arkei | 965dffc8c73d88f296086b5c6324b2be6ef9cd5041d6d7822370f2a04dc1538b

Analysis

max time kernel
98s
max time network
135s
platform
windows7_x64
resource
win7-20220414-en
submitted
19-06-2022 04:04

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General

Target

tmp.exe
Size

288KB
MD5

2c087bb64cb5b12444c5ad9e20f46822
SHA1

3c7f3b016a684ca9c61c0ef43cf229d9e48de305
SHA256

965dffc8c73d88f296086b5c6324b2be6ef9cd5041d6d7822370f2a04dc1538b
SHA512

e32e97190f0c167546ae98a21b25a4e42da3e8168c89c40ae8c390aff88324fdf6e8960d1afc51ff7d9f6da9538471249a6d748ca11df035fb2d3ac7bdaa1688

Score

10^/10

arkei default discovery spyware stealer suricata

Malware Config

Extracted

Family

arkei

Botnet

Default

Signatures

Arkei
Arkei is an infostealer written in C++.
stealer arkei
suricata: ET MALWARE Win32/Vidar Variant/Mars CnC Activity (GET)
suricata: ET MALWARE Win32/Vidar Variant/Mars CnC Activity (GET)
suricata
suricata: ET MALWARE Win32/Vidar Variant/Mars Stealer CnC Exfil
suricata: ET MALWARE Win32/Vidar Variant/Mars Stealer CnC Exfil
suricata
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

uzk.0.exe

pid process

956 uzk.0.exe
Loads dropped DLL 8 IoCs

Processes:

tmp.exeuzk.0.exe

pid process

1280 tmp.exe
1280 tmp.exe
1280 tmp.exe
1280 tmp.exe
1280 tmp.exe
1280 tmp.exe
956 uzk.0.exe
956 uzk.0.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
956	uzk.0.exe

pid	process
1280	tmp.exe
1280	tmp.exe
1280	tmp.exe
1280	tmp.exe
1280	tmp.exe
1280	tmp.exe
956	uzk.0.exe
956	uzk.0.exe

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

uzk.0.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	uzk.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	uzk.0.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

276 timeout.exe

pid	process
276	timeout.exe

Modifies Internet Explorer settings 1 TTPs 34 IoCs

adware spyware

Modify Registry

T1112

Processes:

iexplore.exeIEXPLORE.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\IETld\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\IntelliForms	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\MFV = 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	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c00000000000000010000000083ffff0083ffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\InternetRegistry	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "362376421"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{DCDC9D51-EF84-11EC-8749-4224C87335A1} = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Zoom	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb010000004863fcdc101a3947b120786fa95ba35b00000000020000000000106600000001000020000000c96a643862bfe4836e5f7d94a1c633aec1df011a6ee006950aad1cda810ef053000000000e8000000002000020000000bf9bd127bd21430e13955dea293bb1da219645209ebf5186d46bdd84fffecc1220000000a631d4bb7bb0d7da97b11c1a06b19a7d8f3f7670cfebeab280baacae840e039b40000000b9f4b0fc9505f6fe8051362578f61aaa4a613a5ed56c7c9e2eda1a5b7acc9b3917c0ea692ab74c5e140c5e3abb5b204965d718f5aa08f2299ac4fd778fd90298	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\GPU	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\PageSetup	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Toolbar	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = d0a8a8b79183d801	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\LowRegistry	iexplore.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

iexplore.exe

pid process

1556 iexplore.exe
Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

iexplore.exeIEXPLORE.EXE

pid process

1556 iexplore.exe
1556 iexplore.exe
848 IEXPLORE.EXE
848 IEXPLORE.EXE
848 IEXPLORE.EXE
848 IEXPLORE.EXE

pid	process
1556	iexplore.exe

pid	process
1556	iexplore.exe
1556	iexplore.exe
848	IEXPLORE.EXE
848	IEXPLORE.EXE
848	IEXPLORE.EXE
848	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

tmp.exeiexplore.exeuzk.0.execmd.exe

description	pid	process	target process
PID 1280 wrote to memory of 956	1280	tmp.exe	uzk.0.exe
PID 1280 wrote to memory of 956	1280	tmp.exe	uzk.0.exe
PID 1280 wrote to memory of 956	1280	tmp.exe	uzk.0.exe
PID 1280 wrote to memory of 956	1280	tmp.exe	uzk.0.exe
PID 1280 wrote to memory of 1556	1280	tmp.exe	iexplore.exe
PID 1280 wrote to memory of 1556	1280	tmp.exe	iexplore.exe
PID 1280 wrote to memory of 1556	1280	tmp.exe	iexplore.exe
PID 1280 wrote to memory of 1556	1280	tmp.exe	iexplore.exe
PID 1556 wrote to memory of 848	1556	iexplore.exe	IEXPLORE.EXE
PID 1556 wrote to memory of 848	1556	iexplore.exe	IEXPLORE.EXE
PID 1556 wrote to memory of 848	1556	iexplore.exe	IEXPLORE.EXE
PID 1556 wrote to memory of 848	1556	iexplore.exe	IEXPLORE.EXE
PID 956 wrote to memory of 2008	956	uzk.0.exe	cmd.exe
PID 956 wrote to memory of 2008	956	uzk.0.exe	cmd.exe
PID 956 wrote to memory of 2008	956	uzk.0.exe	cmd.exe
PID 956 wrote to memory of 2008	956	uzk.0.exe	cmd.exe
PID 2008 wrote to memory of 276	2008	cmd.exe	timeout.exe
PID 2008 wrote to memory of 276	2008	cmd.exe	timeout.exe
PID 2008 wrote to memory of 276	2008	cmd.exe	timeout.exe
PID 2008 wrote to memory of 276	2008	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1280

C:\Users\Admin\AppData\Local\Temp\uzk.0.exe
"C:\Users\Admin\AppData\Local\Temp\uzk.0.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:956

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\uzk.0.exe" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:2008

C:\Windows\SysWOW64\timeout.exe
timeout /t 5
4⤵
- Delays execution with timeout.exe
PID:276

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" https://yip.su/2N19t7
2⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1556

C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1556 CREDAT:275457 /prefetch:2
3⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:848

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\uzk.0.exe
Filesize
384KB

MD5
f5e84dd22b31b4141345e57927c70dd2

SHA1
80fe2767854075a9694971485ec371e97a75f944

SHA256
9e72c5e301bee6e112e0a03c826af25cc3eaff8e3749c93efef690643f8324e1

SHA512
03606de1cbcdfb450921d04dfcce8db8b14c1f2a1f4effacb71bcb52448453fcb74e5932c183390670de0be349065f317c1084d36c271fef5f554862bc90b6c4

Download Submit
C:\Users\Admin\AppData\Local\Temp\uzk.0.exe
Filesize
384KB

MD5
f5e84dd22b31b4141345e57927c70dd2

SHA1
80fe2767854075a9694971485ec371e97a75f944

SHA256
9e72c5e301bee6e112e0a03c826af25cc3eaff8e3749c93efef690643f8324e1

SHA512
03606de1cbcdfb450921d04dfcce8db8b14c1f2a1f4effacb71bcb52448453fcb74e5932c183390670de0be349065f317c1084d36c271fef5f554862bc90b6c4

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\4OR66QEA.txt
Filesize
606B

MD5
77d44df9cb7a314a995d5c3d53a95549

SHA1
96f3040d5ac18e303c46c2a51dc856d05a49962c

SHA256
d83557866fedb6d2933ec287de34e952b30ac1b0f8e62bbfb8b5c7d91ee697d2

SHA512
e3dfc067cc52a9f58a587f6bfcb04c6548fc621edcb556c774a52c22188ab2ec2d9bb546300a49e9770e3fff5f8f714a2648b9fe4f2b3ecc317422ab5f754d08

Download Submit
\ProgramData\mozglue.dll
Filesize
133KB

MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
\ProgramData\nss3.dll
Filesize
1.2MB

MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Download Submit
\Users\Admin\AppData\Local\Temp\uzk.0.exe
Filesize
384KB

MD5
f5e84dd22b31b4141345e57927c70dd2

SHA1
80fe2767854075a9694971485ec371e97a75f944

SHA256
9e72c5e301bee6e112e0a03c826af25cc3eaff8e3749c93efef690643f8324e1

SHA512
03606de1cbcdfb450921d04dfcce8db8b14c1f2a1f4effacb71bcb52448453fcb74e5932c183390670de0be349065f317c1084d36c271fef5f554862bc90b6c4

Download Submit
\Users\Admin\AppData\Local\Temp\uzk.0.exe
Filesize
384KB

MD5
f5e84dd22b31b4141345e57927c70dd2

SHA1
80fe2767854075a9694971485ec371e97a75f944

SHA256
9e72c5e301bee6e112e0a03c826af25cc3eaff8e3749c93efef690643f8324e1

SHA512
03606de1cbcdfb450921d04dfcce8db8b14c1f2a1f4effacb71bcb52448453fcb74e5932c183390670de0be349065f317c1084d36c271fef5f554862bc90b6c4

Download Submit
\Users\Admin\AppData\Local\Temp\uzk.0.exe
Filesize
384KB

MD5
f5e84dd22b31b4141345e57927c70dd2

SHA1
80fe2767854075a9694971485ec371e97a75f944

SHA256
9e72c5e301bee6e112e0a03c826af25cc3eaff8e3749c93efef690643f8324e1

SHA512
03606de1cbcdfb450921d04dfcce8db8b14c1f2a1f4effacb71bcb52448453fcb74e5932c183390670de0be349065f317c1084d36c271fef5f554862bc90b6c4

Download Submit
\Users\Admin\AppData\Local\Temp\uzk.0.exe
Filesize
384KB

MD5
f5e84dd22b31b4141345e57927c70dd2

SHA1
80fe2767854075a9694971485ec371e97a75f944

SHA256
9e72c5e301bee6e112e0a03c826af25cc3eaff8e3749c93efef690643f8324e1

SHA512
03606de1cbcdfb450921d04dfcce8db8b14c1f2a1f4effacb71bcb52448453fcb74e5932c183390670de0be349065f317c1084d36c271fef5f554862bc90b6c4

Download Submit
\Users\Admin\AppData\Local\Temp\uzk.0.exe
Filesize
384KB

MD5
f5e84dd22b31b4141345e57927c70dd2

SHA1
80fe2767854075a9694971485ec371e97a75f944

SHA256
9e72c5e301bee6e112e0a03c826af25cc3eaff8e3749c93efef690643f8324e1

SHA512
03606de1cbcdfb450921d04dfcce8db8b14c1f2a1f4effacb71bcb52448453fcb74e5932c183390670de0be349065f317c1084d36c271fef5f554862bc90b6c4

Download Submit
\Users\Admin\AppData\Local\Temp\uzk.1.exe
Filesize
5.3MB

MD5
00e93456aa5bcf9f60f84b0c0760a212

SHA1
6096890893116e75bd46fea0b8c3921ceb33f57d

SHA256
ff3025f9cf19323c5972d14f00f01296d6d7a71547eca7e4016bfd0e1f27b504

SHA512
abd2be819c7d93bd6097155cf84eaf803e3133a7e0ca71f9d9cbc3c65e4e4a26415d2523a36adafdd19b0751e25ea1a99b8d060cad61cdfd1f79adf9cd4b4eca

Download Submit
memory/276-93-0x0000000000000000-mapping.dmp

Download
memory/956-65-0x00000000003A0000-0x00000000003C9000-memory.dmp

Filesize
164KB

Download
memory/956-68-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download
memory/956-66-0x0000000000400000-0x0000000002C7E000-memory.dmp

Filesize
40.5MB

Download
memory/956-89-0x0000000000230000-0x0000000000330000-memory.dmp

Filesize
1024KB

Download
memory/956-90-0x0000000000400000-0x0000000002C7E000-memory.dmp

Filesize
40.5MB

Download
memory/956-92-0x0000000000230000-0x0000000000330000-memory.dmp

Filesize
1024KB

Download
memory/956-94-0x0000000000400000-0x0000000002C7E000-memory.dmp

Filesize
40.5MB

Download
memory/956-64-0x0000000000230000-0x0000000000330000-memory.dmp

Filesize
1024KB

Download
memory/956-60-0x0000000000000000-mapping.dmp

Download
memory/1280-54-0x0000000076181000-0x0000000076183000-memory.dmp

Filesize
8KB

Download
memory/2008-91-0x0000000000000000-mapping.dmp

Download