8b0a5fb13309623c3518473551cb1f55d38d8450129d4a3c16b476f7b2867d7d

Resubmissions

31-07-2023 12:37

230731-ptx8safd79 10

31-07-2023 12:37

230731-ptndksfd76 7

31-07-2023 11:43

230731-nvq1eseh69 10

Analysis

max time kernel
7s
max time network
14s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
31-07-2023 12:37

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General

Target

yOMHr.exe
Size

170KB
MD5

31bd0f224e7e74eee2847f43aae23974
SHA1

92e331e1e8ad30538f38dd7ba31386afafa14a58
SHA256

8b0a5fb13309623c3518473551cb1f55d38d8450129d4a3c16b476f7b2867d7d
SHA512

a13f05a12b084ef425f542ff4be824bbccb5dbdfe085af8b7e19d81a6bcba4b8c1debcc38f6b57bc9265a4db21eed70852ece8cc62b3ef14c47fca3035a55249
SSDEEP

3072:2qeriftL/WSo1vDb53j/8WGUzaqVh4LI8zQpn:2trA/WSo1rl3ALrlHQpn

Score

7^/10

persistence

Malware Config

Signatures

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:

yOMHr.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\Control Panel\International\Geo\Nation yOMHr.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\Control Panel\International\Geo\Nation	yOMHr.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\yOMHr.exe"	reg.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

yOMHr.exe

pid process

4172 yOMHr.exe
4172 yOMHr.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

yOMHr.exe

description pid process

Token: SeDebugPrivilege 4172 yOMHr.exe

pid	process
4172	yOMHr.exe
4172	yOMHr.exe

description	pid	process
Token: SeDebugPrivilege	4172	yOMHr.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

yOMHr.execmd.exe

description	pid	process	target process
PID 4172 wrote to memory of 2612	4172	yOMHr.exe	cmd.exe
PID 4172 wrote to memory of 2612	4172	yOMHr.exe	cmd.exe
PID 4172 wrote to memory of 2704	4172	yOMHr.exe	sihost.exe
PID 2612 wrote to memory of 1504	2612	cmd.exe	reg.exe
PID 2612 wrote to memory of 1504	2612	cmd.exe	reg.exe
PID 4172 wrote to memory of 2764	4172	yOMHr.exe	svchost.exe
PID 4172 wrote to memory of 2864	4172	yOMHr.exe	taskhostw.exe
PID 4172 wrote to memory of 3260	4172	yOMHr.exe	svchost.exe

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
1⤵
PID:3260

C:\Windows\system32\taskhostw.exe
taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
1⤵
PID:2864

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
1⤵
PID:2764

C:\Windows\system32\sihost.exe
sihost.exe
1⤵
PID:2704

C:\Users\Admin\AppData\Local\Temp\yOMHr.exe
"C:\Users\Admin\AppData\Local\Temp\yOMHr.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4172
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\yOMHr.exe" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2612
- - C:\Windows\system32\reg.exe
    REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\yOMHr.exe" /f
    3⤵
    - Adds Run key to start application
    PID:1504

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2704-133-0x00007FF6A83F0000-0x00007FF6A877E000-memory.dmp

Filesize
3.6MB

Download
memory/2704-134-0x00007FF6A83F0000-0x00007FF6A877E000-memory.dmp

Filesize
3.6MB

Download