b6699f5d9c831f929999aa14a61a5abf69a2295b2a6c4017fe2d7c81a6c8e3d9

General

Target

b6699f5d9c831f929999aa14a61a5abf69a2295b2a6c4017fe2d7c81a6c8e3d9N.exe
Size

135KB
MD5

5afbd7dae5a115e09dfcee2dc2625170
SHA1

52c682351ca199a87d1365e482d4df6bc8d00c04
SHA256

b6699f5d9c831f929999aa14a61a5abf69a2295b2a6c4017fe2d7c81a6c8e3d9
SHA512

2512bdec2fdf79b9352b6a6adadccf397e6cc36b8b6fbe9223e27440b941a3491d478933d17e0cda1e69d75c68ca170eb54cc9f778938d87e3aba18ff0969fbc
SSDEEP

1536:YGYU/W2/HG6QMauSV3ixJHABLrmhH7i9eNOOg00GqMIK7aGZh3SO8A:YfU/WF6QMauSuiWNi9eNOl0007NZIO1

Score

7^/10

defense_evasion discovery persistence upx

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	b6699f5d9c831f929999aa14a61a5abf69a2295b2a6c4017fe2d7c81a6c8e3d9N.exe

Executes dropped EXE 1 IoCs

pid	Process
4444	wuauclt.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Window Update = "\"C:\\ProgramData\\Update\\wuauclt.exe\" /run"	b6699f5d9c831f929999aa14a61a5abf69a2295b2a6c4017fe2d7c81a6c8e3d9N.exe

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3116-0-0x0000000000940000-0x0000000000968000-memory.dmp	upx
behavioral2/files/0x0007000000023425-3.dat	upx
behavioral2/memory/4444-4-0x00000000002E0000-0x0000000000308000-memory.dmp	upx
behavioral2/memory/3116-6-0x0000000000940000-0x0000000000968000-memory.dmp	upx
behavioral2/memory/4444-7-0x00000000002E0000-0x0000000000308000-memory.dmp	upx
behavioral2/memory/3116-8-0x0000000000940000-0x0000000000968000-memory.dmp	upx

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b6699f5d9c831f929999aa14a61a5abf69a2295b2a6c4017fe2d7c81a6c8e3d9N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wuauclt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3116 wrote to memory of 4444	3116	b6699f5d9c831f929999aa14a61a5abf69a2295b2a6c4017fe2d7c81a6c8e3d9N.exe	81
PID 3116 wrote to memory of 4444	3116	b6699f5d9c831f929999aa14a61a5abf69a2295b2a6c4017fe2d7c81a6c8e3d9N.exe	81
PID 3116 wrote to memory of 4444	3116	b6699f5d9c831f929999aa14a61a5abf69a2295b2a6c4017fe2d7c81a6c8e3d9N.exe	81
PID 3116 wrote to memory of 2656	3116	b6699f5d9c831f929999aa14a61a5abf69a2295b2a6c4017fe2d7c81a6c8e3d9N.exe	90
PID 3116 wrote to memory of 2656	3116	b6699f5d9c831f929999aa14a61a5abf69a2295b2a6c4017fe2d7c81a6c8e3d9N.exe	90
PID 3116 wrote to memory of 2656	3116	b6699f5d9c831f929999aa14a61a5abf69a2295b2a6c4017fe2d7c81a6c8e3d9N.exe	90

C:\Users\Admin\AppData\Local\Temp\b6699f5d9c831f929999aa14a61a5abf69a2295b2a6c4017fe2d7c81a6c8e3d9N.exe
"C:\Users\Admin\AppData\Local\Temp\b6699f5d9c831f929999aa14a61a5abf69a2295b2a6c4017fe2d7c81a6c8e3d9N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3116
- C:\ProgramData\Update\wuauclt.exe
  "C:\ProgramData\Update\wuauclt.exe" /run
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4444
- C:\windows\SysWOW64\cmd.exe
  "C:\windows\system32\cmd.exe" /c del /q "C:\Users\Admin\AppData\Local\Temp\b6699f5d9c831f929999aa14a61a5abf69a2295b2a6c4017fe2d7c81a6c8e3d9N.exe" >> NUL
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2656

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Indicator Removal

1

T1070

File Deletion

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\Update\wuauclt.exe

Filesize
135KB

MD5
aaa7c19095e812cdc2b510df707735eb

SHA1
98d9777d4f2bc3d16211635b3550a5d93e1943b5

SHA256
0fa2ba3b3070b53c25868bd2cb615c8c76b5ce51962146a2d6e4b8e1c8e8b192

SHA512
0bf3135c823f48ce97cfb6cb38b3112b0aab3b2560057ac323ae26b4d7fbb35796e7864c88585f5b296f8dd82b813f35b7d1c897d6c620a110a3944908ca30a2

Download Submit
memory/3116-0-0x0000000000940000-0x0000000000968000-memory.dmp

Filesize
160KB

Download
memory/3116-6-0x0000000000940000-0x0000000000968000-memory.dmp

Filesize
160KB

Download
memory/3116-8-0x0000000000940000-0x0000000000968000-memory.dmp

Filesize
160KB

Download
memory/4444-4-0x00000000002E0000-0x0000000000308000-memory.dmp

Filesize
160KB

Download
memory/4444-7-0x00000000002E0000-0x0000000000308000-memory.dmp

Filesize
160KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads