systembc | 2ff18fb4a4d05b7d419a88167d7001bb000eac2f4861bf3849a713b6b701f4c9

Resubmissions

18/04/2024, 11:08

240418-m8wmdsbc2710

18/04/2024, 11:08

18/04/2024, 11:08

18/04/2024, 11:08

18/04/2024, 11:08

18/04/2024, 09:41

Analysis

max time kernel
598s
max time network
599s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
18/04/2024, 11:08

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General

Target
2ff18fb4a4d05b7d419a88167d7001bb000eac2f4861bf3849a713b6b701f4c9.exe
Size 209KB
Sample240418-m8mpgsbc24
SHA256 2ff18fb4a4d05b7d419a88167d7001bb000eac2f4861bf3849a713b6b701f4c9
MD5 8e9ddb099e71555326413d9a3a930584
SHA1 96350dae3f42d37341b3da7410aabe5c42384156
SHA512 8d34f32ee48e3d399e020ba3ab4eeab9f1fbdb55a4a5b61b120280975990058221c75be001d09b4f804400977bb769e9ba1fdbd68e90f7db97bd78a69001f09c
SSDEEP 6144:YDnLgI91y1UkT57iJz/DpURWPSvHuUiYphu1Ux:cnLh9yn52rpUR5vHuRYpM+x
MD5 SHA1 SHA512 SSDEEP

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
1300	acfjaqi.exe

UPX packed file 1 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0033000000013f21-6.dat	upx

Unexpected DNS network traffic destination 3 IoCs

Network traffic to other servers than the configured DNS servers was detected on the DNS port.

description	ioc
Destination IP	88.216.223.3
Destination IP	88.198.207.48
Destination IP	88.198.207.48

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
5	api.ipify.org
6	api.ipify.org
7	ip4.seeip.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\acfjaqi.job	2ff18fb4a4d05b7d419a88167d7001bb000eac2f4861bf3849a713b6b701f4c9.exe
File opened for modification	C:\Windows\Tasks\acfjaqi.job	2ff18fb4a4d05b7d419a88167d7001bb000eac2f4861bf3849a713b6b701f4c9.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1724	2ff18fb4a4d05b7d419a88167d7001bb000eac2f4861bf3849a713b6b701f4c9.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1584 wrote to memory of 1300	1584	taskeng.exe	29
PID 1584 wrote to memory of 1300	1584	taskeng.exe	29
PID 1584 wrote to memory of 1300	1584	taskeng.exe	29
PID 1584 wrote to memory of 1300	1584	taskeng.exe	29

C:\Users\Admin\AppData\Local\Temp\2ff18fb4a4d05b7d419a88167d7001bb000eac2f4861bf3849a713b6b701f4c9.exe
"C:\Users\Admin\AppData\Local\Temp\2ff18fb4a4d05b7d419a88167d7001bb000eac2f4861bf3849a713b6b701f4c9.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1724

C:\Windows\system32\taskeng.exe
taskeng.exe {392F633B-6D15-4CC6-9256-0534C2BA1647} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1584
- C:\ProgramData\fjkl\acfjaqi.exe
  C:\ProgramData\fjkl\acfjaqi.exe start
  2⤵
  - Executes dropped EXE
  PID:1300

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

acfjaqi.exe

Path C:\ProgramData\fjkl\acfjaqi.exe
Size 209KB
SHA256 2ff18fb4a4d05b7d419a88167d7001bb000eac2f4861bf3849a713b6b701f4c9
MD5 8e9ddb099e71555326413d9a3a930584
SHA1 96350dae3f42d37341b3da7410aabe5c42384156
SHA512 8d34f32ee48e3d399e020ba3ab4eeab9f1fbdb55a4a5b61b120280975990058221c75be001d09b4f804400977bb769e9ba1fdbd68e90f7db97bd78a69001f09c
SSDEEP 6144:YDnLgI91y1UkT57iJz/DpURWPSvHuUiYphu1Ux:cnLh9yn52rpUR5vHuRYpM+x
MD5 SHA1 SHA512 SSDEEP

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memory/1300-10-0x00000000002B0000-0x00000000003B0000-memory.dmp

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memory/1300-12-0x0000000000400000-0x00000000045F0000-memory.dmp

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memory/1300-16-0x00000000002B0000-0x00000000003B0000-memory.dmp

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memory/1724-1-0x00000000046A0000-0x00000000047A0000-memory.dmp

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memory/1724-2-0x0000000000020000-0x0000000000029000-memory.dmp

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memory/1724-9-0x0000000000400000-0x00000000045F0000-memory.dmp

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memory/1724-13-0x00000000046A0000-0x00000000047A0000-memory.dmp

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