4d4f1d9ac5e7887dda018ea46753789a0c3d8e1199ea3c34502aa8da2136fe0e

General

Target

nes1.exe
Size

75KB
MD5

147e760e14fcb833dd6dba8aabfbe092
SHA1

8ae5369a8a95737a8efc4831f5a20ca6b2d959b6
SHA256

4d4f1d9ac5e7887dda018ea46753789a0c3d8e1199ea3c34502aa8da2136fe0e
SHA512

ebad6c551e11acef22e2952131e68dec9931a31f366d89f9d02ed63b3e479a8e6fa2eaa38b6d4c2885e1714e888124c207a7dbc4c15741f5cb11d8081d1198a5

Score

10^/10

evasion persistence trojan

Malware Config

Signatures

UAC bypass 3 TTPs
evasion trojan

Bypass User Account Control
T1088

Disabling Security Tools
T1089

Modify Registry
T1112
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:

nes1.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation nes1.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	nes1.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

nes1.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\applicationSU = "\"C:\\Users\\Admin\\AppData\\Roaming\\tmp1\\apps\\applicationSU.exe\""	nes1.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.

Processes:

flow ioc

34 eth0.me
Suspicious use of SetThreadContext 1 IoCs

Processes:

nes1.exe

description pid process target process

PID 3000 set thread context of 4124 3000 nes1.exe MSBuild.exe
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 4 IoCs

Processes:

powershell.exenes1.exe

pid process

860 powershell.exe
860 powershell.exe
3000 nes1.exe
3000 nes1.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

nes1.exepowershell.exeMSBuild.exe

description pid process

Token: SeDebugPrivilege 3000 nes1.exe
Token: SeDebugPrivilege 860 powershell.exe
Token: SeDebugPrivilege 4124 MSBuild.exe

flow	ioc
34	eth0.me

description	pid	process	target process
PID 3000 set thread context of 4124	3000	nes1.exe	MSBuild.exe

pid	process
860	powershell.exe
860	powershell.exe
3000	nes1.exe
3000	nes1.exe

description	pid	process
Token: SeDebugPrivilege	3000	nes1.exe
Token: SeDebugPrivilege	860	powershell.exe
Token: SeDebugPrivilege	4124	MSBuild.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

nes1.exe

description	pid	process	target process
PID 3000 wrote to memory of 860	3000	nes1.exe	powershell.exe
PID 3000 wrote to memory of 860	3000	nes1.exe	powershell.exe
PID 3000 wrote to memory of 860	3000	nes1.exe	powershell.exe
PID 3000 wrote to memory of 4124	3000	nes1.exe	MSBuild.exe
PID 3000 wrote to memory of 4124	3000	nes1.exe	MSBuild.exe
PID 3000 wrote to memory of 4124	3000	nes1.exe	MSBuild.exe
PID 3000 wrote to memory of 4124	3000	nes1.exe	MSBuild.exe
PID 3000 wrote to memory of 4124	3000	nes1.exe	MSBuild.exe
PID 3000 wrote to memory of 4124	3000	nes1.exe	MSBuild.exe
PID 3000 wrote to memory of 4124	3000	nes1.exe	MSBuild.exe
PID 3000 wrote to memory of 4124	3000	nes1.exe	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\nes1.exe
"C:\Users\Admin\AppData\Local\Temp\nes1.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3000
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwBlAHQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgACcAQwA6AFwAJwAsACcAQwA6AFwAVQBzAGUAcgBzAFwAQQBkAG0AaQBuAFwAQQBwAHAARABhAHQAYQBcAFIAbwBhAG0AaQBuAGcAXAB0AG0AcAAxAFwAYQBwAHAAcwBcAGEAcABwAGwAaQBjAGEAdABpAG8AbgBTAFUALgBlAHgAZQAnAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:860
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4124

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Bypass User Account Control

1

T1088

Defense Evasion

Bypass User Account Control

1

T1088

Disabling Security Tools

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/860-146-0x0000000006760000-0x0000000006792000-memory.dmp

Filesize
200KB

Download
memory/860-137-0x0000000005380000-0x00000000059A8000-memory.dmp

Filesize
6.2MB

Download
memory/860-156-0x00000000077C0000-0x00000000077C8000-memory.dmp

Filesize
32KB

Download
memory/860-155-0x00000000077E0000-0x00000000077FA000-memory.dmp

Filesize
104KB

Download
memory/860-154-0x00000000076D0000-0x00000000076DE000-memory.dmp

Filesize
56KB

Download
memory/860-153-0x0000000007720000-0x00000000077B6000-memory.dmp

Filesize
600KB

Download
memory/860-136-0x0000000002BB0000-0x0000000002BE6000-memory.dmp

Filesize
216KB

Download
memory/860-147-0x000000006F550000-0x000000006F59C000-memory.dmp

Filesize
304KB

Download
memory/860-138-0x00000000051E0000-0x0000000005202000-memory.dmp

Filesize
136KB

Download
memory/860-148-0x0000000006740000-0x000000000675E000-memory.dmp

Filesize
120KB

Download
memory/860-140-0x0000000005B20000-0x0000000005B86000-memory.dmp

Filesize
408KB

Download
memory/860-141-0x00000000745F0000-0x0000000074DA0000-memory.dmp

Filesize
7.7MB

Download
memory/860-142-0x0000000002C50000-0x0000000002C51000-memory.dmp

Filesize
4KB

Download
memory/860-143-0x0000000002C52000-0x0000000002C53000-memory.dmp

Filesize
4KB

Download
memory/860-144-0x0000000006190000-0x00000000061AE000-memory.dmp

Filesize
120KB

Download
memory/860-145-0x0000000002C55000-0x0000000002C57000-memory.dmp

Filesize
8KB

Download
memory/860-152-0x0000000007510000-0x000000000751A000-memory.dmp

Filesize
40KB

Download
memory/860-151-0x000000007F230000-0x000000007F231000-memory.dmp

Filesize
4KB

Download
memory/860-139-0x0000000005AB0000-0x0000000005B16000-memory.dmp

Filesize
408KB

Download
memory/860-149-0x0000000007AE0000-0x000000000815A000-memory.dmp

Filesize
6.5MB

Download
memory/860-150-0x00000000074A0000-0x00000000074BA000-memory.dmp

Filesize
104KB

Download
memory/3000-132-0x0000000005A40000-0x0000000005FE4000-memory.dmp

Filesize
5.6MB

Download
memory/3000-134-0x0000000005550000-0x000000000555A000-memory.dmp

Filesize
40KB

Download
memory/3000-135-0x0000000005490000-0x0000000005A34000-memory.dmp

Filesize
5.6MB

Download
memory/3000-130-0x0000000000B90000-0x0000000000BA6000-memory.dmp

Filesize
88KB

Download
memory/3000-133-0x0000000005570000-0x0000000005602000-memory.dmp

Filesize
584KB

Download
memory/3000-131-0x00000000745F0000-0x0000000074DA0000-memory.dmp

Filesize
7.7MB

Download
memory/4124-157-0x0000000000400000-0x00000000004A0000-memory.dmp

Filesize
640KB

Download
memory/4124-161-0x00000000055C0000-0x0000000005B64000-memory.dmp

Filesize
5.6MB

Download
memory/4124-158-0x0000000006B30000-0x0000000006CF2000-memory.dmp

Filesize
1.8MB

Download
memory/4124-159-0x00000000745F0000-0x0000000074DA0000-memory.dmp

Filesize
7.7MB

Download
memory/4124-160-0x0000000006A10000-0x0000000006A86000-memory.dmp

Filesize
472KB

Download
memory/4124-162-0x0000000007230000-0x000000000775C000-memory.dmp

Filesize
5.2MB

Download
memory/4124-163-0x0000000006AC0000-0x0000000006ADE000-memory.dmp

Filesize
120KB

Download

Analysis

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