c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712

General

Target

c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe
Size

339KB
MD5

a0b104993989f0fa5fab4695b577a161
SHA1

b899e5e6a3e6565430711171754264fefcbe919b
SHA256

c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712
SHA512

c8ceb3f1174547c15cdfc6eb435f58e25e0d9397bc34e79c12ac60f3661210bcf7490150599b370a37a8d67f3f1f14f11f0233ce3104718606f2d7ea4c3317e4
SSDEEP

6144:ztvBPnU1b7e9SQii1EkoNlhlrQ2ZrM2xdkVThvtZKfbBeu/y5gJp:Zv1nWdQP1EDhZPxdsqbB//wgL

Score

7^/10

persistence

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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe

Executes dropped EXE 2 IoCs

pid	Process
4716	Isass.exe
2216	XO_c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe

Adds Run key to start application 2 TTPs 2 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\Isass.exe = "C:\\Program Files (x86)\\Microsoft Build\\Isass.exe"	c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Isass.exe = "C:\\Program Files (x86)\\Microsoft Build\\Isass.exe"	c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Microsoft Build\Isass.exe	c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1572	c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe
1572	c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe
4716	Isass.exe
4716	Isass.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1572 wrote to memory of 4716	1572	c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe	85
PID 1572 wrote to memory of 4716	1572	c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe	85
PID 1572 wrote to memory of 4716	1572	c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe	85
PID 1572 wrote to memory of 2216	1572	c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe	86
PID 1572 wrote to memory of 2216	1572	c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe	86
PID 1572 wrote to memory of 2216	1572	c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe	86

C:\Users\Admin\AppData\Local\Temp\c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe
"C:\Users\Admin\AppData\Local\Temp\c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1572
- C:\Program Files (x86)\Microsoft Build\Isass.exe
  "C:\Program Files (x86)\Microsoft Build\Isass.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  PID:4716
- C:\Users\Admin\AppData\Local\Temp\XO_c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe
  "C:\Users\Admin\AppData\Local\Temp\XO_c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe"
  2⤵
  - Executes dropped EXE
  PID:2216

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

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Microsoft Build\Isass.exe

Filesize
213KB

MD5
fc5a9e156771014db7425b68ccc1c586

SHA1
3ccdc5ce4c904d1f0ac4c9ec487a3a59e65e9b94

SHA256
003aedd82b28141851731c90e70025b6fcec9e083c0947a5cad3e74feaa8043a

SHA512
4cd4d1bec4b5500c2fced74f10cbf46fd31b7025c5e224d9374bdd2bc0f78e334e69eb37f72b897414f1129ed68006e7fcbcaceb7bb094cc176720e952bd1337

Download Submit
C:\ProgramData\Adobe\Setup\{AC76BA86-7AD7-1033-7B44-AC0F074E4100}\setup.exe

Filesize
693KB

MD5
fdf183d3910e6b22f952c753b2f75068

SHA1
fb2c1ddab01d71f4946a64166d2a52d3557db63f

SHA256
e231010d3ac5eb4c71a6d3a466052af7d21ad7bb5d023aa0a32c9b1a99c57c3f

SHA512
77b9a0afed3e5adae88e6e7ef4ae4bb92a496cf87b8e1ad88e794fbecfc97465d04c0d300bceab958f877b096e402be65ba3939faee6769540b8bf6d4b6c6793

Download Submit
C:\Users\Admin\AppData\Local\Temp\XO_c39cdfb82a535bbc19e54ef1b552868fa0f0de1ddfd6569f4ec451baeee5a712.exe

Filesize
64KB

MD5
e97c622b03fb2a2598bf019fbbe29f2c

SHA1
32698bd1d3a0ff6cf441770d1b2b816285068d19

SHA256
5c1af46c7300e87a73dacf6cf41ce397e3f05df6bd9c7e227b4ac59f85769160

SHA512
db70c62fb35a8e5b005f13b57c1ebbf6c465f6ff0524422294c43e27fb4aa79379dc1e300ad11dc2354405c43b192ae06b91c0f525a1f2617e4d14673651a87d

Download Submit
memory/1572-16-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/1572-4-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/1572-12-0x0000000001C60000-0x0000000001C61000-memory.dmp

Filesize
4KB

Download
memory/4716-20-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4716-34-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4716-18-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4716-19-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4716-7-0x0000000003410000-0x0000000003411000-memory.dmp

Filesize
4KB

Download
memory/4716-23-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4716-6-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4716-26-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4716-33-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4716-17-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4716-35-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4716-36-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4716-47-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4716-50-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4716-61-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4716-62-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download
memory/4716-63-0x0000000000400000-0x00000000016A7000-memory.dmp

Filesize
18.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads