d851b8e2f7605c10879b91401bc3f9259fc97dd82a9969bcea2c44b54359c60f

General

Target
d851b8e2f7605c10879b91401bc3f9259fc97dd82a9969bcea2c44b54359c60f.exe
Size 59KB
Sample241114-dp9v8stflp
SHA256 d851b8e2f7605c10879b91401bc3f9259fc97dd82a9969bcea2c44b54359c60f
MD5 d7fcd4512239cf12109771ae5861c9f7
SHA1 52a557449ef122a1b7c8c26212b3eb2531e30efc
SHA512 b83bbd68d98cc43fd41d2b1bcdba100b5aab864a0e50d46a12156951e7b925023abbc69dc3e8cd50a92fa69b6f847ced7551b2d4a40683993ca2f7259e3ff376
SSDEEP 1536:3+ZgwRdiE8cO4p1xRjfTvSq5r3ZiIZ4nouy8uh1aQI:OeodiUO4p13b9HiIeoutuh1aQI
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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	d851b8e2f7605c10879b91401bc3f9259fc97dd82a9969bcea2c44b54359c60f.exe

Executes dropped EXE 1 IoCs

pid	Process
4492	AhnSvc.exe

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"	d851b8e2f7605c10879b91401bc3f9259fc97dd82a9969bcea2c44b54359c60f.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

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2040-0-0x00000000003D0000-0x00000000003F7000-memory.dmp	upx
behavioral2/files/0x0008000000023c5f-3.dat	upx
behavioral2/memory/4492-4-0x0000000000630000-0x0000000000657000-memory.dmp	upx
behavioral2/memory/2040-9-0x00000000003D0000-0x00000000003F7000-memory.dmp	upx
behavioral2/memory/4492-10-0x0000000000630000-0x0000000000657000-memory.dmp	upx
behavioral2/memory/4492-11-0x0000000000630000-0x0000000000657000-memory.dmp	upx

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	d851b8e2f7605c10879b91401bc3f9259fc97dd82a9969bcea2c44b54359c60f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AhnSvc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2040	d851b8e2f7605c10879b91401bc3f9259fc97dd82a9969bcea2c44b54359c60f.exe
Token: SeDebugPrivilege	4492	AhnSvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2040 wrote to memory of 4492	2040	d851b8e2f7605c10879b91401bc3f9259fc97dd82a9969bcea2c44b54359c60f.exe	83
PID 2040 wrote to memory of 4492	2040	d851b8e2f7605c10879b91401bc3f9259fc97dd82a9969bcea2c44b54359c60f.exe	83
PID 2040 wrote to memory of 4492	2040	d851b8e2f7605c10879b91401bc3f9259fc97dd82a9969bcea2c44b54359c60f.exe	83
PID 2040 wrote to memory of 4820	2040	d851b8e2f7605c10879b91401bc3f9259fc97dd82a9969bcea2c44b54359c60f.exe	86
PID 2040 wrote to memory of 4820	2040	d851b8e2f7605c10879b91401bc3f9259fc97dd82a9969bcea2c44b54359c60f.exe	86
PID 2040 wrote to memory of 4820	2040	d851b8e2f7605c10879b91401bc3f9259fc97dd82a9969bcea2c44b54359c60f.exe	86

C:\Users\Admin\AppData\Local\Temp\d851b8e2f7605c10879b91401bc3f9259fc97dd82a9969bcea2c44b54359c60f.exe
"C:\Users\Admin\AppData\Local\Temp\d851b8e2f7605c10879b91401bc3f9259fc97dd82a9969bcea2c44b54359c60f.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:2040
- 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:4492
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del /q "C:\Users\Admin\AppData\Local\Temp\d851b8e2f7605c10879b91401bc3f9259fc97dd82a9969bcea2c44b54359c60f.exe" >> NUL
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4820

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 083f10d48daf2c4a41d37cc6676469820811c922bd1182bcb3e5cc6213b58071
MD5 fe550bcab2e7ccd51fb16e7d36ccb0d8
SHA1 1dd3bbfa3312ee7565590a5c2759c784a14ed9b4
SHA512 13ca188dc04d9be74d60db1b11a575f9dba7f562bac6c3a211e1614aace31f2ff20660c4bb9a20ec6db43c8ab668c22e4d40114194b70467445a1b6b74afe0b0
SSDEEP 1536:3+ZgwRdiE8cO4p1xRjfTvSq5r3ZiIZ4nouy8uh1aQw:OeodiUO4p13b9HiIeoutuh1aQw
MD5 SHA1 SHA512 SSDEEP

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memory/2040-0-0x00000000003D0000-0x00000000003F7000-memory.dmp

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memory/2040-9-0x00000000003D0000-0x00000000003F7000-memory.dmp

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memory/4492-4-0x0000000000630000-0x0000000000657000-memory.dmp

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memory/4492-10-0x0000000000630000-0x0000000000657000-memory.dmp

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memory/4492-11-0x0000000000630000-0x0000000000657000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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