systembc | ec7b2cd04228626c74372d58aa236b765d254afa4ec47723c514f256dde1750e

General

Target

ec7b2cd04228626c74372d58aa236b765d254afa4ec47723c514f256dde1750e.exe
Size

87KB
MD5

5781e34d8a456b34ad9d8f7ed8bf9453
SHA1

778cdb0dfbfc4651cedaa985505dd28a33d190aa
SHA256

ec7b2cd04228626c74372d58aa236b765d254afa4ec47723c514f256dde1750e
SHA512

e925c9b9c06249b12d4eaea21c9458668e57d2a7cb9f87625f8a10468ec6e4f70cf97b4e9a63299c939a16b546a6d28bb180b0c5b6de45b3739c002920989af3

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:

olshkxp.exe

pid process

2044 olshkxp.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

5 api.ipify.org
6 api.ipify.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
2044	olshkxp.exe

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

Drops file in Windows directory 2 IoCs

Processes:

ec7b2cd04228626c74372d58aa236b765d254afa4ec47723c514f256dde1750e.exe

description	ioc	process
File opened for modification	C:\Windows\Tasks\olshkxp.job	ec7b2cd04228626c74372d58aa236b765d254afa4ec47723c514f256dde1750e.exe
File created	C:\Windows\Tasks\olshkxp.job	ec7b2cd04228626c74372d58aa236b765d254afa4ec47723c514f256dde1750e.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

ec7b2cd04228626c74372d58aa236b765d254afa4ec47723c514f256dde1750e.exe

pid process

1752 ec7b2cd04228626c74372d58aa236b765d254afa4ec47723c514f256dde1750e.exe

pid	process
1752	ec7b2cd04228626c74372d58aa236b765d254afa4ec47723c514f256dde1750e.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1712 wrote to memory of 2044	1712	taskeng.exe	olshkxp.exe
PID 1712 wrote to memory of 2044	1712	taskeng.exe	olshkxp.exe
PID 1712 wrote to memory of 2044	1712	taskeng.exe	olshkxp.exe
PID 1712 wrote to memory of 2044	1712	taskeng.exe	olshkxp.exe

C:\Users\Admin\AppData\Local\Temp\ec7b2cd04228626c74372d58aa236b765d254afa4ec47723c514f256dde1750e.exe
"C:\Users\Admin\AppData\Local\Temp\ec7b2cd04228626c74372d58aa236b765d254afa4ec47723c514f256dde1750e.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1752

C:\Windows\system32\taskeng.exe
taskeng.exe {6DAEAF14-9778-4012-B89C-3D616D663D65} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1712

C:\ProgramData\vkpa\olshkxp.exe
C:\ProgramData\vkpa\olshkxp.exe start
2⤵
- Executes dropped EXE
PID:2044

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\vkpa\olshkxp.exe
Filesize
87KB

MD5
5781e34d8a456b34ad9d8f7ed8bf9453

SHA1
778cdb0dfbfc4651cedaa985505dd28a33d190aa

SHA256
ec7b2cd04228626c74372d58aa236b765d254afa4ec47723c514f256dde1750e

SHA512
e925c9b9c06249b12d4eaea21c9458668e57d2a7cb9f87625f8a10468ec6e4f70cf97b4e9a63299c939a16b546a6d28bb180b0c5b6de45b3739c002920989af3

Download Submit
C:\ProgramData\vkpa\olshkxp.exe
Filesize
87KB

MD5
5781e34d8a456b34ad9d8f7ed8bf9453

SHA1
778cdb0dfbfc4651cedaa985505dd28a33d190aa

SHA256
ec7b2cd04228626c74372d58aa236b765d254afa4ec47723c514f256dde1750e

SHA512
e925c9b9c06249b12d4eaea21c9458668e57d2a7cb9f87625f8a10468ec6e4f70cf97b4e9a63299c939a16b546a6d28bb180b0c5b6de45b3739c002920989af3

Download Submit
memory/1752-54-0x00000000750C1000-0x00000000750C3000-memory.dmp

Filesize
8KB

Download
memory/1752-56-0x0000000000220000-0x0000000000229000-memory.dmp

Filesize
36KB

Download
memory/1752-55-0x000000000342B000-0x0000000003432000-memory.dmp

Filesize
28KB

Download
memory/1752-57-0x0000000000400000-0x0000000002FA1000-memory.dmp

Filesize
43.6MB

Download
memory/2044-59-0x0000000000000000-mapping.dmp

Download
memory/2044-62-0x000000000310B000-0x0000000003112000-memory.dmp

Filesize
28KB

Download
memory/2044-63-0x0000000000400000-0x0000000002FA1000-memory.dmp

Filesize
43.6MB

Download

Analysis

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