chinese_generic_botnet | 70969f1d56ec1ddcae3fc50545c0a351b798226c62d870db8ae5170eeec67694

Analysis

max time kernel
143s
max time network
162s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
07/05/2022, 04:07

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General

Target
exploror.exe
Size 1.1MB
Sample220507-ep1s1adhdp
SHA256 70969f1d56ec1ddcae3fc50545c0a351b798226c62d870db8ae5170eeec67694
MD5 d6df53506b123f5717463d0355336979
SHA1 7720fb4b89a4ebcef32a6d6a9a7a88c65cad2c14
SHA512 1bfefa221ed77ef05fc72fbc20a322cae990b2a33a9af47b9ee4d9fa1c09d5c81f6a8fd8496ed43a47ee2862e1e2bf1651b4cca2f5e9e23e491c3d4b3249ad2f
MD5 SHA1 SHA512

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/4888-133-0x0000000010000000-0x0000000010018000-memory.dmp	unk_chinese_botnet

Executes dropped EXE 2 IoCs

pid	Process
4888	._cache_exploror.exe
3660	Synaptics.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	exploror.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Synaptics Pointing Device Driver = "C:\\ProgramData\\Synaptics\\Synaptics.exe"	exploror.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Peahrfb.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\._cache_exploror.exe"	._cache_exploror.exe

Enumerates connected drives 3 TTPs 23 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)	\??\R:	._cache_exploror.exe
File opened (read-only)	\??\Y:	._cache_exploror.exe
File opened (read-only)	\??\G:	._cache_exploror.exe
File opened (read-only)	\??\K:	._cache_exploror.exe
File opened (read-only)	\??\T:	._cache_exploror.exe
File opened (read-only)	\??\X:	._cache_exploror.exe
File opened (read-only)	\??\W:	._cache_exploror.exe
File opened (read-only)	\??\Z:	._cache_exploror.exe
File opened (read-only)	\??\F:	._cache_exploror.exe
File opened (read-only)	\??\J:	._cache_exploror.exe
File opened (read-only)	\??\O:	._cache_exploror.exe
File opened (read-only)	\??\P:	._cache_exploror.exe
File opened (read-only)	\??\Q:	._cache_exploror.exe
File opened (read-only)	\??\M:	._cache_exploror.exe
File opened (read-only)	\??\N:	._cache_exploror.exe
File opened (read-only)	\??\S:	._cache_exploror.exe
File opened (read-only)	\??\B:	._cache_exploror.exe
File opened (read-only)	\??\E:	._cache_exploror.exe
File opened (read-only)	\??\H:	._cache_exploror.exe
File opened (read-only)	\??\I:	._cache_exploror.exe
File opened (read-only)	\??\L:	._cache_exploror.exe
File opened (read-only)	\??\U:	._cache_exploror.exe
File opened (read-only)	\??\V:	._cache_exploror.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 5 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	._cache_exploror.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	._cache_exploror.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	exploror.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2936	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4888	._cache_exploror.exe
4888	._cache_exploror.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
2936	EXCEL.EXE
2936	EXCEL.EXE
2936	EXCEL.EXE
2936	EXCEL.EXE
2936	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 916 wrote to memory of 4888	916	exploror.exe	80
PID 916 wrote to memory of 4888	916	exploror.exe	80
PID 916 wrote to memory of 4888	916	exploror.exe	80
PID 916 wrote to memory of 3660	916	exploror.exe	81
PID 916 wrote to memory of 3660	916	exploror.exe	81
PID 916 wrote to memory of 3660	916	exploror.exe	81

C:\Users\Admin\AppData\Local\Temp\exploror.exe
"C:\Users\Admin\AppData\Local\Temp\exploror.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:916
- C:\Users\Admin\AppData\Local\Temp\._cache_exploror.exe
  "C:\Users\Admin\AppData\Local\Temp\._cache_exploror.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Enumerates connected drives
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4888
- C:\ProgramData\Synaptics\Synaptics.exe
  "C:\ProgramData\Synaptics\Synaptics.exe" InjUpdate
  2⤵
  - Executes dropped EXE
  PID:3660

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" /automation -Embedding
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2936

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Synaptics.exe

Path C:\ProgramData\Synaptics\Synaptics.exe
Size 754KB
SHA256 d1425edf482717cb64db2a36357866045b0c6306d919296591ffc9bc45d680ab
MD5 310a7ff41f6633132e6c2bc25e51e567
SHA1 5f687df8cc3185ed68d77d0e05502c2eb308c5c8
SHA512 ee9b3114cb37e52793bccdf20a27158f5def67ed9c7d8eb772e1deaf5d5f9a0030e847dea40bb320637f29508f1be2a49c3095460a6fd3afbc3bca196f642980
SSDEEP 12288:KMSApJVYG5lDLyjsb0eOzkv4R7QnvUUilQ35+6G75V9tT3:KnsJ39LyjbJkQFMhmC+6GD9l
MD5 SHA1 SHA512 SSDEEP

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Synaptics.exe

Path C:\ProgramData\Synaptics\Synaptics.exe
Size 754KB
SHA256 d1425edf482717cb64db2a36357866045b0c6306d919296591ffc9bc45d680ab
MD5 310a7ff41f6633132e6c2bc25e51e567
SHA1 5f687df8cc3185ed68d77d0e05502c2eb308c5c8
SHA512 ee9b3114cb37e52793bccdf20a27158f5def67ed9c7d8eb772e1deaf5d5f9a0030e847dea40bb320637f29508f1be2a49c3095460a6fd3afbc3bca196f642980
SSDEEP 12288:KMSApJVYG5lDLyjsb0eOzkv4R7QnvUUilQ35+6G75V9tT3:KnsJ39LyjbJkQFMhmC+6GD9l
MD5 SHA1 SHA512 SSDEEP

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._cache_exploror.exe

Path C:\Users\Admin\AppData\Local\Temp\._cache_exploror.exe
Size 400KB
SHA256 afbf8e478edc3d239953a3653a5ec113363fb9406552536d6469581b52585bcd
MD5 f82f50d6a61d3d73172fcbf3ff665e89
SHA1 2e5cde938a2822a13348e55f4ad0dfa75d545fee
SHA512 f5945f9c5b4cfcd29498b24ec43000e6ec2927ec264d758aeeb4325f4c5f2b1d03fb997c84b38daec82b4a1dbc9f049b932ca399ef02778072cf594b1b5044fb
SSDEEP 3072:sAAdrt/RP3DX9hNujlPQb6nrIKOE7EHbH0hLNZ:ulRP3pzW1y6nr31kUTZ
MD5 SHA1 SHA512 SSDEEP

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._cache_exploror.exe

Path C:\Users\Admin\AppData\Local\Temp\._cache_exploror.exe
Size 400KB
SHA256 afbf8e478edc3d239953a3653a5ec113363fb9406552536d6469581b52585bcd
MD5 f82f50d6a61d3d73172fcbf3ff665e89
SHA1 2e5cde938a2822a13348e55f4ad0dfa75d545fee
SHA512 f5945f9c5b4cfcd29498b24ec43000e6ec2927ec264d758aeeb4325f4c5f2b1d03fb997c84b38daec82b4a1dbc9f049b932ca399ef02778072cf594b1b5044fb
SSDEEP 3072:sAAdrt/RP3DX9hNujlPQb6nrIKOE7EHbH0hLNZ:ulRP3pzW1y6nr31kUTZ
MD5 SHA1 SHA512 SSDEEP

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mFZdNsoj.xlsm

Path C:\Users\Admin\AppData\Local\Temp\mFZdNsoj.xlsm
Size 17KB
SHA256 8e574b4ae6502230c0829e2319a6c146aebd51b7008bf5bbfb731424d7952c15
MD5 e566fc53051035e1e6fd0ed1823de0f9
SHA1 00bc96c48b98676ecd67e81a6f1d7754e4156044
SHA512 a12f56ff30ea35381c2b8f8af2446cf1daa21ee872e98cad4b863db060acd4c33c5760918c277dadb7a490cb4ca2f925d59c70dc5171e16601a11bc4a6542b04
SSDEEP 384:oUaZLPzMfVSa1VvYXmrsdPkLmDAx7r/l0:oUatwNSSvY2IdsHr/y
MD5 SHA1 SHA512 SSDEEP

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memory/2936-141-0x00007FFF77E70000-0x00007FFF77E80000-memory.dmp

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memory/2936-139-0x00007FFF77E70000-0x00007FFF77E80000-memory.dmp

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memory/2936-140-0x00007FFF77E70000-0x00007FFF77E80000-memory.dmp

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memory/2936-142-0x00007FFF77E70000-0x00007FFF77E80000-memory.dmp

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memory/2936-143-0x00007FFF77E70000-0x00007FFF77E80000-memory.dmp

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memory/2936-144-0x00007FFF75DE0000-0x00007FFF75DF0000-memory.dmp

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memory/2936-145-0x00007FFF75DE0000-0x00007FFF75DF0000-memory.dmp

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memory/4888-133-0x0000000010000000-0x0000000010018000-memory.dmp

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