.exe\" .."	skype.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\9975759809ee69cc2d0562054d998149 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\skype.exe\" .."	skype.exe

Drops desktop.ini file(s) 2 IoCs

Processes:

4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc.exe

description	ioc	process
File created	C:\Windows\assembly\Desktop.ini	4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc.exe

Drops file in Windows directory 3 IoCs

Processes:

4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc.exe

description	ioc	process
File opened for modification	C:\Windows\assembly	4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc.exe
File created	C:\Windows\assembly\Desktop.ini	4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 33 IoCs

Processes:

skype.exe

pid	process
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe
4340	skype.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

skype.exe

description pid process

Token: SeDebugPrivilege 4340 skype.exe

description	pid	process
Token: SeDebugPrivilege	4340	skype.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc.exeskype.exe

description	pid	process	target process
PID 2764 wrote to memory of 4340	2764	4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc.exe	skype.exe
PID 2764 wrote to memory of 4340	2764	4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc.exe	skype.exe
PID 4340 wrote to memory of 2872	4340	skype.exe	netsh.exe
PID 4340 wrote to memory of 2872	4340	skype.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc.exe
"C:\Users\Admin\AppData\Local\Temp\4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc.exe"
1⤵
- Checks computer location settings
- Drops desktop.ini file(s)
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2764

C:\Users\Admin\AppData\Local\Temp\skype.exe
"C:\Users\Admin\AppData\Local\Temp\skype.exe"
2⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4340

C:\Windows\SYSTEM32\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\skype.exe" "skype.exe" ENABLE
3⤵
- Modifies Windows Firewall
PID:2872

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\skype.exe

Filesize
187KB

MD5
6c479d84b5e8ddbc5ba22b596749f3d4

SHA1
4fe1258111e39c332ffc26e9e2df055677679e29

SHA256
4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc

SHA512
5e62bddeea578b169973643f88acac31e63c02df3984feaebcdf80bb996262ec1fc63cad9daf298c10edd7b9855144952f4bf4a2698310df44f537f2f2ca3de5

Download Submit
C:\Users\Admin\AppData\Local\Temp\skype.exe

Filesize
187KB

MD5
6c479d84b5e8ddbc5ba22b596749f3d4

SHA1
4fe1258111e39c332ffc26e9e2df055677679e29

SHA256
4d63f3ef08e23999e56a50e1fcbbaff5054c63dcdd1e492f986ada74ba7ee9bc

SHA512
5e62bddeea578b169973643f88acac31e63c02df3984feaebcdf80bb996262ec1fc63cad9daf298c10edd7b9855144952f4bf4a2698310df44f537f2f2ca3de5

Download Submit
memory/2764-132-0x00007FFB53270000-0x00007FFB53CA6000-memory.dmp

Filesize
10.2MB

Download
memory/2872-137-0x0000000000000000-mapping.dmp

Download
memory/4340-133-0x0000000000000000-mapping.dmp

Download
memory/4340-136-0x00007FFB53270000-0x00007FFB53CA6000-memory.dmp

Filesize
10.2MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads