6856f73cf4da248af188a08f275d3829d4cf31c83ce5da8b94cb30a1834ffbef

General

Target

2995c500fad1d1cf8b5be0380f6ea6bd.exe
Size

127KB
MD5

2995c500fad1d1cf8b5be0380f6ea6bd
SHA1

fb6fe606662973380b9a580a990f0fe194edba80
SHA256

6856f73cf4da248af188a08f275d3829d4cf31c83ce5da8b94cb30a1834ffbef
SHA512

e22c412dcf0e2edadb2d4d1de3cdd7b91f0530f96179119d83843a128afd33f4a178f7dfcbe30accb31d829bcebe759c0e4aa3bae567a9e1cb6fbe369612725f
SSDEEP

3072:Pgj+t/SA5EZv+Py9IPEvMnMpDBPRBovupuMmg6oS:PgjG1W1GPbMp1pBcdr

Score

8^/10

persistence upx

Malware Config

Signatures

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\	coolserver.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\coolserver = "C:\\Windows\\coolserver.exe"	coolserver.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	2995c500fad1d1cf8b5be0380f6ea6bd.exe

Executes dropped EXE 1 IoCs

pid	Process
4448	coolserver.exe

UPX packed file 20 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2088-0-0x0000000000400000-0x0000000000455000-memory.dmp	upx
behavioral2/memory/4448-10-0x0000000000400000-0x0000000000455000-memory.dmp	upx
behavioral2/memory/2088-9-0x0000000000400000-0x0000000000455000-memory.dmp	upx
behavioral2/files/0x000200000001fafe-8.dat	upx
behavioral2/files/0x000200000001fafe-7.dat	upx
behavioral2/memory/4448-12-0x0000000000400000-0x0000000000455000-memory.dmp	upx
behavioral2/memory/4448-14-0x0000000000400000-0x0000000000455000-memory.dmp	upx
behavioral2/memory/4448-13-0x0000000000400000-0x0000000000455000-memory.dmp	upx
behavioral2/memory/4448-15-0x0000000000400000-0x0000000000455000-memory.dmp	upx
behavioral2/memory/4448-16-0x0000000000400000-0x0000000000455000-memory.dmp	upx
behavioral2/memory/4448-17-0x0000000000400000-0x0000000000455000-memory.dmp	upx
behavioral2/memory/4448-18-0x0000000000400000-0x0000000000455000-memory.dmp	upx
behavioral2/memory/4448-19-0x0000000000400000-0x0000000000455000-memory.dmp	upx
behavioral2/memory/4448-20-0x0000000000400000-0x0000000000455000-memory.dmp	upx
behavioral2/memory/4448-21-0x0000000000400000-0x0000000000455000-memory.dmp	upx
behavioral2/memory/4448-22-0x0000000000400000-0x0000000000455000-memory.dmp	upx
behavioral2/memory/4448-23-0x0000000000400000-0x0000000000455000-memory.dmp	upx
behavioral2/memory/4448-24-0x0000000000400000-0x0000000000455000-memory.dmp	upx
behavioral2/memory/4448-25-0x0000000000400000-0x0000000000455000-memory.dmp	upx
behavioral2/memory/4448-26-0x0000000000400000-0x0000000000455000-memory.dmp	upx

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\coolserver.exe	2995c500fad1d1cf8b5be0380f6ea6bd.exe
File created	C:\Windows\coolserver.exe	2995c500fad1d1cf8b5be0380f6ea6bd.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2088 wrote to memory of 4448	2088	2995c500fad1d1cf8b5be0380f6ea6bd.exe	23
PID 2088 wrote to memory of 4448	2088	2995c500fad1d1cf8b5be0380f6ea6bd.exe	23
PID 2088 wrote to memory of 4448	2088	2995c500fad1d1cf8b5be0380f6ea6bd.exe	23

C:\Users\Admin\AppData\Local\Temp\2995c500fad1d1cf8b5be0380f6ea6bd.exe
"C:\Users\Admin\AppData\Local\Temp\2995c500fad1d1cf8b5be0380f6ea6bd.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2088
- C:\Windows\coolserver.exe
  "C:\Windows\coolserver.exe"
  2⤵
  - Adds policy Run key to start application
  - Executes dropped EXE
  PID:4448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

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:\Windows\coolserver.exe

Filesize
127KB

MD5
2995c500fad1d1cf8b5be0380f6ea6bd

SHA1
fb6fe606662973380b9a580a990f0fe194edba80

SHA256
6856f73cf4da248af188a08f275d3829d4cf31c83ce5da8b94cb30a1834ffbef

SHA512
e22c412dcf0e2edadb2d4d1de3cdd7b91f0530f96179119d83843a128afd33f4a178f7dfcbe30accb31d829bcebe759c0e4aa3bae567a9e1cb6fbe369612725f

Download Submit
memory/2088-0-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/2088-9-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/4448-16-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/4448-19-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/4448-12-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/4448-14-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/4448-13-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/4448-15-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/4448-10-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/4448-17-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/4448-18-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/4448-11-0x0000000002670000-0x0000000002671000-memory.dmp

Filesize
4KB

Download
memory/4448-20-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/4448-21-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/4448-22-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/4448-23-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/4448-24-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/4448-25-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download
memory/4448-26-0x0000000000400000-0x0000000000455000-memory.dmp

Filesize
340KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads