systembc | e3edf5e1c47e823f99c16bf388395a3a51708f492fdd057b58b19660dc96417e

General

Target

e3edf5e1c47e823f99c16bf388395a3a51708f492fdd057b58b19660dc96417e.exe
Size

281KB
MD5

4492cce08449651654708c03f621ba63
SHA1

8896c08bec98a3b7f5c1b6fa8fd005586a035617
SHA256

e3edf5e1c47e823f99c16bf388395a3a51708f492fdd057b58b19660dc96417e
SHA512

e0f9c97b2959bb17de8c351fc315ed9691d5f6154907541baedb29448c70e1f57d64cdf59d6cf7408ed8f229ac123da67f2075c53188ffcf1a562735ac417899

Score

10^/10

systembc 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
Executes dropped EXE 1 IoCs

Processes:

obslooi.exe

pid process

1544 obslooi.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

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

Connection Proxy
T1090

pid	process
1544	obslooi.exe

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

Drops file in Windows directory 2 IoCs

Processes:

e3edf5e1c47e823f99c16bf388395a3a51708f492fdd057b58b19660dc96417e.exe

description	ioc	process
File opened for modification	C:\Windows\Tasks\obslooi.job	e3edf5e1c47e823f99c16bf388395a3a51708f492fdd057b58b19660dc96417e.exe
File created	C:\Windows\Tasks\obslooi.job	e3edf5e1c47e823f99c16bf388395a3a51708f492fdd057b58b19660dc96417e.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

e3edf5e1c47e823f99c16bf388395a3a51708f492fdd057b58b19660dc96417e.exe

pid process

1240 e3edf5e1c47e823f99c16bf388395a3a51708f492fdd057b58b19660dc96417e.exe

pid	process
1240	e3edf5e1c47e823f99c16bf388395a3a51708f492fdd057b58b19660dc96417e.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1620 wrote to memory of 1544	1620	taskeng.exe	obslooi.exe
PID 1620 wrote to memory of 1544	1620	taskeng.exe	obslooi.exe
PID 1620 wrote to memory of 1544	1620	taskeng.exe	obslooi.exe
PID 1620 wrote to memory of 1544	1620	taskeng.exe	obslooi.exe

C:\Users\Admin\AppData\Local\Temp\e3edf5e1c47e823f99c16bf388395a3a51708f492fdd057b58b19660dc96417e.exe
"C:\Users\Admin\AppData\Local\Temp\e3edf5e1c47e823f99c16bf388395a3a51708f492fdd057b58b19660dc96417e.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1240

C:\Windows\system32\taskeng.exe
taskeng.exe {AFEAC796-239E-45C3-8431-8D7B41F906BD} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1620

C:\ProgramData\lpvbvb\obslooi.exe
C:\ProgramData\lpvbvb\obslooi.exe start
2⤵
- Executes dropped EXE
PID:1544

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\lpvbvb\obslooi.exe
Filesize
281KB

MD5
4492cce08449651654708c03f621ba63

SHA1
8896c08bec98a3b7f5c1b6fa8fd005586a035617

SHA256
e3edf5e1c47e823f99c16bf388395a3a51708f492fdd057b58b19660dc96417e

SHA512
e0f9c97b2959bb17de8c351fc315ed9691d5f6154907541baedb29448c70e1f57d64cdf59d6cf7408ed8f229ac123da67f2075c53188ffcf1a562735ac417899

Download Submit
C:\ProgramData\lpvbvb\obslooi.exe
Filesize
281KB

MD5
4492cce08449651654708c03f621ba63

SHA1
8896c08bec98a3b7f5c1b6fa8fd005586a035617

SHA256
e3edf5e1c47e823f99c16bf388395a3a51708f492fdd057b58b19660dc96417e

SHA512
e0f9c97b2959bb17de8c351fc315ed9691d5f6154907541baedb29448c70e1f57d64cdf59d6cf7408ed8f229ac123da67f2075c53188ffcf1a562735ac417899

Download Submit
memory/1240-54-0x00000000753E1000-0x00000000753E3000-memory.dmp

Filesize
8KB

Download
memory/1240-55-0x000000000245A000-0x0000000002460000-memory.dmp

Filesize
24KB

Download
memory/1240-56-0x0000000000020000-0x0000000000029000-memory.dmp

Filesize
36KB

Download
memory/1240-57-0x0000000000400000-0x0000000002304000-memory.dmp

Filesize
31.0MB

Download
memory/1544-59-0x0000000000000000-mapping.dmp

Download
memory/1544-62-0x000000000030A000-0x0000000000310000-memory.dmp

Filesize
24KB

Download
memory/1544-63-0x0000000000400000-0x0000000002304000-memory.dmp

Filesize
31.0MB

Download

Analysis

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