arkei | d080f227320c4939dd03587024c17583d8fe7b589e45502f8ee905ecb33d626a

Analysis

max time kernel
99s
max time network
141s
platform
windows7_x64
resource
win7-20220414-en
submitted
26-06-2022 05:22

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

boomclnr.exe
Size

338KB
MD5

7eb3288cf5a21f9e579741af49ce65aa
SHA1

15ee11f73dd90eb20e5dcca2ad8fac94f93a91c1
SHA256

d080f227320c4939dd03587024c17583d8fe7b589e45502f8ee905ecb33d626a
SHA512

e733a472ed1c2d3e848fc12eaab52a877a4e81382bba85674d061b0e34060186377e5399b9d67596fca1fe0813d1c960a851702abbac015955bc18df7cc5012a

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:

uf8.0.exe

pid process

956 uf8.0.exe
Loads dropped DLL 7 IoCs

Processes:

boomclnr.exeuf8.0.exe

pid process

548 boomclnr.exe
548 boomclnr.exe
548 boomclnr.exe
548 boomclnr.exe
548 boomclnr.exe
956 uf8.0.exe
956 uf8.0.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	uf8.0.exe

pid	process
548	boomclnr.exe
548	boomclnr.exe
548	boomclnr.exe
548	boomclnr.exe
548	boomclnr.exe
956	uf8.0.exe
956	uf8.0.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:

uf8.0.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	uf8.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	uf8.0.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1672 timeout.exe

pid	process
1672	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\InternetRegistry	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
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	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
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\BrowserEmulation\LowMic	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\LowRegistry\DOMStorage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	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 (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\DomainSuggestion\FileNames	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\IntelliForms	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb010000004863fcdc101a3947b120786fa95ba35b000000000200000000001066000000010000200000002bb0ff63bf7bc01890226fbb10c380a85b7bdd138560e6ec0b56b103c1d35b06000000000e800000000200002000000038b3623238d713c2f0bea23704d53171a2a1b9f08704f1c749a7963da69fe146200000003a970ec3d9e53ac0dc902928aecda0a5de896b64c0bbf8d1f5a252714c1cbdd14000000088bb34de8a6e6d1e7e90f14d4195225919a083703945ce871f7e65f0d553f80389c32ad8c11a1bd634d24c33e1bab54621f5c89617126410dd94b347a396057e	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Zoom	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
Set value (data)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = 404824ec1c89d801	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\IETld\LowMic	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
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	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\TabbedBrowsing	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "362985967"	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	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{127C7941-F510-11EC-8749-4224C87335A1} = "0"	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\TabbedBrowsing\NewTabPage	iexplore.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

iexplore.exe

pid process

1432 iexplore.exe
Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

iexplore.exeIEXPLORE.EXE

pid process

1432 iexplore.exe
1432 iexplore.exe
1808 IEXPLORE.EXE
1808 IEXPLORE.EXE
1808 IEXPLORE.EXE
1808 IEXPLORE.EXE

pid	process
1432	iexplore.exe

pid	process
1432	iexplore.exe
1432	iexplore.exe
1808	IEXPLORE.EXE
1808	IEXPLORE.EXE
1808	IEXPLORE.EXE
1808	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

boomclnr.exeiexplore.exeuf8.0.exe

description	pid	process	target process
PID 548 wrote to memory of 956	548	boomclnr.exe	uf8.0.exe
PID 548 wrote to memory of 956	548	boomclnr.exe	uf8.0.exe
PID 548 wrote to memory of 956	548	boomclnr.exe	uf8.0.exe
PID 548 wrote to memory of 956	548	boomclnr.exe	uf8.0.exe
PID 548 wrote to memory of 1432	548	boomclnr.exe	iexplore.exe
PID 548 wrote to memory of 1432	548	boomclnr.exe	iexplore.exe
PID 548 wrote to memory of 1432	548	boomclnr.exe	iexplore.exe
PID 548 wrote to memory of 1432	548	boomclnr.exe	iexplore.exe
PID 1432 wrote to memory of 1808	1432	iexplore.exe	IEXPLORE.EXE
PID 1432 wrote to memory of 1808	1432	iexplore.exe	IEXPLORE.EXE
PID 1432 wrote to memory of 1808	1432	iexplore.exe	IEXPLORE.EXE
PID 1432 wrote to memory of 1808	1432	iexplore.exe	IEXPLORE.EXE
PID 956 wrote to memory of 1512	956	uf8.0.exe	cmd.exe
PID 956 wrote to memory of 1512	956	uf8.0.exe	cmd.exe
PID 956 wrote to memory of 1512	956	uf8.0.exe	cmd.exe
PID 956 wrote to memory of 1512	956	uf8.0.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\boomclnr.exe
"C:\Users\Admin\AppData\Local\Temp\boomclnr.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:548

C:\Users\Admin\AppData\Local\Temp\uf8.0.exe
"C:\Users\Admin\AppData\Local\Temp\uf8.0.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\uf8.0.exe" & exit
3⤵
PID:1512

C:\Windows\SysWOW64\timeout.exe
timeout /t 5
4⤵
- Delays execution with timeout.exe
PID:1672

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:1432

C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1432 CREDAT:275457 /prefetch:2
3⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:1808

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\uf8.0.exe
Filesize
353KB

MD5
b4313a7d7629f36f75f7c964cddb407a

SHA1
b6067c17671743fb93d4783e7925b1c24393e0ac

SHA256
5d2852480a44eed596c7211a6eab77bee91653293aacbd39d4f47b45946740c2

SHA512
7dfeee2affd3f5a71abe63d5c866b29c36373683fb7ca5b4ce8e4fc0d122dc64ce4fe0a3e252c3fbd8a9b59b90e8af9a627c25fcc9fe1991444a4b15c2332e21

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\BD7RXBDA.txt
Filesize
605B

MD5
628677adca676b684eccb5f05cd6eef9

SHA1
07730088fa67c611da0d3123072320592f833085

SHA256
a70fb7021efdd93164fdbe3f2188b716e12ca92513af7139d74ecfad711bab4e

SHA512
2ad9e7224bbea615a59353f62648e9844aaa21ee4ed5e28cebd61ce46190fe033729cc047b8dd20eaa925110943da86a5fd785e9601533c68b37f3e8deb1d88e

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\uf8.0.exe
Filesize
353KB

MD5
b4313a7d7629f36f75f7c964cddb407a

SHA1
b6067c17671743fb93d4783e7925b1c24393e0ac

SHA256
5d2852480a44eed596c7211a6eab77bee91653293aacbd39d4f47b45946740c2

SHA512
7dfeee2affd3f5a71abe63d5c866b29c36373683fb7ca5b4ce8e4fc0d122dc64ce4fe0a3e252c3fbd8a9b59b90e8af9a627c25fcc9fe1991444a4b15c2332e21

Download Submit
\Users\Admin\AppData\Local\Temp\uf8.0.exe
Filesize
353KB

MD5
b4313a7d7629f36f75f7c964cddb407a

SHA1
b6067c17671743fb93d4783e7925b1c24393e0ac

SHA256
5d2852480a44eed596c7211a6eab77bee91653293aacbd39d4f47b45946740c2

SHA512
7dfeee2affd3f5a71abe63d5c866b29c36373683fb7ca5b4ce8e4fc0d122dc64ce4fe0a3e252c3fbd8a9b59b90e8af9a627c25fcc9fe1991444a4b15c2332e21

Download Submit
\Users\Admin\AppData\Local\Temp\uf8.0.exe
Filesize
353KB

MD5
b4313a7d7629f36f75f7c964cddb407a

SHA1
b6067c17671743fb93d4783e7925b1c24393e0ac

SHA256
5d2852480a44eed596c7211a6eab77bee91653293aacbd39d4f47b45946740c2

SHA512
7dfeee2affd3f5a71abe63d5c866b29c36373683fb7ca5b4ce8e4fc0d122dc64ce4fe0a3e252c3fbd8a9b59b90e8af9a627c25fcc9fe1991444a4b15c2332e21

Download Submit
\Users\Admin\AppData\Local\Temp\uf8.0.exe
Filesize
353KB

MD5
b4313a7d7629f36f75f7c964cddb407a

SHA1
b6067c17671743fb93d4783e7925b1c24393e0ac

SHA256
5d2852480a44eed596c7211a6eab77bee91653293aacbd39d4f47b45946740c2

SHA512
7dfeee2affd3f5a71abe63d5c866b29c36373683fb7ca5b4ce8e4fc0d122dc64ce4fe0a3e252c3fbd8a9b59b90e8af9a627c25fcc9fe1991444a4b15c2332e21

Download Submit
\Users\Admin\AppData\Local\Temp\uf8.1.exe
Filesize
5.3MB

MD5
00e93456aa5bcf9f60f84b0c0760a212

SHA1
6096890893116e75bd46fea0b8c3921ceb33f57d

SHA256
ff3025f9cf19323c5972d14f00f01296d6d7a71547eca7e4016bfd0e1f27b504

SHA512
abd2be819c7d93bd6097155cf84eaf803e3133a7e0ca71f9d9cbc3c65e4e4a26415d2523a36adafdd19b0751e25ea1a99b8d060cad61cdfd1f79adf9cd4b4eca

Download Submit
memory/548-54-0x0000000076181000-0x0000000076183000-memory.dmp

Filesize
8KB

Download
memory/956-62-0x0000000000BF8000-0x0000000000C19000-memory.dmp

Filesize
132KB

Download
memory/956-65-0x0000000000400000-0x0000000000B4B000-memory.dmp

Filesize
7.3MB

Download
memory/956-67-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download
memory/956-64-0x00000000002C0000-0x00000000002E9000-memory.dmp

Filesize
164KB

Download
memory/956-63-0x0000000000BF8000-0x0000000000C19000-memory.dmp

Filesize
132KB

Download
memory/956-89-0x0000000000BF8000-0x0000000000C19000-memory.dmp

Filesize
132KB

Download
memory/956-90-0x0000000000400000-0x0000000000B4B000-memory.dmp

Filesize
7.3MB

Download
memory/956-59-0x0000000000000000-mapping.dmp

Download
memory/1512-88-0x0000000000000000-mapping.dmp

Download