ramnit | af58ed0c9e4d8ee041b78e05fb567cdeb6bbf877dfacdf82f0d71a0aaf145728

Analysis

max time kernel
92s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08/04/2024, 00:26

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General

Target
af58ed0c9e4d8ee041b78e05fb567cdeb6bbf877dfacdf82f0d71a0aaf145728.dll
Size 202KB
Sample240408-arldwabc93
SHA256 af58ed0c9e4d8ee041b78e05fb567cdeb6bbf877dfacdf82f0d71a0aaf145728
MD5 fb2353111a189153817b8369a8d9e696
SHA1 2e8388755eec4d91b2fc7c7c5dda3f938b68b654
SHA512 5d2c1d56949f208df332539a96a8c0bfd53008f46eafd05f609c7f980ce20b4dd54bdefaf31c4a2b0f020c92b32ad524f589688dacdf534a1602bf1bc4420081
SSDEEP 3072:lpUK37hVo36S87E8BomMtRbW6siCOcQfCq+A8vmoD9Dbohxlh:v332P1aoDW6DCOcnH2hTh
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) 5 IoCs

resource	yara_rule
behavioral2/memory/1944-4-0x0000000000400000-0x000000000043F000-memory.dmp	UPX
behavioral2/files/0x00080000000231ff-3.dat	UPX
behavioral2/memory/1944-8-0x0000000000400000-0x000000000043F000-memory.dmp	UPX
behavioral2/memory/3900-14-0x0000000000400000-0x000000000043F000-memory.dmp	UPX
behavioral2/memory/3900-15-0x0000000000400000-0x000000000043F000-memory.dmp	UPX

Executes dropped EXE 2 IoCs

pid	Process
1944	rundll32Srv.exe
3900	DesktopLayer.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1944-4-0x0000000000400000-0x000000000043F000-memory.dmp	upx
behavioral2/files/0x00080000000231ff-3.dat	upx
behavioral2/memory/1944-8-0x0000000000400000-0x000000000043F000-memory.dmp	upx
behavioral2/memory/3900-14-0x0000000000400000-0x000000000043F000-memory.dmp	upx
behavioral2/memory/3900-15-0x0000000000400000-0x000000000043F000-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\px77EF.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

Modifies Internet Explorer settings 1 TTPs 30 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{B2F4316E-F53E-11EE-B09F-E63A1A6527EC} = "0"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\VersionManager	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31099211"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "2271223619"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\VersionManager	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\GPU	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "2278411096"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "2271223619"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31099211"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31099211"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "419300988"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\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

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3900	DesktopLayer.exe
3900	DesktopLayer.exe
3900	DesktopLayer.exe
3900	DesktopLayer.exe
3900	DesktopLayer.exe
3900	DesktopLayer.exe
3900	DesktopLayer.exe
3900	DesktopLayer.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2428	iexplore.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
2428	iexplore.exe
2428	iexplore.exe
4020	IEXPLORE.EXE
4020	IEXPLORE.EXE
4020	IEXPLORE.EXE
4020	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 772 wrote to memory of 2560	772	rundll32.exe	85
PID 772 wrote to memory of 2560	772	rundll32.exe	85
PID 772 wrote to memory of 2560	772	rundll32.exe	85
PID 2560 wrote to memory of 1944	2560	rundll32.exe	87
PID 2560 wrote to memory of 1944	2560	rundll32.exe	87
PID 2560 wrote to memory of 1944	2560	rundll32.exe	87
PID 1944 wrote to memory of 3900	1944	rundll32Srv.exe	88
PID 1944 wrote to memory of 3900	1944	rundll32Srv.exe	88
PID 1944 wrote to memory of 3900	1944	rundll32Srv.exe	88
PID 3900 wrote to memory of 2428	3900	DesktopLayer.exe	89
PID 3900 wrote to memory of 2428	3900	DesktopLayer.exe	89
PID 2428 wrote to memory of 4020	2428	iexplore.exe	90
PID 2428 wrote to memory of 4020	2428	iexplore.exe	90
PID 2428 wrote to memory of 4020	2428	iexplore.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\af58ed0c9e4d8ee041b78e05fb567cdeb6bbf877dfacdf82f0d71a0aaf145728.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:772
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\af58ed0c9e4d8ee041b78e05fb567cdeb6bbf877dfacdf82f0d71a0aaf145728.dll,#1
  2⤵
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:2560
- - 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:1944
  - - 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:3900
    - - 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:2428
      - C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2428 CREDAT:17410 /prefetch:2
        6⤵
        Modifies Internet Explorer settings
        Suspicious use of SetWindowsHookEx
        
        PID:4020

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 bdb9f9d35fdac68cfe4a2f615e01d10dc89baec837fe7515b70a6cfedb27d87b
MD5 8f3eb06776d4e1dfe1e742cb70e22357
SHA1 5ab03e56d3cfe9951e9598dd72ff258065253672
SHA512 450c5dccfbe02ac221b9b05b7f1af43ad9c83701120f8134dca66c03c9e20e38fedd76a0e62a47943044ebb00de338fa001ab662481c12ed61902b9f838c6a27
MD5 SHA1 SHA512

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7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
Size 404B
SHA256 a2a67d823dba64add578c216fd1ca421d292bbc99bb1c666eaea2592483fe3be
MD5 a7e63e6266cd74a611e8f639d5a61b73
SHA1 b00dd840731327589358cf0c425a530a1993c608
SHA512 ec67bfa71d04e887117a35825b4304b68ebcb73fb96a1d84f2feca2ba9c9a5f5d7c638d6bc6155bc9c955b5f596822566b773796ba6e6fa8a86cacb414b66c2a
MD5 SHA1 SHA512

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suggestions[1].en-US

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\V26HJUC5\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 193KB
SHA256 3415693eb699ee2ac60c36cf2e9ba2a99f5deeff0ef6e861f498fd5da2f96943
MD5 07b669669d185ff2eda4457648d557bf
SHA1 816ff7ce5eb7ff46f8b5de596e5a91d81f23d8b3
SHA512 e564f26ef8852f7e967ec1e5b895021bbb62ceb353c036f7d9d57f74f448d8e3251b101b82e99bf56316214f0526c508bc538da054caa37a0c6a2cf22bd4b410
SSDEEP 3072:HQz6R5eAuOOX7SMpNjxN4yjNEWt0kaotYqvLZi/443ooMBhXdkQ3gGlxG:HQz6R5TuJSMjFqW7tbvLZh4YoMB3gG2
MD5 SHA1 SHA512 SSDEEP

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memory/1944-4-0x0000000000400000-0x000000000043F000-memory.dmp

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memory/1944-5-0x0000000000570000-0x000000000057F000-memory.dmp

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memory/1944-8-0x0000000000400000-0x000000000043F000-memory.dmp

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memory/2560-0-0x0000000010000000-0x0000000010037000-memory.dmp

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memory/3900-15-0x0000000000400000-0x000000000043F000-memory.dmp

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memory/3900-17-0x0000000077142000-0x0000000077143000-memory.dmp

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memory/3900-16-0x0000000077142000-0x0000000077143000-memory.dmp

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memory/3900-13-0x00000000004A0000-0x00000000004A1000-memory.dmp

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memory/3900-14-0x0000000000400000-0x000000000043F000-memory.dmp

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