e5a5e82935acb5bf1706cd0e04a9bee5b0d995c4bf19ee3c363ceb9e6855ecab

Analysis

max time kernel
112s
max time network
130s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
01-02-2023 14:47

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General

Target

a3a1f1bee14b0e117ca9698ca7d4a964.exe
Size

2.7MB
MD5

a3a1f1bee14b0e117ca9698ca7d4a964
SHA1

c69838ade96ae8c914093516975929b84a86f098
SHA256

e5a5e82935acb5bf1706cd0e04a9bee5b0d995c4bf19ee3c363ceb9e6855ecab
SHA512

deaba5ffd966efaaabb864ac5886ebbb1c45f5286fb9a1897338d6fb6dcd733cd2f76ac769ca6795d3f7d1122c349879a339de1f8af9391853f3e2d448950773
SSDEEP

49152:dKfd3LCcCAwvevqw6m4OHoP45KBNu20Rt3CNuiO:ed3m06m4OIP45wN10Ro+

Score

10^/10

persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\System32\\RuntimeBroker.exe\","	a3a1f1bee14b0e117ca9698ca7d4a964.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	a3a1f1bee14b0e117ca9698ca7d4a964.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1980 set thread context of 3676	1980	a3a1f1bee14b0e117ca9698ca7d4a964.exe	84

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2800	powershell.exe
2800	powershell.exe
3676	a3a1f1bee14b0e117ca9698ca7d4a964.exe
3676	a3a1f1bee14b0e117ca9698ca7d4a964.exe
3676	a3a1f1bee14b0e117ca9698ca7d4a964.exe
3676	a3a1f1bee14b0e117ca9698ca7d4a964.exe
3676	a3a1f1bee14b0e117ca9698ca7d4a964.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2800	powershell.exe
Token: SeDebugPrivilege	1980	a3a1f1bee14b0e117ca9698ca7d4a964.exe
Token: SeDebugPrivilege	3676	a3a1f1bee14b0e117ca9698ca7d4a964.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1980 wrote to memory of 2800	1980	a3a1f1bee14b0e117ca9698ca7d4a964.exe	82
PID 1980 wrote to memory of 2800	1980	a3a1f1bee14b0e117ca9698ca7d4a964.exe	82
PID 1980 wrote to memory of 3676	1980	a3a1f1bee14b0e117ca9698ca7d4a964.exe	84
PID 1980 wrote to memory of 3676	1980	a3a1f1bee14b0e117ca9698ca7d4a964.exe	84
PID 1980 wrote to memory of 3676	1980	a3a1f1bee14b0e117ca9698ca7d4a964.exe	84
PID 1980 wrote to memory of 3676	1980	a3a1f1bee14b0e117ca9698ca7d4a964.exe	84
PID 1980 wrote to memory of 3676	1980	a3a1f1bee14b0e117ca9698ca7d4a964.exe	84
PID 1980 wrote to memory of 3676	1980	a3a1f1bee14b0e117ca9698ca7d4a964.exe	84

C:\Users\Admin\AppData\Local\Temp\a3a1f1bee14b0e117ca9698ca7d4a964.exe
"C:\Users\Admin\AppData\Local\Temp\a3a1f1bee14b0e117ca9698ca7d4a964.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1980
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2800
- C:\Users\Admin\AppData\Local\Temp\a3a1f1bee14b0e117ca9698ca7d4a964.exe
  C:\Users\Admin\AppData\Local\Temp\a3a1f1bee14b0e117ca9698ca7d4a964.exe
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3676

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\a3a1f1bee14b0e117ca9698ca7d4a964.exe.log

Filesize
1KB

MD5
77e686ae56571f3062d12e78a1521ab6

SHA1
e58989b612e4a8fc880e1d9e74dddad546bc2cec

SHA256
3890ac4a2b3e8c48b5531510af5e389b5ad4dc57d5ef166b05c2ebf61f20ba60

SHA512
1219951d7ca3c1e3d0d482f607b423aee3f6cb8c31f63f7388e7d2dd26b9188a4f8093889a527efd8cddd94196d1fa0700cb99aadcc290a1ad326e0afcdf78a7

Download Submit
memory/1980-132-0x00000000007C0000-0x0000000000A82000-memory.dmp

Filesize
2.8MB

Download
memory/1980-133-0x00000000034E0000-0x0000000003502000-memory.dmp

Filesize
136KB

Download
memory/1980-143-0x00007FFA4A0B0000-0x00007FFA4AB71000-memory.dmp

Filesize
10.8MB

Download
memory/1980-135-0x00007FFA4A0B0000-0x00007FFA4AB71000-memory.dmp

Filesize
10.8MB

Download
memory/1980-137-0x00007FFA4A0B0000-0x00007FFA4AB71000-memory.dmp

Filesize
10.8MB

Download
memory/2800-138-0x00007FFA4A0B0000-0x00007FFA4AB71000-memory.dmp

Filesize
10.8MB

Download
memory/2800-139-0x00007FFA4A0B0000-0x00007FFA4AB71000-memory.dmp

Filesize
10.8MB

Download
memory/2800-136-0x00007FFA4A0B0000-0x00007FFA4AB71000-memory.dmp

Filesize
10.8MB

Download
memory/3676-140-0x0000000140000000-0x0000000140078000-memory.dmp

Filesize
480KB

Download
memory/3676-144-0x00007FFA4A0B0000-0x00007FFA4AB71000-memory.dmp

Filesize
10.8MB

Download
memory/3676-145-0x00007FFA4A0B0000-0x00007FFA4AB71000-memory.dmp

Filesize
10.8MB

Download