chinese_generic_botnet | 8e4856e97753bf0e0c73b10d7d7891968e347b73dd2b506e6308d7bca7af0dd0

General

Target

PYS.exe
Size

3.4MB
MD5

3651d9ca9d9a43985750f0de73f0c807
SHA1

15810e62673e4625b4c8c61ad37f4b48a4760f55
SHA256

8e4856e97753bf0e0c73b10d7d7891968e347b73dd2b506e6308d7bca7af0dd0
SHA512

23f604c116eea0d4212740594eefe0b044d6e088fad17bbc073c97923e31cb28b53a570a375adf012dbb7f797827595e48bf9a781913f4c08ae0125e0d0a5e05
SSDEEP

98304:Ps+xhKoQJBwKhJ+O+uiXAqSuuWHoFN6WtljaEy9oFLOAkGkzdnEVomFHKnP:5oJpQAqSudHmN6WtljaEyqFLOyomFHKP

Score

10^/10

chinese_generic_botnet botnet

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/1152-133-0x0000000001340000-0x0000000001366000-memory.dmp	unk_chinese_botnet
behavioral2/memory/1152-134-0x0000000010000000-0x0000000010027000-memory.dmp	unk_chinese_botnet

Downloads MZ/PE file
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

Processes:

PYS.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation PYS.exe
Executes dropped EXE 1 IoCs

Processes:

Windowsfig.exe

pid process

4668 Windowsfig.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

816 4668 WerFault.exe Windowsfig.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

Windowsfig.exe

pid process

4668 Windowsfig.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Windowsfig.exe

description pid process

Token: SeDebugPrivilege 4668 Windowsfig.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation	PYS.exe

pid	process
4668	Windowsfig.exe

pid	pid_target	process	target process
816	4668	WerFault.exe	Windowsfig.exe

pid	process
4668	Windowsfig.exe

description	pid	process
Token: SeDebugPrivilege	4668	Windowsfig.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

PYS.exe

description	pid	process	target process
PID 1152 wrote to memory of 4668	1152	PYS.exe	Windowsfig.exe
PID 1152 wrote to memory of 4668	1152	PYS.exe	Windowsfig.exe
PID 1152 wrote to memory of 4668	1152	PYS.exe	Windowsfig.exe
PID 1152 wrote to memory of 3904	1152	PYS.exe	cmd.exe
PID 1152 wrote to memory of 3904	1152	PYS.exe	cmd.exe
PID 1152 wrote to memory of 3904	1152	PYS.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\PYS.exe
"C:\Users\Admin\AppData\Local\Temp\PYS.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1152

C:\ProgramData\Windowsfig.exe
"C:\ProgramData\Windowsfig.exe"
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4668

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4668 -s 2580
3⤵
- Program crash
PID:816

C:\Windows\SysWOW64\cmd.exe
cmd /C "del /F /S /Q /A C:\ProgramData\Windowsfig.exe"
2⤵
PID:3904

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4668 -ip 4668
1⤵
PID:4048

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\ProgramData\Windowsfig.exe
Filesize
108KB

MD5
40528a8ce542af784cb9958552f7798d

SHA1
58c5ba782f367a1d65bf712ada150fe0b5e14292

SHA256
46780be1f3276ff325e105b85d5cac13b1eae75b04d17340bca01c7d63027cfc

SHA512
dad82f72882e2a7ca2fe4cea7360150bdffe394dca582f7afdc378ff6e77578e3dd12da668bf2297532b3d2475d97838571cca6343c4a7515d26449acf287e0a

Download Submit
C:\ProgramData\Windowsfig.exe
Filesize
108KB

MD5
40528a8ce542af784cb9958552f7798d

SHA1
58c5ba782f367a1d65bf712ada150fe0b5e14292

SHA256
46780be1f3276ff325e105b85d5cac13b1eae75b04d17340bca01c7d63027cfc

SHA512
dad82f72882e2a7ca2fe4cea7360150bdffe394dca582f7afdc378ff6e77578e3dd12da668bf2297532b3d2475d97838571cca6343c4a7515d26449acf287e0a

Download Submit
C:\ProgramData\Windowsfig.exe
Filesize
108KB

MD5
40528a8ce542af784cb9958552f7798d

SHA1
58c5ba782f367a1d65bf712ada150fe0b5e14292

SHA256
46780be1f3276ff325e105b85d5cac13b1eae75b04d17340bca01c7d63027cfc

SHA512
dad82f72882e2a7ca2fe4cea7360150bdffe394dca582f7afdc378ff6e77578e3dd12da668bf2297532b3d2475d97838571cca6343c4a7515d26449acf287e0a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_actq3gam.s1w.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1152-134-0x0000000010000000-0x0000000010027000-memory.dmp

Filesize
156KB

Download
memory/1152-133-0x0000000001340000-0x0000000001366000-memory.dmp

Filesize
152KB

Download
memory/4668-178-0x0000000006880000-0x00000000068B6000-memory.dmp

Filesize
216KB

Download
memory/4668-183-0x0000000007D10000-0x00000000082B4000-memory.dmp

Filesize
5.6MB

Download
memory/4668-166-0x0000000008EC0000-0x00000000094E8000-memory.dmp

Filesize
6.2MB

Download
memory/4668-177-0x0000000006820000-0x000000000683A000-memory.dmp

Filesize
104KB

Download
memory/4668-165-0x00000000007C0000-0x00000000007E0000-memory.dmp

Filesize
128KB

Download
memory/4668-179-0x0000000007690000-0x0000000007D0A000-memory.dmp

Filesize
6.5MB

Download
memory/4668-180-0x0000000006960000-0x00000000069F6000-memory.dmp

Filesize
600KB

Download
memory/4668-181-0x0000000006910000-0x0000000006932000-memory.dmp

Filesize
136KB

Download
memory/4668-182-0x0000000006A70000-0x0000000006AD6000-memory.dmp

Filesize
408KB

Download
memory/4668-167-0x0000000005300000-0x0000000005310000-memory.dmp

Filesize
64KB

Download
memory/4668-184-0x0000000006A40000-0x0000000006A5E000-memory.dmp

Filesize
120KB

Download
memory/4668-185-0x0000000006B30000-0x0000000006B7A000-memory.dmp

Filesize
296KB

Download
memory/4668-186-0x00000000082C0000-0x0000000008326000-memory.dmp

Filesize
408KB

Download
memory/4668-187-0x0000000008330000-0x0000000008352000-memory.dmp

Filesize
136KB

Download
memory/4668-197-0x0000000005670000-0x000000000568E000-memory.dmp

Filesize
120KB

Download
memory/4668-198-0x00000000FF6D0000-0x00000000FF6E0000-memory.dmp

Filesize
64KB

Download
memory/4668-199-0x0000000005B20000-0x0000000005B2A000-memory.dmp

Filesize
40KB

Download

Analysis

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