8f5906862b335c411cfcc94e428b16d8ea6cfbc0d384979181885261812ed913

Reason

Machine shutdown

General

Target

7c7fac9d9844e4187a7604b401c704f2.dll
Size

199KB
MD5

7c7fac9d9844e4187a7604b401c704f2
SHA1

25a60ce75daabedcddeb69f04abd4ab7928f7a65
SHA256

8f5906862b335c411cfcc94e428b16d8ea6cfbc0d384979181885261812ed913
SHA512

508508e2d0181991960727342a6e4cc1ad8da615dcb4f78b09f7ec0b27ab29f14a911a7971b7508e1fa65156a27201886d4419f63eac5335bb8d4590fdeade9d
SSDEEP

3072:eCdY0SWTzufHxnWDOvMWy5qWmAeq0XlFUQC+r20OEZsF5A:7O0JToxncpmDFUQlKEWM

Score

8^/10

persistence upx

Malware Config

Signatures

Modifies Shared Task Scheduler registry keys 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\SharedTaskScheduler	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\SharedTaskScheduler\{CEDE2188-484C-B239-A68E-DC1B84001001} = "7c7fac9d9844e4187a7604b401c704f2"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\SharedTaskScheduler	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\SharedTaskScheduler\{CEDE2188-484C-B239-A68E-DC1B84001001} = "rfrqtrdmhdxx"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\SharedTaskScheduler	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\SharedTaskScheduler\{CEDE2188-484C-B239-A68E-DC1B84001001} = "7c7fac9d9844"	regsvr32.exe

Loads dropped DLL 2 IoCs

pid	Process
2984	regsvr32.exe
8	regsvr32.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1368-0-0x0000000002160000-0x0000000002193000-memory.dmp	upx
behavioral2/memory/8-10-0x0000000000400000-0x0000000000433000-memory.dmp	upx
behavioral2/memory/1368-12-0x0000000002160000-0x0000000002193000-memory.dmp	upx
behavioral2/memory/2984-11-0x0000000000400000-0x0000000000433000-memory.dmp	upx
behavioral2/files/0x001100000002315e-9.dat	upx
behavioral2/memory/2984-5-0x0000000000400000-0x0000000000433000-memory.dmp	upx
behavioral2/files/0x000300000001f45f-4.dat	upx

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\rfrqtrdmhdxx.dll	regsvr32.exe
File created	C:\Windows\SysWOW64\rfrqtrdmhdxx.dll	regsvr32.exe
File opened for modification	C:\Windows\SysWOW64\7c7fac9d9844.dll	regsvr32.exe
File created	C:\Windows\SysWOW64\7c7fac9d9844.dll	regsvr32.exe

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "24"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe

Modifies registry class 18 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\7c7fac9d9844e4187a7604b401c704f2.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}\InprocServer32\ = "C:\\Windows\\SysWow64\\rfrqtrdmhdxx.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}\ = "C:\\Windows\\SysWow64\\7c7fac9d9844.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}\InprocServer32\ = "C:\\Windows\\SysWow64\\7c7fac9d9844.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\7c7fac9d9844e4187a7604b401c704f2.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}\ = "C:\\Windows\\SysWow64\\rfrqtrdmhdxx.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEDE2188-484C-B239-A68E-DC1B84001001}\InprocServer32	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeShutdownPrivilege	8	regsvr32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1444	LogonUI.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4812 wrote to memory of 1368	4812	regsvr32.exe	17
PID 4812 wrote to memory of 1368	4812	regsvr32.exe	17
PID 4812 wrote to memory of 1368	4812	regsvr32.exe	17
PID 1368 wrote to memory of 2984	1368	regsvr32.exe	26
PID 1368 wrote to memory of 2984	1368	regsvr32.exe	26
PID 1368 wrote to memory of 2984	1368	regsvr32.exe	26
PID 2984 wrote to memory of 8	2984	regsvr32.exe	21
PID 2984 wrote to memory of 8	2984	regsvr32.exe	21
PID 2984 wrote to memory of 8	2984	regsvr32.exe	21

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\7c7fac9d9844e4187a7604b401c704f2.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:4812
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\7c7fac9d9844e4187a7604b401c704f2.dll
  2⤵
  - Modifies Shared Task Scheduler registry keys
  - Drops file in System32 directory
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1368
- - C:\Windows\SysWOW64\regsvr32.exe
    C:\Windows\system32\regsvr32.exe C:\Windows\system32\rfrqtrdmhdxx.dll /s
    3⤵
    - Modifies Shared Task Scheduler registry keys
    - Loads dropped DLL
    - Drops file in System32 directory
    - Modifies registry class
    - Suspicious use of WriteProcessMemory
    PID:2984

C:\Windows\SysWOW64\regsvr32.exe
C:\Windows\system32\regsvr32.exe C:\Windows\system32\7c7fac9d9844.dll /s
1⤵
- Modifies Shared Task Scheduler registry keys
- Loads dropped DLL
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
PID:8

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa39bc055 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:1444

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

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\7c7fac9d9844.dll

Filesize
199KB

MD5
7c7fac9d9844e4187a7604b401c704f2

SHA1
25a60ce75daabedcddeb69f04abd4ab7928f7a65

SHA256
8f5906862b335c411cfcc94e428b16d8ea6cfbc0d384979181885261812ed913

SHA512
508508e2d0181991960727342a6e4cc1ad8da615dcb4f78b09f7ec0b27ab29f14a911a7971b7508e1fa65156a27201886d4419f63eac5335bb8d4590fdeade9d

Download Submit
C:\Windows\SysWOW64\rfrqtrdmhdxx.dll

Filesize
199KB

MD5
82c72cc48afd424049e8a1f1ebafa583

SHA1
3fbef8880e585ed611a30f8262b43bf7ecfaa9aa

SHA256
8d977b11ab73482288570871f966bda184a751dec7caa08876bf948fcd52e8c4

SHA512
096e41a76fb241b022c8d79a0db3e74cff7c36f22a757a53e800dad0b0c0abac1eddda09005f3b490482d8fe45cb28ad9a2d55eeea371dcef2b99c013f856f3b

Download Submit
memory/8-10-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/1368-0-0x0000000002160000-0x0000000002193000-memory.dmp

Filesize
204KB

Download
memory/1368-12-0x0000000002160000-0x0000000002193000-memory.dmp

Filesize
204KB

Download
memory/2984-11-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/2984-5-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads