Malware Analysis Report

2025-04-03 09:39

Sample ID 230507-fxnn3sch51
Target a20d99e025fb23ba51d38a975bc10de5.exe
SHA256 6278b1a4d8a19c7ac40ee309c100924427fb35028f3eadb96112c9b70c3a0d59
Tags
systembc trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

6278b1a4d8a19c7ac40ee309c100924427fb35028f3eadb96112c9b70c3a0d59

Threat Level: Known bad

The file a20d99e025fb23ba51d38a975bc10de5.exe was found to be: Known bad.

Malicious Activity Summary

systembc trojan

SystemBC

Executes dropped EXE

Drops file in Windows directory

Program crash

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-05-07 05:15

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-05-07 05:15

Reported

2023-05-07 14:16

Platform

win7-20230220-en

Max time kernel

181s

Max time network

180s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe"

Signatures

SystemBC

trojan systembc

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\urhkg\ksdioge.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Tasks\ksdioge.job C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe N/A
File opened for modification C:\Windows\Tasks\ksdioge.job C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1924 wrote to memory of 1724 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\urhkg\ksdioge.exe
PID 1924 wrote to memory of 1724 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\urhkg\ksdioge.exe
PID 1924 wrote to memory of 1724 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\urhkg\ksdioge.exe
PID 1924 wrote to memory of 1724 N/A C:\Windows\system32\taskeng.exe C:\ProgramData\urhkg\ksdioge.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe

"C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {5CA8DAEE-2FBF-4BF6-BEEE-61E55CA09673} S-1-5-18:NT AUTHORITY\System:Service:

C:\ProgramData\urhkg\ksdioge.exe

C:\ProgramData\urhkg\ksdioge.exe start

Network

Country Destination Domain Proto
PA 141.98.82.229:4001 tcp
PA 141.98.82.229:4001 tcp

Files

memory/1176-55-0x0000000000220000-0x0000000000229000-memory.dmp

memory/1176-56-0x0000000000400000-0x0000000000581000-memory.dmp

C:\ProgramData\urhkg\ksdioge.exe

MD5 a20d99e025fb23ba51d38a975bc10de5
SHA1 6d58a7dc6f4e84ed6cf70fb154e6af3193ff4045
SHA256 6278b1a4d8a19c7ac40ee309c100924427fb35028f3eadb96112c9b70c3a0d59
SHA512 a99ea0bc3d947e5048d92f8e5bdf1745c5d428f2934e29cb2d4f7d3bea029a467e01f28fdc5f09390141b80ad80e016b5b9171fb3b4bf2bd0e0a84a6d9328198

C:\ProgramData\urhkg\ksdioge.exe

MD5 a20d99e025fb23ba51d38a975bc10de5
SHA1 6d58a7dc6f4e84ed6cf70fb154e6af3193ff4045
SHA256 6278b1a4d8a19c7ac40ee309c100924427fb35028f3eadb96112c9b70c3a0d59
SHA512 a99ea0bc3d947e5048d92f8e5bdf1745c5d428f2934e29cb2d4f7d3bea029a467e01f28fdc5f09390141b80ad80e016b5b9171fb3b4bf2bd0e0a84a6d9328198

memory/1724-71-0x0000000000400000-0x0000000000581000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-05-07 05:15

Reported

2023-05-07 14:16

Platform

win10v2004-20230220-en

Max time kernel

205s

Max time network

209s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe"

Signatures

SystemBC

trojan systembc

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Tasks\omnaa.job C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe N/A
File created C:\Windows\Tasks\omnaa.job C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe

"C:\Users\Admin\AppData\Local\Temp\a20d99e025fb23ba51d38a975bc10de5.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2104 -ip 2104

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2104 -s 488

Network

Country Destination Domain Proto
US 93.184.221.240:80 tcp
IE 13.69.239.74:443 tcp
US 8.8.8.8:53 1.77.109.52.in-addr.arpa udp
US 52.242.101.226:443 tcp
US 8.8.8.8:53 126.139.241.8.in-addr.arpa udp
US 8.8.8.8:53 123.108.74.40.in-addr.arpa udp
US 93.184.221.240:80 tcp
US 52.242.101.226:443 tcp
NL 173.223.113.164:443 tcp
US 131.253.33.203:80 tcp
US 52.242.101.226:443 tcp
US 8.8.8.8:53 76.38.195.152.in-addr.arpa udp
US 52.242.101.226:443 tcp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 52.242.101.226:443 tcp
US 52.242.101.226:443 tcp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 52.242.101.226:443 tcp
US 52.242.101.226:443 tcp

Files

memory/2104-134-0x00000000022C0000-0x00000000022C9000-memory.dmp

memory/2104-135-0x0000000000400000-0x0000000000581000-memory.dmp