d3ddf40b5133634e7b56f9532035264723ac3006442f82f1af013c88f581ad22

Analysis

max time kernel
139s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20220721-en
resource tags

arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
submitted
09-08-2022 08:38

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General

Target

oka.exe
Size

1.7MB
MD5

09cf009d15f845497667171a11a51fd3
SHA1

c45fdc8dacdf6901e81185ff684d3deda57af6e7
SHA256

d3ddf40b5133634e7b56f9532035264723ac3006442f82f1af013c88f581ad22
SHA512

75424b3572e63f8eb19b6c8cbc5c987354f7db8bb4d32e8f3a5c74fee8144b8ec717bc4422ac090b2763b5e10917927c7a8c136e23832a7362646b33a9c903c0

Score

8^/10

upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

svchost.exe

pid process

4212 svchost.exe

pid	process
4212	svchost.exe

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1244-137-0x0000000000900000-0x0000000000CE4000-memory.dmp	upx
behavioral2/memory/1244-138-0x0000000000900000-0x0000000000CE4000-memory.dmp	upx

Suspicious use of SetThreadContext 1 IoCs

Processes:

oka.exe

description pid process target process

PID 888 set thread context of 1244 888 oka.exe RegAsm.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1140 1244 WerFault.exe RegAsm.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

4844 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

oka.exesvchost.exe

description pid process

Token: SeDebugPrivilege 888 oka.exe
Token: SeDebugPrivilege 4212 svchost.exe

description	pid	process	target process
PID 888 set thread context of 1244	888	oka.exe	RegAsm.exe

pid	pid_target	process	target process
1140	1244	WerFault.exe	RegAsm.exe

pid	process
4844	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	888	oka.exe
Token: SeDebugPrivilege	4212	svchost.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

oka.execmd.exe

description	pid	process	target process
PID 888 wrote to memory of 1244	888	oka.exe	RegAsm.exe
PID 888 wrote to memory of 1244	888	oka.exe	RegAsm.exe
PID 888 wrote to memory of 1244	888	oka.exe	RegAsm.exe
PID 888 wrote to memory of 1244	888	oka.exe	RegAsm.exe
PID 888 wrote to memory of 1244	888	oka.exe	RegAsm.exe
PID 888 wrote to memory of 1244	888	oka.exe	RegAsm.exe
PID 888 wrote to memory of 1244	888	oka.exe	RegAsm.exe
PID 888 wrote to memory of 1144	888	oka.exe	cmd.exe
PID 888 wrote to memory of 1144	888	oka.exe	cmd.exe
PID 888 wrote to memory of 1144	888	oka.exe	cmd.exe
PID 888 wrote to memory of 4876	888	oka.exe	cmd.exe
PID 888 wrote to memory of 4876	888	oka.exe	cmd.exe
PID 888 wrote to memory of 4876	888	oka.exe	cmd.exe
PID 888 wrote to memory of 3664	888	oka.exe	cmd.exe
PID 888 wrote to memory of 3664	888	oka.exe	cmd.exe
PID 888 wrote to memory of 3664	888	oka.exe	cmd.exe
PID 4876 wrote to memory of 4844	4876	cmd.exe	schtasks.exe
PID 4876 wrote to memory of 4844	4876	cmd.exe	schtasks.exe
PID 4876 wrote to memory of 4844	4876	cmd.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\oka.exe
"C:\Users\Admin\AppData\Local\Temp\oka.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:888

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
PID:1244

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1244 -s 540
3⤵
- Program crash
PID:1140

C:\Windows\SysWOW64\cmd.exe
"cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\svchost"
2⤵
PID:1144

C:\Windows\SysWOW64\cmd.exe
"cmd" /c schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\svchost\svchost.exe'" /f
2⤵
- Suspicious use of WriteProcessMemory
PID:4876

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\svchost\svchost.exe'" /f
3⤵
- Creates scheduled task(s)
PID:4844

C:\Windows\SysWOW64\cmd.exe
"cmd" /c copy "C:\Users\Admin\AppData\Local\Temp\oka.exe" "C:\Users\Admin\AppData\Roaming\svchost\svchost.exe"
2⤵
PID:3664

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1244 -ip 1244
1⤵
PID:2860

C:\Users\Admin\AppData\Roaming\svchost\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4212

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\svchost\svchost.exe
Filesize
1.7MB

MD5
09cf009d15f845497667171a11a51fd3

SHA1
c45fdc8dacdf6901e81185ff684d3deda57af6e7

SHA256
d3ddf40b5133634e7b56f9532035264723ac3006442f82f1af013c88f581ad22

SHA512
75424b3572e63f8eb19b6c8cbc5c987354f7db8bb4d32e8f3a5c74fee8144b8ec717bc4422ac090b2763b5e10917927c7a8c136e23832a7362646b33a9c903c0

Download Submit
C:\Users\Admin\AppData\Roaming\svchost\svchost.exe
Filesize
1.7MB

MD5
09cf009d15f845497667171a11a51fd3

SHA1
c45fdc8dacdf6901e81185ff684d3deda57af6e7

SHA256
d3ddf40b5133634e7b56f9532035264723ac3006442f82f1af013c88f581ad22

SHA512
75424b3572e63f8eb19b6c8cbc5c987354f7db8bb4d32e8f3a5c74fee8144b8ec717bc4422ac090b2763b5e10917927c7a8c136e23832a7362646b33a9c903c0

Download Submit
memory/888-130-0x0000000000090000-0x0000000000246000-memory.dmp

Filesize
1.7MB

Download
memory/1144-133-0x0000000000000000-mapping.dmp

Download
memory/1244-131-0x0000000000000000-mapping.dmp

Download
memory/1244-137-0x0000000000900000-0x0000000000CE4000-memory.dmp

Filesize
3.9MB

Download
memory/1244-138-0x0000000000900000-0x0000000000CE4000-memory.dmp

Filesize
3.9MB

Download
memory/3664-135-0x0000000000000000-mapping.dmp

Download
memory/4212-141-0x00000000000E0000-0x0000000000296000-memory.dmp

Filesize
1.7MB

Download
memory/4844-136-0x0000000000000000-mapping.dmp

Download
memory/4876-134-0x0000000000000000-mapping.dmp

Download