097d059e224b536c9c59223456fdb074ae01e4d99ab32ee07c2e4647e691bd65

Analysis

max time kernel
46s
max time network
46s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
29-11-2022 23:21

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General

Target

42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244.exe
Size

2.5MB
MD5

7dad5ca2096cbe129c0dade6cb2c915f
SHA1

7ef1eeab904b7b3afcc9e203be5e664388eb3198
SHA256

42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244
SHA512

87c9f5f16722113221c2ab2f11a9c4238b5706d8853288b3fa63b8bfa0462916dac8d62ee25d49e887202fa102edcc92540ddfb8d71ef19821d0b6c8770726c5
SSDEEP

24576:+5phTHwpeGenqhURy3e45mDyyg2lcV+q2lcV2sQ288nLS9XTJDsCSz1H3a:+5phTQpeZnqhURyOAbCC+fCc27n2wRHK

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

YHKO.exe

pid process

852 YHKO.exe
Loads dropped DLL 6 IoCs

Processes:

cmd.exeWerFault.exe

pid process

1948 cmd.exe
1616 WerFault.exe
1616 WerFault.exe
1616 WerFault.exe
1616 WerFault.exe
1616 WerFault.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

1616 852 WerFault.exe YHKO.exe
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

1560 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1916 timeout.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244.exeYHKO.exepowershell.exepowershell.exe

pid process

1980 42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244.exe
852 YHKO.exe
268 powershell.exe
1816 powershell.exe

pid	process
852	YHKO.exe

pid	process
1948	cmd.exe
1616	WerFault.exe
1616	WerFault.exe
1616	WerFault.exe
1616	WerFault.exe
1616	WerFault.exe

pid	pid_target	process	target process
1616	852	WerFault.exe	YHKO.exe

pid	process
1560	schtasks.exe

pid	process
1916	timeout.exe

pid	process
1980	42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244.exe
852	YHKO.exe
268	powershell.exe
1816	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244.exeYHKO.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	1980	42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244.exe
Token: SeDebugPrivilege	852	YHKO.exe
Token: SeDebugPrivilege	268	powershell.exe
Token: SeDebugPrivilege	1816	powershell.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244.execmd.exeYHKO.execmd.exe

description	pid	process	target process
PID 1980 wrote to memory of 1816	1980	42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244.exe	powershell.exe
PID 1980 wrote to memory of 1816	1980	42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244.exe	powershell.exe
PID 1980 wrote to memory of 1816	1980	42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244.exe	powershell.exe
PID 1980 wrote to memory of 1948	1980	42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244.exe	cmd.exe
PID 1980 wrote to memory of 1948	1980	42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244.exe	cmd.exe
PID 1980 wrote to memory of 1948	1980	42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244.exe	cmd.exe
PID 1948 wrote to memory of 1916	1948	cmd.exe	timeout.exe
PID 1948 wrote to memory of 1916	1948	cmd.exe	timeout.exe
PID 1948 wrote to memory of 1916	1948	cmd.exe	timeout.exe
PID 1948 wrote to memory of 852	1948	cmd.exe	YHKO.exe
PID 1948 wrote to memory of 852	1948	cmd.exe	YHKO.exe
PID 1948 wrote to memory of 852	1948	cmd.exe	YHKO.exe
PID 852 wrote to memory of 268	852	YHKO.exe	powershell.exe
PID 852 wrote to memory of 268	852	YHKO.exe	powershell.exe
PID 852 wrote to memory of 268	852	YHKO.exe	powershell.exe
PID 852 wrote to memory of 1032	852	YHKO.exe	cmd.exe
PID 852 wrote to memory of 1032	852	YHKO.exe	cmd.exe
PID 852 wrote to memory of 1032	852	YHKO.exe	cmd.exe
PID 1032 wrote to memory of 1560	1032	cmd.exe	schtasks.exe
PID 1032 wrote to memory of 1560	1032	cmd.exe	schtasks.exe
PID 1032 wrote to memory of 1560	1032	cmd.exe	schtasks.exe
PID 852 wrote to memory of 1616	852	YHKO.exe	WerFault.exe
PID 852 wrote to memory of 1616	852	YHKO.exe	WerFault.exe
PID 852 wrote to memory of 1616	852	YHKO.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244.exe
"C:\Users\Admin\AppData\Local\Temp\42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1980

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell" -Command Add-MpPreference -ExclusionPath 'C:\ProgramData'
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1816

C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp406B.tmp.bat""
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1948

C:\Windows\system32\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:1916

C:\ProgramData\dlllib\YHKO.exe
"C:\ProgramData\dlllib\YHKO.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:852

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell" -Command Add-MpPreference -ExclusionPath 'C:\ProgramData'
4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:268

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc MINUTE /mo 5 /RL HIGHEST /tn "YHKO" /tr "C:\ProgramData\dlllib\YHKO.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:1032

C:\Windows\system32\schtasks.exe
schtasks /create /f /sc MINUTE /mo 5 /RL HIGHEST /tn "YHKO" /tr "C:\ProgramData\dlllib\YHKO.exe"
5⤵
- Creates scheduled task(s)
PID:1560

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -u -p 852 -s 860
4⤵
- Loads dropped DLL
- Program crash
PID:1616

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\ProgramData\dlllib\YHKO.exe
Filesize
2.5MB

MD5
7dad5ca2096cbe129c0dade6cb2c915f

SHA1
7ef1eeab904b7b3afcc9e203be5e664388eb3198

SHA256
42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244

SHA512
87c9f5f16722113221c2ab2f11a9c4238b5706d8853288b3fa63b8bfa0462916dac8d62ee25d49e887202fa102edcc92540ddfb8d71ef19821d0b6c8770726c5

Download Submit
C:\ProgramData\dlllib\YHKO.exe
Filesize
2.5MB

MD5
7dad5ca2096cbe129c0dade6cb2c915f

SHA1
7ef1eeab904b7b3afcc9e203be5e664388eb3198

SHA256
42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244

SHA512
87c9f5f16722113221c2ab2f11a9c4238b5706d8853288b3fa63b8bfa0462916dac8d62ee25d49e887202fa102edcc92540ddfb8d71ef19821d0b6c8770726c5

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp406B.tmp.bat
Filesize
139B

MD5
605831ea0f0a4428293b3bd3d2c7613d

SHA1
103d409347468549e992a0790a3e325f11370c00

SHA256
2dcf8295c98e26502acaddeb94425edaa2b5082ab686d5090ee8d524e967418d

SHA512
3a16e98e8716d7acb7168800d864de9258e7b488926eb42cf1247a3c37d7b781fa820965c1266e974425ee525c9194f43c29101c1a8706892cee775b76ab8702

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
Filesize
7KB

MD5
1c5798dee8c9eeae33837b863faac554

SHA1
7ce78c0b3bc291b81430e6ab02e5fcad18d37acf

SHA256
4052f8c97e237daef91b3f14a1a0c7c7c43c8c4f967a55845fc4b4afed4f0014

SHA512
a84eade91392d9a7038f1f38c92b835df4f82f02b3d98472d8fc3eb36231321d4839475b1354f549969004f4670068f1e694133941dca3cbdf97949b9dca355c

Download Submit
\ProgramData\dlllib\YHKO.exe
Filesize
2.5MB

MD5
7dad5ca2096cbe129c0dade6cb2c915f

SHA1
7ef1eeab904b7b3afcc9e203be5e664388eb3198

SHA256
42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244

SHA512
87c9f5f16722113221c2ab2f11a9c4238b5706d8853288b3fa63b8bfa0462916dac8d62ee25d49e887202fa102edcc92540ddfb8d71ef19821d0b6c8770726c5

Download Submit
\ProgramData\dlllib\YHKO.exe
Filesize
2.5MB

MD5
7dad5ca2096cbe129c0dade6cb2c915f

SHA1
7ef1eeab904b7b3afcc9e203be5e664388eb3198

SHA256
42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244

SHA512
87c9f5f16722113221c2ab2f11a9c4238b5706d8853288b3fa63b8bfa0462916dac8d62ee25d49e887202fa102edcc92540ddfb8d71ef19821d0b6c8770726c5

Download Submit
\ProgramData\dlllib\YHKO.exe
Filesize
2.5MB

MD5
7dad5ca2096cbe129c0dade6cb2c915f

SHA1
7ef1eeab904b7b3afcc9e203be5e664388eb3198

SHA256
42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244

SHA512
87c9f5f16722113221c2ab2f11a9c4238b5706d8853288b3fa63b8bfa0462916dac8d62ee25d49e887202fa102edcc92540ddfb8d71ef19821d0b6c8770726c5

Download Submit
\ProgramData\dlllib\YHKO.exe
Filesize
2.5MB

MD5
7dad5ca2096cbe129c0dade6cb2c915f

SHA1
7ef1eeab904b7b3afcc9e203be5e664388eb3198

SHA256
42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244

SHA512
87c9f5f16722113221c2ab2f11a9c4238b5706d8853288b3fa63b8bfa0462916dac8d62ee25d49e887202fa102edcc92540ddfb8d71ef19821d0b6c8770726c5

Download Submit
\ProgramData\dlllib\YHKO.exe
Filesize
2.5MB

MD5
7dad5ca2096cbe129c0dade6cb2c915f

SHA1
7ef1eeab904b7b3afcc9e203be5e664388eb3198

SHA256
42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244

SHA512
87c9f5f16722113221c2ab2f11a9c4238b5706d8853288b3fa63b8bfa0462916dac8d62ee25d49e887202fa102edcc92540ddfb8d71ef19821d0b6c8770726c5

Download Submit
\ProgramData\dlllib\YHKO.exe
Filesize
2.5MB

MD5
7dad5ca2096cbe129c0dade6cb2c915f

SHA1
7ef1eeab904b7b3afcc9e203be5e664388eb3198

SHA256
42bf95c2a2fa7351fd81756bc7285495ecc31f4b37b280bdbd2b6116719d0244

SHA512
87c9f5f16722113221c2ab2f11a9c4238b5706d8853288b3fa63b8bfa0462916dac8d62ee25d49e887202fa102edcc92540ddfb8d71ef19821d0b6c8770726c5

Download Submit
memory/268-120-0x000000000246B000-0x000000000248A000-memory.dmp

Filesize
124KB

Download
memory/268-111-0x000007FEF57F0000-0x000007FEF634D000-memory.dmp

Filesize
11.4MB

Download
memory/268-114-0x0000000002464000-0x0000000002467000-memory.dmp

Filesize
12KB

Download
memory/268-110-0x000007FEECB20000-0x000007FEED543000-memory.dmp

Filesize
10.1MB

Download
memory/268-127-0x000000000246B000-0x000000000248A000-memory.dmp

Filesize
124KB

Download
memory/268-105-0x0000000000000000-mapping.dmp

Download
memory/268-126-0x0000000002464000-0x0000000002467000-memory.dmp

Filesize
12KB

Download
memory/852-113-0x000007FEFB4F0000-0x000007FEFB705000-memory.dmp

Filesize
2.1MB

Download
memory/852-102-0x000007FEFF0F0000-0x000007FEFF2F3000-memory.dmp

Filesize
2.0MB

Download
memory/852-118-0x000007FEFEE90000-0x000007FEFEF67000-memory.dmp

Filesize
860KB

Download
memory/852-115-0x000007FEF27A0000-0x000007FEF28D8000-memory.dmp

Filesize
1.2MB

Download
memory/852-117-0x00000000006C0000-0x0000000000701000-memory.dmp

Filesize
260KB

Download
memory/852-116-0x0000000000870000-0x0000000000B50000-memory.dmp

Filesize
2.9MB

Download
memory/852-104-0x000007FEF3740000-0x000007FEF386C000-memory.dmp

Filesize
1.2MB

Download
memory/852-103-0x0000000000870000-0x0000000000B50000-memory.dmp

Filesize
2.9MB

Download
memory/852-101-0x000007FEFED60000-0x000007FEFEE8D000-memory.dmp

Filesize
1.2MB

Download
memory/852-83-0x0000000000000000-mapping.dmp

Download
memory/852-100-0x000007FEF4E00000-0x000007FEF57EC000-memory.dmp

Filesize
9.9MB

Download
memory/852-87-0x000007FEF6900000-0x000007FEF696F000-memory.dmp

Filesize
444KB

Download
memory/852-91-0x0000000000870000-0x0000000000B50000-memory.dmp

Filesize
2.9MB

Download
memory/852-92-0x0000000077100000-0x00000000771FA000-memory.dmp

Filesize
1000KB

Download
memory/852-90-0x000007FEFD440000-0x000007FEFD4A7000-memory.dmp

Filesize
412KB

Download
memory/852-88-0x000007FEF6860000-0x000007FEF68FC000-memory.dmp

Filesize
624KB

Download
memory/852-98-0x000007FEF6490000-0x000007FEF6587000-memory.dmp

Filesize
988KB

Download
memory/852-99-0x000007FEFF010000-0x000007FEFF0EB000-memory.dmp

Filesize
876KB

Download
memory/852-97-0x000007FEFEF70000-0x000007FEFEFE1000-memory.dmp

Filesize
452KB

Download
memory/852-96-0x000007FEFD070000-0x000007FEFD0DC000-memory.dmp

Filesize
432KB

Download
memory/852-95-0x0000000076FE0000-0x00000000770FF000-memory.dmp

Filesize
1.1MB

Download
memory/852-94-0x000007FEFE550000-0x000007FEFE5EF000-memory.dmp

Filesize
636KB

Download
memory/852-93-0x00000000006C0000-0x0000000000701000-memory.dmp

Filesize
260KB

Download
memory/1032-109-0x0000000000000000-mapping.dmp

Download
memory/1560-112-0x0000000000000000-mapping.dmp

Download
memory/1616-121-0x0000000000000000-mapping.dmp

Download
memory/1816-119-0x000000000250B000-0x000000000252A000-memory.dmp

Filesize
124KB

Download
memory/1816-73-0x000007FEFBA81000-0x000007FEFBA83000-memory.dmp

Filesize
8KB

Download
memory/1816-79-0x000007FEECB20000-0x000007FEED543000-memory.dmp

Filesize
10.1MB

Download
memory/1816-72-0x0000000000000000-mapping.dmp

Download
memory/1816-89-0x0000000002504000-0x0000000002507000-memory.dmp

Filesize
12KB

Download
memory/1816-128-0x0000000002504000-0x0000000002507000-memory.dmp

Filesize
12KB

Download
memory/1816-81-0x000007FEF57F0000-0x000007FEF634D000-memory.dmp

Filesize
11.4MB

Download
memory/1816-129-0x000000000250B000-0x000000000252A000-memory.dmp

Filesize
124KB

Download
memory/1916-77-0x0000000000000000-mapping.dmp

Download
memory/1948-74-0x0000000000000000-mapping.dmp

Download
memory/1980-68-0x000007FEFED60000-0x000007FEFEE8D000-memory.dmp

Filesize
1.2MB

Download
memory/1980-65-0x00000000000E0000-0x0000000000121000-memory.dmp

Filesize
260KB

Download
memory/1980-78-0x00000000012C0000-0x00000000015A0000-memory.dmp

Filesize
2.9MB

Download
memory/1980-63-0x000007FEF6590000-0x000007FEF6687000-memory.dmp

Filesize
988KB

Download
memory/1980-66-0x000007FEFF010000-0x000007FEFF0EB000-memory.dmp

Filesize
876KB

Download
memory/1980-64-0x00000000012C0000-0x00000000015A0000-memory.dmp

Filesize
2.9MB

Download
memory/1980-75-0x000007FEFEB60000-0x000007FEFEB7F000-memory.dmp

Filesize
124KB

Download
memory/1980-67-0x000007FEF5960000-0x000007FEF634C000-memory.dmp

Filesize
9.9MB

Download
memory/1980-80-0x00000000000E0000-0x0000000000121000-memory.dmp

Filesize
260KB

Download
memory/1980-55-0x000007FEF6900000-0x000007FEF696F000-memory.dmp

Filesize
444KB

Download
memory/1980-71-0x000007FEF6460000-0x000007FEF658C000-memory.dmp

Filesize
1.2MB

Download
memory/1980-62-0x000007FEFEF70000-0x000007FEFEFE1000-memory.dmp

Filesize
452KB

Download
memory/1980-61-0x000007FEFD070000-0x000007FEFD0DC000-memory.dmp

Filesize
432KB

Download
memory/1980-60-0x0000000076FE0000-0x00000000770FF000-memory.dmp

Filesize
1.1MB

Download
memory/1980-59-0x000007FEFE550000-0x000007FEFE5EF000-memory.dmp

Filesize
636KB

Download
memory/1980-58-0x0000000077100000-0x00000000771FA000-memory.dmp

Filesize
1000KB

Download
memory/1980-57-0x000007FEFD440000-0x000007FEFD4A7000-memory.dmp

Filesize
412KB

Download
memory/1980-70-0x00000000012C0000-0x00000000015A0000-memory.dmp

Filesize
2.9MB

Download
memory/1980-69-0x000007FEFF0F0000-0x000007FEFF2F3000-memory.dmp

Filesize
2.0MB

Download
memory/1980-56-0x000007FEF6860000-0x000007FEF68FC000-memory.dmp

Filesize
624KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads