82d14733fd5b5666de6e779f75120f4510a01a35afdc6c249d12c0149cec8370

General

Target
82d14733fd5b5666de6e779f75120f4510a01a35afdc6c249d12c0149cec8370.exe
Size 134KB
Sample240725-3wkblawcrd
SHA256 82d14733fd5b5666de6e779f75120f4510a01a35afdc6c249d12c0149cec8370
MD5 031b5e24b99b6b157844e8d58d94646d
SHA1 a69fe690f9d9fc102bb6e132f54624230e0c447a
SHA512 530d0b332ae31524bfaebef5ce6f7df2d7d85489b4fe4424f6ee499f69add294c3e1462728a52b24e9aaa59762bf6e6e5d9ff7df4eeb5dca884dc8852e4acb93
SSDEEP 1536:YGYU/W2/HG6QMauSV3ixJHABLrmhH7i9eNOOg00GqMIK7aGZh3SOs:YfU/WF6QMauSuiWNi9eNOl0007NZIOs
MD5 SHA1 SHA512 SSDEEP

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-1-5-21-1176886754-713327781-2233697964-1000\Control Panel\International\Geo\Nation	82d14733fd5b5666de6e779f75120f4510a01a35afdc6c249d12c0149cec8370.exe

Executes dropped EXE 1 IoCs

pid	Process
4472	wuauclt.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/412-0-0x0000000000160000-0x0000000000188000-memory.dmp	upx
behavioral2/files/0x00080000000234d2-4.dat	upx
behavioral2/memory/4472-5-0x00000000002B0000-0x00000000002D8000-memory.dmp	upx
behavioral2/memory/412-6-0x0000000000160000-0x0000000000188000-memory.dmp	upx
behavioral2/memory/412-7-0x0000000000160000-0x0000000000188000-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"	82d14733fd5b5666de6e779f75120f4510a01a35afdc6c249d12c0149cec8370.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	82d14733fd5b5666de6e779f75120f4510a01a35afdc6c249d12c0149cec8370.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 412 wrote to memory of 4472	412	82d14733fd5b5666de6e779f75120f4510a01a35afdc6c249d12c0149cec8370.exe	83
PID 412 wrote to memory of 4472	412	82d14733fd5b5666de6e779f75120f4510a01a35afdc6c249d12c0149cec8370.exe	83
PID 412 wrote to memory of 4472	412	82d14733fd5b5666de6e779f75120f4510a01a35afdc6c249d12c0149cec8370.exe	83
PID 412 wrote to memory of 2928	412	82d14733fd5b5666de6e779f75120f4510a01a35afdc6c249d12c0149cec8370.exe	95
PID 412 wrote to memory of 2928	412	82d14733fd5b5666de6e779f75120f4510a01a35afdc6c249d12c0149cec8370.exe	95
PID 412 wrote to memory of 2928	412	82d14733fd5b5666de6e779f75120f4510a01a35afdc6c249d12c0149cec8370.exe	95

C:\Users\Admin\AppData\Local\Temp\82d14733fd5b5666de6e779f75120f4510a01a35afdc6c249d12c0149cec8370.exe
"C:\Users\Admin\AppData\Local\Temp\82d14733fd5b5666de6e779f75120f4510a01a35afdc6c249d12c0149cec8370.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:412
- C:\ProgramData\Update\wuauclt.exe
  "C:\ProgramData\Update\wuauclt.exe" /run
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:4472
- C:\windows\SysWOW64\cmd.exe
  "C:\windows\system32\cmd.exe" /c del /q "C:\Users\Admin\AppData\Local\Temp\82d14733fd5b5666de6e779f75120f4510a01a35afdc6c249d12c0149cec8370.exe" >> NUL
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2928

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

wuauclt.exe

Path C:\ProgramData\Update\wuauclt.exe
Size 134KB
SHA256 91f62239f1a3cfbfb300d379337d02235dcba341a9f9b84332300e2ace9f9d11
MD5 dffde0f48af23fd3d5c2b14a25d7ad5c
SHA1 7bd10e3e68f02d3e3590c874da866a5eaba27e9e
SHA512 4214025ae8ef01c4a072c3989bb0f1e100aade859d546cf7c66c01114350044cae30be13c6abcbd5286aec6ab2b811eeb7413e268bb9308c419e23956435e1d4
SSDEEP 1536:YGYU/W2/HG6QMauSV3ixJHABLrmhH7i9eNOOg00GqMIK7aGZh3SOo:YfU/WF6QMauSuiWNi9eNOl0007NZIOo
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/412-0-0x0000000000160000-0x0000000000188000-memory.dmp

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memory/412-6-0x0000000000160000-0x0000000000188000-memory.dmp

Download

memory/412-7-0x0000000000160000-0x0000000000188000-memory.dmp

Download

memory/4472-5-0x00000000002B0000-0x00000000002D8000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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