df0225a0022c2eb1dca4fe1d56d3fdb93f926a9c70049e4ef5f43711222eccc7

General

Target
9360507f2309692f5cbfd9f3cbfc77c0N.exe
Size 59KB
Sample240825-nyagvavaml
SHA256 df0225a0022c2eb1dca4fe1d56d3fdb93f926a9c70049e4ef5f43711222eccc7
MD5 9360507f2309692f5cbfd9f3cbfc77c0
SHA1 2020b2c4894a202c708dc4c4243d0fd962bfe6ce
SHA512 25e1010e8d928dd3ea55aa65a18de42a47f09a79eefcaa018b90e1f8eda4a7d8502c4900038605223437338316ec69c26fc735d455898d6740133a64d6c24143
SSDEEP 1536:3+ZgwRdiE8cO4p1xRjfTvSq5r3ZiIZ4nouy8uh1aQx:OeodiUO4p13b9HiIeoutuh1aQx
MD5 SHA1 SHA512 SSDEEP

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-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	9360507f2309692f5cbfd9f3cbfc77c0N.exe

Executes dropped EXE 1 IoCs

pid	Process
3604	AhnSvc.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1220-0-0x00000000001D0000-0x00000000001F7000-memory.dmp	upx
behavioral2/files/0x00090000000233fa-3.dat	upx
behavioral2/memory/3604-4-0x00000000005D0000-0x00000000005F7000-memory.dmp	upx
behavioral2/memory/1220-8-0x00000000001D0000-0x00000000001F7000-memory.dmp	upx
behavioral2/memory/3604-9-0x00000000005D0000-0x00000000005F7000-memory.dmp	upx
behavioral2/memory/3604-10-0x00000000005D0000-0x00000000005F7000-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"	9360507f2309692f5cbfd9f3cbfc77c0N.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	9360507f2309692f5cbfd9f3cbfc77c0N.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	1220	9360507f2309692f5cbfd9f3cbfc77c0N.exe
Token: SeDebugPrivilege	3604	AhnSvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1220 wrote to memory of 3604	1220	9360507f2309692f5cbfd9f3cbfc77c0N.exe	84
PID 1220 wrote to memory of 3604	1220	9360507f2309692f5cbfd9f3cbfc77c0N.exe	84
PID 1220 wrote to memory of 3604	1220	9360507f2309692f5cbfd9f3cbfc77c0N.exe	84
PID 1220 wrote to memory of 4376	1220	9360507f2309692f5cbfd9f3cbfc77c0N.exe	85
PID 1220 wrote to memory of 4376	1220	9360507f2309692f5cbfd9f3cbfc77c0N.exe	85
PID 1220 wrote to memory of 4376	1220	9360507f2309692f5cbfd9f3cbfc77c0N.exe	85

C:\Users\Admin\AppData\Local\Temp\9360507f2309692f5cbfd9f3cbfc77c0N.exe
"C:\Users\Admin\AppData\Local\Temp\9360507f2309692f5cbfd9f3cbfc77c0N.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:1220
- 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:3604
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del /q "C:\Users\Admin\AppData\Local\Temp\9360507f2309692f5cbfd9f3cbfc77c0N.exe" >> NUL
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4376

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

AhnSvc.exe

Path C:\ProgramData\AhnLab\AhnSvc.exe
Size 59KB
SHA256 ef07b8fdacd471b507b3679baa165383f7bb7492c3536c22e271499f4c2dc9a8
MD5 60cd3a6eeae61976494a4d68dd80d997
SHA1 d7fbc419fe32bc4e3777c187a55291a8b2b33478
SHA512 be96c402401acd1074b37c602cb6fb7c718aeeeb21b279ae07372a75a1433b76c99ead4366a6e4243bcb56213400e756356ed2a8b4caa08bed5c1e77e682b2c1
SSDEEP 1536:3+ZgwRdiE8cO4p1xRjfTvSq5r3ZiIZ4nouy8uh1aQ1:OeodiUO4p13b9HiIeoutuh1aQ1
MD5 SHA1 SHA512 SSDEEP

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memory/1220-0-0x00000000001D0000-0x00000000001F7000-memory.dmp

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memory/1220-8-0x00000000001D0000-0x00000000001F7000-memory.dmp

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memory/3604-4-0x00000000005D0000-0x00000000005F7000-memory.dmp

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memory/3604-9-0x00000000005D0000-0x00000000005F7000-memory.dmp

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memory/3604-10-0x00000000005D0000-0x00000000005F7000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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