2fb92cd068f5f815efed191c0f238889ef0fbe015e11c7449ee5d083c0e133d7

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
24-08-2024 22:52

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General

Target

Uninstall NuMuKi Browser.exe
Size

157KB
MD5

876865bfa7fdc640a2fd065ddda51330
SHA1

a225d7ca79f797fde27a6a24f969e1958e774155
SHA256

0e11cb2fbb92c1764a58740a804c4103a9b7b26e94a38802ebb946483b5a53ea
SHA512

b1e6e117098684724471706c9c787048f97230d049b060f755945764864f3d225eb0ea84ad9939ccca95f4e9f0d7d971f81942a06cacd8185cedec2a4276052a
SSDEEP

3072:tn77v00hEoDEtau6Y9KC1pvCx6F2iaH2tvhOEA1RJCir86SrSrvrIa3dXR:t740IlEApaxUs2t0EyL+tatXR

Score

7^/10

discovery

Malware Config

Signatures

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:

Un_A.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation Un_A.exe
Executes dropped EXE 1 IoCs

Processes:

Un_A.exe

pid process

3816 Un_A.exe
Loads dropped DLL 9 IoCs

Processes:

Un_A.exe

pid process

3816 Un_A.exe
3816 Un_A.exe
3816 Un_A.exe
3816 Un_A.exe
3816 Un_A.exe
3816 Un_A.exe
3816 Un_A.exe
3816 Un_A.exe
3816 Un_A.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	Un_A.exe

pid	process
3816	Un_A.exe

pid	process
3816	Un_A.exe
3816	Un_A.exe
3816	Un_A.exe
3816	Un_A.exe
3816	Un_A.exe
3816	Un_A.exe
3816	Un_A.exe
3816	Un_A.exe
3816	Un_A.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

Uninstall NuMuKi Browser.exeUn_A.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Uninstall NuMuKi Browser.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Un_A.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

Un_A.exe

pid process

3816 Un_A.exe
3816 Un_A.exe
3816 Un_A.exe
3816 Un_A.exe
3816 Un_A.exe
3816 Un_A.exe

pid	process
3816	Un_A.exe
3816	Un_A.exe
3816	Un_A.exe
3816	Un_A.exe
3816	Un_A.exe
3816	Un_A.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

Uninstall NuMuKi Browser.exe

description	pid	process	target process
PID 2832 wrote to memory of 3816	2832	Uninstall NuMuKi Browser.exe	Un_A.exe
PID 2832 wrote to memory of 3816	2832	Uninstall NuMuKi Browser.exe	Un_A.exe
PID 2832 wrote to memory of 3816	2832	Uninstall NuMuKi Browser.exe	Un_A.exe

C:\Users\Admin\AppData\Local\Temp\Uninstall NuMuKi Browser.exe
"C:\Users\Admin\AppData\Local\Temp\Uninstall NuMuKi Browser.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2832

C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe
"C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe" _?=C:\Users\Admin\AppData\Local\Temp\
2⤵
- Checks computer location settings
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:3816

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsxB372.tmp\StdUtils.dll
Filesize
100KB

MD5
c6a6e03f77c313b267498515488c5740

SHA1
3d49fc2784b9450962ed6b82b46e9c3c957d7c15

SHA256
b72e9013a6204e9f01076dc38dabbf30870d44dfc66962adbf73619d4331601e

SHA512
9870c5879f7b72836805088079ad5bbafcb59fc3d9127f2160d4ec3d6e88d3cc8ebe5a9f5d20a4720fe6407c1336ef10f33b2b9621bc587e930d4cbacf337803

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C:\Users\Admin\AppData\Local\Temp\nsxB372.tmp\System.dll
Filesize
12KB

MD5
0d7ad4f45dc6f5aa87f606d0331c6901

SHA1
48df0911f0484cbe2a8cdd5362140b63c41ee457

SHA256
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

SHA512
c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

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C:\Users\Admin\AppData\Local\Temp\nsxB372.tmp\WinShell.dll
Filesize
3KB

MD5
1cc7c37b7e0c8cd8bf04b6cc283e1e56

SHA1
0b9519763be6625bd5abce175dcc59c96d100d4c

SHA256
9be85b986ea66a6997dde658abe82b3147ed2a1a3dcb784bb5176f41d22815a6

SHA512
7acf7f8e68aa6066b59ca9f2ae2e67997e6b347bc08eb788d2a119b3295c844b5b9606757168e8d2fbd61c2cda367bf80e9e48c9a52c28d5a7a00464bfd2048f

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C:\Users\Admin\AppData\Local\Temp\nsxB372.tmp\nsProcess.dll
Filesize
4KB

MD5
f0438a894f3a7e01a4aae8d1b5dd0289

SHA1
b058e3fcfb7b550041da16bf10d8837024c38bf6

SHA256
30c6c3dd3cc7fcea6e6081ce821adc7b2888542dae30bf00e881c0a105eb4d11

SHA512
f91fcea19cbddf8086affcb63fe599dc2b36351fc81ac144f58a80a524043ddeaa3943f36c86ebae45dd82e8faf622ea7b7c9b776e74c54b93df2963cfe66cc7

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C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe
Filesize
157KB

MD5
876865bfa7fdc640a2fd065ddda51330

SHA1
a225d7ca79f797fde27a6a24f969e1958e774155

SHA256
0e11cb2fbb92c1764a58740a804c4103a9b7b26e94a38802ebb946483b5a53ea

SHA512
b1e6e117098684724471706c9c787048f97230d049b060f755945764864f3d225eb0ea84ad9939ccca95f4e9f0d7d971f81942a06cacd8185cedec2a4276052a

Download Submit