9296967bd7520e26732cb92dc2e7adb28ca69ee68d58cdd891bc26a2b7a1bdc0

Analysis

max time kernel
151s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06/06/2024, 03:02

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General

Target

9296967bd7520e26732cb92dc2e7adb28ca69ee68d58cdd891bc26a2b7a1bdc0.exe
Size

211KB
MD5

d3c5c0b268c2d7c671fc0099c1fabdfa
SHA1

989457fbbab0d05e851e67aec64e8c3137d46765
SHA256

9296967bd7520e26732cb92dc2e7adb28ca69ee68d58cdd891bc26a2b7a1bdc0
SHA512

5d79ab391465abc6aa71bde6188ed60c9dd9d0d7465fc6875f2c5ab9c7598d74983ad0a4787fe431a7edc60b30904daeafe6965670c9a943de3e7f5f56a3244a
SSDEEP

3072:JD6Xtx68yygRBE52mxkEOHLRMpZ4deth8PEAjAfIbAYGPhz6sPJBInxZqOZ:Jh8cBzHLRMpZ4d1ZZ

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\userinit.exe"	userinit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\userinit.exe"	swchost.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	userinit.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	swchost.exe

Modifies Installed Components in the registry 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	userinit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Local\\mrsys.exe MR"	userinit.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	swchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}\StubPath = "C:\\Users\\Admin\\AppData\\Local\\mrsys.exe MR"	swchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	swchost.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	swchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Local\\mrsys.exe MR"	swchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	swchost.exe

Executes dropped EXE 4 IoCs

pid	Process
4000	userinit.exe
1052	spoolsw.exe
2036	swchost.exe
2068	spoolsw.exe

Adds Run key to start application 2 TTPs 4 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\RunOnce\userinit = "c:\\windows\\userinit.exe RO"	userinit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Swchost = "c:\\windows\\swchost.exe RO"	userinit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\userinit = "c:\\windows\\userinit.exe RO"	swchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Swchost = "c:\\windows\\swchost.exe RO"	swchost.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\system\udsys.exe	userinit.exe

Drops file in Windows directory 5 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\userinit.exe	9296967bd7520e26732cb92dc2e7adb28ca69ee68d58cdd891bc26a2b7a1bdc0.exe
File opened for modification	\??\c:\windows\spoolsw.exe	userinit.exe
File opened for modification	\??\c:\windows\swchost.exe	spoolsw.exe
File opened for modification	\??\c:\windows\userinit.exe	userinit.exe
File opened for modification	\??\c:\windows\swchost.exe	swchost.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4860	9296967bd7520e26732cb92dc2e7adb28ca69ee68d58cdd891bc26a2b7a1bdc0.exe
4860	9296967bd7520e26732cb92dc2e7adb28ca69ee68d58cdd891bc26a2b7a1bdc0.exe
4000	userinit.exe
4000	userinit.exe
4000	userinit.exe
4000	userinit.exe
4000	userinit.exe
4000	userinit.exe
4000	userinit.exe
2036	swchost.exe
4000	userinit.exe
2036	swchost.exe
2036	swchost.exe
2036	swchost.exe
2036	swchost.exe
4000	userinit.exe
2036	swchost.exe
4000	userinit.exe
4000	userinit.exe
2036	swchost.exe
4000	userinit.exe
2036	swchost.exe
4000	userinit.exe
4000	userinit.exe
2036	swchost.exe
2036	swchost.exe
4000	userinit.exe
4000	userinit.exe
2036	swchost.exe
2036	swchost.exe
4000	userinit.exe
4000	userinit.exe
2036	swchost.exe
2036	swchost.exe
4000	userinit.exe
4000	userinit.exe
2036	swchost.exe
2036	swchost.exe
4000	userinit.exe
4000	userinit.exe
2036	swchost.exe
2036	swchost.exe
4000	userinit.exe
4000	userinit.exe
2036	swchost.exe
2036	swchost.exe
4000	userinit.exe
4000	userinit.exe
2036	swchost.exe
2036	swchost.exe
4000	userinit.exe
4000	userinit.exe
2036	swchost.exe
2036	swchost.exe
4000	userinit.exe
4000	userinit.exe
2036	swchost.exe
2036	swchost.exe
4000	userinit.exe
4000	userinit.exe
2036	swchost.exe
2036	swchost.exe
4000	userinit.exe
4000	userinit.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
4000	userinit.exe
2036	swchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
4860	9296967bd7520e26732cb92dc2e7adb28ca69ee68d58cdd891bc26a2b7a1bdc0.exe
4860	9296967bd7520e26732cb92dc2e7adb28ca69ee68d58cdd891bc26a2b7a1bdc0.exe
4000	userinit.exe
4000	userinit.exe
1052	spoolsw.exe
1052	spoolsw.exe
2036	swchost.exe
2036	swchost.exe
2068	spoolsw.exe
2068	spoolsw.exe
4000	userinit.exe
4000	userinit.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4860 wrote to memory of 4000	4860	9296967bd7520e26732cb92dc2e7adb28ca69ee68d58cdd891bc26a2b7a1bdc0.exe	92
PID 4860 wrote to memory of 4000	4860	9296967bd7520e26732cb92dc2e7adb28ca69ee68d58cdd891bc26a2b7a1bdc0.exe	92
PID 4860 wrote to memory of 4000	4860	9296967bd7520e26732cb92dc2e7adb28ca69ee68d58cdd891bc26a2b7a1bdc0.exe	92
PID 4000 wrote to memory of 1052	4000	userinit.exe	93
PID 4000 wrote to memory of 1052	4000	userinit.exe	93
PID 4000 wrote to memory of 1052	4000	userinit.exe	93
PID 1052 wrote to memory of 2036	1052	spoolsw.exe	94
PID 1052 wrote to memory of 2036	1052	spoolsw.exe	94
PID 1052 wrote to memory of 2036	1052	spoolsw.exe	94
PID 2036 wrote to memory of 2068	2036	swchost.exe	95
PID 2036 wrote to memory of 2068	2036	swchost.exe	95
PID 2036 wrote to memory of 2068	2036	swchost.exe	95

C:\Users\Admin\AppData\Local\Temp\9296967bd7520e26732cb92dc2e7adb28ca69ee68d58cdd891bc26a2b7a1bdc0.exe
"C:\Users\Admin\AppData\Local\Temp\9296967bd7520e26732cb92dc2e7adb28ca69ee68d58cdd891bc26a2b7a1bdc0.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4860
- \??\c:\windows\userinit.exe
  c:\windows\userinit.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visiblity of hidden/system files in Explorer
  - Modifies Installed Components in the registry
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in System32 directory
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4000
- - \??\c:\windows\spoolsw.exe
    c:\windows\spoolsw.exe SE
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1052
  - - \??\c:\windows\swchost.exe
      c:\windows\swchost.exe
      4⤵
      Modifies WinLogon for persistence
      Modifies visiblity of hidden/system files in Explorer
      Modifies Installed Components in the registry
      Executes dropped EXE
      Adds Run key to start application
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2036
    - - \??\c:\windows\spoolsw.exe
        
        c:\windows\spoolsw.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:2068

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=1408 --field-trial-handle=2676,i,447940133669489189,1353734109898858672,262144 --variations-seed-version /prefetch:8
1⤵
PID:2772

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\mrsys.exe

Filesize
211KB

MD5
84d0bd45862fba3af9363540c0f44fe7

SHA1
65b96fa4619884201c76e25be10d60f15e9a0209

SHA256
94569b1cdee0274eed08fe0a4ab702a80706697e3fe47986db027b1258c50108

SHA512
aeb1203cddfe686e75b0123b0e148f9a86baadc36e425286119ddcd64d4645fcfe02a2d1d4f036667d8a0ec2f14c87a13458c0decce9b1d1179d48a896ad0638

Download Submit
C:\Windows\spoolsw.exe

Filesize
211KB

MD5
13405c0a97e19b9f4aaa97f1bed11e18

SHA1
2698ed27fdceadabdab29ed76ec155a7ff944081

SHA256
87283c6f79ab8c7344563396ce628d0e943ac00b4eb9a5b2d90fddb4b411ee3a

SHA512
907e705114f570756ba99cd312e4ce5109af5b66e19e2dd5e012ede0ff4499507f16f4bcb0b33797501dc413744260b0ab13c38acff99900f034e9ec7fae97a3

Download Submit
C:\Windows\swchost.exe

Filesize
211KB

MD5
47bc37374556cad16bc42adbc514b020

SHA1
ed61df6f58192d12139a7e56058c3ac342df78e8

SHA256
5ebf6b49f654050f7b978010bef5cbba4804ee4b81a45165ee5b13a318037fb7

SHA512
78d951a146a400d0a2e163fe6e97808544f95fe2cb05cde86be71bd4609da3512224ff4c2e1d2623eb9e9a301d9539594acbf8450b4ab02d76e620dbc5454f97

Download Submit
C:\Windows\userinit.exe

Filesize
211KB

MD5
0cb872495a977ea69fdc82345d7eed30

SHA1
c5a102926aba33c54f6c69d72aab0add21e161c1

SHA256
f9bb53a936169c906f26a02b365fa4d3fff2ed4c944db3e53d7a958dff3b9d53

SHA512
bad8dce806c564ea0167f0fb05805c2a8cbdf723652e9b8fd7e928331da1db1be4454daf59b0639e2767d4b074c96ad8b8ae2650b367fb78fd7d5c60a1962c10

Download Submit