cfbfe562aae9179bfa9d6cfca07bc277ec48ec035b72b27fec7f49b4ca14657b

Analysis

max time kernel
151s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
06-11-2022 03:37

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General

Target

cfbfe562aae9179bfa9d6cfca07bc277ec48ec035b72b27fec7f49b4ca14657b.exe
Size

268KB
MD5

0a0e57a0fe628df8be4a06a46b345ff6
SHA1

b17ba3d3b1ca1a66f6ea3e934e22941f5a1b2be2
SHA256

cfbfe562aae9179bfa9d6cfca07bc277ec48ec035b72b27fec7f49b4ca14657b
SHA512

11ebd455c1d04545ca3da4cf4407d1b71c52389f5535abeca874aad74cee8eaf6b9d0f736a5f8780b462e7a89568b8fff5e37cf42b5f760a59dd65df533cdcfd
SSDEEP

6144:XbfO3SlNyTkyhlx0kRujRYO4VYAtHJ3DFLjxIE++/gAxcbibMoSN:LfIST8kk0kMlCPTvXxKXoSN

Score

10^/10

evasion persistence upx

Malware Config

Signatures

Modifies firewall policy service 2 TTPs 10 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications	reg.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Admin\AppData\Roaming\winlogon.exe = "C:\\Users\\Admin\\AppData\\Roaming\\winlogon.exe:*:Enabled:Windows Messanger"	reg.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	reg.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Admin\AppData\Roaming\darkeye-nosttingspersistent2.exe = "C:\\Users\\Admin\\AppData\\Roaming\\darkeye-nosttingspersistent2.exe:*:Enabled:Windows Messanger"	reg.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0"	reg.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	reg.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0"	reg.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	reg.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	reg.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	reg.exe

Executes dropped EXE 3 IoCs

pid	Process
3428	winlogon.exe
3068	winlogon.exe
2736	winlogon.exe

UPX packed file 19 IoCs

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

upx

resource	yara_rule
	upx
behavioral2/memory/3156-134-0x0000000000400000-0x000000000057E000-memory.dmp	upx
behavioral2/files/0x0007000000022e3d-139.dat	upx
behavioral2/files/0x0007000000022e3d-140.dat	upx
behavioral2/memory/3156-141-0x0000000000400000-0x000000000057E000-memory.dmp	upx
behavioral2/memory/3068-145-0x0000000000400000-0x000000000045D000-memory.dmp	upx
behavioral2/files/0x0007000000022e3d-146.dat	upx
behavioral2/memory/3068-148-0x0000000000400000-0x000000000045D000-memory.dmp	upx
behavioral2/memory/2736-151-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3428-153-0x0000000000400000-0x000000000057E000-memory.dmp	upx
behavioral2/memory/3068-157-0x0000000000400000-0x000000000045D000-memory.dmp	upx
behavioral2/memory/2736-159-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/2736-161-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3428-162-0x0000000000400000-0x000000000057E000-memory.dmp	upx
behavioral2/files/0x0007000000022e3d-155.dat	upx
behavioral2/memory/3068-150-0x0000000000400000-0x000000000045D000-memory.dmp	upx
behavioral2/memory/2736-172-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral2/memory/3068-173-0x0000000000400000-0x000000000045D000-memory.dmp	upx
behavioral2/memory/2736-174-0x0000000000400000-0x0000000000409000-memory.dmp	upx

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	cfbfe562aae9179bfa9d6cfca07bc277ec48ec035b72b27fec7f49b4ca14657b.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Winlogon = "C:\\Users\\Admin\\AppData\\Roaming\\winlogon.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3428 set thread context of 3068	3428	winlogon.exe	85
PID 3428 set thread context of 2736	3428	winlogon.exe	86

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

System Information Discovery
T1082

Modifies registry key 1 TTPs 4 IoCs

Modify Registry

T1112

pid	Process
4924	reg.exe
5044	reg.exe
1656	reg.exe
400	reg.exe

Suspicious use of AdjustPrivilegeToken 36 IoCs

description	pid	Process
Token: 1	3068	winlogon.exe
Token: SeCreateTokenPrivilege	3068	winlogon.exe
Token: SeAssignPrimaryTokenPrivilege	3068	winlogon.exe
Token: SeLockMemoryPrivilege	3068	winlogon.exe
Token: SeIncreaseQuotaPrivilege	3068	winlogon.exe
Token: SeMachineAccountPrivilege	3068	winlogon.exe
Token: SeTcbPrivilege	3068	winlogon.exe
Token: SeSecurityPrivilege	3068	winlogon.exe
Token: SeTakeOwnershipPrivilege	3068	winlogon.exe
Token: SeLoadDriverPrivilege	3068	winlogon.exe
Token: SeSystemProfilePrivilege	3068	winlogon.exe
Token: SeSystemtimePrivilege	3068	winlogon.exe
Token: SeProfSingleProcessPrivilege	3068	winlogon.exe
Token: SeIncBasePriorityPrivilege	3068	winlogon.exe
Token: SeCreatePagefilePrivilege	3068	winlogon.exe
Token: SeCreatePermanentPrivilege	3068	winlogon.exe
Token: SeBackupPrivilege	3068	winlogon.exe
Token: SeRestorePrivilege	3068	winlogon.exe
Token: SeShutdownPrivilege	3068	winlogon.exe
Token: SeDebugPrivilege	3068	winlogon.exe
Token: SeAuditPrivilege	3068	winlogon.exe
Token: SeSystemEnvironmentPrivilege	3068	winlogon.exe
Token: SeChangeNotifyPrivilege	3068	winlogon.exe
Token: SeRemoteShutdownPrivilege	3068	winlogon.exe
Token: SeUndockPrivilege	3068	winlogon.exe
Token: SeSyncAgentPrivilege	3068	winlogon.exe
Token: SeEnableDelegationPrivilege	3068	winlogon.exe
Token: SeManageVolumePrivilege	3068	winlogon.exe
Token: SeImpersonatePrivilege	3068	winlogon.exe
Token: SeCreateGlobalPrivilege	3068	winlogon.exe
Token: 31	3068	winlogon.exe
Token: 32	3068	winlogon.exe
Token: 33	3068	winlogon.exe
Token: 34	3068	winlogon.exe
Token: 35	3068	winlogon.exe
Token: SeDebugPrivilege	2736	winlogon.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
3156	cfbfe562aae9179bfa9d6cfca07bc277ec48ec035b72b27fec7f49b4ca14657b.exe
3428	winlogon.exe
3068	winlogon.exe
3068	winlogon.exe
2736	winlogon.exe
3068	winlogon.exe

Suspicious use of WriteProcessMemory 49 IoCs

description	pid	Process	procid_target
PID 3156 wrote to memory of 4152	3156	cfbfe562aae9179bfa9d6cfca07bc277ec48ec035b72b27fec7f49b4ca14657b.exe	80
PID 3156 wrote to memory of 4152	3156	cfbfe562aae9179bfa9d6cfca07bc277ec48ec035b72b27fec7f49b4ca14657b.exe	80
PID 3156 wrote to memory of 4152	3156	cfbfe562aae9179bfa9d6cfca07bc277ec48ec035b72b27fec7f49b4ca14657b.exe	80
PID 4152 wrote to memory of 956	4152	cmd.exe	83
PID 4152 wrote to memory of 956	4152	cmd.exe	83
PID 4152 wrote to memory of 956	4152	cmd.exe	83
PID 3156 wrote to memory of 3428	3156	cfbfe562aae9179bfa9d6cfca07bc277ec48ec035b72b27fec7f49b4ca14657b.exe	84
PID 3156 wrote to memory of 3428	3156	cfbfe562aae9179bfa9d6cfca07bc277ec48ec035b72b27fec7f49b4ca14657b.exe	84
PID 3156 wrote to memory of 3428	3156	cfbfe562aae9179bfa9d6cfca07bc277ec48ec035b72b27fec7f49b4ca14657b.exe	84
PID 3428 wrote to memory of 3068	3428	winlogon.exe	85
PID 3428 wrote to memory of 3068	3428	winlogon.exe	85
PID 3428 wrote to memory of 3068	3428	winlogon.exe	85
PID 3428 wrote to memory of 3068	3428	winlogon.exe	85
PID 3428 wrote to memory of 3068	3428	winlogon.exe	85
PID 3428 wrote to memory of 3068	3428	winlogon.exe	85
PID 3428 wrote to memory of 3068	3428	winlogon.exe	85
PID 3428 wrote to memory of 3068	3428	winlogon.exe	85
PID 3428 wrote to memory of 2736	3428	winlogon.exe	86
PID 3428 wrote to memory of 2736	3428	winlogon.exe	86
PID 3428 wrote to memory of 2736	3428	winlogon.exe	86
PID 3428 wrote to memory of 2736	3428	winlogon.exe	86
PID 3428 wrote to memory of 2736	3428	winlogon.exe	86
PID 3428 wrote to memory of 2736	3428	winlogon.exe	86
PID 3428 wrote to memory of 2736	3428	winlogon.exe	86
PID 3428 wrote to memory of 2736	3428	winlogon.exe	86
PID 3068 wrote to memory of 2332	3068	winlogon.exe	93
PID 3068 wrote to memory of 2332	3068	winlogon.exe	93
PID 3068 wrote to memory of 2332	3068	winlogon.exe	93
PID 3068 wrote to memory of 4988	3068	winlogon.exe	92
PID 3068 wrote to memory of 4988	3068	winlogon.exe	92
PID 3068 wrote to memory of 4988	3068	winlogon.exe	92
PID 3068 wrote to memory of 5100	3068	winlogon.exe	88
PID 3068 wrote to memory of 5100	3068	winlogon.exe	88
PID 3068 wrote to memory of 5100	3068	winlogon.exe	88
PID 3068 wrote to memory of 3760	3068	winlogon.exe	91
PID 3068 wrote to memory of 3760	3068	winlogon.exe	91
PID 3068 wrote to memory of 3760	3068	winlogon.exe	91
PID 5100 wrote to memory of 5044	5100	cmd.exe	96
PID 5100 wrote to memory of 5044	5100	cmd.exe	96
PID 5100 wrote to memory of 5044	5100	cmd.exe	96
PID 3760 wrote to memory of 4924	3760	cmd.exe	95
PID 3760 wrote to memory of 4924	3760	cmd.exe	95
PID 3760 wrote to memory of 4924	3760	cmd.exe	95
PID 2332 wrote to memory of 1656	2332	cmd.exe	97
PID 2332 wrote to memory of 1656	2332	cmd.exe	97
PID 2332 wrote to memory of 1656	2332	cmd.exe	97
PID 4988 wrote to memory of 400	4988	cmd.exe	98
PID 4988 wrote to memory of 400	4988	cmd.exe	98
PID 4988 wrote to memory of 400	4988	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\cfbfe562aae9179bfa9d6cfca07bc277ec48ec035b72b27fec7f49b4ca14657b.exe
"C:\Users\Admin\AppData\Local\Temp\cfbfe562aae9179bfa9d6cfca07bc277ec48ec035b72b27fec7f49b4ca14657b.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3156
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\BAKZp.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4152
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Winlogon" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\winlogon.exe" /f
    3⤵
    - Adds Run key to start application
    PID:956
- C:\Users\Admin\AppData\Roaming\winlogon.exe
  "C:\Users\Admin\AppData\Roaming\winlogon.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3428
- - C:\Users\Admin\AppData\Roaming\winlogon.exe
    winlogon.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3068
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:5100
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
        5⤵
        Modifies firewall policy service
        Modifies registry key
        
        PID:5044
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\darkeye-nosttingspersistent2.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\darkeye-nosttingspersistent2.exe:*:Enabled:Windows Messanger" /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3760
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\darkeye-nosttingspersistent2.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\darkeye-nosttingspersistent2.exe:*:Enabled:Windows Messanger" /f
        5⤵
        Modifies firewall policy service
        Modifies registry key
        
        PID:4924
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\winlogon.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\winlogon.exe:*:Enabled:Windows Messanger" /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4988
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\winlogon.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\winlogon.exe:*:Enabled:Windows Messanger" /f
        5⤵
        Modifies firewall policy service
        Modifies registry key
        
        PID:400
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2332
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
        5⤵
        Modifies firewall policy service
        Modifies registry key
        
        PID:1656
- - C:\Users\Admin\AppData\Roaming\winlogon.exe
    C:\Users\Admin\AppData\Roaming\winlogon.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2736

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

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\Temp\BAKZp.bat

Filesize
138B

MD5
4da6717f2c70f4bd32ad33a227a2ff47

SHA1
3d7f7159e1f695bd469287d1ad4ffa0841b407a8

SHA256
a12bb2e5d2fb0b3c400ce311fae72995a00b57a97d23e4b9effec47cff189d07

SHA512
6765314054ad9bf2164058248f3d3a17775176925abbe4376aec030dca3a5e59be8b9e96139941fec2b2e1a9bff38f87abdb29ea09a299d8ab7e23ecec4083df

Download Submit
C:\Users\Admin\AppData\Roaming\winlogon.exe

Filesize
268KB

MD5
822462396733875859a21278d5424418

SHA1
eb17d8b5373b940c6858360349cea12c0eef33ac

SHA256
8dc230574da090335d6b1084a22ffd45d051439a313bcef89c02e63c48adce18

SHA512
1b36d05c5631b48972597349281558582bfa8f3647fdb811305ae91b04dcda6113f8e990e570c33c473d8f01c06c5acc8505a11b1305af41c1ec757b0c663a9a

Download Submit
C:\Users\Admin\AppData\Roaming\winlogon.exe

Filesize
268KB

MD5
822462396733875859a21278d5424418

SHA1
eb17d8b5373b940c6858360349cea12c0eef33ac

SHA256
8dc230574da090335d6b1084a22ffd45d051439a313bcef89c02e63c48adce18

SHA512
1b36d05c5631b48972597349281558582bfa8f3647fdb811305ae91b04dcda6113f8e990e570c33c473d8f01c06c5acc8505a11b1305af41c1ec757b0c663a9a

Download Submit
C:\Users\Admin\AppData\Roaming\winlogon.exe

Filesize
268KB

MD5
822462396733875859a21278d5424418

SHA1
eb17d8b5373b940c6858360349cea12c0eef33ac

SHA256
8dc230574da090335d6b1084a22ffd45d051439a313bcef89c02e63c48adce18

SHA512
1b36d05c5631b48972597349281558582bfa8f3647fdb811305ae91b04dcda6113f8e990e570c33c473d8f01c06c5acc8505a11b1305af41c1ec757b0c663a9a

Download Submit
C:\Users\Admin\AppData\Roaming\winlogon.exe

Filesize
268KB

MD5
822462396733875859a21278d5424418

SHA1
eb17d8b5373b940c6858360349cea12c0eef33ac

SHA256
8dc230574da090335d6b1084a22ffd45d051439a313bcef89c02e63c48adce18

SHA512
1b36d05c5631b48972597349281558582bfa8f3647fdb811305ae91b04dcda6113f8e990e570c33c473d8f01c06c5acc8505a11b1305af41c1ec757b0c663a9a

Download Submit
memory/2736-172-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2736-159-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2736-174-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2736-151-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2736-161-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/3068-148-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/3068-173-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/3068-157-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/3068-150-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/3068-145-0x0000000000400000-0x000000000045D000-memory.dmp

Filesize
372KB

Download
memory/3156-141-0x0000000000400000-0x000000000057E000-memory.dmp

Filesize
1.5MB

Download
memory/3156-134-0x0000000000400000-0x000000000057E000-memory.dmp

Filesize
1.5MB

Download
memory/3428-162-0x0000000000400000-0x000000000057E000-memory.dmp

Filesize
1.5MB

Download
memory/3428-153-0x0000000000400000-0x000000000057E000-memory.dmp

Filesize
1.5MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads