systembc | 046e029c41ac8987649a05e98db75a462e6d42f5f32e871f907036d23ec2d701

Analysis

max time kernel
295s
max time network
300s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
16/04/2024, 11:08

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General

Target

046e029c41ac8987649a05e98db75a462e6d42f5f32e871f907036d23ec2d701.exe
Size

212KB
MD5

3645d634e5976620737eaffe304d30a7
SHA1

6b8f47c29a2710a5dee91f61095b71cd3bb65660
SHA256

046e029c41ac8987649a05e98db75a462e6d42f5f32e871f907036d23ec2d701
SHA512

00014b0a0c892718ea66630137639305da6294636598a90dcafcb7d71869bcd5912c8ee531d9265682321859da8ce4466da8a41347ecab069f182b4ae421862d
SSDEEP

6144:YDnLgI91y1UkT57iJz/DpURWPSvHuUiYphu1U:cnLh9yn52rpUR5vHuRYpM+

Score

10^/10

systembc trojan upx

Malware Config

Extracted

Family

systembc

yan0212.com:4039

yan0212.net:4039

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc

Executes dropped EXE 1 IoCs

pid	Process
3096	bashk.exe

UPX packed file 1 IoCs

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

upx

resource	yara_rule
behavioral3/files/0x000b00000002335a-6.dat	upx

Looks up external IP address via web service 2 IoCs

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

flow	ioc
33	api.ipify.org
34	api.ipify.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\bashk.job	046e029c41ac8987649a05e98db75a462e6d42f5f32e871f907036d23ec2d701.exe
File opened for modification	C:\Windows\Tasks\bashk.job	046e029c41ac8987649a05e98db75a462e6d42f5f32e871f907036d23ec2d701.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1416	4988	WerFault.exe	82

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4988	046e029c41ac8987649a05e98db75a462e6d42f5f32e871f907036d23ec2d701.exe
4988	046e029c41ac8987649a05e98db75a462e6d42f5f32e871f907036d23ec2d701.exe

C:\Users\Admin\AppData\Local\Temp\046e029c41ac8987649a05e98db75a462e6d42f5f32e871f907036d23ec2d701.exe
"C:\Users\Admin\AppData\Local\Temp\046e029c41ac8987649a05e98db75a462e6d42f5f32e871f907036d23ec2d701.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:4988
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4988 -s 948
  2⤵
  - Program crash
  PID:1416

C:\ProgramData\pqmlf\bashk.exe
C:\ProgramData\pqmlf\bashk.exe start
1⤵
- Executes dropped EXE
PID:3096

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4988 -ip 4988
1⤵
PID:3376

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

C:\ProgramData\pqmlf\bashk.exe

Filesize
212KB

MD5
3645d634e5976620737eaffe304d30a7

SHA1
6b8f47c29a2710a5dee91f61095b71cd3bb65660

SHA256
046e029c41ac8987649a05e98db75a462e6d42f5f32e871f907036d23ec2d701

SHA512
00014b0a0c892718ea66630137639305da6294636598a90dcafcb7d71869bcd5912c8ee531d9265682321859da8ce4466da8a41347ecab069f182b4ae421862d

Download Submit
memory/3096-10-0x0000000004920000-0x0000000004A20000-memory.dmp

Filesize
1024KB

Download
memory/3096-11-0x00000000001C0000-0x00000000001C9000-memory.dmp

Filesize
36KB

Download
memory/3096-13-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

Download
memory/3096-17-0x0000000004920000-0x0000000004A20000-memory.dmp

Filesize
1024KB

Download
memory/4988-1-0x0000000004620000-0x0000000004720000-memory.dmp

Filesize
1024KB

Download
memory/4988-2-0x00000000001C0000-0x00000000001C9000-memory.dmp

Filesize
36KB

Download
memory/4988-9-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

Download
memory/4988-14-0x0000000004620000-0x0000000004720000-memory.dmp

Filesize
1024KB

Download
memory/4988-25-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

Download