systembc | da1d1f735f97bf6ec7b008e135196afd97fd0f8884ddb7526df6be626453c3c8

General

Target

da1d1f735f97bf6ec7b008e135196afd97fd0f8884ddb7526df6be626453c3c8.exe
Size

87KB
MD5

6852984ac451a05e24c746a7beae2f7e
SHA1

647d364e9c10453271d21d4de892ccdbc1ec938e
SHA256

da1d1f735f97bf6ec7b008e135196afd97fd0f8884ddb7526df6be626453c3c8
SHA512

c03b55e314da300fd769cac02465b22c0317dfd4c445e6c9c36dd2c68cea7045ceefd872b295772fc6aa3cab6e604a4f170067d3e4ff2295ccd6109b1e735220

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:

eeposr.exe

pid process

852 eeposr.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

4 api.ipify.org
5 api.ipify.org
6 ip4.seeip.org
7 ip4.seeip.org
Uses Tor communications 1 TTPs
Malware can proxy its traffic through Tor for more anonymity.

Connection Proxy
T1090

pid	process
852	eeposr.exe

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

Drops file in Windows directory 2 IoCs

Processes:

da1d1f735f97bf6ec7b008e135196afd97fd0f8884ddb7526df6be626453c3c8.exe

description	ioc	process
File created	C:\Windows\Tasks\eeposr.job	da1d1f735f97bf6ec7b008e135196afd97fd0f8884ddb7526df6be626453c3c8.exe
File opened for modification	C:\Windows\Tasks\eeposr.job	da1d1f735f97bf6ec7b008e135196afd97fd0f8884ddb7526df6be626453c3c8.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

da1d1f735f97bf6ec7b008e135196afd97fd0f8884ddb7526df6be626453c3c8.exe

pid process

1948 da1d1f735f97bf6ec7b008e135196afd97fd0f8884ddb7526df6be626453c3c8.exe

pid	process
1948	da1d1f735f97bf6ec7b008e135196afd97fd0f8884ddb7526df6be626453c3c8.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1488 wrote to memory of 852	1488	taskeng.exe	eeposr.exe
PID 1488 wrote to memory of 852	1488	taskeng.exe	eeposr.exe
PID 1488 wrote to memory of 852	1488	taskeng.exe	eeposr.exe
PID 1488 wrote to memory of 852	1488	taskeng.exe	eeposr.exe

C:\Users\Admin\AppData\Local\Temp\da1d1f735f97bf6ec7b008e135196afd97fd0f8884ddb7526df6be626453c3c8.exe
"C:\Users\Admin\AppData\Local\Temp\da1d1f735f97bf6ec7b008e135196afd97fd0f8884ddb7526df6be626453c3c8.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1948

C:\Windows\system32\taskeng.exe
taskeng.exe {C294F48A-372D-4401-BEF0-1B656F7C7BB5} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1488

C:\ProgramData\rhjnko\eeposr.exe
C:\ProgramData\rhjnko\eeposr.exe start
2⤵
- Executes dropped EXE
PID:852

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Connection Proxy

1

T1090

Impact

Replay Monitor

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Downloads

C:\ProgramData\rhjnko\eeposr.exe
Filesize
87KB

MD5
6852984ac451a05e24c746a7beae2f7e

SHA1
647d364e9c10453271d21d4de892ccdbc1ec938e

SHA256
da1d1f735f97bf6ec7b008e135196afd97fd0f8884ddb7526df6be626453c3c8

SHA512
c03b55e314da300fd769cac02465b22c0317dfd4c445e6c9c36dd2c68cea7045ceefd872b295772fc6aa3cab6e604a4f170067d3e4ff2295ccd6109b1e735220

Download Submit
C:\ProgramData\rhjnko\eeposr.exe
Filesize
87KB

MD5
6852984ac451a05e24c746a7beae2f7e

SHA1
647d364e9c10453271d21d4de892ccdbc1ec938e

SHA256
da1d1f735f97bf6ec7b008e135196afd97fd0f8884ddb7526df6be626453c3c8

SHA512
c03b55e314da300fd769cac02465b22c0317dfd4c445e6c9c36dd2c68cea7045ceefd872b295772fc6aa3cab6e604a4f170067d3e4ff2295ccd6109b1e735220

Download Submit
memory/852-59-0x0000000000000000-mapping.dmp

Download
memory/852-62-0x00000000030DB000-0x00000000030E2000-memory.dmp

Filesize
28KB

Download
memory/852-63-0x0000000000400000-0x0000000002FA1000-memory.dmp

Filesize
43.6MB

Download
memory/1948-54-0x0000000076571000-0x0000000076573000-memory.dmp

Filesize
8KB

Download
memory/1948-56-0x0000000000230000-0x0000000000239000-memory.dmp

Filesize
36KB

Download
memory/1948-55-0x000000000317B000-0x0000000003182000-memory.dmp

Filesize
28KB

Download
memory/1948-57-0x0000000000400000-0x0000000002FA1000-memory.dmp

Filesize
43.6MB

Download

Analysis

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