cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8

General

Target

cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe
Size

179KB
MD5

fc150e461355f607bcda8439f4e8ac6c
SHA1

fd8cdf427c8e6d064789d4c7ece1a3da47fb567c
SHA256

cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8
SHA512

578cd5b6fcfa7654152fef797649b602045e7f824f9acb421a6a590f13a7580a286b36545bc83a59f316405d36ee6b09743609a84dac49bc34823d7435f1e8f3
SSDEEP

3072:sFPzNvmJoIKpcDggzKtmPZzCKQsf4PIaNrr/yWTo9CjNxlqr9AjiRSzwWI8ZNq4J:sbcY0KtAYKQsirNrTyW89EaEiRSzwWI0

Score

7^/10

Malware Config

Signatures

Loads dropped DLL 6 IoCs

pid	Process
4172	cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe
4172	cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe
4172	cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe
4172	cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe
4172	cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe
4676	regsvr32.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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\dmwzksbalxehcj = "C:\\Windows\\System32\\regsvr32.exe /s \"C:\\Users\\Admin\\AppData\\Local\\Temp\\oljokmxodfnywyw.DLL\""	cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\dmwzksbalxehcj = "C:\\Windows\\System32\\regsvr32.exe /s \"C:\\Windows\\system32\\oljokmxodfnywyw.dll\""	regsvr32.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Installs/modifies Browser Helper Object 2 TTPs 4 IoCs

BHOs are DLL modules which act as plugins for Internet Explorer.

stealer adware

Modify Registry

T1112

Browser Extensions

T1176

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{FF1521E9-9954-20E1-4DFD-3D249EEE5DC4}	regsvr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{FF1521E9-9954-20E1-4DFD-3D249EEE5DC4}\NoExplorer = "1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{FF1521E9-9954-20E1-4DFD-3D249EEE5DC4}	cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{FF1521E9-9954-20E1-4DFD-3D249EEE5DC4}\NoExplorer = "1"	cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\marjdueymaj.exe	cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe

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

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 26 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (data)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 703c3f7ecccbd801	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\MINIE	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb01000000975fab978604b14697eb522259e91a10000000000200000000001066000000010000200000003bf6fc28084eb0836f75c46556c6b2b9eaf747704bf8f1ba61392934dc4bdbf4000000000e800000000200002000000008adbe8828c293bc04a653c4eaf19b4da7b8c4f4d826048d5ff466ff3a74c002200000002dcf622c5c20a3da217b55d8a1b7ce35842aaed4acd03c6d3ff19b44a317ade44000000071190e34cee4d31aa87e3aff40e335e4c27d18563056fd1115f6fccfa067971303f329937785b9a9c8898ab261ae381df09951f027111dcd5862235d9a5744c1	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = a0292c7ecccbd801	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{A7AA4E1B-37BF-11ED-89AC-DEF0885D2AEB} = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\MINIE\TabBandWidth = "500"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb01000000975fab978604b14697eb522259e91a1000000000020000000000106600000001000020000000789c58882bd4b9241a945a2e5cea022f739273399ea425c5b84cfe8cb57c7355000000000e800000000200002000000003ddf9b09ae084acd52c3486cf410bbf04698109275e2b545bf87143ad7099e320000000269cbbbf6cba17e4f68d03c490d5a8d04bafc47eea9801730102c082d58576ee4000000000e95e37adc4adba5403de87e127bf16e04c9b96f65d052f5545c1dfe213e4f1d8007ed266aa124236930dabe84548e48f50f7a2ff771eecd852d13b5f0336b4	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "370318172"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe

Modifies registry class 10 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FF1521E9-9954-20E1-4DFD-3D249EEE5DC4}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\oljokmxodfnywyw.DLL"	cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FF1521E9-9954-20E1-4DFD-3D249EEE5DC4}\ = "du-little browser enhancer"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FF1521E9-9954-20E1-4DFD-3D249EEE5DC4}\InProcServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FF1521E9-9954-20E1-4DFD-3D249EEE5DC4}\InProcServer32\ = "C:\\Windows\\SysWow64\\oljokmxodfnywyw.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FF1521E9-9954-20E1-4DFD-3D249EEE5DC4}\ = "du-little browser enhancer"	cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FF1521E9-9954-20E1-4DFD-3D249EEE5DC4}\InProcServer32	cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FF1521E9-9954-20E1-4DFD-3D249EEE5DC4}\InProcServer32\ThreadingModel = "Apartment"	cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FF1521E9-9954-20E1-4DFD-3D249EEE5DC4}	cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FF1521E9-9954-20E1-4DFD-3D249EEE5DC4}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FF1521E9-9954-20E1-4DFD-3D249EEE5DC4}\InProcServer32\ThreadingModel = "Apartment"	regsvr32.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1792	iexplore.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
1792	iexplore.exe
1792	iexplore.exe
1904	IEXPLORE.EXE
1904	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4172 wrote to memory of 4676	4172	cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe	80
PID 4172 wrote to memory of 4676	4172	cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe	80
PID 4172 wrote to memory of 4676	4172	cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe	80
PID 1792 wrote to memory of 1904	1792	iexplore.exe	83
PID 1792 wrote to memory of 1904	1792	iexplore.exe	83
PID 1792 wrote to memory of 1904	1792	iexplore.exe	83

C:\Users\Admin\AppData\Local\Temp\cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe
"C:\Users\Admin\AppData\Local\Temp\cb83b4209be9860026907e98e13882cc2bd83c7268751c7a48930eeeb562f1d8.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Installs/modifies Browser Helper Object
- Drops file in System32 directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4172
- C:\Windows\SysWOW64\regsvr32.exe
  "C:\Windows\system32\regsvr32.exe" /s "C:\Windows\system32\oljokmxodfnywyw.dll"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:4676

C:\Program Files (x86)\Internet Explorer\ielowutil.exe
"C:\Program Files (x86)\Internet Explorer\ielowutil.exe" -CLSID:{0002DF01-0000-0000-C000-000000000046} -Embedding
1⤵
PID:2532

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
1⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1792
- C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
  "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1792 CREDAT:17410 /prefetch:2
  2⤵
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:1904

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Browser Extensions

1

T1176

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

3

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsu6038.tmp\System.dll

Filesize
11KB

MD5
68edaafef887c72f0d85d4d64b6cbf52

SHA1
77c1fb3301d6eea2e882bc387af1a017678c58da

SHA256
7d8ce82f2b89f544ed90cc8febfcfa57b32d2c8600bb77f79bc8d8980f0f7477

SHA512
e1e6b45fd47553d8e72cf15faa8572d6cf3f0a5495a34f7cb63a2307502282e69d482db42f8a760feaa890a0dc9539e9661fea8179e4d6e18e1c90092b06d4b9

Download Submit
C:\Users\Admin\AppData\Local\Temp\oljokmxodfnywyw.dll

Filesize
296KB

MD5
cde81b9cbbad2ed951b041e2150f641d

SHA1
2aa6fff5e9c48b3b5fa057162fafe7a4699d411c

SHA256
24f8596e5473c3b6d4f243d2e9a26a0c5eb893d668ba4b2004f2af9ed090b7e7

SHA512
bb0acf09b3d76ed0729bb738e7cb6b8c14a28991467fb11dcb5c5c4f3d0deb6e80f7f45e2ee2d8032045c195812dac211d63499cc56bcd3664627c1bd55ebb98

Download Submit
C:\Users\Admin\AppData\Local\Temp\oljokmxodfnywyw.dll

Filesize
296KB

MD5
cde81b9cbbad2ed951b041e2150f641d

SHA1
2aa6fff5e9c48b3b5fa057162fafe7a4699d411c

SHA256
24f8596e5473c3b6d4f243d2e9a26a0c5eb893d668ba4b2004f2af9ed090b7e7

SHA512
bb0acf09b3d76ed0729bb738e7cb6b8c14a28991467fb11dcb5c5c4f3d0deb6e80f7f45e2ee2d8032045c195812dac211d63499cc56bcd3664627c1bd55ebb98

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

Filesize
296KB

MD5
cde81b9cbbad2ed951b041e2150f641d

SHA1
2aa6fff5e9c48b3b5fa057162fafe7a4699d411c

SHA256
24f8596e5473c3b6d4f243d2e9a26a0c5eb893d668ba4b2004f2af9ed090b7e7

SHA512
bb0acf09b3d76ed0729bb738e7cb6b8c14a28991467fb11dcb5c5c4f3d0deb6e80f7f45e2ee2d8032045c195812dac211d63499cc56bcd3664627c1bd55ebb98

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

Filesize
296KB

MD5
cde81b9cbbad2ed951b041e2150f641d

SHA1
2aa6fff5e9c48b3b5fa057162fafe7a4699d411c

SHA256
24f8596e5473c3b6d4f243d2e9a26a0c5eb893d668ba4b2004f2af9ed090b7e7

SHA512
bb0acf09b3d76ed0729bb738e7cb6b8c14a28991467fb11dcb5c5c4f3d0deb6e80f7f45e2ee2d8032045c195812dac211d63499cc56bcd3664627c1bd55ebb98

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

Filesize
296KB

MD5
cde81b9cbbad2ed951b041e2150f641d

SHA1
2aa6fff5e9c48b3b5fa057162fafe7a4699d411c

SHA256
24f8596e5473c3b6d4f243d2e9a26a0c5eb893d668ba4b2004f2af9ed090b7e7

SHA512
bb0acf09b3d76ed0729bb738e7cb6b8c14a28991467fb11dcb5c5c4f3d0deb6e80f7f45e2ee2d8032045c195812dac211d63499cc56bcd3664627c1bd55ebb98

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

Filesize
296KB

MD5
cde81b9cbbad2ed951b041e2150f641d

SHA1
2aa6fff5e9c48b3b5fa057162fafe7a4699d411c

SHA256
24f8596e5473c3b6d4f243d2e9a26a0c5eb893d668ba4b2004f2af9ed090b7e7

SHA512
bb0acf09b3d76ed0729bb738e7cb6b8c14a28991467fb11dcb5c5c4f3d0deb6e80f7f45e2ee2d8032045c195812dac211d63499cc56bcd3664627c1bd55ebb98

Download Submit
memory/4172-135-0x0000000003ED0000-0x0000000003F20000-memory.dmp

Filesize
320KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads