f9e5fe3194d9734845dd782b8e41065577ed7628a112934f1a57599f8dd92209

Analysis

max time kernel
145s
max time network
152s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
17-12-2024 15:44

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Bootstraper.exe
Size

71.0MB
MD5

e82c016015eb049019b94fd51ecd6e49
SHA1

bc230a8342944ddb28007baa2bd29cb07b29294e
SHA256

af5852b2f7312ac76fcd4ec798b8aacf7a5338b329664d2a79a6f31619230828
SHA512

4faa37bf5cebc40469379671e6fe88344fcc9df54ac99d7ec179f04aeaa5d805d0a935b43d79747542cfc329e1f1e78d95cbe6db9235f994cc0fdfbb6e156b98
SSDEEP

393216:Hqc1qcLg6WDV34gkpyfVEHqy2I6Sug+FIOMWg6SvbMK1UO9mBX2GWjNYi1M:Kc1qcLgtDV3fq235ghiSjMKny2GWBM

Score

8^/10

discovery execution

Malware Config

Signatures

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2876	powershell.exe
3316	powershell.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Panther\UnattendGC\diagwrn.xml	UserOOBEBroker.exe
File opened for modification	C:\Windows\Panther\UnattendGC\setupact.log	UserOOBEBroker.exe
File opened for modification	C:\Windows\Panther\UnattendGC\setuperr.log	UserOOBEBroker.exe
File opened for modification	C:\Windows\Panther\UnattendGC\diagerr.xml	UserOOBEBroker.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FileCoAuth.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FileCoAuth.exe

GoLang User-Agent 3 IoCs

Uses default user-agent string defined by GoLang HTTP packages.

description	flow	ioc
HTTP User-Agent header	2	Go-http-client/1.1
HTTP User-Agent header	4	Go-http-client/1.1
HTTP User-Agent header	6	Go-http-client/1.1

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2876	powershell.exe
2876	powershell.exe
3316	powershell.exe
3316	powershell.exe

Suspicious behavior: LoadsDriver 6 IoCs

pid	Process
4	Process not Found
4	Process not Found
4	Process not Found
4	Process not Found
4	Process not Found
676	Process not Found

Suspicious use of AdjustPrivilegeToken 44 IoCs

description	pid	Process
Token: SeDebugPrivilege	2876	powershell.exe
Token: SeDebugPrivilege	3316	powershell.exe
Token: SeIncreaseQuotaPrivilege	228	wmic.exe
Token: SeSecurityPrivilege	228	wmic.exe
Token: SeTakeOwnershipPrivilege	228	wmic.exe
Token: SeLoadDriverPrivilege	228	wmic.exe
Token: SeSystemProfilePrivilege	228	wmic.exe
Token: SeSystemtimePrivilege	228	wmic.exe
Token: SeProfSingleProcessPrivilege	228	wmic.exe
Token: SeIncBasePriorityPrivilege	228	wmic.exe
Token: SeCreatePagefilePrivilege	228	wmic.exe
Token: SeBackupPrivilege	228	wmic.exe
Token: SeRestorePrivilege	228	wmic.exe
Token: SeShutdownPrivilege	228	wmic.exe
Token: SeDebugPrivilege	228	wmic.exe
Token: SeSystemEnvironmentPrivilege	228	wmic.exe
Token: SeRemoteShutdownPrivilege	228	wmic.exe
Token: SeUndockPrivilege	228	wmic.exe
Token: SeManageVolumePrivilege	228	wmic.exe
Token: 33	228	wmic.exe
Token: 34	228	wmic.exe
Token: 35	228	wmic.exe
Token: 36	228	wmic.exe
Token: SeIncreaseQuotaPrivilege	228	wmic.exe
Token: SeSecurityPrivilege	228	wmic.exe
Token: SeTakeOwnershipPrivilege	228	wmic.exe
Token: SeLoadDriverPrivilege	228	wmic.exe
Token: SeSystemProfilePrivilege	228	wmic.exe
Token: SeSystemtimePrivilege	228	wmic.exe
Token: SeProfSingleProcessPrivilege	228	wmic.exe
Token: SeIncBasePriorityPrivilege	228	wmic.exe
Token: SeCreatePagefilePrivilege	228	wmic.exe
Token: SeBackupPrivilege	228	wmic.exe
Token: SeRestorePrivilege	228	wmic.exe
Token: SeShutdownPrivilege	228	wmic.exe
Token: SeDebugPrivilege	228	wmic.exe
Token: SeSystemEnvironmentPrivilege	228	wmic.exe
Token: SeRemoteShutdownPrivilege	228	wmic.exe
Token: SeUndockPrivilege	228	wmic.exe
Token: SeManageVolumePrivilege	228	wmic.exe
Token: 33	228	wmic.exe
Token: 34	228	wmic.exe
Token: 35	228	wmic.exe
Token: 36	228	wmic.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3324 wrote to memory of 2876	3324	Bootstraper.exe	78
PID 3324 wrote to memory of 2876	3324	Bootstraper.exe	78
PID 2876 wrote to memory of 3316	2876	powershell.exe	80
PID 2876 wrote to memory of 3316	2876	powershell.exe	80
PID 3324 wrote to memory of 228	3324	Bootstraper.exe	81
PID 3324 wrote to memory of 228	3324	Bootstraper.exe	81

C:\Users\Admin\AppData\Local\Temp\Bootstraper.exe
"C:\Users\Admin\AppData\Local\Temp\Bootstraper.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3324
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -Command "Add-MpPreference -ExclusionPath \"C:\ProgramData\";" powershell -Command "Add-MpPreference -ExclusionPath \"C:\Users\Admin\AppData\Local\Temp\Bootstraper.exe\""
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2876
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionPath C:\Users\Admin\AppData\Local\Temp\Bootstraper.exe
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3316
- C:\Windows\System32\Wbem\wmic.exe
  wmic csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:228

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc
1⤵
PID:4144

C:\Windows\System32\oobe\UserOOBEBroker.exe
C:\Windows\System32\oobe\UserOOBEBroker.exe -Embedding
1⤵
- Drops file in Windows directory
PID:2784

C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe
C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe -Embedding
1⤵
- System Location Discovery: System Language Discovery
PID:1048

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k DevicesFlow -s DevicesFlowUserSvc
1⤵
PID:2796

C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe
C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe -Embedding
1⤵
- System Location Discovery: System Language Discovery
PID:4264

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\OneDrive\logs\Common\FileCoAuth-2024-12-17.1546.1048.1.odl

Filesize
706B

MD5
cc164330953420fee0df7e1256a88343

SHA1
8cf93716b54f2df595dd65f7d7bc034ecb13a947

SHA256
1a2ab3fc01c5072896d738209288095910d5cbaf2314280a5dc8b25443df5aa9

SHA512
d52e182f9e8f166f4de8988928b52cb3a73b0e2a3b0d6d83d221bac3cf9fb72546637a6753d1ad58ec20010beb5753b56e420f9e1657c6f1dd32c8b586106195

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
2e8eb51096d6f6781456fef7df731d97

SHA1
ec2aaf851a618fb43c3d040a13a71997c25bda43

SHA256
96bfd9dd5883329927fe8c08b8956355a1a6ceb30ceeb5d4252b346df32bc864

SHA512
0a73dc9a49f92d9dd556c2ca2e36761890b3538f355ee1f013e7cf648d8c4d065f28046cd4a167db3dea304d1fbcbcea68d11ce6e12a3f20f8b6c018a60422d2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_id2c5n53.lp4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2876-0-0x00007FF844613000-0x00007FF844615000-memory.dmp

Filesize
8KB

Download
memory/2876-9-0x000001F6DF480000-0x000001F6DF4A2000-memory.dmp

Filesize
136KB

Download
memory/2876-10-0x00007FF844610000-0x00007FF8450D2000-memory.dmp

Filesize
10.8MB

Download
memory/2876-11-0x00007FF844610000-0x00007FF8450D2000-memory.dmp

Filesize
10.8MB

Download
memory/2876-25-0x00007FF844610000-0x00007FF8450D2000-memory.dmp

Filesize
10.8MB

Download