chinese_generic_botnet | b4d51b0354e7508d723396fa6affd92b5108fa3cd27ecd4c86001a5ffb999cb8

General

Target

b4d51b0354e7508d723396fa6affd92b5108fa3cd27ecd4c86001a5ffb999cb8.exe
Size

1.8MB
MD5

108fde1527d48fabd718d3b25d58ce40
SHA1

fdd49fafb3fc40b700204f60d754143468762f4d
SHA256

b4d51b0354e7508d723396fa6affd92b5108fa3cd27ecd4c86001a5ffb999cb8
SHA512

140a12f14e3733a4a2989dccf645033e628684bcd4c56e63c7d2d22ed2893ce71e986e6c1ef04fde121125dbed128d48245d121980ac0bceb2fe7fdc809e6e04
SSDEEP

12288:uvTIiUxmYh90jjAblb1yHy8ZV0Lug6BtPtzFS30pS6zxgIsxITrLpyPYCSXh1M2p:ubIiCm898jGyS8RY3VSdsxIPL1/xUU

Score

10^/10

chinese_generic_botnet botnet persistence

Malware Config

Signatures

Generic Chinese Botnet
A botnet originating from China which is currently unnamed publicly.
botnet chinese_generic_botnet

Chinese Botnet payload 1 IoCs

botnet

resource	yara_rule
behavioral2/memory/4796-4-0x0000000010000000-0x0000000010018000-memory.dmp	unk_chinese_botnet

Executes dropped EXE 1 IoCs

pid	Process
4796	Server.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3125601242-331447593-1512828465-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rotzeac.exe = "C:\\Windows\\SysWOW64\\Server.exe"	Server.exe

Enumerates connected drives 3 TTPs 22 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\E:	Server.exe
File opened (read-only)	\??\H:	Server.exe
File opened (read-only)	\??\L:	Server.exe
File opened (read-only)	\??\M:	Server.exe
File opened (read-only)	\??\N:	Server.exe
File opened (read-only)	\??\R:	Server.exe
File opened (read-only)	\??\S:	Server.exe
File opened (read-only)	\??\G:	Server.exe
File opened (read-only)	\??\O:	Server.exe
File opened (read-only)	\??\Q:	Server.exe
File opened (read-only)	\??\T:	Server.exe
File opened (read-only)	\??\V:	Server.exe
File opened (read-only)	\??\I:	Server.exe
File opened (read-only)	\??\J:	Server.exe
File opened (read-only)	\??\W:	Server.exe
File opened (read-only)	\??\X:	Server.exe
File opened (read-only)	\??\Y:	Server.exe
File opened (read-only)	\??\B:	Server.exe
File opened (read-only)	\??\K:	Server.exe
File opened (read-only)	\??\P:	Server.exe
File opened (read-only)	\??\U:	Server.exe
File opened (read-only)	\??\Z:	Server.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Server.exe	b4d51b0354e7508d723396fa6affd92b5108fa3cd27ecd4c86001a5ffb999cb8.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	Server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	Server.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4796	Server.exe
4796	Server.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
3528	b4d51b0354e7508d723396fa6affd92b5108fa3cd27ecd4c86001a5ffb999cb8.exe
3528	b4d51b0354e7508d723396fa6affd92b5108fa3cd27ecd4c86001a5ffb999cb8.exe
4796	Server.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3528 wrote to memory of 4796	3528	b4d51b0354e7508d723396fa6affd92b5108fa3cd27ecd4c86001a5ffb999cb8.exe	90
PID 3528 wrote to memory of 4796	3528	b4d51b0354e7508d723396fa6affd92b5108fa3cd27ecd4c86001a5ffb999cb8.exe	90
PID 3528 wrote to memory of 4796	3528	b4d51b0354e7508d723396fa6affd92b5108fa3cd27ecd4c86001a5ffb999cb8.exe	90

C:\Users\Admin\AppData\Local\Temp\b4d51b0354e7508d723396fa6affd92b5108fa3cd27ecd4c86001a5ffb999cb8.exe
"C:\Users\Admin\AppData\Local\Temp\b4d51b0354e7508d723396fa6affd92b5108fa3cd27ecd4c86001a5ffb999cb8.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3528
- C:\Windows\SysWOW64\Server.exe
  C:\Windows\system32\\Server.exe
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Enumerates connected drives
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:4796

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\Server.exe

Filesize
1.0MB

MD5
b1b90cec4501087e97426d83c01bbd1f

SHA1
444dae63f2a182366fb40060bd91f174dd33424b

SHA256
6d42ce925574750c88aff2d8e3b4cb0d500ef23d520706f82ed913eba9c466fe

SHA512
806f1956cb05db1ab8f2d35223c961919cc5d7ce4d63aef1dad1f9d51927b3a7e6022b1df52c6f8bcbf595d3df0134ce6101f3b557c716934ad0f91dafcece81

Download Submit
C:\Windows\SysWOW64\Server.exe

Filesize
1.0MB

MD5
b1b90cec4501087e97426d83c01bbd1f

SHA1
444dae63f2a182366fb40060bd91f174dd33424b

SHA256
6d42ce925574750c88aff2d8e3b4cb0d500ef23d520706f82ed913eba9c466fe

SHA512
806f1956cb05db1ab8f2d35223c961919cc5d7ce4d63aef1dad1f9d51927b3a7e6022b1df52c6f8bcbf595d3df0134ce6101f3b557c716934ad0f91dafcece81

Download Submit
memory/4796-4-0x0000000010000000-0x0000000010018000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads