59040f8ff05b3023cbd02aab67e1292922d9ebdf7ae90c16bb255f0a230dbdc5

General

Target

2d39a6eeb83e7415900803b903ba2fa0N.exe
Size

168KB
MD5

2d39a6eeb83e7415900803b903ba2fa0
SHA1

a50b697ec23b8591d6c7a8524f32dce553ccd146
SHA256

59040f8ff05b3023cbd02aab67e1292922d9ebdf7ae90c16bb255f0a230dbdc5
SHA512

3ce4555ece215a6f602ca4985b665c5b167e2e2ea2030b56771a91ff363647535d74e383a2738d788e4404b3a2a5212fe24b043c8b9c266bcd7e957fb6c6b001
SSDEEP

1536:i2WDcOpULCH0a+TNXyyXetH28JZveKivnia:zWDuLzZXyyXeECveDnH

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
2400	attrib.exe

Deletes itself 1 IoCs

pid	Process
2176	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2772	rwmhost.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/3028-0-0x0000000000400000-0x0000000000429000-memory.dmp	upx
behavioral1/files/0x0003000000012000-3.dat	upx
behavioral1/memory/2772-5-0x0000000000400000-0x0000000000429000-memory.dmp	upx
behavioral1/memory/3028-6-0x0000000000400000-0x0000000000429000-memory.dmp	upx
behavioral1/memory/2772-7-0x0000000000400000-0x0000000000429000-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\rwmhost.exe	2d39a6eeb83e7415900803b903ba2fa0N.exe
File opened for modification	C:\Windows\Debug\rwmhost.exe	2d39a6eeb83e7415900803b903ba2fa0N.exe
File opened for modification	C:\Windows\Debug\rwmhost.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	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rwmhost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2d39a6eeb83e7415900803b903ba2fa0N.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	rwmhost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	rwmhost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	3028	2d39a6eeb83e7415900803b903ba2fa0N.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3028 wrote to memory of 2400	3028	2d39a6eeb83e7415900803b903ba2fa0N.exe	30
PID 3028 wrote to memory of 2400	3028	2d39a6eeb83e7415900803b903ba2fa0N.exe	30
PID 3028 wrote to memory of 2400	3028	2d39a6eeb83e7415900803b903ba2fa0N.exe	30
PID 3028 wrote to memory of 2400	3028	2d39a6eeb83e7415900803b903ba2fa0N.exe	30
PID 3028 wrote to memory of 2176	3028	2d39a6eeb83e7415900803b903ba2fa0N.exe	33
PID 3028 wrote to memory of 2176	3028	2d39a6eeb83e7415900803b903ba2fa0N.exe	33
PID 3028 wrote to memory of 2176	3028	2d39a6eeb83e7415900803b903ba2fa0N.exe	33
PID 3028 wrote to memory of 2176	3028	2d39a6eeb83e7415900803b903ba2fa0N.exe	33

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2400	attrib.exe

C:\Users\Admin\AppData\Local\Temp\2d39a6eeb83e7415900803b903ba2fa0N.exe
"C:\Users\Admin\AppData\Local\Temp\2d39a6eeb83e7415900803b903ba2fa0N.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3028
- C:\Windows\SysWOW64\attrib.exe
  attrib +a +s +h +r C:\Windows\Debug\rwmhost.exe
  2⤵
  - Sets file to hidden
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Views/modifies file attributes
  PID:2400
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\2D39A6~1.EXE > nul
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2176

C:\Windows\Debug\rwmhost.exe
C:\Windows\Debug\rwmhost.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Checks processor information in registry
PID:2772

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\rwmhost.exe

Filesize
168KB

MD5
e8b3c6f92d77ce193d9613ab50ed3de1

SHA1
b660ea5e59a803fedbe22e7746ca64c6c06b94bb

SHA256
1d1c4320fd22ea9ab92834b29f9ab2d40f03ba198f010f73bb492fb0dcba6387

SHA512
ca114cc46c614eda7fbddf4b094298ff5a22a2566e903148952e62bdaa32bd3ff51cb870bb4212e146dbcc429b317f7eba954709be1b126bb6f6c689d503b1ad

Download Submit
memory/2772-5-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/2772-7-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/3028-0-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/3028-6-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads