8e83b4c798ca9e24e6b33ff30817a4bd2703bad34701f220f9b5f5e730fedcd9

Resubmissions

10/01/2023, 00:56

230110-batjlabg9z 10

10/01/2023, 00:50

230110-a6w4xsbg8x 10

09/01/2023, 22:18

230109-172nxabd8y 8

Analysis

max time kernel
140s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
10/01/2023, 00:56

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General

Target

8e83b4c798ca9e24e6b33ff30817a4bd2703bad34701f220f9b5f5e730fedcd9.exe
Size

1.0MB
MD5

dd30580c68a1fe179b2c1fed353b2ecb
SHA1

a6d06a2904cafe55f4832337dcb2a5cc563ca456
SHA256

8e83b4c798ca9e24e6b33ff30817a4bd2703bad34701f220f9b5f5e730fedcd9
SHA512

5b54a3f73c9e8fb3d9eff6ee579475c05724c5af703fa917438899857abeb730bea50f50752be4c10f12042c380d9a57d98ef9ef6b16658b39a950ff9b43a211
SSDEEP

24576:uurEZ30cjU8lSp/jh+Nc3VLn5W32gftwUys5NV:c0Olu/jwNcO9twH+

Score

10^/10

evasion persistence trojan

Malware Config

Signatures

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1088

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	InstallUtil.exe

Executes dropped EXE 1 IoCs

pid	Process
372	kernel32.exe

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	8e83b4c798ca9e24e6b33ff30817a4bd2703bad34701f220f9b5f5e730fedcd9.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run	8e83b4c798ca9e24e6b33ff30817a4bd2703bad34701f220f9b5f5e730fedcd9.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Baskov = "C:\\Users\\Admin\\Baskov\\kernel32.exe"	8e83b4c798ca9e24e6b33ff30817a4bd2703bad34701f220f9b5f5e730fedcd9.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
61	eth0.me

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 372 set thread context of 4676	372	kernel32.exe	86

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

System Information Discovery
T1082

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5096	PING.EXE

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4676	InstallUtil.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4876 wrote to memory of 372	4876	8e83b4c798ca9e24e6b33ff30817a4bd2703bad34701f220f9b5f5e730fedcd9.exe	81
PID 4876 wrote to memory of 372	4876	8e83b4c798ca9e24e6b33ff30817a4bd2703bad34701f220f9b5f5e730fedcd9.exe	81
PID 4876 wrote to memory of 372	4876	8e83b4c798ca9e24e6b33ff30817a4bd2703bad34701f220f9b5f5e730fedcd9.exe	81
PID 4876 wrote to memory of 4072	4876	8e83b4c798ca9e24e6b33ff30817a4bd2703bad34701f220f9b5f5e730fedcd9.exe	82
PID 4876 wrote to memory of 4072	4876	8e83b4c798ca9e24e6b33ff30817a4bd2703bad34701f220f9b5f5e730fedcd9.exe	82
PID 4876 wrote to memory of 4072	4876	8e83b4c798ca9e24e6b33ff30817a4bd2703bad34701f220f9b5f5e730fedcd9.exe	82
PID 4072 wrote to memory of 2620	4072	cmd.exe	84
PID 4072 wrote to memory of 2620	4072	cmd.exe	84
PID 4072 wrote to memory of 2620	4072	cmd.exe	84
PID 4072 wrote to memory of 5096	4072	cmd.exe	85
PID 4072 wrote to memory of 5096	4072	cmd.exe	85
PID 4072 wrote to memory of 5096	4072	cmd.exe	85
PID 372 wrote to memory of 4676	372	kernel32.exe	86
PID 372 wrote to memory of 4676	372	kernel32.exe	86
PID 372 wrote to memory of 4676	372	kernel32.exe	86
PID 372 wrote to memory of 4676	372	kernel32.exe	86
PID 372 wrote to memory of 4676	372	kernel32.exe	86

C:\Users\Admin\AppData\Local\Temp\8e83b4c798ca9e24e6b33ff30817a4bd2703bad34701f220f9b5f5e730fedcd9.exe
"C:\Users\Admin\AppData\Local\Temp\8e83b4c798ca9e24e6b33ff30817a4bd2703bad34701f220f9b5f5e730fedcd9.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4876
- C:\Users\Admin\Baskov\kernel32.exe
  "C:\Users\Admin\Baskov\kernel32.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:372
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
    3⤵
    - UAC bypass
    - Suspicious use of AdjustPrivilegeToken
    PID:4676
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c chcp 65001 && ping 127.0.0.1 && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\8e83b4c798ca9e24e6b33ff30817a4bd2703bad34701f220f9b5f5e730fedcd9.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4072
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:2620
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:5096

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Bypass User Account Control

T1088

Defense Evasion

Bypass User Account Control

T1088

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\Baskov\kernel32.exe

Filesize
651.0MB

MD5
8237709142d50ce4ea264e7e4422afa9

SHA1
22b8fbebd5d666594c1338c2fde727cf6ace6d28

SHA256
b0e088b6ab0d94ec71f4ec38933ac35aca91e25ecbb3e8daf493770122165874

SHA512
b121df712864397d45280f90e826e918a42aa5bae5d14c0bba1da330152dec8786451b0dcb44e364d27254421b68d90c1238bd75b7a437b8019e049ede9d7a96

Download Submit
C:\Users\Admin\Baskov\kernel32.exe

Filesize
651.0MB

MD5
8237709142d50ce4ea264e7e4422afa9

SHA1
22b8fbebd5d666594c1338c2fde727cf6ace6d28

SHA256
b0e088b6ab0d94ec71f4ec38933ac35aca91e25ecbb3e8daf493770122165874

SHA512
b121df712864397d45280f90e826e918a42aa5bae5d14c0bba1da330152dec8786451b0dcb44e364d27254421b68d90c1238bd75b7a437b8019e049ede9d7a96

Download Submit
memory/372-139-0x00000000009F1000-0x00000000009FC000-memory.dmp

Filesize
44KB

Download
memory/4676-141-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4676-142-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/4676-143-0x0000000005870000-0x0000000005E14000-memory.dmp

Filesize
5.6MB

Download
memory/4676-144-0x00000000052C0000-0x0000000005352000-memory.dmp

Filesize
584KB

Download
memory/4676-145-0x00000000051B0000-0x0000000005216000-memory.dmp

Filesize
408KB

Download
memory/4676-146-0x0000000006530000-0x00000000066F2000-memory.dmp

Filesize
1.8MB

Download
memory/4676-147-0x00000000063E0000-0x0000000006456000-memory.dmp

Filesize
472KB

Download
memory/4676-148-0x0000000006C30000-0x000000000715C000-memory.dmp

Filesize
5.2MB

Download
memory/4676-149-0x0000000006460000-0x000000000647E000-memory.dmp

Filesize
120KB

Download
memory/4876-132-0x00000000025E1000-0x00000000025EC000-memory.dmp

Filesize
44KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads