38339841c531017a7d9ab863247552b0475646bee71b0daf4a33f80ec4d02034

General

Target

38339841c531017a7d9ab863247552b0475646bee71b0daf4a33f80ec4d02034N.exe
Size

135KB
MD5

39f7ab04b34db819a09a1d0e63dacbe0
SHA1

6a5c7d8737f1775e0782c52cdc19397c3c63a10c
SHA256

38339841c531017a7d9ab863247552b0475646bee71b0daf4a33f80ec4d02034
SHA512

9263c5d8e9299fea669407bffe0e896c06bdad827e42a70867e84043209c6c5aa6582e71f379b2de982294f9a598d18b19846f90408cb80fb87d2e3cf92f9f94
SSDEEP

1536:YGYU/W2/HG6QMauSV3ixJHABLrmhH7i9eNOOg00GqMIK7aGZh3SOW:YfU/WF6QMauSuiWNi9eNOl0007NZIOW

Score

7^/10

defense_evasion discovery persistence upx

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
2560	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2812	wuauclt.exe

Loads dropped DLL 1 IoCs

pid	Process
2788	38339841c531017a7d9ab863247552b0475646bee71b0daf4a33f80ec4d02034N.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2788-0-0x00000000000C0000-0x00000000000E8000-memory.dmp	upx
behavioral1/files/0x0008000000016c62-2.dat	upx
behavioral1/memory/2812-7-0x0000000000F20000-0x0000000000F48000-memory.dmp	upx
behavioral1/memory/2788-8-0x00000000000C0000-0x00000000000E8000-memory.dmp	upx
behavioral1/memory/2812-10-0x0000000000F20000-0x0000000000F48000-memory.dmp	upx
behavioral1/memory/2788-11-0x00000000000C0000-0x00000000000E8000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Window Update = "\"C:\\ProgramData\\Update\\wuauclt.exe\" /run"	38339841c531017a7d9ab863247552b0475646bee71b0daf4a33f80ec4d02034N.exe

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
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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	38339841c531017a7d9ab863247552b0475646bee71b0daf4a33f80ec4d02034N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wuauclt.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2788 wrote to memory of 2812	2788	38339841c531017a7d9ab863247552b0475646bee71b0daf4a33f80ec4d02034N.exe	31
PID 2788 wrote to memory of 2812	2788	38339841c531017a7d9ab863247552b0475646bee71b0daf4a33f80ec4d02034N.exe	31
PID 2788 wrote to memory of 2812	2788	38339841c531017a7d9ab863247552b0475646bee71b0daf4a33f80ec4d02034N.exe	31
PID 2788 wrote to memory of 2812	2788	38339841c531017a7d9ab863247552b0475646bee71b0daf4a33f80ec4d02034N.exe	31
PID 2788 wrote to memory of 2560	2788	38339841c531017a7d9ab863247552b0475646bee71b0daf4a33f80ec4d02034N.exe	32
PID 2788 wrote to memory of 2560	2788	38339841c531017a7d9ab863247552b0475646bee71b0daf4a33f80ec4d02034N.exe	32
PID 2788 wrote to memory of 2560	2788	38339841c531017a7d9ab863247552b0475646bee71b0daf4a33f80ec4d02034N.exe	32
PID 2788 wrote to memory of 2560	2788	38339841c531017a7d9ab863247552b0475646bee71b0daf4a33f80ec4d02034N.exe	32

C:\Users\Admin\AppData\Local\Temp\38339841c531017a7d9ab863247552b0475646bee71b0daf4a33f80ec4d02034N.exe
"C:\Users\Admin\AppData\Local\Temp\38339841c531017a7d9ab863247552b0475646bee71b0daf4a33f80ec4d02034N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2788
- C:\ProgramData\Update\wuauclt.exe
  "C:\ProgramData\Update\wuauclt.exe" /run
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2812
- C:\windows\SysWOW64\cmd.exe
  "C:\windows\system32\cmd.exe" /c del /q "C:\Users\Admin\AppData\Local\Temp\38339841c531017a7d9ab863247552b0475646bee71b0daf4a33f80ec4d02034N.exe" >> NUL
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2560

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Indicator Removal

1

T1070

File Deletion

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

\ProgramData\Update\wuauclt.exe

Filesize
135KB

MD5
711c695a1e0bdafea9f50214d765a630

SHA1
80af834a956a6acb7cefc42a17b25e175027f5ab

SHA256
238bb13a7d7b48768d7a0ea5782f8e0395787ecfd31c380d818c07261a2719bd

SHA512
72e23eca9fc559f363acf11d974a3fc05c03267ff283c4a518228590f1c13c6aaa9105d5e2926a4eb51adf3f676bf82460cfec15cd5e018f6c374713495041c6

Download Submit
memory/2788-0-0x00000000000C0000-0x00000000000E8000-memory.dmp

Filesize
160KB

Download
memory/2788-6-0x0000000000080000-0x00000000000A8000-memory.dmp

Filesize
160KB

Download
memory/2788-8-0x00000000000C0000-0x00000000000E8000-memory.dmp

Filesize
160KB

Download
memory/2788-9-0x0000000000080000-0x00000000000A8000-memory.dmp

Filesize
160KB

Download
memory/2788-11-0x00000000000C0000-0x00000000000E8000-memory.dmp

Filesize
160KB

Download
memory/2812-7-0x0000000000F20000-0x0000000000F48000-memory.dmp

Filesize
160KB

Download
memory/2812-10-0x0000000000F20000-0x0000000000F48000-memory.dmp

Filesize
160KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads