systembc | 046e029c41ac8987649a05e98db75a462e6d42f5f32e871f907036d23ec2d701

Analysis

max time kernel
142s
max time network
57s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
31-12-2024 20:52

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General

Target

JaffaCakes118_3645d634e5976620737eaffe304d30a7.exe
Size

212KB
MD5

3645d634e5976620737eaffe304d30a7
SHA1

6b8f47c29a2710a5dee91f61095b71cd3bb65660
SHA256

046e029c41ac8987649a05e98db75a462e6d42f5f32e871f907036d23ec2d701
SHA512

00014b0a0c892718ea66630137639305da6294636598a90dcafcb7d71869bcd5912c8ee531d9265682321859da8ce4466da8a41347ecab069f182b4ae421862d
SSDEEP

6144:YDnLgI91y1UkT57iJz/DpURWPSvHuUiYphu1U:cnLh9yn52rpUR5vHuRYpM+

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
Systembc family
systembc

Executes dropped EXE 1 IoCs

pid	Process
2444	pwatwju.exe

Looks up external IP address via web service 3 IoCs

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

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

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2336-1-0x0000000000400000-0x00000000045F0000-memory.dmp	upx
behavioral1/files/0x000800000001957c-9.dat	upx

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\pwatwju.job	JaffaCakes118_3645d634e5976620737eaffe304d30a7.exe
File opened for modification	C:\Windows\Tasks\pwatwju.job	JaffaCakes118_3645d634e5976620737eaffe304d30a7.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_3645d634e5976620737eaffe304d30a7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pwatwju.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2336	JaffaCakes118_3645d634e5976620737eaffe304d30a7.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1624 wrote to memory of 2444	1624	taskeng.exe	30
PID 1624 wrote to memory of 2444	1624	taskeng.exe	30
PID 1624 wrote to memory of 2444	1624	taskeng.exe	30
PID 1624 wrote to memory of 2444	1624	taskeng.exe	30

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_3645d634e5976620737eaffe304d30a7.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_3645d634e5976620737eaffe304d30a7.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:2336

C:\Windows\system32\taskeng.exe
taskeng.exe {EFA8A8DE-28BB-4E49-A392-A8317C4214B8} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1624
- C:\ProgramData\ccck\pwatwju.exe
  C:\ProgramData\ccck\pwatwju.exe start
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2444

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\ccck\pwatwju.exe

Filesize
212KB

MD5
3645d634e5976620737eaffe304d30a7

SHA1
6b8f47c29a2710a5dee91f61095b71cd3bb65660

SHA256
046e029c41ac8987649a05e98db75a462e6d42f5f32e871f907036d23ec2d701

SHA512
00014b0a0c892718ea66630137639305da6294636598a90dcafcb7d71869bcd5912c8ee531d9265682321859da8ce4466da8a41347ecab069f182b4ae421862d

Download Submit
memory/2336-1-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

Download
memory/2336-2-0x0000000000020000-0x0000000000029000-memory.dmp

Filesize
36KB

Download
memory/2336-3-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2336-4-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

Download
memory/2444-13-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

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