systembc | 83accd1cbe7ed2c6db27dcc000e940ab475b40dec95847779cc47905aaa909ea

max time kernel
145s
max time network
147s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
13/04/2024, 09:21

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General

Target
sample.exe
Size 171KB
Sample240413-lbdvmsfe71
SHA256 c68035aabbe9b80ace209290aa28b8108cbb03a9d6a6301eb9a8d638db024ad0
MD5 8e3a80163ebba090c69ecdeec8860c8b
SHA1 3beb3fdd46f78d54c19f5d66f46172d6f5cde830
SHA512 fe327e9f59d87f333ec0b2fcae916f41af8e5df5edaa2a2085e7998f3903746ad7de8b891f553b81d44ee49098de3105fae24e380c540b50c78a96ffc859da03
SSDEEP 3072:PGq7Cm2r13QuGGz7qr+qf8v0knEyc9TXA2J:Pj7jmGqqrlfGDcfJ
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

systembc 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

Executes dropped EXE 1 IoCs

pid	Process
2652	qcbfba.exe

UPX packed file 1 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000c0000000136fc-6.dat	upx

Looks up external IP address via web service 3 IoCs

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

flow	ioc
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\qcbfba.job	sample.exe
File opened for modification	C:\Windows\Tasks\qcbfba.job	sample.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2028	sample.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2964 wrote to memory of 2652	2964	taskeng.exe	29
PID 2964 wrote to memory of 2652	2964	taskeng.exe	29
PID 2964 wrote to memory of 2652	2964	taskeng.exe	29
PID 2964 wrote to memory of 2652	2964	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:2028

C:\Windows\system32\taskeng.exe
taskeng.exe {4A620CD5-B5E5-4705-9BF3-82EE4C79344F} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:2964
- C:\ProgramData\utkc\qcbfba.exe
  C:\ProgramData\utkc\qcbfba.exe start
  2⤵
  - Executes dropped EXE
  PID:2652

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Proxy

T1090

Exfiltration

Impact

Replay Monitor

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Downloads

qcbfba.exe

Path C:\ProgramData\utkc\qcbfba.exe
Size 171KB
SHA256 c68035aabbe9b80ace209290aa28b8108cbb03a9d6a6301eb9a8d638db024ad0
MD5 8e3a80163ebba090c69ecdeec8860c8b
SHA1 3beb3fdd46f78d54c19f5d66f46172d6f5cde830
SHA512 fe327e9f59d87f333ec0b2fcae916f41af8e5df5edaa2a2085e7998f3903746ad7de8b891f553b81d44ee49098de3105fae24e380c540b50c78a96ffc859da03
SSDEEP 3072:PGq7Cm2r13QuGGz7qr+qf8v0knEyc9TXA2J:Pj7jmGqqrlfGDcfJ
MD5 SHA1 SHA512 SSDEEP

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memory/2028-1-0x00000000055B0000-0x00000000056B0000-memory.dmp

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memory/2028-2-0x0000000000020000-0x0000000000029000-memory.dmp

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memory/2028-9-0x0000000000400000-0x0000000005162000-memory.dmp

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memory/2028-13-0x00000000055B0000-0x00000000056B0000-memory.dmp

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memory/2652-10-0x0000000000230000-0x0000000000330000-memory.dmp

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memory/2652-12-0x0000000000400000-0x0000000005162000-memory.dmp

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memory/2652-16-0x0000000000230000-0x0000000000330000-memory.dmp

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