systembc | 83accd1cbe7ed2c6db27dcc000e940ab475b40dec95847779cc47905aaa909ea

max time kernel
1798s
max time network
1801s
platform
windows7_x64
resource
win7-20240319-en
resource tags

arch:x64arch:x86image:win7-20240319-enlocale:en-usos:windows7-x64system
submitted
09/04/2024, 08:13

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General

Target

sample.exe
Size

171KB
MD5

8e3a80163ebba090c69ecdeec8860c8b
SHA1

3beb3fdd46f78d54c19f5d66f46172d6f5cde830
SHA256

c68035aabbe9b80ace209290aa28b8108cbb03a9d6a6301eb9a8d638db024ad0
SHA512

fe327e9f59d87f333ec0b2fcae916f41af8e5df5edaa2a2085e7998f3903746ad7de8b891f553b81d44ee49098de3105fae24e380c540b50c78a96ffc859da03
SSDEEP

3072:PGq7Cm2r13QuGGz7qr+qf8v0knEyc9TXA2J:Pj7jmGqqrlfGDcfJ

Score

10^/10

systembc discovery trojan upx

Malware Config

Extracted

Family

systembc

admex175x.xyz:4044

servx278x.xyz:4044

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
Contacts a large (643) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Executes dropped EXE 1 IoCs

pid	Process
2660	ewsdc.exe

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/files/0x000d000000012258-7.dat	upx

Unexpected DNS network traffic destination 1 IoCs

Network traffic to other servers than the configured DNS servers was detected on the DNS port.

description	ioc
Destination IP	88.198.207.48

Looks up external IP address via web service 4 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

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

Uses Tor communications 1 TTPs
Malware can proxy its traffic through Tor for more anonymity.

Proxy
T1090

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\ewsdc.job	sample.exe
File opened for modification	C:\Windows\Tasks\ewsdc.job	sample.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1684	sample.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2580 wrote to memory of 2660	2580	taskeng.exe	29
PID 2580 wrote to memory of 2660	2580	taskeng.exe	29
PID 2580 wrote to memory of 2660	2580	taskeng.exe	29
PID 2580 wrote to memory of 2660	2580	taskeng.exe	29

C:\Users\Admin\AppData\Local\Temp\sample.exe
"C:\Users\Admin\AppData\Local\Temp\sample.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1684

C:\Windows\system32\taskeng.exe
taskeng.exe {2614E71B-9CA7-4D04-9493-43767005C69C} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:2580
- C:\ProgramData\ccopoon\ewsdc.exe
  C:\ProgramData\ccopoon\ewsdc.exe start
  2⤵
  - Executes dropped EXE
  PID:2660

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Command and Control

Proxy

T1090

Exfiltration

Impact

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Downloads

C:\ProgramData\ccopoon\ewsdc.exe

Filesize
171KB

MD5
8e3a80163ebba090c69ecdeec8860c8b

SHA1
3beb3fdd46f78d54c19f5d66f46172d6f5cde830

SHA256
c68035aabbe9b80ace209290aa28b8108cbb03a9d6a6301eb9a8d638db024ad0

SHA512
fe327e9f59d87f333ec0b2fcae916f41af8e5df5edaa2a2085e7998f3903746ad7de8b891f553b81d44ee49098de3105fae24e380c540b50c78a96ffc859da03

Download Submit
memory/1684-1-0x00000000052D0000-0x00000000053D0000-memory.dmp

Filesize
1024KB

Download
memory/1684-2-0x0000000000020000-0x0000000000029000-memory.dmp

Filesize
36KB

Download
memory/1684-3-0x0000000000400000-0x0000000005162000-memory.dmp

Filesize
77.4MB

Download
memory/1684-13-0x00000000052D0000-0x00000000053D0000-memory.dmp

Filesize
1024KB

Download
memory/2660-10-0x0000000005220000-0x0000000005320000-memory.dmp

Filesize
1024KB

Download
memory/2660-11-0x0000000000020000-0x0000000000029000-memory.dmp

Filesize
36KB

Download
memory/2660-14-0x0000000000400000-0x0000000005162000-memory.dmp

Filesize
77.4MB

Download
memory/2660-18-0x0000000005220000-0x0000000005320000-memory.dmp

Filesize
1024KB

Download