Analysis
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max time kernel
149s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system -
submitted
17-04-2023 05:59
Static task
static1
Behavioral task
behavioral1
Sample
tmp.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
tmp.exe
Resource
win10v2004-20230220-en
General
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Target
tmp.exe
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Size
3.4MB
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MD5
3651d9ca9d9a43985750f0de73f0c807
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SHA1
15810e62673e4625b4c8c61ad37f4b48a4760f55
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SHA256
8e4856e97753bf0e0c73b10d7d7891968e347b73dd2b506e6308d7bca7af0dd0
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SHA512
23f604c116eea0d4212740594eefe0b044d6e088fad17bbc073c97923e31cb28b53a570a375adf012dbb7f797827595e48bf9a781913f4c08ae0125e0d0a5e05
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SSDEEP
98304:Ps+xhKoQJBwKhJ+O+uiXAqSuuWHoFN6WtljaEy9oFLOAkGkzdnEVomFHKnP:5oJpQAqSudHmN6WtljaEyqFLOyomFHKP
Malware Config
Signatures
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Generic Chinese Botnet
A botnet originating from China which is currently unnamed publicly.
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Chinese Botnet payload 2 IoCs
Processes:
resource yara_rule behavioral2/memory/408-133-0x0000000002990000-0x00000000029B6000-memory.dmp unk_chinese_botnet behavioral2/memory/408-134-0x0000000010000000-0x0000000010027000-memory.dmp unk_chinese_botnet -
Downloads MZ/PE file
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
tmp.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation tmp.exe -
Executes dropped EXE 1 IoCs
Processes:
Windowsfig.exepid process 3804 Windowsfig.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 1816 3804 WerFault.exe Windowsfig.exe -
Suspicious behavior: EnumeratesProcesses 1 IoCs
Processes:
Windowsfig.exepid process 3804 Windowsfig.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
Windowsfig.exedescription pid process Token: SeDebugPrivilege 3804 Windowsfig.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
tmp.exedescription pid process target process PID 408 wrote to memory of 3804 408 tmp.exe Windowsfig.exe PID 408 wrote to memory of 3804 408 tmp.exe Windowsfig.exe PID 408 wrote to memory of 3804 408 tmp.exe Windowsfig.exe PID 408 wrote to memory of 840 408 tmp.exe cmd.exe PID 408 wrote to memory of 840 408 tmp.exe cmd.exe PID 408 wrote to memory of 840 408 tmp.exe cmd.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmp.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\ProgramData\Windowsfig.exe"C:\ProgramData\Windowsfig.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3804 -s 24683⤵
- Program crash
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C:\Windows\SysWOW64\cmd.execmd /C "del /F /S /Q /A C:\ProgramData\Windowsfig.exe"2⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3804 -ip 38041⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\ProgramData\Windowsfig.exeFilesize
108KB
MD540528a8ce542af784cb9958552f7798d
SHA158c5ba782f367a1d65bf712ada150fe0b5e14292
SHA25646780be1f3276ff325e105b85d5cac13b1eae75b04d17340bca01c7d63027cfc
SHA512dad82f72882e2a7ca2fe4cea7360150bdffe394dca582f7afdc378ff6e77578e3dd12da668bf2297532b3d2475d97838571cca6343c4a7515d26449acf287e0a
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C:\ProgramData\Windowsfig.exeFilesize
108KB
MD540528a8ce542af784cb9958552f7798d
SHA158c5ba782f367a1d65bf712ada150fe0b5e14292
SHA25646780be1f3276ff325e105b85d5cac13b1eae75b04d17340bca01c7d63027cfc
SHA512dad82f72882e2a7ca2fe4cea7360150bdffe394dca582f7afdc378ff6e77578e3dd12da668bf2297532b3d2475d97838571cca6343c4a7515d26449acf287e0a
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C:\ProgramData\Windowsfig.exeFilesize
108KB
MD540528a8ce542af784cb9958552f7798d
SHA158c5ba782f367a1d65bf712ada150fe0b5e14292
SHA25646780be1f3276ff325e105b85d5cac13b1eae75b04d17340bca01c7d63027cfc
SHA512dad82f72882e2a7ca2fe4cea7360150bdffe394dca582f7afdc378ff6e77578e3dd12da668bf2297532b3d2475d97838571cca6343c4a7515d26449acf287e0a
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C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pycavkfa.2qy.ps1Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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memory/408-134-0x0000000010000000-0x0000000010027000-memory.dmpFilesize
156KB
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memory/408-133-0x0000000002990000-0x00000000029B6000-memory.dmpFilesize
152KB
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memory/3804-178-0x00000000085E0000-0x0000000008616000-memory.dmpFilesize
216KB
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memory/3804-183-0x000000000A210000-0x000000000A7B4000-memory.dmpFilesize
5.6MB
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memory/3804-166-0x0000000008930000-0x0000000008F58000-memory.dmpFilesize
6.2MB
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memory/3804-177-0x0000000008580000-0x000000000859A000-memory.dmpFilesize
104KB
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memory/3804-165-0x00000000001D0000-0x00000000001F0000-memory.dmpFilesize
128KB
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memory/3804-179-0x00000000095E0000-0x0000000009C5A000-memory.dmpFilesize
6.5MB
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memory/3804-180-0x00000000086C0000-0x0000000008756000-memory.dmpFilesize
600KB
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memory/3804-181-0x0000000008660000-0x0000000008682000-memory.dmpFilesize
136KB
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memory/3804-182-0x0000000009060000-0x00000000090C6000-memory.dmpFilesize
408KB
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memory/3804-167-0x0000000004C70000-0x0000000004C80000-memory.dmpFilesize
64KB
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memory/3804-184-0x00000000087A0000-0x00000000087BE000-memory.dmpFilesize
120KB
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memory/3804-185-0x00000000090D0000-0x000000000911A000-memory.dmpFilesize
296KB
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memory/3804-186-0x0000000009530000-0x0000000009596000-memory.dmpFilesize
408KB
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memory/3804-187-0x0000000009FF0000-0x000000000A012000-memory.dmpFilesize
136KB
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memory/3804-197-0x0000000007660000-0x000000000767E000-memory.dmpFilesize
120KB
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memory/3804-198-0x00000000FEFB0000-0x00000000FEFC0000-memory.dmpFilesize
64KB
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memory/3804-199-0x0000000007910000-0x000000000791A000-memory.dmpFilesize
40KB