systembc | 145dbb397089105d6d06a861d62b48be9fd2527fb7d023b114cf05b723cd3858

Analysis

max time kernel
129s
max time network
140s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
29-08-2024 15:40

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General

Target

Cbmefxrmnv.exe
Size

2.0MB
MD5

170fb4fa36de83de39a9e228f17b0060
SHA1

4a9ee216442b6fc98152fe9e80e763d95caede6c
SHA256

145dbb397089105d6d06a861d62b48be9fd2527fb7d023b114cf05b723cd3858
SHA512

168f389ce7dd0a7feacf6505c1a52a6743900974dd11af86b2e07998817b2021f62dec0b00daffbc212fd51337500fa9ff1d669d708103de2337195db936ee8f
SSDEEP

24576:qM7wJrWiSgXXHgdjvYiKs7KHxGoz8oVWtnq4cPgv07ZNAqbJBO+kLQL3cOEKFHt:r7wJVSoFL3cYFH

Score

10^/10

systembc discovery persistence trojan

Malware Config

Extracted

Family

systembc

claywyaeropumps.com

185.43.220.45

Attributes

dns
5.132.191.104

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
Executes dropped EXE 5 IoCs

Processes:

gjob.exegjob.exegjob.exegjob.exegjob.exe

pid process

5856 gjob.exe
5584 gjob.exe
5668 gjob.exe
5916 gjob.exe
2896 gjob.exe

pid	process
5856	gjob.exe
5584	gjob.exe
5668	gjob.exe
5916	gjob.exe
2896	gjob.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

Cbmefxrmnv.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3450744190-3404161390-554719085-1000\Software\Microsoft\Windows\CurrentVersion\Run\VolumeInfo = "C:\\Users\\Admin\\AppData\\Roaming\\VolumeInfo.exe"	Cbmefxrmnv.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

Cbmefxrmnv.exegjob.exegjob.exe

description	pid	process	target process
PID 3056 set thread context of 5700	3056	Cbmefxrmnv.exe	Cbmefxrmnv.exe
PID 5856 set thread context of 5584	5856	gjob.exe	gjob.exe
PID 5856 set thread context of 5668	5856	gjob.exe	gjob.exe
PID 5916 set thread context of 2896	5916	gjob.exe	gjob.exe

Drops file in Windows directory 1 IoCs

Processes:

Cbmefxrmnv.exe

description ioc process

File created C:\Windows\Tasks\Test Task17.job Cbmefxrmnv.exe

description	ioc	process
File created	C:\Windows\Tasks\Test Task17.job	Cbmefxrmnv.exe

System Location Discovery: System Language Discovery 1 TTPs 6 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

Processes:

Cbmefxrmnv.exeCbmefxrmnv.exegjob.exegjob.exegjob.exegjob.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Cbmefxrmnv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Cbmefxrmnv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gjob.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gjob.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gjob.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gjob.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

gjob.exe

pid process

5856 gjob.exe
5856 gjob.exe

pid	process
5856	gjob.exe
5856	gjob.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

Cbmefxrmnv.exegjob.exegjob.exe

description	pid	process
Token: SeDebugPrivilege	3056	Cbmefxrmnv.exe
Token: SeDebugPrivilege	3056	Cbmefxrmnv.exe
Token: SeDebugPrivilege	5856	gjob.exe
Token: SeDebugPrivilege	5856	gjob.exe
Token: SeDebugPrivilege	5916	gjob.exe
Token: SeDebugPrivilege	5916	gjob.exe

Suspicious use of WriteProcessMemory 44 IoCs

Processes:

Cbmefxrmnv.exetaskeng.exegjob.exegjob.exe

description	pid	process	target process
PID 3056 wrote to memory of 5700	3056	Cbmefxrmnv.exe	Cbmefxrmnv.exe
PID 3056 wrote to memory of 5700	3056	Cbmefxrmnv.exe	Cbmefxrmnv.exe
PID 3056 wrote to memory of 5700	3056	Cbmefxrmnv.exe	Cbmefxrmnv.exe
PID 3056 wrote to memory of 5700	3056	Cbmefxrmnv.exe	Cbmefxrmnv.exe
PID 3056 wrote to memory of 5700	3056	Cbmefxrmnv.exe	Cbmefxrmnv.exe
PID 3056 wrote to memory of 5700	3056	Cbmefxrmnv.exe	Cbmefxrmnv.exe
PID 3056 wrote to memory of 5700	3056	Cbmefxrmnv.exe	Cbmefxrmnv.exe
PID 3056 wrote to memory of 5700	3056	Cbmefxrmnv.exe	Cbmefxrmnv.exe
PID 3056 wrote to memory of 5700	3056	Cbmefxrmnv.exe	Cbmefxrmnv.exe
PID 5820 wrote to memory of 5856	5820	taskeng.exe	gjob.exe
PID 5820 wrote to memory of 5856	5820	taskeng.exe	gjob.exe
PID 5820 wrote to memory of 5856	5820	taskeng.exe	gjob.exe
PID 5820 wrote to memory of 5856	5820	taskeng.exe	gjob.exe
PID 5856 wrote to memory of 5584	5856	gjob.exe	gjob.exe
PID 5856 wrote to memory of 5584	5856	gjob.exe	gjob.exe
PID 5856 wrote to memory of 5584	5856	gjob.exe	gjob.exe
PID 5856 wrote to memory of 5584	5856	gjob.exe	gjob.exe
PID 5856 wrote to memory of 5584	5856	gjob.exe	gjob.exe
PID 5856 wrote to memory of 5584	5856	gjob.exe	gjob.exe
PID 5856 wrote to memory of 5584	5856	gjob.exe	gjob.exe
PID 5856 wrote to memory of 5584	5856	gjob.exe	gjob.exe
PID 5856 wrote to memory of 5584	5856	gjob.exe	gjob.exe
PID 5856 wrote to memory of 5668	5856	gjob.exe	gjob.exe
PID 5856 wrote to memory of 5668	5856	gjob.exe	gjob.exe
PID 5856 wrote to memory of 5668	5856	gjob.exe	gjob.exe
PID 5856 wrote to memory of 5668	5856	gjob.exe	gjob.exe
PID 5856 wrote to memory of 5668	5856	gjob.exe	gjob.exe
PID 5856 wrote to memory of 5668	5856	gjob.exe	gjob.exe
PID 5856 wrote to memory of 5668	5856	gjob.exe	gjob.exe
PID 5856 wrote to memory of 5668	5856	gjob.exe	gjob.exe
PID 5856 wrote to memory of 5668	5856	gjob.exe	gjob.exe
PID 5820 wrote to memory of 5916	5820	taskeng.exe	gjob.exe
PID 5820 wrote to memory of 5916	5820	taskeng.exe	gjob.exe
PID 5820 wrote to memory of 5916	5820	taskeng.exe	gjob.exe
PID 5820 wrote to memory of 5916	5820	taskeng.exe	gjob.exe
PID 5916 wrote to memory of 2896	5916	gjob.exe	gjob.exe
PID 5916 wrote to memory of 2896	5916	gjob.exe	gjob.exe
PID 5916 wrote to memory of 2896	5916	gjob.exe	gjob.exe
PID 5916 wrote to memory of 2896	5916	gjob.exe	gjob.exe
PID 5916 wrote to memory of 2896	5916	gjob.exe	gjob.exe
PID 5916 wrote to memory of 2896	5916	gjob.exe	gjob.exe
PID 5916 wrote to memory of 2896	5916	gjob.exe	gjob.exe
PID 5916 wrote to memory of 2896	5916	gjob.exe	gjob.exe
PID 5916 wrote to memory of 2896	5916	gjob.exe	gjob.exe

C:\Users\Admin\AppData\Local\Temp\Cbmefxrmnv.exe
"C:\Users\Admin\AppData\Local\Temp\Cbmefxrmnv.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3056
- C:\Users\Admin\AppData\Local\Temp\Cbmefxrmnv.exe
  "C:\Users\Admin\AppData\Local\Temp\Cbmefxrmnv.exe"
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  PID:5700

C:\Windows\system32\taskeng.exe
taskeng.exe {B33076F5-452A-4302-AD9F-A7EA1124E9A0} S-1-5-21-3450744190-3404161390-554719085-1000:PDIZKVQX\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:5820
- C:\ProgramData\pbma\gjob.exe
  C:\ProgramData\pbma\gjob.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5856
- - C:\ProgramData\pbma\gjob.exe
    "C:\ProgramData\pbma\gjob.exe"
    3⤵
    - Executes dropped EXE
    PID:5584
- - C:\ProgramData\pbma\gjob.exe
    "C:\ProgramData\pbma\gjob.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:5668
- C:\ProgramData\pbma\gjob.exe
  C:\ProgramData\pbma\gjob.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5916
- - C:\ProgramData\pbma\gjob.exe
    "C:\ProgramData\pbma\gjob.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2896

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\pbma\gjob.exe

Filesize
2.0MB

MD5
170fb4fa36de83de39a9e228f17b0060

SHA1
4a9ee216442b6fc98152fe9e80e763d95caede6c

SHA256
145dbb397089105d6d06a861d62b48be9fd2527fb7d023b114cf05b723cd3858

SHA512
168f389ce7dd0a7feacf6505c1a52a6743900974dd11af86b2e07998817b2021f62dec0b00daffbc212fd51337500fa9ff1d669d708103de2337195db936ee8f

Download Submit
C:\Windows\Tasks\Test Task17.job

Filesize
212B

MD5
52b10d8474e4d0d75fbd6a91b5fbc053

SHA1
babbcadccbf0c94a9fe0b3f15f2c49a39c76ddd0

SHA256
9ef40b23dc494303ef86e5251e44ebc6a09ae39ec1bb09fb6a2438d2467ed724

SHA512
b7f5186c3246ede17d8cd6f6edb9664bc9e7d88792ba102e6f0f1d2454f5ebb5a318334d64fe648b87efe8cf92dd8f2c86136112676a9a9106e7e3e51d6708ce

Download Submit
memory/3056-0-0x0000000073EEE000-0x0000000073EEF000-memory.dmp

Filesize
4KB

Download
memory/3056-1-0x0000000001190000-0x00000000013A2000-memory.dmp

Filesize
2.1MB

Download
memory/3056-2-0x0000000004D10000-0x0000000004DE6000-memory.dmp

Filesize
856KB

Download
memory/3056-3-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-4-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-22-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-6-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-8-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-14-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-18-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-32-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-38-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-36-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-34-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-30-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-28-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-26-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-24-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-20-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-16-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-12-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-10-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-40-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-44-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-48-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-50-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-56-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-54-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-52-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-46-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-42-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-66-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-58-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-60-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-64-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-62-0x0000000004D10000-0x0000000004DE1000-memory.dmp

Filesize
836KB

Download
memory/3056-1039-0x0000000073EE0000-0x00000000745CE000-memory.dmp

Filesize
6.9MB

Download
memory/3056-1040-0x0000000073EE0000-0x00000000745CE000-memory.dmp

Filesize
6.9MB

Download
memory/3056-1041-0x0000000000A40000-0x0000000000A98000-memory.dmp

Filesize
352KB

Download
memory/3056-1042-0x0000000000D70000-0x0000000000DBC000-memory.dmp

Filesize
304KB

Download
memory/3056-1043-0x0000000073EEE000-0x0000000073EEF000-memory.dmp

Filesize
4KB

Download
memory/3056-1044-0x0000000073EE0000-0x00000000745CE000-memory.dmp

Filesize
6.9MB

Download
memory/3056-1045-0x0000000000E80000-0x0000000000ED4000-memory.dmp

Filesize
336KB

Download
memory/3056-1061-0x0000000073EE0000-0x00000000745CE000-memory.dmp

Filesize
6.9MB

Download
memory/5700-1058-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download
memory/5856-1064-0x0000000073E9E000-0x0000000073E9F000-memory.dmp

Filesize
4KB

Download
memory/5856-1065-0x0000000000180000-0x0000000000392000-memory.dmp

Filesize
2.1MB

Download
memory/5856-2102-0x0000000073E90000-0x000000007457E000-memory.dmp

Filesize
6.9MB

Download
memory/5856-2103-0x0000000073E9E000-0x0000000073E9F000-memory.dmp

Filesize
4KB

Download
memory/5856-2104-0x0000000073E90000-0x000000007457E000-memory.dmp

Filesize
6.9MB

Download
memory/5856-2131-0x0000000073E90000-0x000000007457E000-memory.dmp

Filesize
6.9MB

Download
memory/5916-2135-0x0000000000180000-0x0000000000392000-memory.dmp

Filesize
2.1MB

Download