systembc | b0447405eb71302c0c7f5caf439a9ccada14c7539fad803c45841171dc785a9a

General

Target

b0447405eb71302c0c7f5caf439a9ccada14c7539fad803c45841171dc785a9a.exe
Size

339KB
MD5

0fe587befbb434b018985d6a1fea727c
SHA1

421424778acaf5c01b591fae09f1ea2ea687830c
SHA256

b0447405eb71302c0c7f5caf439a9ccada14c7539fad803c45841171dc785a9a
SHA512

7da23fde6f98826860687fd8c3e4a03d24a8a1da40825ea15cd30fbb6e867311b98e6d965f57073fa430738cc27bdb81eb0072bf70c280deb1e3cded6975b764

Score

10^/10

systembc suricata trojan

Malware Config

Extracted

Family

systembc

C2

asdasd08.com:4039

asdasd08.xyz:4039

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
suricata: ET MALWARE Observed SystemBC CnC Domain in DNS Query
suricata: ET MALWARE Observed SystemBC CnC Domain in DNS Query
suricata
Executes dropped EXE 1 IoCs

Processes:

vhwt.exe

pid process

1948 vhwt.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.

Processes:

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.

Connection Proxy
T1090

pid	process
1948	vhwt.exe

flow	ioc
5	api.ipify.org
6	api.ipify.org
7	ip4.seeip.org
8	ip4.seeip.org

Drops file in Windows directory 2 IoCs

Processes:

b0447405eb71302c0c7f5caf439a9ccada14c7539fad803c45841171dc785a9a.exe

description	ioc	process
File created	C:\Windows\Tasks\vhwt.job	b0447405eb71302c0c7f5caf439a9ccada14c7539fad803c45841171dc785a9a.exe
File opened for modification	C:\Windows\Tasks\vhwt.job	b0447405eb71302c0c7f5caf439a9ccada14c7539fad803c45841171dc785a9a.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

b0447405eb71302c0c7f5caf439a9ccada14c7539fad803c45841171dc785a9a.exe

pid process

920 b0447405eb71302c0c7f5caf439a9ccada14c7539fad803c45841171dc785a9a.exe

pid	process
920	b0447405eb71302c0c7f5caf439a9ccada14c7539fad803c45841171dc785a9a.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1752 wrote to memory of 1948	1752	taskeng.exe	vhwt.exe
PID 1752 wrote to memory of 1948	1752	taskeng.exe	vhwt.exe
PID 1752 wrote to memory of 1948	1752	taskeng.exe	vhwt.exe
PID 1752 wrote to memory of 1948	1752	taskeng.exe	vhwt.exe

C:\Users\Admin\AppData\Local\Temp\b0447405eb71302c0c7f5caf439a9ccada14c7539fad803c45841171dc785a9a.exe
"C:\Users\Admin\AppData\Local\Temp\b0447405eb71302c0c7f5caf439a9ccada14c7539fad803c45841171dc785a9a.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:920

C:\Windows\system32\taskeng.exe
taskeng.exe {2A7005A8-5674-4B3F-87F0-F97954794309} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1752
- C:\ProgramData\gsbj\vhwt.exe
  C:\ProgramData\gsbj\vhwt.exe start
  2⤵
  - Executes dropped EXE
  PID:1948

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Connection Proxy

1

T1090

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Connection Proxy

1

T1090

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\gsbj\vhwt.exe

Filesize
339KB

MD5
0fe587befbb434b018985d6a1fea727c

SHA1
421424778acaf5c01b591fae09f1ea2ea687830c

SHA256
b0447405eb71302c0c7f5caf439a9ccada14c7539fad803c45841171dc785a9a

SHA512
7da23fde6f98826860687fd8c3e4a03d24a8a1da40825ea15cd30fbb6e867311b98e6d965f57073fa430738cc27bdb81eb0072bf70c280deb1e3cded6975b764

Download Submit
C:\ProgramData\gsbj\vhwt.exe

Filesize
339KB

MD5
0fe587befbb434b018985d6a1fea727c

SHA1
421424778acaf5c01b591fae09f1ea2ea687830c

SHA256
b0447405eb71302c0c7f5caf439a9ccada14c7539fad803c45841171dc785a9a

SHA512
7da23fde6f98826860687fd8c3e4a03d24a8a1da40825ea15cd30fbb6e867311b98e6d965f57073fa430738cc27bdb81eb0072bf70c280deb1e3cded6975b764

Download Submit
memory/920-54-0x0000000075BD1000-0x0000000075BD3000-memory.dmp

Filesize
8KB

Download
memory/920-56-0x0000000000240000-0x0000000000249000-memory.dmp

Filesize
36KB

Download
memory/920-55-0x0000000000230000-0x0000000000236000-memory.dmp

Filesize
24KB

Download
memory/920-57-0x0000000000400000-0x0000000003222000-memory.dmp

Filesize
46.1MB

Download
memory/1948-59-0x0000000000000000-mapping.dmp

Download
memory/1948-62-0x0000000000400000-0x0000000003222000-memory.dmp

Filesize
46.1MB

Download

Analysis

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