systembc | 8163d2dd713dc31d3a0a234985d7dc735d1106783a401ce585508fefc56230dc

Analysis

max time kernel
141s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
09-01-2025 00:26

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General

Target

JaffaCakes118_b4d9f02fa75686adbfd3ee433b4a4203.exe
Size

209KB
MD5

b4d9f02fa75686adbfd3ee433b4a4203
SHA1

2c7d0420ca979ab6faeea5c6fdf7135963f12e87
SHA256

8163d2dd713dc31d3a0a234985d7dc735d1106783a401ce585508fefc56230dc
SHA512

bb5083ddc33af84ef768826b4b20ef3654f044cd1dfee6d81ccca5ed111446fb8c8762fb5c4c0a20ed1da19af7b40d10daf51ecd2b0e273d5ecffc4b29ed91cc
SSDEEP

6144:YDnLgI91y1UkT57iJz/DpURWPSvHuUiYphu1Ua:cnLh9yn52rpUR5vHuRYpM+a

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
3728	ixmdbvk.exe

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

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3052-1-0x0000000000400000-0x00000000045F0000-memory.dmp	upx
behavioral2/files/0x0007000000023c9d-9.dat	upx

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\ixmdbvk.job	JaffaCakes118_b4d9f02fa75686adbfd3ee433b4a4203.exe
File opened for modification	C:\Windows\Tasks\ixmdbvk.job	JaffaCakes118_b4d9f02fa75686adbfd3ee433b4a4203.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2196	3052	WerFault.exe	82

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_b4d9f02fa75686adbfd3ee433b4a4203.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ixmdbvk.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3052	JaffaCakes118_b4d9f02fa75686adbfd3ee433b4a4203.exe
3052	JaffaCakes118_b4d9f02fa75686adbfd3ee433b4a4203.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b4d9f02fa75686adbfd3ee433b4a4203.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b4d9f02fa75686adbfd3ee433b4a4203.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:3052
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3052 -s 484
  2⤵
  - Program crash
  PID:2196

C:\ProgramData\tfkubg\ixmdbvk.exe
C:\ProgramData\tfkubg\ixmdbvk.exe start
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3728

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3052 -ip 3052
1⤵
PID:1860

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\tfkubg\ixmdbvk.exe

Filesize
209KB

MD5
b4d9f02fa75686adbfd3ee433b4a4203

SHA1
2c7d0420ca979ab6faeea5c6fdf7135963f12e87

SHA256
8163d2dd713dc31d3a0a234985d7dc735d1106783a401ce585508fefc56230dc

SHA512
bb5083ddc33af84ef768826b4b20ef3654f044cd1dfee6d81ccca5ed111446fb8c8762fb5c4c0a20ed1da19af7b40d10daf51ecd2b0e273d5ecffc4b29ed91cc

Download Submit
memory/3052-1-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

Download
memory/3052-3-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3052-2-0x00000000001C0000-0x00000000001C9000-memory.dmp

Filesize
36KB

Download
memory/3052-4-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

Download
memory/3052-23-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

Download
memory/3052-25-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3728-13-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

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