6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743

Analysis

max time kernel
361s
max time network
370s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
24-11-2022 01:01

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General

Target

6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
Size

255KB
MD5

274110737585bd5300cdbe2b64361de1
SHA1

c9b9baa87260a23197a98c4b108272675a0cba1d
SHA256

6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743
SHA512

020879b5da21669e5513e097b94880a6f1d70b7debcbae55f98bc54f56510f46b59dfa76e5a47d9b61e2e026a4bff1e2d3bfedbe0ad3644f31ba213587652a1c
SSDEEP

3072:MMDb50WrZa8jCgae5+VQkGdUQFDxePZ2SBaQJXkNRtXlNGKaUIQW/qlQBG3mmTJ8:1xlZam+akqx6YQJXcNlEHUIQeE3mmBI5

Score

10^/10

evasion persistence trojan upx

Malware Config

Signatures

Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

Processes:

tbypgoksvf.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	tbypgoksvf.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

Processes:

tbypgoksvf.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	tbypgoksvf.exe

Windows security bypass 2 TTPs 5 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

tbypgoksvf.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	tbypgoksvf.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	tbypgoksvf.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	tbypgoksvf.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	tbypgoksvf.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1"	tbypgoksvf.exe

Disables RegEdit via registry modification 1 IoCs

evasion

Processes:

tbypgoksvf.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	tbypgoksvf.exe

Executes dropped EXE 5 IoCs

Processes:

tbypgoksvf.exeyhjmzaycjjlnnti.exeskrmuzha.exempwwyfznljeby.exeskrmuzha.exe

pid process

5012 tbypgoksvf.exe
4804 yhjmzaycjjlnnti.exe
3540 skrmuzha.exe
2220 mpwwyfznljeby.exe
1452 skrmuzha.exe

pid	process
5012	tbypgoksvf.exe
4804	yhjmzaycjjlnnti.exe
3540	skrmuzha.exe
2220	mpwwyfznljeby.exe
1452	skrmuzha.exe

UPX packed file 19 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4680-132-0x0000000000400000-0x00000000004A0000-memory.dmp	upx
C:\Windows\SysWOW64\tbypgoksvf.exe	upx
C:\Windows\SysWOW64\yhjmzaycjjlnnti.exe	upx
C:\Windows\SysWOW64\skrmuzha.exe	upx
C:\Windows\SysWOW64\mpwwyfznljeby.exe	upx
C:\Windows\SysWOW64\mpwwyfznljeby.exe	upx
C:\Windows\SysWOW64\skrmuzha.exe	upx
C:\Windows\SysWOW64\yhjmzaycjjlnnti.exe	upx
C:\Windows\SysWOW64\tbypgoksvf.exe	upx
behavioral2/memory/5012-145-0x0000000000400000-0x00000000004A0000-memory.dmp	upx
behavioral2/memory/4804-146-0x0000000000400000-0x00000000004A0000-memory.dmp	upx
behavioral2/memory/3540-147-0x0000000000400000-0x00000000004A0000-memory.dmp	upx
behavioral2/memory/2220-148-0x0000000000400000-0x00000000004A0000-memory.dmp	upx
behavioral2/memory/4804-149-0x0000000000400000-0x00000000004A0000-memory.dmp	upx
behavioral2/memory/2220-150-0x0000000000400000-0x00000000004A0000-memory.dmp	upx
C:\Windows\SysWOW64\skrmuzha.exe	upx
behavioral2/memory/1452-153-0x0000000000400000-0x00000000004A0000-memory.dmp	upx
behavioral2/memory/1452-155-0x0000000000400000-0x00000000004A0000-memory.dmp	upx
behavioral2/memory/4680-156-0x0000000000400000-0x00000000004A0000-memory.dmp	upx

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe

Windows security modification 2 TTPs 6 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

tbypgoksvf.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	tbypgoksvf.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	tbypgoksvf.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	tbypgoksvf.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirstRunDisabled = "1"	tbypgoksvf.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	tbypgoksvf.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1"	tbypgoksvf.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

yhjmzaycjjlnnti.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	yhjmzaycjjlnnti.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\peqlnpyf = "tbypgoksvf.exe"	yhjmzaycjjlnnti.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kjahpqss = "yhjmzaycjjlnnti.exe"	yhjmzaycjjlnnti.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ = "mpwwyfznljeby.exe"	yhjmzaycjjlnnti.exe

Enumerates connected drives 3 TTPs 64 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

skrmuzha.exeskrmuzha.exetbypgoksvf.exe

description	ioc	process
File opened (read-only)	\??\b:	skrmuzha.exe
File opened (read-only)	\??\a:	skrmuzha.exe
File opened (read-only)	\??\q:	skrmuzha.exe
File opened (read-only)	\??\t:	skrmuzha.exe
File opened (read-only)	\??\w:	tbypgoksvf.exe
File opened (read-only)	\??\f:	skrmuzha.exe
File opened (read-only)	\??\o:	tbypgoksvf.exe
File opened (read-only)	\??\x:	tbypgoksvf.exe
File opened (read-only)	\??\j:	skrmuzha.exe
File opened (read-only)	\??\n:	tbypgoksvf.exe
File opened (read-only)	\??\u:	tbypgoksvf.exe
File opened (read-only)	\??\h:	skrmuzha.exe
File opened (read-only)	\??\q:	skrmuzha.exe
File opened (read-only)	\??\e:	skrmuzha.exe
File opened (read-only)	\??\k:	skrmuzha.exe
File opened (read-only)	\??\m:	skrmuzha.exe
File opened (read-only)	\??\k:	tbypgoksvf.exe
File opened (read-only)	\??\s:	skrmuzha.exe
File opened (read-only)	\??\n:	skrmuzha.exe
File opened (read-only)	\??\s:	skrmuzha.exe
File opened (read-only)	\??\q:	tbypgoksvf.exe
File opened (read-only)	\??\r:	tbypgoksvf.exe
File opened (read-only)	\??\h:	tbypgoksvf.exe
File opened (read-only)	\??\i:	tbypgoksvf.exe
File opened (read-only)	\??\v:	tbypgoksvf.exe
File opened (read-only)	\??\z:	tbypgoksvf.exe
File opened (read-only)	\??\j:	skrmuzha.exe
File opened (read-only)	\??\w:	skrmuzha.exe
File opened (read-only)	\??\z:	skrmuzha.exe
File opened (read-only)	\??\g:	tbypgoksvf.exe
File opened (read-only)	\??\k:	skrmuzha.exe
File opened (read-only)	\??\v:	skrmuzha.exe
File opened (read-only)	\??\g:	skrmuzha.exe
File opened (read-only)	\??\t:	skrmuzha.exe
File opened (read-only)	\??\x:	skrmuzha.exe
File opened (read-only)	\??\r:	skrmuzha.exe
File opened (read-only)	\??\f:	tbypgoksvf.exe
File opened (read-only)	\??\l:	skrmuzha.exe
File opened (read-only)	\??\u:	skrmuzha.exe
File opened (read-only)	\??\h:	skrmuzha.exe
File opened (read-only)	\??\l:	skrmuzha.exe
File opened (read-only)	\??\j:	tbypgoksvf.exe
File opened (read-only)	\??\p:	skrmuzha.exe
File opened (read-only)	\??\p:	tbypgoksvf.exe
File opened (read-only)	\??\r:	skrmuzha.exe
File opened (read-only)	\??\w:	skrmuzha.exe
File opened (read-only)	\??\z:	skrmuzha.exe
File opened (read-only)	\??\a:	skrmuzha.exe
File opened (read-only)	\??\m:	skrmuzha.exe
File opened (read-only)	\??\v:	skrmuzha.exe
File opened (read-only)	\??\s:	tbypgoksvf.exe
File opened (read-only)	\??\n:	skrmuzha.exe
File opened (read-only)	\??\g:	skrmuzha.exe
File opened (read-only)	\??\o:	skrmuzha.exe
File opened (read-only)	\??\o:	skrmuzha.exe
File opened (read-only)	\??\m:	tbypgoksvf.exe
File opened (read-only)	\??\e:	skrmuzha.exe
File opened (read-only)	\??\u:	skrmuzha.exe
File opened (read-only)	\??\b:	tbypgoksvf.exe
File opened (read-only)	\??\l:	tbypgoksvf.exe
File opened (read-only)	\??\t:	tbypgoksvf.exe
File opened (read-only)	\??\b:	skrmuzha.exe
File opened (read-only)	\??\i:	skrmuzha.exe
File opened (read-only)	\??\a:	tbypgoksvf.exe

Modifies WinLogon 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

tbypgoksvf.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\SFCScan = "0"	tbypgoksvf.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\SFCDisable = "4294967197"	tbypgoksvf.exe

AutoIT Executable 10 IoCs

AutoIT scripts compiled to PE executables.

Processes:

resource	yara_rule
behavioral2/memory/4680-132-0x0000000000400000-0x00000000004A0000-memory.dmp	autoit_exe
behavioral2/memory/5012-145-0x0000000000400000-0x00000000004A0000-memory.dmp	autoit_exe
behavioral2/memory/4804-146-0x0000000000400000-0x00000000004A0000-memory.dmp	autoit_exe
behavioral2/memory/3540-147-0x0000000000400000-0x00000000004A0000-memory.dmp	autoit_exe
behavioral2/memory/2220-148-0x0000000000400000-0x00000000004A0000-memory.dmp	autoit_exe
behavioral2/memory/4804-149-0x0000000000400000-0x00000000004A0000-memory.dmp	autoit_exe
behavioral2/memory/2220-150-0x0000000000400000-0x00000000004A0000-memory.dmp	autoit_exe
behavioral2/memory/1452-153-0x0000000000400000-0x00000000004A0000-memory.dmp	autoit_exe
behavioral2/memory/1452-155-0x0000000000400000-0x00000000004A0000-memory.dmp	autoit_exe
behavioral2/memory/4680-156-0x0000000000400000-0x00000000004A0000-memory.dmp	autoit_exe

Drops file in System32 directory 9 IoCs

Processes:

6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exetbypgoksvf.exe

description	ioc	process
File created	C:\Windows\SysWOW64\yhjmzaycjjlnnti.exe	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
File opened for modification	C:\Windows\SysWOW64\skrmuzha.exe	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
File opened for modification	C:\Windows\SysWOW64\mpwwyfznljeby.exe	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
File opened for modification	C:\Windows\SysWOW64\msvbvm60.dll	tbypgoksvf.exe
File created	C:\Windows\SysWOW64\tbypgoksvf.exe	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
File opened for modification	C:\Windows\SysWOW64\tbypgoksvf.exe	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
File opened for modification	C:\Windows\SysWOW64\yhjmzaycjjlnnti.exe	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
File created	C:\Windows\SysWOW64\skrmuzha.exe	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
File created	C:\Windows\SysWOW64\mpwwyfznljeby.exe	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe

Drops file in Windows directory 1 IoCs

Processes:

6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe

description ioc process

File opened for modification C:\Windows\mydoc.rtf 6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	ioc	process
File opened for modification	C:\Windows\mydoc.rtf	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe

Modifies registry class 20 IoCs

Processes:

tbypgoksvf.exe6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.wsf	tbypgoksvf.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLV.Classes\Com3 = "2EB1B121449739EF52CBB9A7329DD7BC"	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLV.Classes\StartCom1 = "E0F16BB0FF1C21ABD27ED1D58B099117"	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.WSH\ = "txtfile"	tbypgoksvf.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.wsc\ = "txtfile"	tbypgoksvf.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.vbs\ = "txtfile"	tbypgoksvf.exe
Key created	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000_Classes\Local Settings	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLV.Classes\StartCom2 = "184BC67B15E3DAB3B9BB7FE5ECE437CA"	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.bat\ = "txtfile"	tbypgoksvf.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.wsc	tbypgoksvf.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.vbs	tbypgoksvf.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.reg\ = "txtfile"	tbypgoksvf.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLV.Classes\Com2 = "6BBCFABCF967F194847A3B4081EB3992B0FC02FE4364034EE1BF459D08A3"	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.bat	tbypgoksvf.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.WSF\ = "txtfile"	tbypgoksvf.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.reg	tbypgoksvf.exe
Key created	\REGISTRY\MACHINE\Software\Classes\CLV.Classes	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLV.Classes\Com1 = "32472C7A9D2082246A4476A670562DDD7CF164DF"	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLV.Classes\Com4 = "7EFCFCFE4F27826F9031D7217EE6BDE3E147593667426345D69D"	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.wsh	tbypgoksvf.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exetbypgoksvf.exeyhjmzaycjjlnnti.exempwwyfznljeby.exeskrmuzha.exe

pid	process
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
5012	tbypgoksvf.exe
5012	tbypgoksvf.exe
5012	tbypgoksvf.exe
5012	tbypgoksvf.exe
4804	yhjmzaycjjlnnti.exe
4804	yhjmzaycjjlnnti.exe
5012	tbypgoksvf.exe
5012	tbypgoksvf.exe
4804	yhjmzaycjjlnnti.exe
4804	yhjmzaycjjlnnti.exe
5012	tbypgoksvf.exe
5012	tbypgoksvf.exe
4804	yhjmzaycjjlnnti.exe
4804	yhjmzaycjjlnnti.exe
4804	yhjmzaycjjlnnti.exe
4804	yhjmzaycjjlnnti.exe
5012	tbypgoksvf.exe
5012	tbypgoksvf.exe
4804	yhjmzaycjjlnnti.exe
4804	yhjmzaycjjlnnti.exe
2220	mpwwyfznljeby.exe
3540	skrmuzha.exe
2220	mpwwyfznljeby.exe
3540	skrmuzha.exe
2220	mpwwyfznljeby.exe
2220	mpwwyfznljeby.exe
3540	skrmuzha.exe
3540	skrmuzha.exe
2220	mpwwyfznljeby.exe
2220	mpwwyfznljeby.exe
3540	skrmuzha.exe
3540	skrmuzha.exe
2220	mpwwyfznljeby.exe
2220	mpwwyfznljeby.exe
3540	skrmuzha.exe
3540	skrmuzha.exe
2220	mpwwyfznljeby.exe
2220	mpwwyfznljeby.exe
2220	mpwwyfznljeby.exe
2220	mpwwyfznljeby.exe
4804	yhjmzaycjjlnnti.exe
4804	yhjmzaycjjlnnti.exe
2220	mpwwyfznljeby.exe
2220	mpwwyfznljeby.exe
2220	mpwwyfznljeby.exe
2220	mpwwyfznljeby.exe
4804	yhjmzaycjjlnnti.exe
4804	yhjmzaycjjlnnti.exe

Suspicious use of FindShellTrayWindow 19 IoCs

Processes:

6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exetbypgoksvf.exeyhjmzaycjjlnnti.exeskrmuzha.exempwwyfznljeby.exeskrmuzha.exe

pid	process
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
5012	tbypgoksvf.exe
5012	tbypgoksvf.exe
5012	tbypgoksvf.exe
4804	yhjmzaycjjlnnti.exe
4804	yhjmzaycjjlnnti.exe
4804	yhjmzaycjjlnnti.exe
3540	skrmuzha.exe
3540	skrmuzha.exe
3540	skrmuzha.exe
2220	mpwwyfznljeby.exe
2220	mpwwyfznljeby.exe
2220	mpwwyfznljeby.exe
1452	skrmuzha.exe
1452	skrmuzha.exe
1452	skrmuzha.exe

Suspicious use of SendNotifyMessage 19 IoCs

Processes:

6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exetbypgoksvf.exeyhjmzaycjjlnnti.exeskrmuzha.exempwwyfznljeby.exeskrmuzha.exe

pid	process
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
5012	tbypgoksvf.exe
5012	tbypgoksvf.exe
5012	tbypgoksvf.exe
4804	yhjmzaycjjlnnti.exe
4804	yhjmzaycjjlnnti.exe
4804	yhjmzaycjjlnnti.exe
3540	skrmuzha.exe
3540	skrmuzha.exe
3540	skrmuzha.exe
2220	mpwwyfznljeby.exe
2220	mpwwyfznljeby.exe
2220	mpwwyfznljeby.exe
1452	skrmuzha.exe
1452	skrmuzha.exe
1452	skrmuzha.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exetbypgoksvf.exe

description	pid	process	target process
PID 4680 wrote to memory of 5012	4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe	tbypgoksvf.exe
PID 4680 wrote to memory of 5012	4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe	tbypgoksvf.exe
PID 4680 wrote to memory of 5012	4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe	tbypgoksvf.exe
PID 4680 wrote to memory of 4804	4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe	yhjmzaycjjlnnti.exe
PID 4680 wrote to memory of 4804	4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe	yhjmzaycjjlnnti.exe
PID 4680 wrote to memory of 4804	4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe	yhjmzaycjjlnnti.exe
PID 4680 wrote to memory of 3540	4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe	skrmuzha.exe
PID 4680 wrote to memory of 3540	4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe	skrmuzha.exe
PID 4680 wrote to memory of 3540	4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe	skrmuzha.exe
PID 4680 wrote to memory of 2220	4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe	mpwwyfznljeby.exe
PID 4680 wrote to memory of 2220	4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe	mpwwyfznljeby.exe
PID 4680 wrote to memory of 2220	4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe	mpwwyfznljeby.exe
PID 5012 wrote to memory of 1452	5012	tbypgoksvf.exe	skrmuzha.exe
PID 5012 wrote to memory of 1452	5012	tbypgoksvf.exe	skrmuzha.exe
PID 5012 wrote to memory of 1452	5012	tbypgoksvf.exe	skrmuzha.exe
PID 4680 wrote to memory of 4252	4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe	WINWORD.EXE
PID 4680 wrote to memory of 4252	4680	6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe	WINWORD.EXE

C:\Users\Admin\AppData\Local\Temp\6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe
"C:\Users\Admin\AppData\Local\Temp\6a2bef16e94b21793b461a1a87774dc0c647cbe561e029b4bc3bc0a8a7189743.exe"
1⤵
- Checks computer location settings
- Drops file in System32 directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4680

C:\Windows\SysWOW64\tbypgoksvf.exe
tbypgoksvf.exe
2⤵
- Modifies visibility of file extensions in Explorer
- Modifies visiblity of hidden/system files in Explorer
- Windows security bypass
- Disables RegEdit via registry modification
- Executes dropped EXE
- Windows security modification
- Enumerates connected drives
- Modifies WinLogon
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:5012

C:\Windows\SysWOW64\skrmuzha.exe
C:\Windows\system32\skrmuzha.exe
3⤵
- Executes dropped EXE
- Enumerates connected drives
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:1452

C:\Windows\SysWOW64\yhjmzaycjjlnnti.exe
yhjmzaycjjlnnti.exe
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:4804

C:\Windows\SysWOW64\skrmuzha.exe
skrmuzha.exe
2⤵
- Executes dropped EXE
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:3540

C:\Windows\SysWOW64\mpwwyfznljeby.exe
mpwwyfznljeby.exe
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:2220

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Windows\mydoc.rtf" /o ""
2⤵
PID:4252

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

Disabling Security Tools

T1089

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Peripheral Device Discovery

T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\mpwwyfznljeby.exe
Filesize
255KB

MD5
4c08ee058c6a864e66d44de39d5130fc

SHA1
bc2999349e73931afb49bbc3b5aa7f6103f300aa

SHA256
4186907320c6ce2d4855b5f97f4f5c19508a406c0761331018e5e28bdca62273

SHA512
e98cc7537b3176aa9de6e22944d3c7105d50760068b1784f11f4edebb5a313064780a0243eab70b3d30092a3f93909a316e68d8709f126ab28269a5028eb8b09

Download Submit
C:\Windows\SysWOW64\mpwwyfznljeby.exe
Filesize
255KB

MD5
4c08ee058c6a864e66d44de39d5130fc

SHA1
bc2999349e73931afb49bbc3b5aa7f6103f300aa

SHA256
4186907320c6ce2d4855b5f97f4f5c19508a406c0761331018e5e28bdca62273

SHA512
e98cc7537b3176aa9de6e22944d3c7105d50760068b1784f11f4edebb5a313064780a0243eab70b3d30092a3f93909a316e68d8709f126ab28269a5028eb8b09

Download Submit
C:\Windows\SysWOW64\skrmuzha.exe
Filesize
255KB

MD5
170123e3bc8027ceff097fa2f382eb85

SHA1
f1baa224f97faf3796dcb62e107c3aa3c0849da0

SHA256
ca7152d1b9c36a9dec9aa802d7989715c1576b4a0e655784ab6b0dcc44248a8c

SHA512
211b31c796a80af15d5a4aa31c9ec7f7b6a03643d4902a4a53317617c3be7f0857d990a126e58aa718bbfc17fdc2c1b6868a172b726bdac2d9c4d176800a7e0c

Download Submit
C:\Windows\SysWOW64\skrmuzha.exe
Filesize
255KB

MD5
170123e3bc8027ceff097fa2f382eb85

SHA1
f1baa224f97faf3796dcb62e107c3aa3c0849da0

SHA256
ca7152d1b9c36a9dec9aa802d7989715c1576b4a0e655784ab6b0dcc44248a8c

SHA512
211b31c796a80af15d5a4aa31c9ec7f7b6a03643d4902a4a53317617c3be7f0857d990a126e58aa718bbfc17fdc2c1b6868a172b726bdac2d9c4d176800a7e0c

Download Submit
C:\Windows\SysWOW64\skrmuzha.exe
Filesize
255KB

MD5
170123e3bc8027ceff097fa2f382eb85

SHA1
f1baa224f97faf3796dcb62e107c3aa3c0849da0

SHA256
ca7152d1b9c36a9dec9aa802d7989715c1576b4a0e655784ab6b0dcc44248a8c

SHA512
211b31c796a80af15d5a4aa31c9ec7f7b6a03643d4902a4a53317617c3be7f0857d990a126e58aa718bbfc17fdc2c1b6868a172b726bdac2d9c4d176800a7e0c

Download Submit
C:\Windows\SysWOW64\tbypgoksvf.exe
Filesize
255KB

MD5
ef09e5c80a0221addeecd54361dbcc1a

SHA1
c810fdce37fdb8aa76ef16235dd9e2b87ce337fa

SHA256
9a5effc15a62b4d351a77758f207f122fb42fff38293e7d3fe3bef621010b47b

SHA512
31c53c5e09581064965199f5ecffeba295a09d3aaf62a7c06252063eccb3beeba09631542b47f3942bd92cc8e049078564887f8d83fcff9f4ad6c093711bb001

Download Submit
C:\Windows\SysWOW64\tbypgoksvf.exe
Filesize
255KB

MD5
ef09e5c80a0221addeecd54361dbcc1a

SHA1
c810fdce37fdb8aa76ef16235dd9e2b87ce337fa

SHA256
9a5effc15a62b4d351a77758f207f122fb42fff38293e7d3fe3bef621010b47b

SHA512
31c53c5e09581064965199f5ecffeba295a09d3aaf62a7c06252063eccb3beeba09631542b47f3942bd92cc8e049078564887f8d83fcff9f4ad6c093711bb001

Download Submit
C:\Windows\SysWOW64\yhjmzaycjjlnnti.exe
Filesize
255KB

MD5
d3c7950214c7a77253dadfa0fbbadbc8

SHA1
93f41c99d165b5a2ed13d207eaa185b1deffcc58

SHA256
e08afe8d71a7ed1cae1ca81e5f4620e1523b4eebaca2669e2ed80a7b17142b09

SHA512
5b441dc7ab5b142e23b87725e34ba0169467325cea3b81207b69b10713fc9e26569340497901c5dee639ea11bb30e6e281e75a93d884e7a74c5292a7089da673

Download Submit
C:\Windows\SysWOW64\yhjmzaycjjlnnti.exe
Filesize
255KB

MD5
d3c7950214c7a77253dadfa0fbbadbc8

SHA1
93f41c99d165b5a2ed13d207eaa185b1deffcc58

SHA256
e08afe8d71a7ed1cae1ca81e5f4620e1523b4eebaca2669e2ed80a7b17142b09

SHA512
5b441dc7ab5b142e23b87725e34ba0169467325cea3b81207b69b10713fc9e26569340497901c5dee639ea11bb30e6e281e75a93d884e7a74c5292a7089da673

Download Submit
memory/1452-155-0x0000000000400000-0x00000000004A0000-memory.dmp

Filesize
640KB

Download
memory/1452-151-0x0000000000000000-mapping.dmp

Download
memory/1452-153-0x0000000000400000-0x00000000004A0000-memory.dmp

Filesize
640KB

Download
memory/2220-150-0x0000000000400000-0x00000000004A0000-memory.dmp

Filesize
640KB

Download
memory/2220-142-0x0000000000000000-mapping.dmp

Download
memory/2220-148-0x0000000000400000-0x00000000004A0000-memory.dmp

Filesize
640KB

Download
memory/3540-139-0x0000000000000000-mapping.dmp

Download
memory/3540-147-0x0000000000400000-0x00000000004A0000-memory.dmp

Filesize
640KB

Download
memory/4252-154-0x0000000000000000-mapping.dmp

Download
memory/4680-156-0x0000000000400000-0x00000000004A0000-memory.dmp

Filesize
640KB

Download
memory/4680-132-0x0000000000400000-0x00000000004A0000-memory.dmp

Filesize
640KB

Download
memory/4804-146-0x0000000000400000-0x00000000004A0000-memory.dmp

Filesize
640KB

Download
memory/4804-149-0x0000000000400000-0x00000000004A0000-memory.dmp

Filesize
640KB

Download
memory/4804-136-0x0000000000000000-mapping.dmp

Download
memory/5012-145-0x0000000000400000-0x00000000004A0000-memory.dmp

Filesize
640KB

Download
memory/5012-133-0x0000000000000000-mapping.dmp

Download