systembc | 804b4844251783c944b1f731776d6588e83e5965cc0cf08bd22de57cb37134d0

Resubmissions

15/04/2024, 11:22

240415-ngjdesdb38 10

10/04/2024, 03:15

10/04/2024, 03:15

10/04/2024, 03:15

10/04/2024, 03:15

20/12/2023, 16:55

Analysis

max time kernel
299s
max time network
300s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
10/04/2024, 03:15

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General

Target

eed65a59ffc55619d3c144643c7bca78.exe
Size

209KB
MD5

eed65a59ffc55619d3c144643c7bca78
SHA1

85f049718c98b19823674e880b45cc66fc030206
SHA256

804b4844251783c944b1f731776d6588e83e5965cc0cf08bd22de57cb37134d0
SHA512

f744d7e69417b13d1faab77b300858fc2e01f18aa400499e7341466d291997f5f54503aa4371838f36b453502619da297f87269c190375dcdbf4084ffc1d34e4
SSDEEP

6144:YDnLgI91y1UkT57iJz/DpURWPSvHuUiYphu1UU:cnLh9yn52rpUR5vHuRYpM+U

Score

10^/10

systembc trojan upx

Malware Config

Extracted

Family

systembc

yan0212.com:4039

yan0212.net:4039

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc

Executes dropped EXE 1 IoCs

pid	Process
4636	mksxl.exe

UPX packed file 1 IoCs

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

upx

resource	yara_rule
behavioral3/files/0x0007000000023220-6.dat	upx

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
22	api.ipify.org
23	api.ipify.org

Uses Tor communications 1 TTPs
Malware can proxy its traffic through Tor for more anonymity.

Proxy
T1090

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\mksxl.job	eed65a59ffc55619d3c144643c7bca78.exe
File opened for modification	C:\Windows\Tasks\mksxl.job	eed65a59ffc55619d3c144643c7bca78.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4776	1748	WerFault.exe	84

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1748	eed65a59ffc55619d3c144643c7bca78.exe
1748	eed65a59ffc55619d3c144643c7bca78.exe

C:\Users\Admin\AppData\Local\Temp\eed65a59ffc55619d3c144643c7bca78.exe
"C:\Users\Admin\AppData\Local\Temp\eed65a59ffc55619d3c144643c7bca78.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1748
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1748 -s 948
  2⤵
  - Program crash
  PID:4776

C:\ProgramData\pejns\mksxl.exe
C:\ProgramData\pejns\mksxl.exe start
1⤵
- Executes dropped EXE
PID:4636

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1748 -ip 1748
1⤵
PID:1804

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Proxy

T1090

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\pejns\mksxl.exe

Filesize
209KB

MD5
eed65a59ffc55619d3c144643c7bca78

SHA1
85f049718c98b19823674e880b45cc66fc030206

SHA256
804b4844251783c944b1f731776d6588e83e5965cc0cf08bd22de57cb37134d0

SHA512
f744d7e69417b13d1faab77b300858fc2e01f18aa400499e7341466d291997f5f54503aa4371838f36b453502619da297f87269c190375dcdbf4084ffc1d34e4

Download Submit
memory/1748-1-0x0000000004930000-0x0000000004A30000-memory.dmp

Filesize
1024KB

Download
memory/1748-2-0x00000000001C0000-0x00000000001C9000-memory.dmp

Filesize
36KB

Download
memory/1748-9-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

Download
memory/1748-14-0x0000000004930000-0x0000000004A30000-memory.dmp

Filesize
1024KB

Download
memory/1748-24-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

Download
memory/4636-10-0x0000000004650000-0x0000000004750000-memory.dmp

Filesize
1024KB

Download
memory/4636-11-0x00000000001C0000-0x00000000001C9000-memory.dmp

Filesize
36KB

Download
memory/4636-13-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

Download
memory/4636-17-0x0000000004650000-0x0000000004750000-memory.dmp

Filesize
1024KB

Download