eefb77eaaa48a521884a7dbf3d365f000146b438d49fb5d8dec5cd2b4938b8ca

General

Target

eefb77eaaa48a521884a7dbf3d365f000146b438d49fb5d8dec5cd2b4938b8ca.exe
Size

59KB
MD5

affbf6781018b2f3add92847a0c42690
SHA1

3bf634d1d773ccb4a38bc542462524a51e7d24eb
SHA256

eefb77eaaa48a521884a7dbf3d365f000146b438d49fb5d8dec5cd2b4938b8ca
SHA512

852031db35487e093ed2fad741247911f9edd5df69b947457f746d66814573db313c17ad92a936c8db47bd21372984fe1f48b9953b96dc094382957f05ecb1ba
SSDEEP

1536:3+ZgwRdiE8cO4p1xRjfTvSq5r3ZiIZ4nouy8uh1aQb:OeodiUO4p13b9HiIeoutuh1aQb

Score

7^/10

defense_evasion discovery persistence upx

Malware Config

Signatures

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-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	eefb77eaaa48a521884a7dbf3d365f000146b438d49fb5d8dec5cd2b4938b8ca.exe

Executes dropped EXE 1 IoCs

pid	Process
4540	AhnSvc.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3668-0-0x0000000000070000-0x0000000000097000-memory.dmp	upx
behavioral2/files/0x0008000000023481-3.dat	upx
behavioral2/memory/4540-5-0x0000000000240000-0x0000000000267000-memory.dmp	upx
behavioral2/memory/3668-8-0x0000000000070000-0x0000000000097000-memory.dmp	upx
behavioral2/memory/4540-9-0x0000000000240000-0x0000000000267000-memory.dmp	upx
behavioral2/memory/4540-10-0x0000000000240000-0x0000000000267000-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\AhnUpadate = "\"C:\\ProgramData\\AhnLab\\AhnSvc.exe\" /run"	eefb77eaaa48a521884a7dbf3d365f000146b438d49fb5d8dec5cd2b4938b8ca.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	eefb77eaaa48a521884a7dbf3d365f000146b438d49fb5d8dec5cd2b4938b8ca.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AhnSvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3668	eefb77eaaa48a521884a7dbf3d365f000146b438d49fb5d8dec5cd2b4938b8ca.exe
Token: SeDebugPrivilege	4540	AhnSvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3668 wrote to memory of 4540	3668	eefb77eaaa48a521884a7dbf3d365f000146b438d49fb5d8dec5cd2b4938b8ca.exe	84
PID 3668 wrote to memory of 4540	3668	eefb77eaaa48a521884a7dbf3d365f000146b438d49fb5d8dec5cd2b4938b8ca.exe	84
PID 3668 wrote to memory of 4540	3668	eefb77eaaa48a521884a7dbf3d365f000146b438d49fb5d8dec5cd2b4938b8ca.exe	84
PID 3668 wrote to memory of 3716	3668	eefb77eaaa48a521884a7dbf3d365f000146b438d49fb5d8dec5cd2b4938b8ca.exe	85
PID 3668 wrote to memory of 3716	3668	eefb77eaaa48a521884a7dbf3d365f000146b438d49fb5d8dec5cd2b4938b8ca.exe	85
PID 3668 wrote to memory of 3716	3668	eefb77eaaa48a521884a7dbf3d365f000146b438d49fb5d8dec5cd2b4938b8ca.exe	85

C:\Users\Admin\AppData\Local\Temp\eefb77eaaa48a521884a7dbf3d365f000146b438d49fb5d8dec5cd2b4938b8ca.exe
"C:\Users\Admin\AppData\Local\Temp\eefb77eaaa48a521884a7dbf3d365f000146b438d49fb5d8dec5cd2b4938b8ca.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3668
- C:\ProgramData\AhnLab\AhnSvc.exe
  "C:\ProgramData\AhnLab\AhnSvc.exe" /run
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4540
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del /q "C:\Users\Admin\AppData\Local\Temp\eefb77eaaa48a521884a7dbf3d365f000146b438d49fb5d8dec5cd2b4938b8ca.exe" >> NUL
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3716

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

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:\ProgramData\AhnLab\AhnSvc.exe

Filesize
59KB

MD5
b12b5bb041160d14395192ca7b32767d

SHA1
92f0eec01caa8172d6fa0a70102174d1336c199b

SHA256
8ca3b697d4eb07af5f2ba4aeda0de7eab89007056cc2db30a080e17b60ec1b87

SHA512
935025e6736037947c8b409a1f82ce8aa335076bc71635e8ab24198ce46897033981aebb845fb4bb9fed08b683d76abee6b2b9346794e25d2d1d5776b22e34f5

Download Submit
memory/3668-0-0x0000000000070000-0x0000000000097000-memory.dmp

Filesize
156KB

Download
memory/3668-8-0x0000000000070000-0x0000000000097000-memory.dmp

Filesize
156KB

Download
memory/4540-5-0x0000000000240000-0x0000000000267000-memory.dmp

Filesize
156KB

Download
memory/4540-9-0x0000000000240000-0x0000000000267000-memory.dmp

Filesize
156KB

Download
memory/4540-10-0x0000000000240000-0x0000000000267000-memory.dmp

Filesize
156KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads