b30dfb8608adf0c39754145ed1e8e8cf391ef1a5cafeb207bdb53dbfe80a4a08

Analysis

max time kernel
30s
max time network
33s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
24-03-2023 22:43

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General

Target

NeptnExternalFree.exe
Size

3.4MB
MD5

bbedbbb87552cceb179e196588684cbc
SHA1

d1b7d2834140f503d7a7b92df30fadece473c29c
SHA256

b30dfb8608adf0c39754145ed1e8e8cf391ef1a5cafeb207bdb53dbfe80a4a08
SHA512

1e65d28aad644fc791a01eb55d3dc53d6f5c63c5fb5c9e52c96c384b5109499364a0ca433e09383972419b02e53662f15f9d238c4313aeb6842a4057be9429f3
SSDEEP

98304:i1NGlQS2DA5FlCPfvJj2wmfXWjY9sz985D:i1N+QXAHlohyP/WsA98B

Score

9^/10

evasion themida trojan

Malware Config

Signatures

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

NeptnExternalFree.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ NeptnExternalFree.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	NeptnExternalFree.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

NeptnExternalFree.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	NeptnExternalFree.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	NeptnExternalFree.exe

Themida packer 5 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral1/memory/1984-54-0x000000013F470000-0x000000013FD89000-memory.dmp	themida
behavioral1/memory/1984-55-0x000000013F470000-0x000000013FD89000-memory.dmp	themida
behavioral1/memory/1984-56-0x000000013F470000-0x000000013FD89000-memory.dmp	themida
behavioral1/memory/1984-57-0x000000013F470000-0x000000013FD89000-memory.dmp	themida
behavioral1/memory/1984-79-0x000000013F470000-0x000000013FD89000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

NeptnExternalFree.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA NeptnExternalFree.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

NeptnExternalFree.exe

pid process

1984 NeptnExternalFree.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

468 1984 WerFault.exe NeptnExternalFree.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	NeptnExternalFree.exe

pid	process
1984	NeptnExternalFree.exe

pid	pid_target	process	target process
468	1984	WerFault.exe	NeptnExternalFree.exe

Modifies Internet Explorer settings 1 TTPs 30 IoCs

adware spyware

Modify Registry

T1112

Processes:

iexplore.exeIEXPLORE.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\Toolbar	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\DOMStorage\discord.com	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\IntelliForms	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\InternetRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\GPU	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\SearchScopes\DownloadRetries = "2"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\PageSetup	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\SearchScopes	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\DOMStorage	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{CE6A90C1-CA9D-11ED-B111-72D88D434236} = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\DOMStorage\discord.com\NumberOfSubdomains = "1"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\IETld\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\LowRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Internet Explorer\Zoom	iexplore.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

iexplore.exe

pid process

1748 iexplore.exe
Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

iexplore.exeIEXPLORE.EXE

pid process

1748 iexplore.exe
1748 iexplore.exe
1648 IEXPLORE.EXE
1648 IEXPLORE.EXE
1648 IEXPLORE.EXE
1648 IEXPLORE.EXE

pid	process
1748	iexplore.exe

pid	process
1748	iexplore.exe
1748	iexplore.exe
1648	IEXPLORE.EXE
1648	IEXPLORE.EXE
1648	IEXPLORE.EXE
1648	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

NeptnExternalFree.execmd.exeiexplore.exe

description	pid	process	target process
PID 1984 wrote to memory of 996	1984	NeptnExternalFree.exe	cmd.exe
PID 1984 wrote to memory of 996	1984	NeptnExternalFree.exe	cmd.exe
PID 1984 wrote to memory of 996	1984	NeptnExternalFree.exe	cmd.exe
PID 1984 wrote to memory of 468	1984	NeptnExternalFree.exe	WerFault.exe
PID 1984 wrote to memory of 468	1984	NeptnExternalFree.exe	WerFault.exe
PID 1984 wrote to memory of 468	1984	NeptnExternalFree.exe	WerFault.exe
PID 996 wrote to memory of 1748	996	cmd.exe	iexplore.exe
PID 996 wrote to memory of 1748	996	cmd.exe	iexplore.exe
PID 996 wrote to memory of 1748	996	cmd.exe	iexplore.exe
PID 1748 wrote to memory of 1648	1748	iexplore.exe	IEXPLORE.EXE
PID 1748 wrote to memory of 1648	1748	iexplore.exe	IEXPLORE.EXE
PID 1748 wrote to memory of 1648	1748	iexplore.exe	IEXPLORE.EXE
PID 1748 wrote to memory of 1648	1748	iexplore.exe	IEXPLORE.EXE

C:\Users\Admin\AppData\Local\Temp\NeptnExternalFree.exe
"C:\Users\Admin\AppData\Local\Temp\NeptnExternalFree.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:1984

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c start https://discord.gg/xCRS6yyPF6
2⤵
- Suspicious use of WriteProcessMemory
PID:996

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" https://discord.gg/xCRS6yyPF6
3⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1748

C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1748 CREDAT:275457 /prefetch:2
4⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:1648

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -u -p 1984 -s 136
2⤵
- Program crash
PID:468

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

T1102

Impact

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
Filesize
61KB

MD5
e71c8443ae0bc2e282c73faead0a6dd3

SHA1
0c110c1b01e68edfacaeae64781a37b1995fa94b

SHA256
95b0a5acc5bf70d3abdfd091d0c9f9063aa4fde65bd34dbf16786082e1992e72

SHA512
b38458c7fa2825afb72794f374827403d5946b1132e136a0ce075dfd351277cf7d957c88dc8a1e4adc3bcae1fa8010dae3831e268e910d517691de24326391a6

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize
342B

MD5
a5378a884f5b6102d2e9c83b40001576

SHA1
6bbb298b402ecc22e57d9350313d008a5cf97330

SHA256
8e78793d123ec41925e3db9d28663802393b94479c389d139ae732d3712da4f1

SHA512
f4d2154ee03d40a4cbc6d75603a582262201a76e1a535e37f7cc8bb16514081456f9e8e91fdc36ddd8b66c38483ebbd337bec9c1e9dc46213509f4460f7e0493

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize
304B

MD5
8b4e6e234c02be7b5f112ec1d0d9ac5e

SHA1
8636a4347b65c08cd891129acdcd17b821d7c5ff

SHA256
0a8e519540d4b567c00298e93b3d76a6f1607b2f38eb73849437ab2de1d08ce9

SHA512
ddbca365625849d2bd34e4921541874ff6d23d5d23372955351b11e746285def1988f98caf017e8de4a4a9023754d4212cefcc25f66af72934917f545d276270

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize
304B

MD5
4b893107d75bc1c7c7f04e21a5bd780b

SHA1
6aa17a3eaa4be1e773484581d628ad8fa02eaf9d

SHA256
94e686c145e28f0ad272adffdcd2f770e5153d3c83690262d907dd43708ccc0b

SHA512
d9c00c1a6180146e2c0b6ebe242a41b4264fdbc3e5e490ca87c8efbe3f193c93c664ad593ee0e71222b177c7153e8610d245a5b73b397c522052d3ac2e3ef7e1

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\imagestore\x4s3ygl\imagestore.dat
Filesize
28KB

MD5
bd94ccfd351c89bb022bd40ce2d0e104

SHA1
5cf343a1ce9fd4612f7ab15403e9c23306c29df1

SHA256
eedc82330ea39e1c852436270552d72b299fc5f409d9ac62500dd0f591916d44

SHA512
2f81cfa4cdf22dfafc6c083e3472946b580c2d9c6397ded1031271c3b57cb5fcf3ea07e389ad501b031dcc24e3485641f331c21daacb7dc2709ad5df1975abd8

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\7BYN4WSI\ec2c34cadd4b5f4594415127380a85e6[1].ico
Filesize
23KB

MD5
ec2c34cadd4b5f4594415127380a85e6

SHA1
e7e129270da0153510ef04a148d08702b980b679

SHA256
128e20b3b15c65dd470cb9d0dc8fe10e2ff9f72fac99ee621b01a391ef6b81c7

SHA512
c1997779ff5d0f74a7fbb359606dab83439c143fbdb52025495bdc3a7cb87188085eaf12cc434cbf63b3f8da5417c8a03f2e64f751c0a63508e4412ea4e7425c

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab88B2.tmp
Filesize
61KB

MD5
fc4666cbca561e864e7fdf883a9e6661

SHA1
2f8d6094c7a34bf12ea0bbf0d51ee9c5bb7939a5

SHA256
10f3deb6c452d749a7451b5d065f4c0449737e5ee8a44f4d15844b503141e65b

SHA512
c71f54b571e01f247f072be4bbebdf5d8410b67eb79a61e7e0d9853fe857ab9bd12f53e6af3394b935560178107291fc4be351b27deb388eba90ba949633d57d

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar88D4.tmp
Filesize
161KB

MD5
73b4b714b42fc9a6aaefd0ae59adb009

SHA1
efdaffd5b0ad21913d22001d91bf6c19ecb4ac41

SHA256
c0cf8cc04c34b5b80a2d86ad0eafb2dd71436f070c86b0321fba0201879625fd

SHA512
73af3c51b15f89237552b1718bef21fd80788fa416bab2cb2e7fb3a60d56249a716eda0d2dd68ab643752272640e7eaaaf57ce64bcb38373ddc3d035fb8d57cd

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar8ABD.tmp
Filesize
161KB

MD5
be2bec6e8c5653136d3e72fe53c98aa3

SHA1
a8182d6db17c14671c3d5766c72e58d87c0810de

SHA256
1919aab2a820642490169bdc4e88bd1189e22f83e7498bf8ebdfb62ec7d843fd

SHA512
0d1424ccdf0d53faf3f4e13d534e12f22388648aa4c23edbc503801e3c96b7f73c7999b760b5bef4b5e9dd923dffe21a21889b1ce836dd428420bf0f4f5327ff

Download Submit
memory/1984-79-0x000000013F470000-0x000000013FD89000-memory.dmp

Filesize
9.1MB

Download
memory/1984-78-0x0000000000100000-0x0000000000101000-memory.dmp

Filesize
4KB

Download
memory/1984-54-0x000000013F470000-0x000000013FD89000-memory.dmp

Filesize
9.1MB

Download
memory/1984-57-0x000000013F470000-0x000000013FD89000-memory.dmp

Filesize
9.1MB

Download
memory/1984-56-0x000000013F470000-0x000000013FD89000-memory.dmp

Filesize
9.1MB

Download
memory/1984-55-0x000000013F470000-0x000000013FD89000-memory.dmp

Filesize
9.1MB

Download