systembc | 5d366decba2f9078f457cb35fe7bfd198760683a709f0d33745fc6e0ba59ac8a

Analysis

max time kernel
139s
max time network
142s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
30-07-2024 13:58

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General

Target

72cfa33b978294103889481feca472f2_JaffaCakes118.exe
Size

222KB
MD5

72cfa33b978294103889481feca472f2
SHA1

0615eb31fd67345b9fa0d57d12a3bcb363152abe
SHA256

5d366decba2f9078f457cb35fe7bfd198760683a709f0d33745fc6e0ba59ac8a
SHA512

d1de5fee23b7a858ec62b849cd8a41cf896ab8b6df4836c65ba36942c1d1727b36832d45713a578c93e8a0b8650bf55923568637d91bb9b2196257a2ae015559
SSDEEP

3072:m04yjyyUD1HncBNyBNp5oEug4OkyJAQF1G8Xrrw+cC+lJDJEQkjvuMM:SR1HUUPCEZ4OkyJ9rrw+cZTuZSMM

Score

10^/10

systembc discovery 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

pid	Process
2816	skhejs.exe
2012	skhejs.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.

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

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\skhejs.job	72cfa33b978294103889481feca472f2_JaffaCakes118.exe
File opened for modification	C:\Windows\Tasks\skhejs.job	72cfa33b978294103889481feca472f2_JaffaCakes118.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	72cfa33b978294103889481feca472f2_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	skhejs.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1584	72cfa33b978294103889481feca472f2_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2236 wrote to memory of 2816	2236	taskeng.exe	32
PID 2236 wrote to memory of 2816	2236	taskeng.exe	32
PID 2236 wrote to memory of 2816	2236	taskeng.exe	32
PID 2236 wrote to memory of 2816	2236	taskeng.exe	32
PID 2236 wrote to memory of 2012	2236	taskeng.exe	33
PID 2236 wrote to memory of 2012	2236	taskeng.exe	33
PID 2236 wrote to memory of 2012	2236	taskeng.exe	33
PID 2236 wrote to memory of 2012	2236	taskeng.exe	33

C:\Users\Admin\AppData\Local\Temp\72cfa33b978294103889481feca472f2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\72cfa33b978294103889481feca472f2_JaffaCakes118.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:1584

C:\Windows\system32\taskeng.exe
taskeng.exe {BDB4309F-F2F4-479E-AF9F-D668A82F7F60} S-1-5-21-1385883288-3042840365-2734249351-1000:RPXOCQRF\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2236
- C:\ProgramData\xbdqf\skhejs.exe
  C:\ProgramData\xbdqf\skhejs.exe start2
  2⤵
  - Executes dropped EXE
  PID:2816
- C:\ProgramData\xbdqf\skhejs.exe
  C:\ProgramData\xbdqf\skhejs.exe start2
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2012

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\xbdqf\skhejs.exe

Filesize
222KB

MD5
72cfa33b978294103889481feca472f2

SHA1
0615eb31fd67345b9fa0d57d12a3bcb363152abe

SHA256
5d366decba2f9078f457cb35fe7bfd198760683a709f0d33745fc6e0ba59ac8a

SHA512
d1de5fee23b7a858ec62b849cd8a41cf896ab8b6df4836c65ba36942c1d1727b36832d45713a578c93e8a0b8650bf55923568637d91bb9b2196257a2ae015559

Download Submit
memory/1584-1-0x0000000000560000-0x0000000000660000-memory.dmp

Filesize
1024KB

Download
memory/1584-3-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/1584-2-0x0000000000220000-0x0000000000229000-memory.dmp

Filesize
36KB

Download
memory/1584-10-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/1584-13-0x0000000000560000-0x0000000000660000-memory.dmp

Filesize
1024KB

Download
memory/1584-14-0x0000000000220000-0x0000000000229000-memory.dmp

Filesize
36KB

Download
memory/1584-16-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/2012-29-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download
memory/2816-11-0x0000000000400000-0x00000000004C1000-memory.dmp

Filesize
772KB

Download