systembc | 5d366decba2f9078f457cb35fe7bfd198760683a709f0d33745fc6e0ba59ac8a

Resubmissions

16-05-2022 16:24

220516-twn54sddfp 10

Analysis

max time kernel
149s
max time network
148s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
14-04-2024 14:32

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General

Target

5d366decba2f9078f457cb35fe7bfd198760683a709f0d33745fc6e0ba59ac8a.exe
Size

222KB
MD5

72cfa33b978294103889481feca472f2
SHA1

0615eb31fd67345b9fa0d57d12a3bcb363152abe
SHA256

5d366decba2f9078f457cb35fe7bfd198760683a709f0d33745fc6e0ba59ac8a
SHA512

d1de5fee23b7a858ec62b849cd8a41cf896ab8b6df4836c65ba36942c1d1727b36832d45713a578c93e8a0b8650bf55923568637d91bb9b2196257a2ae015559
SSDEEP

3072:m04yjyyUD1HncBNyBNp5oEug4OkyJAQF1G8Xrrw+cC+lJDJEQkjvuMM:SR1HUUPCEZ4OkyJ9rrw+cZTuZSMM

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

fanstat18.club:4044

dexblog90.club:4044

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
Executes dropped EXE 2 IoCs

Processes:

dsrfm.exedsrfm.exe

pid process

2896 dsrfm.exe
2304 dsrfm.exe
Looks up external IP address via web service 4 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

6 api.ipify.org
7 ip4.seeip.org
8 ip4.seeip.org
5 api.ipify.org
Uses Tor communications 1 TTPs
Malware can proxy its traffic through Tor for more anonymity.

Proxy
T1090

pid	process
2896	dsrfm.exe
2304	dsrfm.exe

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

Drops file in Windows directory 2 IoCs

Processes:

5d366decba2f9078f457cb35fe7bfd198760683a709f0d33745fc6e0ba59ac8a.exe

description	ioc	process
File created	C:\Windows\Tasks\dsrfm.job	5d366decba2f9078f457cb35fe7bfd198760683a709f0d33745fc6e0ba59ac8a.exe
File opened for modification	C:\Windows\Tasks\dsrfm.job	5d366decba2f9078f457cb35fe7bfd198760683a709f0d33745fc6e0ba59ac8a.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

5d366decba2f9078f457cb35fe7bfd198760683a709f0d33745fc6e0ba59ac8a.exe

pid process

2812 5d366decba2f9078f457cb35fe7bfd198760683a709f0d33745fc6e0ba59ac8a.exe

pid	process
2812	5d366decba2f9078f457cb35fe7bfd198760683a709f0d33745fc6e0ba59ac8a.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 2228 wrote to memory of 2896	2228	taskeng.exe	dsrfm.exe
PID 2228 wrote to memory of 2896	2228	taskeng.exe	dsrfm.exe
PID 2228 wrote to memory of 2896	2228	taskeng.exe	dsrfm.exe
PID 2228 wrote to memory of 2896	2228	taskeng.exe	dsrfm.exe
PID 2228 wrote to memory of 2304	2228	taskeng.exe	dsrfm.exe
PID 2228 wrote to memory of 2304	2228	taskeng.exe	dsrfm.exe
PID 2228 wrote to memory of 2304	2228	taskeng.exe	dsrfm.exe
PID 2228 wrote to memory of 2304	2228	taskeng.exe	dsrfm.exe

C:\Users\Admin\AppData\Local\Temp\5d366decba2f9078f457cb35fe7bfd198760683a709f0d33745fc6e0ba59ac8a.exe
"C:\Users\Admin\AppData\Local\Temp\5d366decba2f9078f457cb35fe7bfd198760683a709f0d33745fc6e0ba59ac8a.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:2812

C:\Windows\system32\taskeng.exe
taskeng.exe {8E018B1A-5F2B-403E-90CE-2E9B9E81C3F7} S-1-5-21-330940541-141609230-1670313778-1000:KXIPPCKF\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2228

C:\ProgramData\pahtmxg\dsrfm.exe
C:\ProgramData\pahtmxg\dsrfm.exe start2
2⤵
- Executes dropped EXE
PID:2896

C:\ProgramData\pahtmxg\dsrfm.exe
C:\ProgramData\pahtmxg\dsrfm.exe start2
2⤵
- Executes dropped EXE
PID:2304

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Proxy

T1090

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\ProgramData\pahtmxg\dsrfm.exe
Filesize
222KB

MD5
72cfa33b978294103889481feca472f2

SHA1
0615eb31fd67345b9fa0d57d12a3bcb363152abe

SHA256
5d366decba2f9078f457cb35fe7bfd198760683a709f0d33745fc6e0ba59ac8a

SHA512
d1de5fee23b7a858ec62b849cd8a41cf896ab8b6df4836c65ba36942c1d1727b36832d45713a578c93e8a0b8650bf55923568637d91bb9b2196257a2ae015559

Download Submit
memory/2304-30-0x0000000000590000-0x0000000000690000-memory.dmp

Filesize
1024KB

Download
memory/2304-31-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/2304-33-0x0000000000590000-0x0000000000690000-memory.dmp

Filesize
1024KB

Download
memory/2812-1-0x0000000000290000-0x0000000000390000-memory.dmp

Filesize
1024KB

Download
memory/2812-3-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/2812-2-0x00000000001B0000-0x00000000001B9000-memory.dmp

Filesize
36KB

Download
memory/2812-13-0x0000000000290000-0x0000000000390000-memory.dmp

Filesize
1024KB

Download
memory/2896-12-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/2896-11-0x0000000000600000-0x0000000000700000-memory.dmp

Filesize
1024KB

Download
memory/2896-18-0x0000000000600000-0x0000000000700000-memory.dmp

Filesize
1024KB

Download