57857afb9f6e93b2aa6906f04ef44561d47c0d523512d7a92dfdfcac601c059e

Analysis

max time kernel
122s
max time network
184s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
20-10-2022 08:48

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General

Target

57857afb9f6e93b2aa6906f04ef44561d47c0d523512d7a92dfdfcac601c059e.exe
Size

262KB
MD5

808e73257a72ac25cc88f950a8551540
SHA1

7f1d9fb6a444d3faddd8a45480be8e8e9c3a8c67
SHA256

57857afb9f6e93b2aa6906f04ef44561d47c0d523512d7a92dfdfcac601c059e
SHA512

bb37216d75c87ab3ff7283af270a7d5558e0976a15680438a082d91805cd8ee7342002b8f98b440144821b677990ff461bf6bb8f69cd8ae385a9238c5795e86b
SSDEEP

6144:b1dlZro5yD9YWSHyx5TKdcGhvJOzDTlO6JfLL:b1dlZo5yRsKocKJOzX3

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4192	NjRat 0.5.0.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	57857afb9f6e93b2aa6906f04ef44561d47c0d523512d7a92dfdfcac601c059e.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\AppCompat\Programs\Amcache.hve.tmp	dw20.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeRestorePrivilege	1288	dw20.exe
Token: SeBackupPrivilege	1288	dw20.exe
Token: SeBackupPrivilege	1288	dw20.exe
Token: SeBackupPrivilege	1288	dw20.exe
Token: SeBackupPrivilege	1288	dw20.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5016 wrote to memory of 4192	5016	57857afb9f6e93b2aa6906f04ef44561d47c0d523512d7a92dfdfcac601c059e.exe	82
PID 5016 wrote to memory of 4192	5016	57857afb9f6e93b2aa6906f04ef44561d47c0d523512d7a92dfdfcac601c059e.exe	82
PID 5016 wrote to memory of 4192	5016	57857afb9f6e93b2aa6906f04ef44561d47c0d523512d7a92dfdfcac601c059e.exe	82
PID 4192 wrote to memory of 1288	4192	NjRat 0.5.0.exe	83
PID 4192 wrote to memory of 1288	4192	NjRat 0.5.0.exe	83
PID 4192 wrote to memory of 1288	4192	NjRat 0.5.0.exe	83

C:\Users\Admin\AppData\Local\Temp\57857afb9f6e93b2aa6906f04ef44561d47c0d523512d7a92dfdfcac601c059e.exe
"C:\Users\Admin\AppData\Local\Temp\57857afb9f6e93b2aa6906f04ef44561d47c0d523512d7a92dfdfcac601c059e.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5016
- C:\Extracted\NjRat 0.5.0.exe
  "C:\Extracted\NjRat 0.5.0.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:4192
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
    dw20.exe -x -s 864
    3⤵
    - Drops file in Windows directory
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    PID:1288

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Extracted\NjRat 0.5.0.exe

Filesize
216KB

MD5
630ccd444d5919d31cc7d7b921afabfa

SHA1
65d6526efb83c45eb6199d1e1bc8b03fa3afe4be

SHA256
6739b9e9848b155593fd71e6dfa0858aaf80b8be9e856f856c3bcca44e98bfec

SHA512
fe585222ed861680601be3276524e936a2a5a3010400a4d0073f85a0cb2350b3269a8a9455c11b63b8cba31abcea205ffc81aff1f8c058e6a2378b6e725e6d28

Download Submit
C:\Extracted\NjRat 0.5.0.exe

Filesize
216KB

MD5
630ccd444d5919d31cc7d7b921afabfa

SHA1
65d6526efb83c45eb6199d1e1bc8b03fa3afe4be

SHA256
6739b9e9848b155593fd71e6dfa0858aaf80b8be9e856f856c3bcca44e98bfec

SHA512
fe585222ed861680601be3276524e936a2a5a3010400a4d0073f85a0cb2350b3269a8a9455c11b63b8cba31abcea205ffc81aff1f8c058e6a2378b6e725e6d28

Download Submit
memory/4192-136-0x0000000074010000-0x00000000745C1000-memory.dmp

Filesize
5.7MB

Download
memory/4192-137-0x0000000074010000-0x00000000745C1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads