99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af

General

Target
99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe
Size 26KB
Sample240407-3q6mmsab2s
SHA256 99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af
MD5 8222cc29fdeb85cc5e71e5d2ba2cdc0e
SHA1 467737c290a4db43806df42bcbdf4e37586a2f11
SHA512 5cbae650c63b1f8d10943a9925af881b8dbafd27305997a0450c21993c45c862ed84b934860955f938ea3bdeffc791470e391370d933b2bc071cf72e7d07bb71
SSDEEP 768:XkX3LKew369lp2z3Sd4baFXLjwP/Tgj93b8NIoT:6KcR4mjD9r82E
MD5 SHA1 SHA512 SSDEEP

Score

9^/10

Malware Config

Signatures

UPX dump on OEP (original entry point) 7 IoCs

resource	yara_rule
behavioral2/memory/4364-0-0x00000000005C0000-0x00000000005D7000-memory.dmp	UPX
behavioral2/files/0x000700000002333d-7.dat	UPX
behavioral2/memory/4364-6-0x00000000005C0000-0x00000000005D7000-memory.dmp	UPX
behavioral2/memory/3388-8-0x0000000000130000-0x0000000000147000-memory.dmp	UPX
behavioral2/files/0x00060000000226b0-11.dat	UPX
behavioral2/files/0x000800000002333c-28.dat	UPX
behavioral2/memory/3388-30-0x0000000000130000-0x0000000000147000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	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.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

UPX packed file 7 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4364-0-0x00000000005C0000-0x00000000005D7000-memory.dmp	upx
behavioral2/files/0x000700000002333d-7.dat	upx
behavioral2/memory/4364-6-0x00000000005C0000-0x00000000005D7000-memory.dmp	upx
behavioral2/memory/3388-8-0x0000000000130000-0x0000000000147000-memory.dmp	upx
behavioral2/files/0x00060000000226b0-11.dat	upx
behavioral2/files/0x000800000002333c-28.dat	upx
behavioral2/memory/3388-30-0x0000000000130000-0x0000000000147000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	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

description	ioc	Process
File created	C:\Windows\CTS.exe	99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4364	99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe
Token: SeDebugPrivilege	3388	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4364 wrote to memory of 3388	4364	99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe	94
PID 4364 wrote to memory of 3388	4364	99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe	94
PID 4364 wrote to memory of 3388	4364	99efa583e66941a2dd8c17d983876d4fe35de92e7be0b8d696c43580d129e1af.exe	94

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

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:8
1⤵
PID:2000

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 349KB
SHA256 f9fa35a38a5cd40a9be1737ed6fd53d7a26ef74590d2e80ba24dac487e2c6b3d
MD5 8dd6b7bea58e828ba83664e97517d2b3
SHA1 570d5859ef904e1ccfd8a5099c610112af5b1846
SHA512 814e7a73b0280e139e0ee4ff8cfab822e142ba575d3efb4612c8369be5230e115bf25c545636091b30de4098ac693b7d93e8238845830d2e654e44bde574ec11
SSDEEP 6144:59KQMbajLbv7mhIR5FIYOv/Mw057dMRFCYfD4OOBzpC8O2xsWgYdtQo7jc:5wn+jLm+LeYOv/L057uF/vOZpC8GadhE
MD5 SHA1 SHA512 SSDEEP

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fkN11rRNfm4VVt7.exe

Path C:\Users\Admin\AppData\Local\Temp\fkN11rRNfm4VVt7.exe
Size 26KB
SHA256 f992a996512c53eb0c51ba0ed95825826ca45d516eb960233cc8e8aec306eb2b
MD5 f8f8c93eac92cd71e178137ccef9ef55
SHA1 af3dde6566485eeaeec26de3908d3098354369a0
SHA512 b330b26413300c7f727b86f7cb5550780d0151b306b3ed169889fca8b2b069d46eb408756d24033bacff2eacb8fa30fd09c6390be4f5a94e66d89145a7bc8a7c
SSDEEP 768:XkX3LKew369lp2z3Sd4baFXLjwP/Tgj93b8NIoU:6KcR4mjD9r82v
MD5 SHA1 SHA512 SSDEEP

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CTS.exe

Path C:\Windows\CTS.exe
Size 26KB
SHA256 1955407b2fd523e375303d560b987216b95105b421a8471218c0b65ceba847f3
MD5 286211b8e0aad0533c45d8b8c351cc70
SHA1 cb54a305a566c00742fb972c4ee62266e880ea78
SHA512 91eddd484a40aee3a7a9254fd6843b3d9dd455e6a2c4d685d499ab1704d8644a6dc604ad14449e96b0754ae3e6c1c14c16d068605aa4e39840e0421aa7a4be35
SSDEEP 768:XkX3LKew369lp2z3Sd4baFXLjwP/Tgj93b8NIo:6KcR4mjD9r82
MD5 SHA1 SHA512 SSDEEP

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memory/3388-8-0x0000000000130000-0x0000000000147000-memory.dmp

Download

memory/3388-30-0x0000000000130000-0x0000000000147000-memory.dmp

Download

memory/4364-0-0x00000000005C0000-0x00000000005D7000-memory.dmp

Download

memory/4364-6-0x00000000005C0000-0x00000000005D7000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads