systembc | 42a191ee4f9593db8f514cce85ad8b9d6533bc71983a9529e7a5d68764d21679

Resubmissions

15-04-2024 11:31

240415-nmzycsff4y 10

10-04-2024 04:57

10-04-2024 04:57

10-04-2024 04:57

10-04-2024 04:57

19-12-2023 13:06

Analysis

max time kernel
296s
max time network
303s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
10-04-2024 04:57

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General

Target

2d3ba7dd14b9a579b2626fa5baee19bd.exe
Size

209KB
MD5

2d3ba7dd14b9a579b2626fa5baee19bd
SHA1

dd365103583cfb3c10b73efc6592f8b80c1d75e0
SHA256

42a191ee4f9593db8f514cce85ad8b9d6533bc71983a9529e7a5d68764d21679
SHA512

29efd1035df73572efea0d96017772481b9858855c12d1bb96fc6a4ccd49443a4bb0d1bd86c69dda4218f04e8855ec37c4515157b75a240a530792232c4f03c0
SSDEEP

6144:YDnLgI91y1UkT57iJz/DpURWPSvHuUiYphu1UY:cnLh9yn52rpUR5vHuRYpM+Y

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
3804	mfcifb.exe

UPX packed file 1 IoCs

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

upx

resource	yara_rule
behavioral3/files/0x0004000000022ea3-7.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
23	api.ipify.org
24	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\mfcifb.job	2d3ba7dd14b9a579b2626fa5baee19bd.exe
File opened for modification	C:\Windows\Tasks\mfcifb.job	2d3ba7dd14b9a579b2626fa5baee19bd.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3276	1996	WerFault.exe	91

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1996	2d3ba7dd14b9a579b2626fa5baee19bd.exe
1996	2d3ba7dd14b9a579b2626fa5baee19bd.exe

C:\Users\Admin\AppData\Local\Temp\2d3ba7dd14b9a579b2626fa5baee19bd.exe
"C:\Users\Admin\AppData\Local\Temp\2d3ba7dd14b9a579b2626fa5baee19bd.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1996
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1996 -s 480
  2⤵
  - Program crash
  PID:3276

C:\ProgramData\etrbew\mfcifb.exe
C:\ProgramData\etrbew\mfcifb.exe start
1⤵
- Executes dropped EXE
PID:3804

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=5164 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8
1⤵
PID:4984

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1996 -ip 1996
1⤵
PID:1676

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\etrbew\mfcifb.exe

Filesize
209KB

MD5
2d3ba7dd14b9a579b2626fa5baee19bd

SHA1
dd365103583cfb3c10b73efc6592f8b80c1d75e0

SHA256
42a191ee4f9593db8f514cce85ad8b9d6533bc71983a9529e7a5d68764d21679

SHA512
29efd1035df73572efea0d96017772481b9858855c12d1bb96fc6a4ccd49443a4bb0d1bd86c69dda4218f04e8855ec37c4515157b75a240a530792232c4f03c0

Download Submit
memory/1996-1-0x0000000004700000-0x0000000004800000-memory.dmp

Filesize
1024KB

Download
memory/1996-2-0x00000000001C0000-0x00000000001C9000-memory.dmp

Filesize
36KB

Download
memory/1996-3-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

Download
memory/1996-14-0x0000000004700000-0x0000000004800000-memory.dmp

Filesize
1024KB

Download
memory/1996-25-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

Download
memory/3804-10-0x0000000004920000-0x0000000004A20000-memory.dmp

Filesize
1024KB

Download
memory/3804-11-0x00000000001C0000-0x00000000001C9000-memory.dmp

Filesize
36KB

Download
memory/3804-13-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

Download
memory/3804-17-0x0000000004920000-0x0000000004A20000-memory.dmp

Filesize
1024KB

Download