ramnit | bc8f1f867b2e6c7d90ee8db77ce5e6e7bb14fabbe9cf4b53092b8915c59eb572

Analysis

max time kernel
93s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
11/06/2024, 02:36

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General

Target
bc8f1f867b2e6c7d90ee8db77ce5e6e7bb14fabbe9cf4b53092b8915c59eb572.dll
Size 719KB
Sample240611-c32lca1djc
SHA256 bc8f1f867b2e6c7d90ee8db77ce5e6e7bb14fabbe9cf4b53092b8915c59eb572
MD5 bcbf9d2fc64727580c2f6b88f965b980
SHA1 381e0beb7ec08a8be2ce29c5c34825ab7cac0345
SHA512 b61458a57d3d911b47fa00812602c91c1bcf1f8559d7c36ac1a440ca5f651a1f315e9aaea3d01316a5566c60d826afbcf03b91ff86480538ceb585b4cdfd1287
SSDEEP 12288:Fd4V2aZv2JArDRsYoQyErEjWiB26w8CXlYiCDXfL10u5Tu0X:Fd4rZiwDRsYP7rECiBrwllYTDjuu5y0
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

ramnit banker spyware stealer trojan upx worm

Malware Config

Signatures

Ramnit
Ramnit is a versatile family that holds viruses, worms, and Trojans.
trojan spyware stealer worm banker ramnit

UPX dump on OEP (original entry point) 7 IoCs

resource	yara_rule
behavioral2/files/0x000600000002327c-3.dat	UPX
behavioral2/memory/3760-2-0x0000000010000000-0x00000000100BA000-memory.dmp	UPX
behavioral2/memory/3200-4-0x0000000000400000-0x000000000042E000-memory.dmp	UPX
behavioral2/memory/3200-7-0x0000000000400000-0x000000000042E000-memory.dmp	UPX
behavioral2/memory/4120-13-0x0000000000400000-0x000000000042E000-memory.dmp	UPX
behavioral2/memory/4120-15-0x0000000000400000-0x000000000042E000-memory.dmp	UPX
behavioral2/memory/3760-17-0x0000000010000000-0x00000000100BA000-memory.dmp	UPX

Executes dropped EXE 2 IoCs

pid	Process
3200	rundll32Srv.exe
4120	DesktopLayer.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000600000002327c-3.dat	upx
behavioral2/memory/3200-4-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral2/memory/3200-7-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral2/memory/4120-13-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral2/memory/4120-15-0x0000000000400000-0x000000000042E000-memory.dmp	upx

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rundll32Srv.exe	rundll32.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Microsoft\px421A.tmp	rundll32Srv.exe
File created	C:\Program Files (x86)\Microsoft\DesktopLayer.exe	rundll32Srv.exe
File opened for modification	C:\Program Files (x86)\Microsoft\DesktopLayer.exe	rundll32Srv.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1348	3760	WerFault.exe	81

Modifies Internet Explorer settings 1 TTPs 30 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31112104"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\GPU\AdapterInfo = "vendorId=\"0x10de\",deviceID=\"0x8c\",subSysID=\"0x0\",revision=\"0x0\",version=\"10.0.19041.546\"hypervisor=\"No Hypervisor (No SLAT)\""	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Software\Microsoft\Internet Explorer\VersionManager	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "1280418506"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "1283543380"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{77D2A226-279B-11EF-9A94-5EF7A92F669A} = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31112104"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31112104"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Software\Microsoft\Internet Explorer\VersionManager	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Software\Microsoft\Internet Explorer\GPU	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "1280418506"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "424838390"	iexplore.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4120	DesktopLayer.exe
4120	DesktopLayer.exe
4120	DesktopLayer.exe
4120	DesktopLayer.exe
4120	DesktopLayer.exe
4120	DesktopLayer.exe
4120	DesktopLayer.exe
4120	DesktopLayer.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2824	iexplore.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
2824	iexplore.exe
2824	iexplore.exe
1688	IEXPLORE.EXE
1688	IEXPLORE.EXE
1688	IEXPLORE.EXE
1688	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4724 wrote to memory of 3760	4724	rundll32.exe	81
PID 4724 wrote to memory of 3760	4724	rundll32.exe	81
PID 4724 wrote to memory of 3760	4724	rundll32.exe	81
PID 3760 wrote to memory of 3200	3760	rundll32.exe	82
PID 3760 wrote to memory of 3200	3760	rundll32.exe	82
PID 3760 wrote to memory of 3200	3760	rundll32.exe	82
PID 3200 wrote to memory of 4120	3200	rundll32Srv.exe	85
PID 3200 wrote to memory of 4120	3200	rundll32Srv.exe	85
PID 3200 wrote to memory of 4120	3200	rundll32Srv.exe	85
PID 4120 wrote to memory of 2824	4120	DesktopLayer.exe	86
PID 4120 wrote to memory of 2824	4120	DesktopLayer.exe	86
PID 2824 wrote to memory of 1688	2824	iexplore.exe	88
PID 2824 wrote to memory of 1688	2824	iexplore.exe	88
PID 2824 wrote to memory of 1688	2824	iexplore.exe	88

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bc8f1f867b2e6c7d90ee8db77ce5e6e7bb14fabbe9cf4b53092b8915c59eb572.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4724
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\bc8f1f867b2e6c7d90ee8db77ce5e6e7bb14fabbe9cf4b53092b8915c59eb572.dll,#1
  2⤵
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:3760
- - C:\Windows\SysWOW64\rundll32Srv.exe
    C:\Windows\SysWOW64\rundll32Srv.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Program Files directory
    - Suspicious use of WriteProcessMemory
    PID:3200
  - - C:\Program Files (x86)\Microsoft\DesktopLayer.exe
      "C:\Program Files (x86)\Microsoft\DesktopLayer.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:4120
    - - C:\Program Files\Internet Explorer\iexplore.exe
        
        "C:\Program Files\Internet Explorer\iexplore.exe"
        5⤵
        Modifies Internet Explorer settings
        Suspicious use of FindShellTrayWindow
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:2824
      - C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2824 CREDAT:17410 /prefetch:2
        6⤵
        Modifies Internet Explorer settings
        Suspicious use of SetWindowsHookEx
        
        PID:1688
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3760 -s 608
    3⤵
    - Program crash
    PID:1348

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3760 -ip 3760
1⤵
PID:3836

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
Size 471B
SHA256 088079d3c0c9b9117e2427529a2e6ddd19bd694d1180dabf72cb80dfad1fbad3
MD5 ba5c07e84aaf8703c7f383a82d696ce7
SHA1 f51fbe8032555f84974ed041a09cc6211d8ee0af
SHA512 987db2bb8c1a95f754c724f5921152a3e1f6a4ca7b7c79f7b927eca93e9251e73eb91d8a972c094061a8dbfb6ad82e5133ed64ffb7d9c9de946b705f4081d31f
MD5 SHA1 SHA512

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7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
Size 404B
SHA256 22a060752fcd40a892ca514f92d08682d2500e35ffda05ee9f84d78af0c2cf42
MD5 5dfaa62da176a6a869d77122cf106e5f
SHA1 37c73985b318d9f74ec30d03acb3cf143cac67f1
SHA512 611b18c3cb99c803d006406eaf9f5c3049daf7d37d2e49835a4d8cfb6ece220ad9438806e8f9c9cbcaa56fa14bd1ca2ef26546a11cd527a26f37b6bceaa81f7a
MD5 SHA1 SHA512

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suggestions[1].en-US

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\TF1TYUIH\suggestions[1].en-US
Size 17KB
SHA256 c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad
MD5 5a34cb996293fde2cb7a4ac89587393a
SHA1 3c96c993500690d1a77873cd62bc639b3a10653f
SHA512 e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee
SSDEEP 384:K4gN8sGygaEKfWYSJUKbO7UckxtBjCdY7mO3D0C5l+piEieDSV126ry1/XSGKwG3:K4gNFXiKfWfJ1Kockxbd7mAt5Mp5ie2F
MD5 SHA1 SHA512 SSDEEP

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rundll32Srv.exe

Path C:\Windows\SysWOW64\rundll32Srv.exe
Size 55KB
SHA256 fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320
MD5 ff5e1f27193ce51eec318714ef038bef
SHA1 b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6
SHA512 c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a
SSDEEP 1536:Q+hzRsibKplyXTq8OGRnsPFG+RODTb7MXL5uXZnzE:bROzoTq0+RO7IwnY
MD5 SHA1 SHA512 SSDEEP

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memory/3200-4-0x0000000000400000-0x000000000042E000-memory.dmp

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memory/3200-7-0x0000000000400000-0x000000000042E000-memory.dmp

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memory/3200-6-0x00000000004C0000-0x00000000004CF000-memory.dmp

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memory/3760-2-0x0000000010000000-0x00000000100BA000-memory.dmp

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memory/3760-17-0x0000000010000000-0x00000000100BA000-memory.dmp

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memory/4120-13-0x0000000000400000-0x000000000042E000-memory.dmp

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memory/4120-15-0x0000000000400000-0x000000000042E000-memory.dmp

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memory/4120-14-0x0000000000490000-0x0000000000491000-memory.dmp

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