90bc2a5ebf63e317f6cb6381e93b53eff3121d5321b7fca980d647b08ae2b55c

General

Target

90bc2a5ebf63e317f6cb6381e93b53eff3121d5321b7fca980d647b08ae2b55c.exe
Size

50KB
MD5

9b3bd6359c8cdb7358aa80f3561840e7
SHA1

f78c42d9306864613806ab2f49a3aba31a9bb54a
SHA256

90bc2a5ebf63e317f6cb6381e93b53eff3121d5321b7fca980d647b08ae2b55c
SHA512

ad2952ef408be5e97e4d71b252b1c7567d405b26d085888407f56d9365668746c8645db99b0108a24ed70d926e0e20bd201399610e2ed7d99d6027c81e8d983a
SSDEEP

768:hX0gWvCzuw6Uj9uGi45XOPxV5HNWnnnl000e999vddddIyyyOOtttb22221:6vCzuw6UD9Az5HNWnnn6222221

Score

8^/10

defense_evasion discovery evasion upx

Malware Config

Signatures

Sets file to hidden 1 TTPs 1 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
3180	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-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	90bc2a5ebf63e317f6cb6381e93b53eff3121d5321b7fca980d647b08ae2b55c.exe

Executes dropped EXE 1 IoCs

pid	Process
4136	mewhost.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4552-0-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/files/0x00090000000234d7-3.dat	upx
behavioral2/memory/4552-6-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/memory/4136-7-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/memory/4136-13-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/memory/4136-16-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/memory/4136-19-0x0000000000400000-0x0000000000416000-memory.dmp	upx

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

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Debug\mewhost.exe	90bc2a5ebf63e317f6cb6381e93b53eff3121d5321b7fca980d647b08ae2b55c.exe
File opened for modification	C:\Windows\Debug\mewhost.exe	90bc2a5ebf63e317f6cb6381e93b53eff3121d5321b7fca980d647b08ae2b55c.exe
File opened for modification	C:\Windows\Debug\mewhost.exe	attrib.exe

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 4 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	90bc2a5ebf63e317f6cb6381e93b53eff3121d5321b7fca980d647b08ae2b55c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mewhost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

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	mewhost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	mewhost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	4552	90bc2a5ebf63e317f6cb6381e93b53eff3121d5321b7fca980d647b08ae2b55c.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4552 wrote to memory of 3180	4552	90bc2a5ebf63e317f6cb6381e93b53eff3121d5321b7fca980d647b08ae2b55c.exe	83
PID 4552 wrote to memory of 3180	4552	90bc2a5ebf63e317f6cb6381e93b53eff3121d5321b7fca980d647b08ae2b55c.exe	83
PID 4552 wrote to memory of 3180	4552	90bc2a5ebf63e317f6cb6381e93b53eff3121d5321b7fca980d647b08ae2b55c.exe	83
PID 4552 wrote to memory of 2840	4552	90bc2a5ebf63e317f6cb6381e93b53eff3121d5321b7fca980d647b08ae2b55c.exe	89
PID 4552 wrote to memory of 2840	4552	90bc2a5ebf63e317f6cb6381e93b53eff3121d5321b7fca980d647b08ae2b55c.exe	89
PID 4552 wrote to memory of 2840	4552	90bc2a5ebf63e317f6cb6381e93b53eff3121d5321b7fca980d647b08ae2b55c.exe	89

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3180	attrib.exe

C:\Users\Admin\AppData\Local\Temp\90bc2a5ebf63e317f6cb6381e93b53eff3121d5321b7fca980d647b08ae2b55c.exe
"C:\Users\Admin\AppData\Local\Temp\90bc2a5ebf63e317f6cb6381e93b53eff3121d5321b7fca980d647b08ae2b55c.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4552
- C:\Windows\SysWOW64\attrib.exe
  attrib +a +s +h +r C:\Windows\Debug\mewhost.exe
  2⤵
  - Sets file to hidden
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Views/modifies file attributes
  PID:3180
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\90BC2A~1.EXE > nul
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2840

C:\Windows\Debug\mewhost.exe
C:\Windows\Debug\mewhost.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Checks processor information in registry
PID:4136

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

2

T1564

Hidden Files and Directories

2

T1564.001

Indicator Removal

1

T1070

File Deletion

1

T1070.004

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

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:\Windows\debug\mewhost.exe

Filesize
51KB

MD5
44a09a425780d8971a2a504ce1f05e57

SHA1
13188cc2c5a3b21aec61e446eca097b0f7088b66

SHA256
f7db210d4218a318093d56d38c4e04544bfb7dd9dda7783467b6e62e16749f5a

SHA512
649695c88cbe104f5dfd3534de96fe157c872a31e0874510eb767ef69d58678cc6bc94e04faed6261a2efa69776699702a72918a2ecbfa3c05c4fb9c1c4f3540

Download Submit
memory/4136-7-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/4136-13-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/4136-16-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/4136-19-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/4552-0-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/4552-6-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads