systembc | dfe0c8f95bf96e2be4666d73ef9cd166e89eef631e975aa2e384d9f1af901d45

Resubmissions

10/04/2024, 03:05

240410-dld96afg4v10

10/04/2024, 03:04

10/04/2024, 03:04

10/04/2024, 03:04

10/04/2024, 03:04

01/04/2024, 07:13

31/03/2024, 20:35

Analysis

max time kernel
1799s
max time network
1803s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
10/04/2024, 03:04

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Report Analysis Logs

General

Target
5d7e265ed53bd43d40f6457318a0921d_JaffaCakes118.exe
Size 209KB
Sample240410-dk1f1acd86
SHA256 dfe0c8f95bf96e2be4666d73ef9cd166e89eef631e975aa2e384d9f1af901d45
MD5 5d7e265ed53bd43d40f6457318a0921d
SHA1 08d676809ac123f9a42a7ad4c8b86a3f2237580d
SHA512 3f1c65337295aefff9781e099a7d298f2308f5639ab0fc34cc1e716b68991b6abdac195964083bb7d3bdc36ca25a4652ab482fd943ca1f4190c71222b60d7a43
SSDEEP 6144:YDnLgI91y1UkT57iJz/DpURWPSvHuUiYphu1UW:cnLh9yn52rpUR5vHuRYpM+W
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

systembc discovery 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
Contacts a large (726) 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
1148	mklhc.exe

UPX packed file 1 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0033000000014aac-6.dat	upx

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
8	ip4.seeip.org
5	api.ipify.org
6	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\mklhc.job	5d7e265ed53bd43d40f6457318a0921d_JaffaCakes118.exe
File opened for modification	C:\Windows\Tasks\mklhc.job	5d7e265ed53bd43d40f6457318a0921d_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2864	5d7e265ed53bd43d40f6457318a0921d_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2064 wrote to memory of 1148	2064	taskeng.exe	29
PID 2064 wrote to memory of 1148	2064	taskeng.exe	29
PID 2064 wrote to memory of 1148	2064	taskeng.exe	29
PID 2064 wrote to memory of 1148	2064	taskeng.exe	29

C:\Users\Admin\AppData\Local\Temp\5d7e265ed53bd43d40f6457318a0921d_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\5d7e265ed53bd43d40f6457318a0921d_JaffaCakes118.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:2864

C:\Windows\system32\taskeng.exe
taskeng.exe {EC4A6048-6ADC-4E65-85A5-7E4AD79D7884} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:2064
- C:\ProgramData\oxxp\mklhc.exe
  C:\ProgramData\oxxp\mklhc.exe start
  2⤵
  - Executes dropped EXE
  PID:1148

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

mklhc.exe

Path C:\ProgramData\oxxp\mklhc.exe
Size 209KB
SHA256 dfe0c8f95bf96e2be4666d73ef9cd166e89eef631e975aa2e384d9f1af901d45
MD5 5d7e265ed53bd43d40f6457318a0921d
SHA1 08d676809ac123f9a42a7ad4c8b86a3f2237580d
SHA512 3f1c65337295aefff9781e099a7d298f2308f5639ab0fc34cc1e716b68991b6abdac195964083bb7d3bdc36ca25a4652ab482fd943ca1f4190c71222b60d7a43
SSDEEP 6144:YDnLgI91y1UkT57iJz/DpURWPSvHuUiYphu1UW:cnLh9yn52rpUR5vHuRYpM+W
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1148-10-0x0000000004690000-0x0000000004790000-memory.dmp

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memory/1148-13-0x0000000000400000-0x00000000045F0000-memory.dmp

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memory/1148-16-0x0000000004690000-0x0000000004790000-memory.dmp

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memory/2864-1-0x00000000046A0000-0x00000000047A0000-memory.dmp

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memory/2864-2-0x0000000000020000-0x0000000000029000-memory.dmp

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memory/2864-9-0x0000000000400000-0x00000000045F0000-memory.dmp

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memory/2864-11-0x00000000046A0000-0x00000000047A0000-memory.dmp

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