systembc | c3c48782f893bd61e1102c3095b8c3f7ed842e3e6889ee026d581c5dd1637676

General

Target

c3c48782f893bd61e1102c3095b8c3f7ed842e3e6889ee026d581c5dd1637676.exe
Size

106KB
MD5

85fc0168e19390f9799ab42bfb1e3879
SHA1

25c56170f447f87f7fa8f2cf6a94c2916fc98047
SHA256

c3c48782f893bd61e1102c3095b8c3f7ed842e3e6889ee026d581c5dd1637676
SHA512

852a3dd7cf1734ccd60808a9d60e771bb158a777464dc6cf53392fca098a4be97cf36d04a7955a694b8f4ce19e8232492fb4d56083ac16d7f4cded47dff581c1

Score

10^/10

systembc suricata trojan

Malware Config

Extracted

Family

systembc

C2

sdadvert197.com:4044

mexstat128.com:4044

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:

smrhgng.exe

pid process

912 smrhgng.exe
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

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

Connection Proxy
T1090

pid	process
912	smrhgng.exe

flow	ioc
6	api.ipify.org
8	ip4.seeip.org
9	ip4.seeip.org

Drops file in Windows directory 2 IoCs

Processes:

c3c48782f893bd61e1102c3095b8c3f7ed842e3e6889ee026d581c5dd1637676.exe

description	ioc	process
File created	C:\Windows\Tasks\smrhgng.job	c3c48782f893bd61e1102c3095b8c3f7ed842e3e6889ee026d581c5dd1637676.exe
File opened for modification	C:\Windows\Tasks\smrhgng.job	c3c48782f893bd61e1102c3095b8c3f7ed842e3e6889ee026d581c5dd1637676.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

c3c48782f893bd61e1102c3095b8c3f7ed842e3e6889ee026d581c5dd1637676.exe

pid process

1048 c3c48782f893bd61e1102c3095b8c3f7ed842e3e6889ee026d581c5dd1637676.exe

pid	process
1048	c3c48782f893bd61e1102c3095b8c3f7ed842e3e6889ee026d581c5dd1637676.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1692 wrote to memory of 912	1692	taskeng.exe	smrhgng.exe
PID 1692 wrote to memory of 912	1692	taskeng.exe	smrhgng.exe
PID 1692 wrote to memory of 912	1692	taskeng.exe	smrhgng.exe
PID 1692 wrote to memory of 912	1692	taskeng.exe	smrhgng.exe

C:\Users\Admin\AppData\Local\Temp\c3c48782f893bd61e1102c3095b8c3f7ed842e3e6889ee026d581c5dd1637676.exe
"C:\Users\Admin\AppData\Local\Temp\c3c48782f893bd61e1102c3095b8c3f7ed842e3e6889ee026d581c5dd1637676.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1048

C:\Windows\system32\taskeng.exe
taskeng.exe {4654F992-B594-4B7A-8E20-AA3ECEB21840} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1692

C:\ProgramData\kfkqwms\smrhgng.exe
C:\ProgramData\kfkqwms\smrhgng.exe start
2⤵
- Executes dropped EXE
PID:912

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

Loading Replay Monitor...

Downloads

C:\ProgramData\kfkqwms\smrhgng.exe
Filesize
106KB

MD5
85fc0168e19390f9799ab42bfb1e3879

SHA1
25c56170f447f87f7fa8f2cf6a94c2916fc98047

SHA256
c3c48782f893bd61e1102c3095b8c3f7ed842e3e6889ee026d581c5dd1637676

SHA512
852a3dd7cf1734ccd60808a9d60e771bb158a777464dc6cf53392fca098a4be97cf36d04a7955a694b8f4ce19e8232492fb4d56083ac16d7f4cded47dff581c1

Download Submit
C:\ProgramData\kfkqwms\smrhgng.exe
Filesize
106KB

MD5
85fc0168e19390f9799ab42bfb1e3879

SHA1
25c56170f447f87f7fa8f2cf6a94c2916fc98047

SHA256
c3c48782f893bd61e1102c3095b8c3f7ed842e3e6889ee026d581c5dd1637676

SHA512
852a3dd7cf1734ccd60808a9d60e771bb158a777464dc6cf53392fca098a4be97cf36d04a7955a694b8f4ce19e8232492fb4d56083ac16d7f4cded47dff581c1

Download Submit
memory/912-59-0x0000000000000000-mapping.dmp

Download
memory/912-63-0x0000000000220000-0x0000000000229000-memory.dmp

Filesize
36KB

Download
memory/912-62-0x000000000061B000-0x0000000000621000-memory.dmp

Filesize
24KB

Download
memory/912-64-0x0000000000400000-0x00000000004D5000-memory.dmp

Filesize
852KB

Download
memory/1048-54-0x00000000006CB000-0x00000000006D2000-memory.dmp

Filesize
28KB

Download
memory/1048-55-0x0000000000220000-0x0000000000229000-memory.dmp

Filesize
36KB

Download
memory/1048-56-0x0000000075DF1000-0x0000000075DF3000-memory.dmp

Filesize
8KB

Download
memory/1048-57-0x0000000000400000-0x00000000004D5000-memory.dmp

Filesize
852KB

Download

Analysis

Sharing