616e3aafa3c2521aaf2ac14cbbd9fc600a176e71d64b8ced6fe09b82730654c8

General

Target

76bfb4f2ac7431fbab7c1fc96a00cc90N.exe
Size

23KB
MD5

76bfb4f2ac7431fbab7c1fc96a00cc90
SHA1

39ce04d2800a8233e467b349dee09c9d88e6dba0
SHA256

616e3aafa3c2521aaf2ac14cbbd9fc600a176e71d64b8ced6fe09b82730654c8
SHA512

bf6bdc5644bcd5bc12b03f902d54a51f8ffa8ec3752c8a15ec7f7ffa4292a231762f72549cfcb06184e59bbca394e7415795fec9821cc230ba1e1cd7cdd6c9ae
SSDEEP

384:+J5+c5mibCpKAjndr3Vo4G/usaNJawcudoD7UXlOIJquYz:uAcYimoqdm9gnbcuyD7U19K

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
2292	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-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	76bfb4f2ac7431fbab7c1fc96a00cc90N.exe

Executes dropped EXE 1 IoCs

pid	Process
3104	mewhost.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3372-0-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/files/0x00080000000234c1-3.dat	upx
behavioral2/memory/3372-5-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/memory/3104-6-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/memory/3104-9-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/memory/3104-12-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/memory/3104-15-0x0000000000400000-0x0000000000416000-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	76bfb4f2ac7431fbab7c1fc96a00cc90N.exe
File opened for modification	C:\Windows\Debug\mewhost.exe	76bfb4f2ac7431fbab7c1fc96a00cc90N.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	76bfb4f2ac7431fbab7c1fc96a00cc90N.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

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	3372	76bfb4f2ac7431fbab7c1fc96a00cc90N.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3372 wrote to memory of 2292	3372	76bfb4f2ac7431fbab7c1fc96a00cc90N.exe	84
PID 3372 wrote to memory of 2292	3372	76bfb4f2ac7431fbab7c1fc96a00cc90N.exe	84
PID 3372 wrote to memory of 2292	3372	76bfb4f2ac7431fbab7c1fc96a00cc90N.exe	84
PID 3372 wrote to memory of 3840	3372	76bfb4f2ac7431fbab7c1fc96a00cc90N.exe	89
PID 3372 wrote to memory of 3840	3372	76bfb4f2ac7431fbab7c1fc96a00cc90N.exe	89
PID 3372 wrote to memory of 3840	3372	76bfb4f2ac7431fbab7c1fc96a00cc90N.exe	89

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2292	attrib.exe

C:\Users\Admin\AppData\Local\Temp\76bfb4f2ac7431fbab7c1fc96a00cc90N.exe
"C:\Users\Admin\AppData\Local\Temp\76bfb4f2ac7431fbab7c1fc96a00cc90N.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:3372
- 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:2292
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\76BFB4~1.EXE > nul
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3840

C:\Windows\Debug\mewhost.exe
C:\Windows\Debug\mewhost.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3104

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

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:\Windows\debug\mewhost.exe

Filesize
23KB

MD5
5c3f5041ec221d3aaeec2c8d0f90ebe4

SHA1
4cdf00a9ce34f605ae4e3bb48c4890e6ed157e40

SHA256
ec5ab35f173971057685e13ef2f8bf42e411f2bc8c7b80229019568e32af6171

SHA512
d7e51679c50f94fac6c72d5278132b67844be7c72dc7bbe4f249d283e316bdb1dca54c5fe6b200b508297e78dc66cd78db8d86d9e375cc077c6184942be39a80

Download Submit
memory/3104-6-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/3104-9-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/3104-12-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/3104-15-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/3372-0-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/3372-5-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads