systembc | 318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd

Resubmissions

18/04/2024, 11:20

240418-nfk6macg3w10

18/04/2024, 11:20

18/04/2024, 11:20

18/04/2024, 11:20

18/04/2024, 11:20

18/04/2024, 09:59

Analysis

max time kernel
596s
max time network
597s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
18/04/2024, 11:20

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General

Target
318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
Size 350KB
Sample240418-nfghfacg2x
SHA256 318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd
MD5 0dc61438b79668900bd081bac6109760
SHA1 2ee66fd972c2d28ad30775971ba95056951910f0
SHA512 467b352ce6188e6126050c229cd47b526e83ef3535449c3f02b70491e159523d7cc8ebb28caab4e8d98627a22a0af1faf13b134072309dfe56ad175d18177ca7
SSDEEP 6144:RoX0oZ+rm/OV6ZH7XYuB4xpuMadbr2X3f+gOkXdhFr:Ry0xrm/h7XYuWCMaV2XWgO8hFr
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

knock0909.monster:4035
knock0909.xyz:4035

Signatures

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

Executes dropped EXE 4 IoCs

pid	Process
720	ctbh.exe
1572	ctbh.exe
4212	ctbh.exe
428	ctbh.exe

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
4	api.ipify.org
5	api.ipify.org

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

Proxy
T1090

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1608 set thread context of 1604	1608	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	73
PID 720 set thread context of 1572	720	ctbh.exe	75
PID 4212 set thread context of 428	4212	ctbh.exe	77

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Tasks\ctbh.job	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
File created	C:\Windows\Tasks\ctbh.job	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1604	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
1604	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1608 wrote to memory of 1604	1608	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	73
PID 1608 wrote to memory of 1604	1608	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	73
PID 1608 wrote to memory of 1604	1608	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	73
PID 1608 wrote to memory of 1604	1608	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	73
PID 1608 wrote to memory of 1604	1608	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	73
PID 1608 wrote to memory of 1604	1608	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	73
PID 1608 wrote to memory of 1604	1608	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	73
PID 1608 wrote to memory of 1604	1608	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	73
PID 1608 wrote to memory of 1604	1608	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	73
PID 720 wrote to memory of 1572	720	ctbh.exe	75
PID 720 wrote to memory of 1572	720	ctbh.exe	75
PID 720 wrote to memory of 1572	720	ctbh.exe	75
PID 720 wrote to memory of 1572	720	ctbh.exe	75
PID 720 wrote to memory of 1572	720	ctbh.exe	75
PID 720 wrote to memory of 1572	720	ctbh.exe	75
PID 720 wrote to memory of 1572	720	ctbh.exe	75
PID 720 wrote to memory of 1572	720	ctbh.exe	75
PID 720 wrote to memory of 1572	720	ctbh.exe	75
PID 4212 wrote to memory of 428	4212	ctbh.exe	77
PID 4212 wrote to memory of 428	4212	ctbh.exe	77
PID 4212 wrote to memory of 428	4212	ctbh.exe	77
PID 4212 wrote to memory of 428	4212	ctbh.exe	77
PID 4212 wrote to memory of 428	4212	ctbh.exe	77
PID 4212 wrote to memory of 428	4212	ctbh.exe	77
PID 4212 wrote to memory of 428	4212	ctbh.exe	77
PID 4212 wrote to memory of 428	4212	ctbh.exe	77
PID 4212 wrote to memory of 428	4212	ctbh.exe	77

C:\Users\Admin\AppData\Local\Temp\318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
"C:\Users\Admin\AppData\Local\Temp\318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1608
- C:\Users\Admin\AppData\Local\Temp\318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
  "C:\Users\Admin\AppData\Local\Temp\318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe"
  2⤵
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  PID:1604

C:\ProgramData\hbxvr\ctbh.exe
C:\ProgramData\hbxvr\ctbh.exe start
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:720
- C:\ProgramData\hbxvr\ctbh.exe
  C:\ProgramData\hbxvr\ctbh.exe start
  2⤵
  - Executes dropped EXE
  PID:1572

C:\ProgramData\hbxvr\ctbh.exe
C:\ProgramData\hbxvr\ctbh.exe start
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4212
- C:\ProgramData\hbxvr\ctbh.exe
  C:\ProgramData\hbxvr\ctbh.exe start
  2⤵
  - Executes dropped EXE
  PID:428

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

ctbh.exe

Path C:\ProgramData\hbxvr\ctbh.exe
Size 350KB
SHA256 318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd
MD5 0dc61438b79668900bd081bac6109760
SHA1 2ee66fd972c2d28ad30775971ba95056951910f0
SHA512 467b352ce6188e6126050c229cd47b526e83ef3535449c3f02b70491e159523d7cc8ebb28caab4e8d98627a22a0af1faf13b134072309dfe56ad175d18177ca7
SSDEEP 6144:RoX0oZ+rm/OV6ZH7XYuB4xpuMadbr2X3f+gOkXdhFr:Ry0xrm/h7XYuWCMaV2XWgO8hFr
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/720-16-0x0000000000E2D000-0x0000000000E34000-memory.dmp

Download

memory/1604-3-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/1604-5-0x0000000000400000-0x000000000040B000-memory.dmp

Download

memory/1604-7-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/1608-1-0x0000000000C70000-0x0000000000D70000-memory.dmp

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memory/1608-2-0x0000000000C40000-0x0000000000C4A000-memory.dmp

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memory/4212-41-0x0000000000C70000-0x0000000000D70000-memory.dmp

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