ef94c6d3589f2a43228ed40ba2c9e767e4f3905de062a5beeffff9feeee41a2a

General

Target

ef94c6d3589f2a43228ed40ba2c9e767e4f3905de062a5beeffff9feeee41a2aN.exe
Size

135KB
MD5

37217d0fb1cbf971031fdfdc76a4ae50
SHA1

f4c827b8841131a14e14ce1a38ab3735eec598c0
SHA256

ef94c6d3589f2a43228ed40ba2c9e767e4f3905de062a5beeffff9feeee41a2a
SHA512

b0952f18ea21946f72980cebcdf85fa7367d80101f20ba5a103e1ae0aff11e559cf758b6b7727d8cadf43b31e70011d7685b409aeda11e30b6e6f6f04d35a086
SSDEEP

1536:YGYU/W2/HG6QMauSV3ixJHABLrmhH7i9eNOOg00GqMIK7aGZh3SOM:YfU/WF6QMauSuiWNi9eNOl0007NZIOM

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-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	ef94c6d3589f2a43228ed40ba2c9e767e4f3905de062a5beeffff9feeee41a2aN.exe

Executes dropped EXE 1 IoCs

pid	Process
4468	wuauclt.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3884-0-0x00000000008F0000-0x0000000000918000-memory.dmp	upx
behavioral2/files/0x000800000002346b-3.dat	upx
behavioral2/memory/4468-4-0x0000000000AA0000-0x0000000000AC8000-memory.dmp	upx
behavioral2/memory/3884-6-0x00000000008F0000-0x0000000000918000-memory.dmp	upx
behavioral2/memory/4468-7-0x0000000000AA0000-0x0000000000AC8000-memory.dmp	upx
behavioral2/memory/3884-8-0x00000000008F0000-0x0000000000918000-memory.dmp	upx

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"	ef94c6d3589f2a43228ed40ba2c9e767e4f3905de062a5beeffff9feeee41a2aN.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
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	ef94c6d3589f2a43228ed40ba2c9e767e4f3905de062a5beeffff9feeee41a2aN.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 3884 wrote to memory of 4468	3884	ef94c6d3589f2a43228ed40ba2c9e767e4f3905de062a5beeffff9feeee41a2aN.exe	82
PID 3884 wrote to memory of 4468	3884	ef94c6d3589f2a43228ed40ba2c9e767e4f3905de062a5beeffff9feeee41a2aN.exe	82
PID 3884 wrote to memory of 4468	3884	ef94c6d3589f2a43228ed40ba2c9e767e4f3905de062a5beeffff9feeee41a2aN.exe	82
PID 3884 wrote to memory of 4832	3884	ef94c6d3589f2a43228ed40ba2c9e767e4f3905de062a5beeffff9feeee41a2aN.exe	91
PID 3884 wrote to memory of 4832	3884	ef94c6d3589f2a43228ed40ba2c9e767e4f3905de062a5beeffff9feeee41a2aN.exe	91
PID 3884 wrote to memory of 4832	3884	ef94c6d3589f2a43228ed40ba2c9e767e4f3905de062a5beeffff9feeee41a2aN.exe	91

C:\Users\Admin\AppData\Local\Temp\ef94c6d3589f2a43228ed40ba2c9e767e4f3905de062a5beeffff9feeee41a2aN.exe
"C:\Users\Admin\AppData\Local\Temp\ef94c6d3589f2a43228ed40ba2c9e767e4f3905de062a5beeffff9feeee41a2aN.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3884
- C:\ProgramData\Update\wuauclt.exe
  "C:\ProgramData\Update\wuauclt.exe" /run
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4468
- C:\windows\SysWOW64\cmd.exe
  "C:\windows\system32\cmd.exe" /c del /q "C:\Users\Admin\AppData\Local\Temp\ef94c6d3589f2a43228ed40ba2c9e767e4f3905de062a5beeffff9feeee41a2aN.exe" >> NUL
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4832

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
09f86ec23250a6847600c8ee51270881

SHA1
19cdbea5767193762bf0ca54be683ef8536fb3b8

SHA256
864f0db5d4a71ec09ad3778b0941745f212e0cb1e3c1d0edbc2ad2b81ff71661

SHA512
650b5b9788a78da21be7687dae6a01f7329ae1100e87e4fd87137106e407e8ffc979f093fad5cf9bb9a151c8c6df6a2289ef9f9ffc4a1095e1a31b4bad6e5a92

Download Submit
memory/3884-0-0x00000000008F0000-0x0000000000918000-memory.dmp

Filesize
160KB

Download
memory/3884-6-0x00000000008F0000-0x0000000000918000-memory.dmp

Filesize
160KB

Download
memory/3884-8-0x00000000008F0000-0x0000000000918000-memory.dmp

Filesize
160KB

Download
memory/4468-4-0x0000000000AA0000-0x0000000000AC8000-memory.dmp

Filesize
160KB

Download
memory/4468-7-0x0000000000AA0000-0x0000000000AC8000-memory.dmp

Filesize
160KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads