5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e

Analysis

max time kernel
149s
max time network
192s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
23-11-2022 14:18

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General

Target

5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe
Size

452KB
MD5

a7199d2ff40258ac7427ce9b513fe3fe
SHA1

a9eecc7ad31d4d57cb6ff57b1588f18e4830bcc2
SHA256

5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e
SHA512

26a5d17a002f5c4b5c6019d29d4c45516a204df86f2c9d1f5495219ab6baacd77643075915a839053058cbbd3ed547c43cd9228698e31975536144e0da4df8ae
SSDEEP

12288:rj93DcSMTXXAi7bCqoEozFGPCUo0G9o5/AWZn+j:9TXri7bNoFzwPCUor9KVEj

Score

9^/10

evasion persistence ransomware

Malware Config

Signatures

Modifies boot configuration data using bcdedit 1 TTPs 10 IoCs

ransomware evasion

Inhibit System Recovery

T1490

Processes:

bcdedit.exebcdedit.exebcdedit.exebcdedit.exebcdedit.exebcdedit.exebcdedit.exebcdedit.exebcdedit.exebcdedit.exe

pid	process
320	bcdedit.exe
664	bcdedit.exe
568	bcdedit.exe
1320	bcdedit.exe
888	bcdedit.exe
1864	bcdedit.exe
1420	bcdedit.exe
1416	bcdedit.exe
608	bcdedit.exe
292	bcdedit.exe

Drops file in Drivers directory 1 IoCs

Processes:

koti.exe

description ioc process

File created C:\Windows\system32\drivers\6d44ed.sys koti.exe
Executes dropped EXE 1 IoCs

Processes:

koti.exe

pid process

620 koti.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1668 cmd.exe

description	ioc	process
File created	C:\Windows\system32\drivers\6d44ed.sys	koti.exe

pid	process
620	koti.exe

pid	process
1668	cmd.exe

Loads dropped DLL 2 IoCs

Processes:

5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe

pid	process
1636	5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe
1636	5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

koti.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\Koti = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Ohijru\\koti.exe"	koti.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run	koti.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe

description	pid	process	target process
PID 1636 set thread context of 1668	1636	5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe	cmd.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

koti.exe5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	koti.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

Processes:

5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exekoti.exe

pid	process
1636	5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe
620	koti.exe
620	koti.exe
620	koti.exe
620	koti.exe
620	koti.exe
620	koti.exe
620	koti.exe
620	koti.exe
620	koti.exe
620	koti.exe
620	koti.exe
620	koti.exe
620	koti.exe
620	koti.exe
620	koti.exe
620	koti.exe

Suspicious behavior: LoadsDriver 1 IoCs

Processes:

pid process

468
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

koti.exe

description pid process

Token: SeShutdownPrivilege 620 koti.exe

pid	process
468

description	pid	process
Token: SeShutdownPrivilege	620	koti.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exekoti.exe

description	pid	process	target process
PID 1636 wrote to memory of 620	1636	5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe	koti.exe
PID 1636 wrote to memory of 620	1636	5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe	koti.exe
PID 1636 wrote to memory of 620	1636	5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe	koti.exe
PID 1636 wrote to memory of 620	1636	5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe	koti.exe
PID 620 wrote to memory of 320	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 320	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 320	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 320	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 664	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 664	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 664	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 664	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 568	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 568	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 568	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 568	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 1320	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 1320	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 1320	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 1320	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 888	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 888	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 888	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 888	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 1864	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 1864	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 1864	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 1864	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 1420	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 1420	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 1420	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 1420	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 1416	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 1416	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 1416	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 1416	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 292	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 292	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 292	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 292	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 608	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 608	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 608	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 608	620	koti.exe	bcdedit.exe
PID 620 wrote to memory of 1120	620	koti.exe	taskhost.exe
PID 620 wrote to memory of 1120	620	koti.exe	taskhost.exe
PID 620 wrote to memory of 1120	620	koti.exe	taskhost.exe
PID 620 wrote to memory of 1120	620	koti.exe	taskhost.exe
PID 620 wrote to memory of 1120	620	koti.exe	taskhost.exe
PID 620 wrote to memory of 1200	620	koti.exe	Dwm.exe
PID 620 wrote to memory of 1200	620	koti.exe	Dwm.exe
PID 620 wrote to memory of 1200	620	koti.exe	Dwm.exe
PID 620 wrote to memory of 1200	620	koti.exe	Dwm.exe
PID 620 wrote to memory of 1200	620	koti.exe	Dwm.exe
PID 620 wrote to memory of 1244	620	koti.exe	Explorer.EXE
PID 620 wrote to memory of 1244	620	koti.exe	Explorer.EXE
PID 620 wrote to memory of 1244	620	koti.exe	Explorer.EXE
PID 620 wrote to memory of 1244	620	koti.exe	Explorer.EXE
PID 620 wrote to memory of 1244	620	koti.exe	Explorer.EXE
PID 620 wrote to memory of 1636	620	koti.exe	5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe
PID 620 wrote to memory of 1636	620	koti.exe	5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe
PID 620 wrote to memory of 1636	620	koti.exe	5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe
PID 620 wrote to memory of 1636	620	koti.exe	5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe
PID 620 wrote to memory of 1636	620	koti.exe	5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe

C:\Windows\system32\taskhost.exe
"taskhost.exe"
1⤵
PID:1120

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1200

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1244

C:\Users\Admin\AppData\Local\Temp\5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe
"C:\Users\Admin\AppData\Local\Temp\5498945d745d09948fd4328f7da6d71ae442e0e80242dd5f66a247e30d40a22e.exe"
2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1636

C:\Users\Admin\AppData\Local\Temp\Ohijru\koti.exe
"C:\Users\Admin\AppData\Local\Temp\Ohijru\koti.exe"
3⤵
- Drops file in Drivers directory
- Executes dropped EXE
- Adds Run key to start application
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:620

C:\Windows\system32\bcdedit.exe
bcdedit.exe -set TESTSIGNING ON
4⤵
- Modifies boot configuration data using bcdedit
PID:320

C:\Windows\system32\bcdedit.exe
bcdedit.exe -set TESTSIGNING ON
4⤵
- Modifies boot configuration data using bcdedit
PID:664

C:\Windows\system32\bcdedit.exe
bcdedit.exe -set TESTSIGNING ON
4⤵
- Modifies boot configuration data using bcdedit
PID:568

C:\Windows\system32\bcdedit.exe
bcdedit.exe -set TESTSIGNING ON
4⤵
- Modifies boot configuration data using bcdedit
PID:1320

C:\Windows\system32\bcdedit.exe
bcdedit.exe -set TESTSIGNING ON
4⤵
- Modifies boot configuration data using bcdedit
PID:888

C:\Windows\system32\bcdedit.exe
bcdedit.exe -set TESTSIGNING ON
4⤵
- Modifies boot configuration data using bcdedit
PID:1864

C:\Windows\system32\bcdedit.exe
bcdedit.exe -set TESTSIGNING ON
4⤵
- Modifies boot configuration data using bcdedit
PID:1420

C:\Windows\system32\bcdedit.exe
bcdedit.exe -set TESTSIGNING ON
4⤵
- Modifies boot configuration data using bcdedit
PID:1416

C:\Windows\system32\bcdedit.exe
bcdedit.exe -set TESTSIGNING ON
4⤵
- Modifies boot configuration data using bcdedit
PID:608

C:\Windows\system32\bcdedit.exe
bcdedit.exe -set TESTSIGNING ON
4⤵
- Modifies boot configuration data using bcdedit
PID:292

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\QOT771F.bat"
3⤵
- Deletes itself
PID:1668

C:\Windows\system32\conhost.exe
\??\C:\Windows\system32\conhost.exe "1626924549-421475575-1299951291-2765498671666563903-1687036756-16512369821857716997"
1⤵
PID:1732

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0
1⤵
PID:1948

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x1
1⤵
PID:796

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

T1490

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\Ohijru\koti.exe

Filesize
452KB

MD5
19fb06e3c09563f1293d8afc87e9ae54

SHA1
6da3550f0ff28d3e4c069cf63837dda324c1ca2f

SHA256
3c16dc649ffd12bb7a1c40ca8e8be5d6407a2eb52fddd212bd46f24a830fbbfb

SHA512
8f197610a6886987354f30f7279a995c536dff961649daa3df42e0267fd2a99aae74588eb296a929d9ce30d4073a063bb719bff8decf633d480b60b053aa9eb6

Download Submit
C:\Users\Admin\AppData\Local\Temp\Ohijru\koti.exe

Filesize
452KB

MD5
19fb06e3c09563f1293d8afc87e9ae54

SHA1
6da3550f0ff28d3e4c069cf63837dda324c1ca2f

SHA256
3c16dc649ffd12bb7a1c40ca8e8be5d6407a2eb52fddd212bd46f24a830fbbfb

SHA512
8f197610a6886987354f30f7279a995c536dff961649daa3df42e0267fd2a99aae74588eb296a929d9ce30d4073a063bb719bff8decf633d480b60b053aa9eb6

Download Submit
C:\Users\Admin\AppData\Local\Temp\QOT771F.bat

Filesize
280B

MD5
fcc788819614660fd1c4277c0e0458a8

SHA1
34daeef7f35deb374c88ab99f46bd7f6a082997a

SHA256
24d66544138baddce4b8cf8d368efa985badba3c6be28c538d90df7fa8cb6efe

SHA512
df789cb51683608f6c39a06cf05145a5bd2ddf9b35d2ae484f6455b490639137f9a5d077a482668ceeb2a86aac5a1d8261d64f55fc262d53d0d2319d3667777e

Download Submit
\Users\Admin\AppData\Local\Temp\Ohijru\koti.exe

Filesize
452KB

MD5
19fb06e3c09563f1293d8afc87e9ae54

SHA1
6da3550f0ff28d3e4c069cf63837dda324c1ca2f

SHA256
3c16dc649ffd12bb7a1c40ca8e8be5d6407a2eb52fddd212bd46f24a830fbbfb

SHA512
8f197610a6886987354f30f7279a995c536dff961649daa3df42e0267fd2a99aae74588eb296a929d9ce30d4073a063bb719bff8decf633d480b60b053aa9eb6

Download Submit
\Users\Admin\AppData\Local\Temp\Ohijru\koti.exe

Filesize
452KB

MD5
19fb06e3c09563f1293d8afc87e9ae54

SHA1
6da3550f0ff28d3e4c069cf63837dda324c1ca2f

SHA256
3c16dc649ffd12bb7a1c40ca8e8be5d6407a2eb52fddd212bd46f24a830fbbfb

SHA512
8f197610a6886987354f30f7279a995c536dff961649daa3df42e0267fd2a99aae74588eb296a929d9ce30d4073a063bb719bff8decf633d480b60b053aa9eb6

Download Submit
memory/292-73-0x0000000000000000-mapping.dmp

Download
memory/320-65-0x0000000000000000-mapping.dmp

Download
memory/568-67-0x0000000000000000-mapping.dmp

Download
memory/608-74-0x0000000000000000-mapping.dmp

Download
memory/620-59-0x0000000000000000-mapping.dmp

Download
memory/620-132-0x0000000000400000-0x0000000000474000-memory.dmp

Filesize
464KB

Download
memory/620-63-0x0000000000400000-0x0000000000474000-memory.dmp

Filesize
464KB

Download
memory/620-75-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/664-66-0x0000000000000000-mapping.dmp

Download
memory/888-69-0x0000000000000000-mapping.dmp

Download
memory/1120-80-0x0000000000220000-0x000000000028E000-memory.dmp

Filesize
440KB

Download
memory/1120-81-0x0000000000220000-0x000000000028E000-memory.dmp

Filesize
440KB

Download
memory/1120-78-0x0000000000220000-0x000000000028E000-memory.dmp

Filesize
440KB

Download
memory/1120-76-0x0000000000220000-0x000000000028E000-memory.dmp

Filesize
440KB

Download
memory/1120-79-0x0000000000220000-0x000000000028E000-memory.dmp

Filesize
440KB

Download
memory/1200-84-0x0000000001D70000-0x0000000001DDE000-memory.dmp

Filesize
440KB

Download
memory/1200-85-0x0000000001D70000-0x0000000001DDE000-memory.dmp

Filesize
440KB

Download
memory/1200-86-0x0000000001D70000-0x0000000001DDE000-memory.dmp

Filesize
440KB

Download
memory/1200-87-0x0000000001D70000-0x0000000001DDE000-memory.dmp

Filesize
440KB

Download
memory/1244-93-0x0000000002B00000-0x0000000002B6E000-memory.dmp

Filesize
440KB

Download
memory/1244-91-0x0000000002B00000-0x0000000002B6E000-memory.dmp

Filesize
440KB

Download
memory/1244-90-0x0000000002B00000-0x0000000002B6E000-memory.dmp

Filesize
440KB

Download
memory/1244-92-0x0000000002B00000-0x0000000002B6E000-memory.dmp

Filesize
440KB

Download
memory/1320-68-0x0000000000000000-mapping.dmp

Download
memory/1416-72-0x0000000000000000-mapping.dmp

Download
memory/1420-71-0x0000000000000000-mapping.dmp

Download
memory/1636-54-0x00000000757B1000-0x00000000757B3000-memory.dmp

Filesize
8KB

Download
memory/1636-55-0x0000000000580000-0x00000000005C4000-memory.dmp

Filesize
272KB

Download
memory/1636-64-0x0000000000400000-0x0000000000474000-memory.dmp

Filesize
464KB

Download
memory/1636-96-0x0000000002660000-0x00000000026CE000-memory.dmp

Filesize
440KB

Download
memory/1636-97-0x0000000002660000-0x00000000026CE000-memory.dmp

Filesize
440KB

Download
memory/1636-98-0x0000000002660000-0x00000000026CE000-memory.dmp

Filesize
440KB

Download
memory/1636-99-0x0000000002660000-0x00000000026CE000-memory.dmp

Filesize
440KB

Download
memory/1636-103-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1636-102-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1636-101-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1636-100-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1636-104-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1636-105-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1636-106-0x0000000002660000-0x00000000026CE000-memory.dmp

Filesize
440KB

Download
memory/1636-56-0x0000000000400000-0x0000000000474000-memory.dmp

Filesize
464KB

Download
memory/1636-115-0x0000000000400000-0x0000000000474000-memory.dmp

Filesize
464KB

Download
memory/1668-109-0x00000000000A0000-0x000000000010E000-memory.dmp

Filesize
440KB

Download
memory/1668-121-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1668-114-0x00000000000E02ED-mapping.dmp

Download
memory/1668-112-0x00000000000A0000-0x000000000010E000-memory.dmp

Filesize
440KB

Download
memory/1668-117-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1668-118-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1668-119-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1668-120-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1668-122-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1668-113-0x00000000000A0000-0x000000000010E000-memory.dmp

Filesize
440KB

Download
memory/1668-123-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1668-124-0x00000000000A0000-0x000000000010E000-memory.dmp

Filesize
440KB

Download
memory/1668-111-0x00000000000A0000-0x000000000010E000-memory.dmp

Filesize
440KB

Download
memory/1732-128-0x00000000000D0000-0x000000000013E000-memory.dmp

Filesize
440KB

Download
memory/1732-129-0x00000000000D0000-0x000000000013E000-memory.dmp

Filesize
440KB

Download
memory/1732-130-0x00000000000D0000-0x000000000013E000-memory.dmp

Filesize
440KB

Download
memory/1732-127-0x00000000000D0000-0x000000000013E000-memory.dmp

Filesize
440KB

Download
memory/1864-70-0x0000000000000000-mapping.dmp

Download
memory/1948-133-0x000007FEFB851000-0x000007FEFB853000-memory.dmp

Filesize
8KB

Download