systembc | 7c05833514baa8de4f997a7fcb04096316f2fb44d77fcc0951bb50adbf8d58f5

Resubmissions

17/04/2024, 09:26

240417-lee7waah5310

17/04/2024, 09:26

17/04/2024, 09:26

17/04/2024, 09:26

17/04/2024, 09:26

16/04/2024, 13:38

Analysis

max time kernel
1792s
max time network
1793s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
17/04/2024, 09:26

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General

Target
7c05833514baa8de4f997a7fcb04096316f2fb44d77fcc0951bb50adbf8d58f5.exe
Size 1.0MB
Sample240417-leddaaah47
SHA256 7c05833514baa8de4f997a7fcb04096316f2fb44d77fcc0951bb50adbf8d58f5
MD5 0a286d2f6060a92d15ddfd03063a1486
SHA1 172ae7b2059b420c463daf8ca58a55d8ab500d5c
SHA512 bdcccaf8f7636bb54d74d1a1ead3288234a787c3b6d9c3d96e3584fc520088c97c98130e8fe030a1ee9551376b270f0ee5c6e53dd44581850e73abc9493d4cc7
SSDEEP 6144:X9mI/A/bpCQqR5yqL5pbqD8T/ruThC711qC711Q:X9ro/4QqLrqDC/ru8PDPQ
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

systembc discovery trojan

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
Contacts a large (923) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Executes dropped EXE 1 IoCs

pid	Process
2164	rebavso.exe

Looks up external IP address via web service 4 IoCs

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

flow	ioc
5	api.ipify.org
6	api.ipify.org
7	ip4.seeip.org
8	ip4.seeip.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 opened for modification	C:\Windows\Tasks\rebavso.job	7c05833514baa8de4f997a7fcb04096316f2fb44d77fcc0951bb50adbf8d58f5.exe
File created	C:\Windows\Tasks\rebavso.job	7c05833514baa8de4f997a7fcb04096316f2fb44d77fcc0951bb50adbf8d58f5.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2276	7c05833514baa8de4f997a7fcb04096316f2fb44d77fcc0951bb50adbf8d58f5.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2736 wrote to memory of 2164	2736	taskeng.exe	29
PID 2736 wrote to memory of 2164	2736	taskeng.exe	29
PID 2736 wrote to memory of 2164	2736	taskeng.exe	29
PID 2736 wrote to memory of 2164	2736	taskeng.exe	29

C:\Users\Admin\AppData\Local\Temp\7c05833514baa8de4f997a7fcb04096316f2fb44d77fcc0951bb50adbf8d58f5.exe
"C:\Users\Admin\AppData\Local\Temp\7c05833514baa8de4f997a7fcb04096316f2fb44d77fcc0951bb50adbf8d58f5.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:2276

C:\Windows\system32\taskeng.exe
taskeng.exe {24B386F2-3E6E-4E8E-A7E6-34DF06CDA0C0} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:2736
- C:\ProgramData\lbnbocp\rebavso.exe
  C:\ProgramData\lbnbocp\rebavso.exe start
  2⤵
  - Executes dropped EXE
  PID:2164

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Command and Control

Proxy

T1090

Exfiltration

Impact

Replay Monitor

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Downloads

rebavso.exe

Path C:\ProgramData\lbnbocp\rebavso.exe
Size 1.0MB
SHA256 7c05833514baa8de4f997a7fcb04096316f2fb44d77fcc0951bb50adbf8d58f5
MD5 0a286d2f6060a92d15ddfd03063a1486
SHA1 172ae7b2059b420c463daf8ca58a55d8ab500d5c
SHA512 bdcccaf8f7636bb54d74d1a1ead3288234a787c3b6d9c3d96e3584fc520088c97c98130e8fe030a1ee9551376b270f0ee5c6e53dd44581850e73abc9493d4cc7
SSDEEP 6144:X9mI/A/bpCQqR5yqL5pbqD8T/ruThC711qC711Q:X9ro/4QqLrqDC/ru8PDPQ
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2164-12-0x00000000047C0000-0x00000000048C0000-memory.dmp

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memory/2164-14-0x0000000000400000-0x00000000045E6000-memory.dmp

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memory/2164-18-0x00000000047C0000-0x00000000048C0000-memory.dmp

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memory/2276-0-0x0000000000400000-0x00000000045E6000-memory.dmp

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memory/2276-2-0x0000000004750000-0x0000000004850000-memory.dmp

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memory/2276-3-0x0000000000020000-0x0000000000029000-memory.dmp

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memory/2276-11-0x0000000000400000-0x00000000045E6000-memory.dmp

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memory/2276-15-0x0000000004750000-0x0000000004850000-memory.dmp

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