752e7d326d94fefa12869bee8c54bfb197d193f151d72f936457a27bbd6b6877

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
03-02-2023 19:23

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General

Target

Loader.exe
Size

1.6MB
MD5

a44e526804469076d712e8a05ddd7759
SHA1

7010fda540e70139020a7a79730e74e99bd8e6c9
SHA256

46d7128963bde013c8ec359b285e47eabbf9c88e332735e02ced518773e8e95f
SHA512

04c40ef00c80d641c4f7bced8aefc180d695ea23ef79e272167f1a567484be2ab7031ca55a246cbeba1ed0c0ed93223fc2a33daed7f2048c62f169f0e6325b36
SSDEEP

49152:fBvdZG5o8InNXL9Qn0HpZjI64n2hcyfT2:pFZG5oNnRfh9

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-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Roaming\\Google\\Chrome.exe\","	Loader.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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	Loader.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4700 set thread context of 4928	4700	Loader.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 9 IoCs

pid	Process
4356	powershell.exe
4356	powershell.exe
4928	MSBuild.exe
4928	MSBuild.exe
4928	MSBuild.exe
4928	MSBuild.exe
4928	MSBuild.exe
4928	MSBuild.exe
4928	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4356	powershell.exe
Token: SeDebugPrivilege	4700	Loader.exe
Token: SeDebugPrivilege	4928	MSBuild.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4700 wrote to memory of 4356	4700	Loader.exe	81
PID 4700 wrote to memory of 4356	4700	Loader.exe	81
PID 4700 wrote to memory of 4928	4700	Loader.exe	84
PID 4700 wrote to memory of 4928	4700	Loader.exe	84
PID 4700 wrote to memory of 4928	4700	Loader.exe	84
PID 4700 wrote to memory of 4928	4700	Loader.exe	84
PID 4700 wrote to memory of 4928	4700	Loader.exe	84
PID 4700 wrote to memory of 4928	4700	Loader.exe	84

C:\Users\Admin\AppData\Local\Temp\Loader.exe
"C:\Users\Admin\AppData\Local\Temp\Loader.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4700
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMwAyAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4356
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4928

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

Replay Monitor

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Downloads

memory/4356-138-0x00007FF883FC0000-0x00007FF884A81000-memory.dmp

Filesize
10.8MB

Download
memory/4356-136-0x00007FF883FC0000-0x00007FF884A81000-memory.dmp

Filesize
10.8MB

Download
memory/4356-139-0x00007FF883FC0000-0x00007FF884A81000-memory.dmp

Filesize
10.8MB

Download
memory/4700-133-0x00007FF883FC0000-0x00007FF884A81000-memory.dmp

Filesize
10.8MB

Download
memory/4700-134-0x000001A1509A0000-0x000001A1509C2000-memory.dmp

Filesize
136KB

Download
memory/4700-137-0x00007FF883FC0000-0x00007FF884A81000-memory.dmp

Filesize
10.8MB

Download
memory/4700-132-0x000001A150470000-0x000001A150612000-memory.dmp

Filesize
1.6MB

Download
memory/4700-142-0x00007FF883FC0000-0x00007FF884A81000-memory.dmp

Filesize
10.8MB

Download
memory/4928-140-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/4928-143-0x00007FF883FC0000-0x00007FF884A81000-memory.dmp

Filesize
10.8MB

Download
memory/4928-144-0x00007FF883FC0000-0x00007FF884A81000-memory.dmp

Filesize
10.8MB

Download