chinese_generic_botnet | a985a64aa7b6f5175e0f4e47b0eb41db10b2cb1236862f4610bcd09ead2fe663

Analysis

max time kernel
145s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
05-09-2022 10:53

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General

Target

tmp.exe
Size

362KB
MD5

af50ecd46089929f90385f6c90000c20
SHA1

9ae6f31c8f5b7f3b8c25d24bfe82c704b205beca
SHA256

a985a64aa7b6f5175e0f4e47b0eb41db10b2cb1236862f4610bcd09ead2fe663
SHA512

415a0a208b1ce87d2f43f4ff735afbc25ae4b6bfb683d39bca1ef8c6e81a07f9403182eebac912414da8fecef510375a8d4bb78b4934cd9dfcc3e53dc2a59259
SSDEEP

3072:N8jSZi34eTzl5IVp7Kw9ftm0dmNk7pzyEO05SVp14aJiwFXr:quZ5e65Q0djzKtawF7

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 2 IoCs

botnet

resource	yara_rule
behavioral2/memory/4344-136-0x0000000010000000-0x0000000010018000-memory.dmp	unk_chinese_botnet
behavioral2/memory/4856-145-0x0000000010000000-0x0000000010018000-memory.dmp	unk_chinese_botnet

Downloads MZ/PE file

Executes dropped EXE 3 IoCs

pid	Process
4692	computer.exe
4856	._cache_computer.exe
2576	Synaptics.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	tmp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	computer.exe

Adds Run key to start application 2 TTPs 3 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"	computer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Terms.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\tmp.exe"	tmp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Peahrfb.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\._cache_computer.exe"	._cache_computer.exe

Enumerates connected drives 3 TTPs 46 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)	\??\Q:	._cache_computer.exe
File opened (read-only)	\??\V:	._cache_computer.exe
File opened (read-only)	\??\J:	tmp.exe
File opened (read-only)	\??\S:	tmp.exe
File opened (read-only)	\??\V:	tmp.exe
File opened (read-only)	\??\Y:	tmp.exe
File opened (read-only)	\??\O:	._cache_computer.exe
File opened (read-only)	\??\E:	tmp.exe
File opened (read-only)	\??\R:	tmp.exe
File opened (read-only)	\??\H:	._cache_computer.exe
File opened (read-only)	\??\M:	._cache_computer.exe
File opened (read-only)	\??\P:	tmp.exe
File opened (read-only)	\??\W:	tmp.exe
File opened (read-only)	\??\N:	._cache_computer.exe
File opened (read-only)	\??\T:	._cache_computer.exe
File opened (read-only)	\??\Z:	tmp.exe
File opened (read-only)	\??\R:	._cache_computer.exe
File opened (read-only)	\??\S:	._cache_computer.exe
File opened (read-only)	\??\Y:	._cache_computer.exe
File opened (read-only)	\??\X:	tmp.exe
File opened (read-only)	\??\B:	._cache_computer.exe
File opened (read-only)	\??\E:	._cache_computer.exe
File opened (read-only)	\??\F:	tmp.exe
File opened (read-only)	\??\I:	tmp.exe
File opened (read-only)	\??\M:	tmp.exe
File opened (read-only)	\??\Q:	tmp.exe
File opened (read-only)	\??\T:	tmp.exe
File opened (read-only)	\??\G:	._cache_computer.exe
File opened (read-only)	\??\K:	._cache_computer.exe
File opened (read-only)	\??\P:	._cache_computer.exe
File opened (read-only)	\??\G:	tmp.exe
File opened (read-only)	\??\K:	tmp.exe
File opened (read-only)	\??\I:	._cache_computer.exe
File opened (read-only)	\??\J:	._cache_computer.exe
File opened (read-only)	\??\X:	._cache_computer.exe
File opened (read-only)	\??\Z:	._cache_computer.exe
File opened (read-only)	\??\N:	tmp.exe
File opened (read-only)	\??\U:	tmp.exe
File opened (read-only)	\??\F:	._cache_computer.exe
File opened (read-only)	\??\L:	._cache_computer.exe
File opened (read-only)	\??\U:	._cache_computer.exe
File opened (read-only)	\??\B:	tmp.exe
File opened (read-only)	\??\H:	tmp.exe
File opened (read-only)	\??\L:	tmp.exe
File opened (read-only)	\??\O:	tmp.exe
File opened (read-only)	\??\W:	._cache_computer.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 7 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
32	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4344	tmp.exe
4344	tmp.exe
4344	tmp.exe
4344	tmp.exe
4856	._cache_computer.exe
4856	._cache_computer.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
32	EXCEL.EXE
32	EXCEL.EXE
32	EXCEL.EXE
32	EXCEL.EXE
32	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4344 wrote to memory of 4832	4344	tmp.exe	85
PID 4344 wrote to memory of 4832	4344	tmp.exe	85
PID 4344 wrote to memory of 4832	4344	tmp.exe	85
PID 4344 wrote to memory of 4692	4344	tmp.exe	87
PID 4344 wrote to memory of 4692	4344	tmp.exe	87
PID 4344 wrote to memory of 4692	4344	tmp.exe	87
PID 4692 wrote to memory of 4856	4692	computer.exe	88
PID 4692 wrote to memory of 4856	4692	computer.exe	88
PID 4692 wrote to memory of 4856	4692	computer.exe	88
PID 4692 wrote to memory of 2576	4692	computer.exe	89
PID 4692 wrote to memory of 2576	4692	computer.exe	89
PID 4692 wrote to memory of 2576	4692	computer.exe	89

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Enumerates connected drives
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4344
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c md C:\windowss64
  2⤵
  PID:4832
- C:\windowss64\computer.exe
  "C:\windowss64\computer.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:4692
- - C:\Users\Admin\AppData\Local\Temp\._cache_computer.exe
    "C:\Users\Admin\AppData\Local\Temp\._cache_computer.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Enumerates connected drives
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    PID:4856
- - C:\ProgramData\Synaptics\Synaptics.exe
    "C:\ProgramData\Synaptics\Synaptics.exe" InjUpdate
    3⤵
    - Executes dropped EXE
    PID:2576

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:32

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

C:\ProgramData\Synaptics\Synaptics.exe

Filesize
754KB

MD5
310a7ff41f6633132e6c2bc25e51e567

SHA1
5f687df8cc3185ed68d77d0e05502c2eb308c5c8

SHA256
d1425edf482717cb64db2a36357866045b0c6306d919296591ffc9bc45d680ab

SHA512
ee9b3114cb37e52793bccdf20a27158f5def67ed9c7d8eb772e1deaf5d5f9a0030e847dea40bb320637f29508f1be2a49c3095460a6fd3afbc3bca196f642980

Download Submit
C:\ProgramData\Synaptics\Synaptics.exe

Filesize
754KB

MD5
310a7ff41f6633132e6c2bc25e51e567

SHA1
5f687df8cc3185ed68d77d0e05502c2eb308c5c8

SHA256
d1425edf482717cb64db2a36357866045b0c6306d919296591ffc9bc45d680ab

SHA512
ee9b3114cb37e52793bccdf20a27158f5def67ed9c7d8eb772e1deaf5d5f9a0030e847dea40bb320637f29508f1be2a49c3095460a6fd3afbc3bca196f642980

Download Submit
C:\Users\Admin\AppData\Local\Temp\._cache_computer.exe

Filesize
400KB

MD5
f82f50d6a61d3d73172fcbf3ff665e89

SHA1
2e5cde938a2822a13348e55f4ad0dfa75d545fee

SHA256
afbf8e478edc3d239953a3653a5ec113363fb9406552536d6469581b52585bcd

SHA512
f5945f9c5b4cfcd29498b24ec43000e6ec2927ec264d758aeeb4325f4c5f2b1d03fb997c84b38daec82b4a1dbc9f049b932ca399ef02778072cf594b1b5044fb

Download Submit
C:\Users\Admin\AppData\Local\Temp\._cache_computer.exe

Filesize
400KB

MD5
f82f50d6a61d3d73172fcbf3ff665e89

SHA1
2e5cde938a2822a13348e55f4ad0dfa75d545fee

SHA256
afbf8e478edc3d239953a3653a5ec113363fb9406552536d6469581b52585bcd

SHA512
f5945f9c5b4cfcd29498b24ec43000e6ec2927ec264d758aeeb4325f4c5f2b1d03fb997c84b38daec82b4a1dbc9f049b932ca399ef02778072cf594b1b5044fb

Download Submit
C:\Users\Admin\AppData\Local\Temp\qICyymDy.xlsm

Filesize
17KB

MD5
e566fc53051035e1e6fd0ed1823de0f9

SHA1
00bc96c48b98676ecd67e81a6f1d7754e4156044

SHA256
8e574b4ae6502230c0829e2319a6c146aebd51b7008bf5bbfb731424d7952c15

SHA512
a12f56ff30ea35381c2b8f8af2446cf1daa21ee872e98cad4b863db060acd4c33c5760918c277dadb7a490cb4ca2f925d59c70dc5171e16601a11bc4a6542b04

Download Submit
C:\windowss64\computer.exe

Filesize
1.1MB

MD5
d6df53506b123f5717463d0355336979

SHA1
7720fb4b89a4ebcef32a6d6a9a7a88c65cad2c14

SHA256
70969f1d56ec1ddcae3fc50545c0a351b798226c62d870db8ae5170eeec67694

SHA512
1bfefa221ed77ef05fc72fbc20a322cae990b2a33a9af47b9ee4d9fa1c09d5c81f6a8fd8496ed43a47ee2862e1e2bf1651b4cca2f5e9e23e491c3d4b3249ad2f

Download Submit
C:\windowss64\computer.exe

Filesize
1.1MB

MD5
d6df53506b123f5717463d0355336979

SHA1
7720fb4b89a4ebcef32a6d6a9a7a88c65cad2c14

SHA256
70969f1d56ec1ddcae3fc50545c0a351b798226c62d870db8ae5170eeec67694

SHA512
1bfefa221ed77ef05fc72fbc20a322cae990b2a33a9af47b9ee4d9fa1c09d5c81f6a8fd8496ed43a47ee2862e1e2bf1651b4cca2f5e9e23e491c3d4b3249ad2f

Download Submit
memory/32-151-0x00007FFA81510000-0x00007FFA81520000-memory.dmp

Filesize
64KB

Download
memory/32-148-0x00007FFA81510000-0x00007FFA81520000-memory.dmp

Filesize
64KB

Download
memory/32-149-0x00007FFA81510000-0x00007FFA81520000-memory.dmp

Filesize
64KB

Download
memory/32-150-0x00007FFA81510000-0x00007FFA81520000-memory.dmp

Filesize
64KB

Download
memory/32-152-0x00007FFA81510000-0x00007FFA81520000-memory.dmp

Filesize
64KB

Download
memory/32-153-0x00007FFA7F4B0000-0x00007FFA7F4C0000-memory.dmp

Filesize
64KB

Download
memory/32-154-0x00007FFA7F4B0000-0x00007FFA7F4C0000-memory.dmp

Filesize
64KB

Download
memory/4344-136-0x0000000010000000-0x0000000010018000-memory.dmp

Filesize
96KB

Download
memory/4856-145-0x0000000010000000-0x0000000010018000-memory.dmp

Filesize
96KB

Download