chinese_generic_botnet | d7c3bb09aa5e1d92564315ab491476d795850f7503dbad7e2835a87c7904d5b2

Analysis

max time kernel
178s
max time network
185s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2023 10:12

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General

Target

tmp.exe
Size

1.1MB
MD5

a4713efd7588cce07c4d82dda4efbfd3
SHA1

03c07219ef2846557937a1fcb6fdfa936c1610a0
SHA256

d7c3bb09aa5e1d92564315ab491476d795850f7503dbad7e2835a87c7904d5b2
SHA512

be6e8e17bcb3a3d3f5502c187f5488c8556760dbdabf0cfc9d1fd05bfa2b9328136ddc57c3867ae47530ac897d7e9dad9dea57615da27868cf657e0a5b64b530
SSDEEP

12288:VMSApJVYG5lDLyjsb0eOzkv4R7QnvUUilQ35+6G75V9lg5e6FqtNf:VnsJ39LyjbJkQFMhmC+6GD9+QX3

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

Processes:

resource	yara_rule
behavioral2/memory/2120-149-0x0000000010000000-0x0000000010018000-memory.dmp	unk_chinese_botnet
behavioral2/memory/1792-155-0x0000000010000000-0x0000000010018000-memory.dmp	unk_chinese_botnet

Downloads MZ/PE file

Checks computer location settings 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

computer.exetmp.exe._cache_tmp.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	computer.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	tmp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	._cache_tmp.exe

Executes dropped EXE 4 IoCs

Processes:

._cache_tmp.exeSynaptics.execomputer.exe._cache_computer.exe

pid process

2120 ._cache_tmp.exe
4376 Synaptics.exe
4516 computer.exe
1792 ._cache_computer.exe

pid	process
2120	._cache_tmp.exe
4376	Synaptics.exe
4516	computer.exe
1792	._cache_computer.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

._cache_computer.exetmp.exe._cache_tmp.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Imsossm.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\._cache_computer.exe"	._cache_computer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Synaptics Pointing Device Driver = "C:\\ProgramData\\Synaptics\\Synaptics.exe"	tmp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Uqimxqo.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\._cache_tmp.exe"	._cache_tmp.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

Processes:

._cache_computer.exe

description	ioc	process
File opened (read-only)	\??\K:	._cache_computer.exe
File opened (read-only)	\??\N:	._cache_computer.exe
File opened (read-only)	\??\O:	._cache_computer.exe
File opened (read-only)	\??\X:	._cache_computer.exe
File opened (read-only)	\??\E:	._cache_computer.exe
File opened (read-only)	\??\H:	._cache_computer.exe
File opened (read-only)	\??\J:	._cache_computer.exe
File opened (read-only)	\??\Y:	._cache_computer.exe
File opened (read-only)	\??\Z:	._cache_computer.exe
File opened (read-only)	\??\R:	._cache_computer.exe
File opened (read-only)	\??\S:	._cache_computer.exe
File opened (read-only)	\??\B:	._cache_computer.exe
File opened (read-only)	\??\F:	._cache_computer.exe
File opened (read-only)	\??\G:	._cache_computer.exe
File opened (read-only)	\??\I:	._cache_computer.exe
File opened (read-only)	\??\Q:	._cache_computer.exe
File opened (read-only)	\??\V:	._cache_computer.exe
File opened (read-only)	\??\W:	._cache_computer.exe
File opened (read-only)	\??\L:	._cache_computer.exe
File opened (read-only)	\??\M:	._cache_computer.exe
File opened (read-only)	\??\P:	._cache_computer.exe
File opened (read-only)	\??\T:	._cache_computer.exe
File opened (read-only)	\??\U:	._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 5 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

._cache_computer.exeEXCEL.EXE

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	._cache_computer.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

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

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 2 IoCs

Processes:

tmp.execomputer.exe

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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1388 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

._cache_computer.exe

pid process

1792 ._cache_computer.exe
1792 ._cache_computer.exe
Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

EXCEL.EXE

pid process

1388 EXCEL.EXE
1388 EXCEL.EXE
1388 EXCEL.EXE
1388 EXCEL.EXE

pid	process
1388	EXCEL.EXE

pid	process
1792	._cache_computer.exe
1792	._cache_computer.exe

pid	process
1388	EXCEL.EXE
1388	EXCEL.EXE
1388	EXCEL.EXE
1388	EXCEL.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

tmp.exe._cache_tmp.execomputer.exe

description	pid	process	target process
PID 4116 wrote to memory of 2120	4116	tmp.exe	._cache_tmp.exe
PID 4116 wrote to memory of 2120	4116	tmp.exe	._cache_tmp.exe
PID 4116 wrote to memory of 2120	4116	tmp.exe	._cache_tmp.exe
PID 2120 wrote to memory of 3228	2120	._cache_tmp.exe	cmd.exe
PID 2120 wrote to memory of 3228	2120	._cache_tmp.exe	cmd.exe
PID 2120 wrote to memory of 3228	2120	._cache_tmp.exe	cmd.exe
PID 4116 wrote to memory of 4376	4116	tmp.exe	Synaptics.exe
PID 4116 wrote to memory of 4376	4116	tmp.exe	Synaptics.exe
PID 4116 wrote to memory of 4376	4116	tmp.exe	Synaptics.exe
PID 2120 wrote to memory of 4516	2120	._cache_tmp.exe	computer.exe
PID 2120 wrote to memory of 4516	2120	._cache_tmp.exe	computer.exe
PID 2120 wrote to memory of 4516	2120	._cache_tmp.exe	computer.exe
PID 4516 wrote to memory of 1792	4516	computer.exe	._cache_computer.exe
PID 4516 wrote to memory of 1792	4516	computer.exe	._cache_computer.exe
PID 4516 wrote to memory of 1792	4516	computer.exe	._cache_computer.exe

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
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4116

C:\Users\Admin\AppData\Local\Temp\._cache_tmp.exe
"C:\Users\Admin\AppData\Local\Temp\._cache_tmp.exe"
2⤵
- Checks computer location settings
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2120

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c md C:\windowss64
3⤵
PID:3228

C:\windowss64\computer.exe
"C:\windowss64\computer.exe"
3⤵
- Checks computer location settings
- Executes dropped EXE
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4516

C:\Users\Admin\AppData\Local\Temp\._cache_computer.exe
"C:\Users\Admin\AppData\Local\Temp\._cache_computer.exe"
4⤵
- Executes dropped EXE
- Adds Run key to start application
- Enumerates connected drives
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:1792

C:\ProgramData\Synaptics\Synaptics.exe
"C:\ProgramData\Synaptics\Synaptics.exe" InjUpdate
2⤵
- Executes dropped EXE
PID:4376

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:1388

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Peripheral Device Discovery

T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\ProgramData\Synaptics\Synaptics.exe
Filesize
754KB

MD5
9053a0cbd2ae2350d9fa43468d6e96dd

SHA1
5c905ea1c7a6a52c3385dd68e11c45cfcc73cd63

SHA256
cc8f6c5a99dd8b667c8a32ff4f5aa2d3aee292b3a531493d74a65e3cbc12bf69

SHA512
3b1f01950bcd0e8973e47dee703f8e43046083c63abe9363ddbe973bb3f37a17829efae9a4ded360c1c40f65bcedaa9de14a4e3f1e487f8596ee8f53c54445c6

Download Submit
C:\ProgramData\Synaptics\Synaptics.exe
Filesize
754KB

MD5
9053a0cbd2ae2350d9fa43468d6e96dd

SHA1
5c905ea1c7a6a52c3385dd68e11c45cfcc73cd63

SHA256
cc8f6c5a99dd8b667c8a32ff4f5aa2d3aee292b3a531493d74a65e3cbc12bf69

SHA512
3b1f01950bcd0e8973e47dee703f8e43046083c63abe9363ddbe973bb3f37a17829efae9a4ded360c1c40f65bcedaa9de14a4e3f1e487f8596ee8f53c54445c6

Download Submit
C:\Users\Admin\AppData\Local\Temp\._cache_computer.exe
Filesize
400KB

MD5
20beeb0a82adcce3a58372804acc46be

SHA1
c579d9017d2c8298fe075ff5c05963901330e72a

SHA256
d1aaa7e7d31bf648c57f0c721d6f6ee2b17395b4e09d9d89a4f6dbd5dd706a8e

SHA512
7636912ba6323063cefb7fac5a6cff9e44a474e452a4d5d4f77ef88968266de184c68112e3667585e02e811781f51ee020e61ce820e3f9a38dcfdf30e6d522bd

Download Submit
C:\Users\Admin\AppData\Local\Temp\._cache_computer.exe
Filesize
400KB

MD5
20beeb0a82adcce3a58372804acc46be

SHA1
c579d9017d2c8298fe075ff5c05963901330e72a

SHA256
d1aaa7e7d31bf648c57f0c721d6f6ee2b17395b4e09d9d89a4f6dbd5dd706a8e

SHA512
7636912ba6323063cefb7fac5a6cff9e44a474e452a4d5d4f77ef88968266de184c68112e3667585e02e811781f51ee020e61ce820e3f9a38dcfdf30e6d522bd

Download Submit
C:\Users\Admin\AppData\Local\Temp\._cache_tmp.exe
Filesize
362KB

MD5
9552f895a4a0eb501fbac7763b26088f

SHA1
7f1361ea4bf392f84abe37f1c5e8845d1bf98c05

SHA256
845c91674475e84eab72a22e2c915083192fb3e00463d10ba231d720d0f15172

SHA512
f59cae315903bda0e2a9f116ccac494c63522436f8f9ea1268248f7c178b8ede4bf4f9a4db44835bad53fd3fb037f6e96a9ca486e5b71742072d403c0cb3146e

Download Submit
C:\Users\Admin\AppData\Local\Temp\._cache_tmp.exe
Filesize
362KB

MD5
9552f895a4a0eb501fbac7763b26088f

SHA1
7f1361ea4bf392f84abe37f1c5e8845d1bf98c05

SHA256
845c91674475e84eab72a22e2c915083192fb3e00463d10ba231d720d0f15172

SHA512
f59cae315903bda0e2a9f116ccac494c63522436f8f9ea1268248f7c178b8ede4bf4f9a4db44835bad53fd3fb037f6e96a9ca486e5b71742072d403c0cb3146e

Download Submit
C:\Users\Admin\AppData\Local\Temp\BtnrpBlu.xlsm
Filesize
17KB

MD5
e566fc53051035e1e6fd0ed1823de0f9

SHA1
00bc96c48b98676ecd67e81a6f1d7754e4156044

SHA256
8e574b4ae6502230c0829e2319a6c146aebd51b7008bf5bbfb731424d7952c15

SHA512
a12f56ff30ea35381c2b8f8af2446cf1daa21ee872e98cad4b863db060acd4c33c5760918c277dadb7a490cb4ca2f925d59c70dc5171e16601a11bc4a6542b04

Download Submit
C:\windowss64\computer.exe
Filesize
1.1MB

MD5
be689578752179e22bf915dbcf4f7520

SHA1
e798e703bfb90707a2872b51da73f32af566aedb

SHA256
de8c1aa37dd523e0699a10be71185f7a8ac1cde972d04107068f49250ef7317e

SHA512
89c95b387e566dfaf3f6a4ab60ee6e24d2574dd3802458e4d8f15e4c44136ac54c5b3a53addc1d28748656320050ee735fa2e8e5c57cdfb53fbdddc6eb586da8

Download Submit
C:\windowss64\computer.exe
Filesize
1.1MB

MD5
be689578752179e22bf915dbcf4f7520

SHA1
e798e703bfb90707a2872b51da73f32af566aedb

SHA256
de8c1aa37dd523e0699a10be71185f7a8ac1cde972d04107068f49250ef7317e

SHA512
89c95b387e566dfaf3f6a4ab60ee6e24d2574dd3802458e4d8f15e4c44136ac54c5b3a53addc1d28748656320050ee735fa2e8e5c57cdfb53fbdddc6eb586da8

Download Submit
memory/1388-139-0x00007FFB54410000-0x00007FFB54420000-memory.dmp

Filesize
64KB

Download
memory/1388-140-0x00007FFB54410000-0x00007FFB54420000-memory.dmp

Filesize
64KB

Download
memory/1388-143-0x00007FFB54410000-0x00007FFB54420000-memory.dmp

Filesize
64KB

Download
memory/1388-144-0x00007FFB51AB0000-0x00007FFB51AC0000-memory.dmp

Filesize
64KB

Download
memory/1388-145-0x00007FFB51AB0000-0x00007FFB51AC0000-memory.dmp

Filesize
64KB

Download
memory/1388-141-0x00007FFB54410000-0x00007FFB54420000-memory.dmp

Filesize
64KB

Download
memory/1388-142-0x00007FFB54410000-0x00007FFB54420000-memory.dmp

Filesize
64KB

Download
memory/1792-152-0x0000000000000000-mapping.dmp

Download
memory/1792-155-0x0000000010000000-0x0000000010018000-memory.dmp

Filesize
96KB

Download
memory/2120-149-0x0000000010000000-0x0000000010018000-memory.dmp

Filesize
96KB

Download
memory/2120-132-0x0000000000000000-mapping.dmp

Download
memory/3228-135-0x0000000000000000-mapping.dmp

Download
memory/4376-136-0x0000000000000000-mapping.dmp

Download
memory/4516-146-0x0000000000000000-mapping.dmp

Download