systembc | 0b0466996b77c223295a05899525df93489cfda27c7c95b78bec4c6a595629d5

Resubmissions

07-05-2024 12:39

240507-pvlldaga51 10

07-05-2024 12:38

07-05-2024 12:38

07-05-2024 12:38

07-05-2024 12:38

25-04-2024 12:54

Analysis

max time kernel
1198s
max time network
1200s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
07-05-2024 12:38

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General

Target

0b0466996b77c223295a05899525df93489cfda27c7c95b78bec4c6a595629d5.exe
Size

30KB
MD5

87968a631411cdf26058e8ae5a0902a5
SHA1

a09dc0e8855780430d10811834da6504eb1d72ad
SHA256

0b0466996b77c223295a05899525df93489cfda27c7c95b78bec4c6a595629d5
SHA512

07ce6246217a61085ae0ab7a6fade6429d7d946c4970ce79c1a7e22e1fc5f15949a09a0b04ec5bdc00cfd7bb5b11b6cfc5d8fbc9a3f39875443a1bbe7301644e
SSDEEP

768:4TwkPr8C6fuFdaAna6DCPt34GuYY92rjnPoJlvcaII1:MV8C6fuFdaz6+O1n2rjnPo7

Score

10^/10

systembc discovery trojan

Malware Config

Extracted

Family

systembc

pzlkxadvert475.xyz:4044

pzfdmserv275.xyz:4044

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
Contacts a large (639) 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
1720	iigueu.exe

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	88.216.223.5

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
7	ip4.seeip.org
4	api.ipify.org
5	api.ipify.org
6	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\iigueu.job	0b0466996b77c223295a05899525df93489cfda27c7c95b78bec4c6a595629d5.exe
File opened for modification	C:\Windows\Tasks\iigueu.job	0b0466996b77c223295a05899525df93489cfda27c7c95b78bec4c6a595629d5.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1328	0b0466996b77c223295a05899525df93489cfda27c7c95b78bec4c6a595629d5.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2172 wrote to memory of 1720	2172	taskeng.exe	29
PID 2172 wrote to memory of 1720	2172	taskeng.exe	29
PID 2172 wrote to memory of 1720	2172	taskeng.exe	29
PID 2172 wrote to memory of 1720	2172	taskeng.exe	29

C:\Users\Admin\AppData\Local\Temp\0b0466996b77c223295a05899525df93489cfda27c7c95b78bec4c6a595629d5.exe
"C:\Users\Admin\AppData\Local\Temp\0b0466996b77c223295a05899525df93489cfda27c7c95b78bec4c6a595629d5.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1328

C:\Windows\system32\taskeng.exe
taskeng.exe {381CAB70-D172-401D-B1F8-3E90B6400CCA} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:2172
- C:\ProgramData\fxndrv\iigueu.exe
  C:\ProgramData\fxndrv\iigueu.exe start
  2⤵
  - Executes dropped EXE
  PID:1720

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

Replay Monitor

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Downloads

C:\ProgramData\fxndrv\iigueu.exe

Filesize
30KB

MD5
87968a631411cdf26058e8ae5a0902a5

SHA1
a09dc0e8855780430d10811834da6504eb1d72ad

SHA256
0b0466996b77c223295a05899525df93489cfda27c7c95b78bec4c6a595629d5

SHA512
07ce6246217a61085ae0ab7a6fade6429d7d946c4970ce79c1a7e22e1fc5f15949a09a0b04ec5bdc00cfd7bb5b11b6cfc5d8fbc9a3f39875443a1bbe7301644e

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