4a1b16364c0928824aa286ffa2d028965723cbd35c8fc04b36562736c281df47

General

Target

fd1c4cbf9d453ae4c1ca38738a340200N.exe
Size

33KB
MD5

fd1c4cbf9d453ae4c1ca38738a340200
SHA1

58c60758587a65050b403f1e3556d0255f3060c7
SHA256

4a1b16364c0928824aa286ffa2d028965723cbd35c8fc04b36562736c281df47
SHA512

9833acc01d95a9246b568a30885a2f595a75a0ce897ec122ee605782e4a111915e0831d7f02ac75cbe599861600da48fe3e2c4ca32d8524f05500771bb946146
SSDEEP

768:4noSEjp9Plchfr6TUqnbcuyD7UYK4pavvvZeee26666HEEExTtqqqqBttttv:4oSEZWTUUqnouy8YXEvvvZeee5Lttttv

Score

7^/10

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
2820	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2704	rwmhost.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2232-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x0008000000012115-3.dat	upx
behavioral1/memory/2232-4-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/memory/2704-5-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/memory/2704-11-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/memory/2704-14-0x0000000000400000-0x000000000040E000-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 2 IoCs

description	ioc	Process
File created	C:\Windows\Debug\rwmhost.exe	fd1c4cbf9d453ae4c1ca38738a340200N.exe
File opened for modification	C:\Windows\Debug\rwmhost.exe	fd1c4cbf9d453ae4c1ca38738a340200N.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 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	rwmhost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fd1c4cbf9d453ae4c1ca38738a340200N.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	2232	fd1c4cbf9d453ae4c1ca38738a340200N.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2232 wrote to memory of 2820	2232	fd1c4cbf9d453ae4c1ca38738a340200N.exe	31
PID 2232 wrote to memory of 2820	2232	fd1c4cbf9d453ae4c1ca38738a340200N.exe	31
PID 2232 wrote to memory of 2820	2232	fd1c4cbf9d453ae4c1ca38738a340200N.exe	31
PID 2232 wrote to memory of 2820	2232	fd1c4cbf9d453ae4c1ca38738a340200N.exe	31

C:\Users\Admin\AppData\Local\Temp\fd1c4cbf9d453ae4c1ca38738a340200N.exe
"C:\Users\Admin\AppData\Local\Temp\fd1c4cbf9d453ae4c1ca38738a340200N.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2232
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\FD1C4C~1.EXE > nul
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2820

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:2704

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

Replay Monitor

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Downloads

C:\Windows\debug\rwmhost.exe

Filesize
34KB

MD5
d7b8b60c93794a2280896ebda3c6df2d

SHA1
4f6b49b0126cf559f6c4f3f2ddbce87d4d90b97e

SHA256
1b523a986f89938e360cffbb3258b5286def27052cd702c12b3eccfd3562ec2b

SHA512
a22083dac1111bde79ce273d1d4f4a538f39e5b04a798e04fbdeb6ecf7da8bc4c20819da4ab275194099116ec5a5d444c8190c022d60a6882fc05cf522897725

Download Submit
memory/2232-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2232-4-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2704-5-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2704-11-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2704-14-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download

Analysis

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