Analysis
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max time kernel
142s -
max time network
142s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
07-04-2024 23:44
Behavioral task
behavioral1
Sample
99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe
Resource
win7-20240319-en
Behavioral task
behavioral2
Sample
99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe
Resource
win10v2004-20240226-en
General
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Target
99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe
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Size
26KB
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MD5
8222cc29fdeb85cc5e71e5d2ba2cdc0e
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SHA1
467737c290a4db43806df42bcbdf4e37586a2f11
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SHA256
99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af
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SHA512
5cbae650c63b1f8d10943a9925af881b8dbafd27305997a0450c21993c45c862ed84b934860955f938ea3bdeffc791470e391370d933b2bc071cf72e7d07bb71
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SSDEEP
768:XkX3LKew369lp2z3Sd4baFXLjwP/Tgj93b8NIoT:6KcR4mjD9r82E
Malware Config
Signatures
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UPX dump on OEP (original entry point) 7 IoCs
Processes:
resource yara_rule behavioral2/memory/4364-0-0x00000000005C0000-0x00000000005D7000-memory.dmp UPX C:\Windows\CTS.exe UPX behavioral2/memory/4364-6-0x00000000005C0000-0x00000000005D7000-memory.dmp UPX behavioral2/memory/3388-8-0x0000000000130000-0x0000000000147000-memory.dmp UPX C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml UPX C:\Users\Admin\AppData\Local\Temp\fkN11rRNfm4VVt7.exe UPX behavioral2/memory/3388-30-0x0000000000130000-0x0000000000147000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
Processes:
CTS.exepid process 3388 CTS.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Processes:
resource yara_rule behavioral2/memory/4364-0-0x00000000005C0000-0x00000000005D7000-memory.dmp upx C:\Windows\CTS.exe upx behavioral2/memory/4364-6-0x00000000005C0000-0x00000000005D7000-memory.dmp upx behavioral2/memory/3388-8-0x0000000000130000-0x0000000000147000-memory.dmp upx C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml upx C:\Users\Admin\AppData\Local\Temp\fkN11rRNfm4VVt7.exe upx behavioral2/memory/3388-30-0x0000000000130000-0x0000000000147000-memory.dmp upx -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exeCTS.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" CTS.exe -
Drops file in Windows directory 2 IoCs
Processes:
99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exeCTS.exedescription ioc process File created C:\Windows\CTS.exe 99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exeCTS.exedescription pid process Token: SeDebugPrivilege 4364 99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe Token: SeDebugPrivilege 3388 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exedescription pid process target process PID 4364 wrote to memory of 3388 4364 99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe CTS.exe PID 4364 wrote to memory of 3388 4364 99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe CTS.exe PID 4364 wrote to memory of 3388 4364 99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe CTS.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe"C:\Users\Admin\AppData\Local\Temp\99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4364 -
C:\Windows\CTS.exe"C:\Windows\CTS.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:3388
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=760 --field-trial-handle=2276,i,1205556100727695622,5044463180471657307,262144 --variations-seed-version /prefetch:81⤵PID:2000
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
349KB
MD58dd6b7bea58e828ba83664e97517d2b3
SHA1570d5859ef904e1ccfd8a5099c610112af5b1846
SHA256f9fa35a38a5cd40a9be1737ed6fd53d7a26ef74590d2e80ba24dac487e2c6b3d
SHA512814e7a73b0280e139e0ee4ff8cfab822e142ba575d3efb4612c8369be5230e115bf25c545636091b30de4098ac693b7d93e8238845830d2e654e44bde574ec11
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Filesize
26KB
MD5f8f8c93eac92cd71e178137ccef9ef55
SHA1af3dde6566485eeaeec26de3908d3098354369a0
SHA256f992a996512c53eb0c51ba0ed95825826ca45d516eb960233cc8e8aec306eb2b
SHA512b330b26413300c7f727b86f7cb5550780d0151b306b3ed169889fca8b2b069d46eb408756d24033bacff2eacb8fa30fd09c6390be4f5a94e66d89145a7bc8a7c
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Filesize
26KB
MD5286211b8e0aad0533c45d8b8c351cc70
SHA1cb54a305a566c00742fb972c4ee62266e880ea78
SHA2561955407b2fd523e375303d560b987216b95105b421a8471218c0b65ceba847f3
SHA51291eddd484a40aee3a7a9254fd6843b3d9dd455e6a2c4d685d499ab1704d8644a6dc604ad14449e96b0754ae3e6c1c14c16d068605aa4e39840e0421aa7a4be35