a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa

Analysis

max time kernel
141s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
18/10/2022, 05:40

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General

Target

a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe
Size

66KB
MD5

0d7dd2b8095e7f26ca11802ca11239ab
SHA1

7fa59c339e421f381942ff738cc6a5caa00b5a90
SHA256

a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa
SHA512

4fbede484c463e74c796c48f07981d0bc58b7d56a2edb2681d80de1e949dee70071abd59388d41f2af44319ef820e0d31c45a20adc0d8c69026e755fa343127e
SSDEEP

768:OrItKyw5WHXfQmjIiIk9ecAa7pP1VMs96MyX9DdtldE9rIIIwjFEEEQBggggu:Or3Z5IfQmv81a7pP1F3yXFdtnSju

Score

8^/10

evasion

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4372	dauhost.exe

Sets file to hidden 1 TTPs 1 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1158

pid	Process
4892	attrib.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Debug\dauhost.exe	attrib.exe
File created	C:\Windows\Debug\dauhost.exe	a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe
File opened for modification	C:\Windows\Debug\dauhost.exe	a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.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 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	dauhost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dauhost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	4252	a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4252 wrote to memory of 4892	4252	a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe	84
PID 4252 wrote to memory of 4892	4252	a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe	84
PID 4252 wrote to memory of 4892	4252	a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe	84
PID 4252 wrote to memory of 3396	4252	a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe	87
PID 4252 wrote to memory of 3396	4252	a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe	87
PID 4252 wrote to memory of 3396	4252	a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe	87

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
4892	attrib.exe

C:\Users\Admin\AppData\Local\Temp\a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe
"C:\Users\Admin\AppData\Local\Temp\a90af5e481a9f7262a9dc360391beaa689b52b47d6fcd624d08f5b59701ab2fa.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4252
- C:\Windows\SysWOW64\attrib.exe
  attrib +a +s +h +r C:\Windows\Debug\dauhost.exe
  2⤵
  - Sets file to hidden
  - Drops file in Windows directory
  - Views/modifies file attributes
  PID:4892
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\A90AF5~1.EXE > nul
  2⤵
  PID:3396

C:\Windows\Debug\dauhost.exe
C:\Windows\Debug\dauhost.exe
1⤵
- Executes dropped EXE
- Checks processor information in registry
PID:4372

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Privilege Escalation

Defense Evasion

Hidden Files and Directories

T1158

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\Debug\dauhost.exe

Filesize
66KB

MD5
38468a3895922b80d28e0c9e51c057c8

SHA1
e54bc7df0d99008bc9636ad520afca925a28db4c

SHA256
f1b5cecfa47b3d1647e7469fe4f226a44ce6b6d0c90099ec9eaab6d9162ad751

SHA512
cabf883bbc4499a6e96f8fd19ca21ac8b8e90745b89bfe5459c78931f6eec30134e4578ffd0a640a4f2750d311eb89409b7bfe733b23099800167ddd46d7a744

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C:\Windows\debug\dauhost.exe

Filesize
66KB

MD5
38468a3895922b80d28e0c9e51c057c8

SHA1
e54bc7df0d99008bc9636ad520afca925a28db4c

SHA256
f1b5cecfa47b3d1647e7469fe4f226a44ce6b6d0c90099ec9eaab6d9162ad751

SHA512
cabf883bbc4499a6e96f8fd19ca21ac8b8e90745b89bfe5459c78931f6eec30134e4578ffd0a640a4f2750d311eb89409b7bfe733b23099800167ddd46d7a744

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads