f8ccba2118987f2821435a20dd13daf91a72f59f33cbec96351e2727e09c24a2

General

Target

f8ccba2118987f2821435a20dd13daf91a72f59f33cbec96351e2727e09c24a2.exe
Size

40KB
MD5

b14284606dc7b84a30dba0b6c5d80d18
SHA1

b94b71791130b85c5abdc87baec8fb0072f8e129
SHA256

f8ccba2118987f2821435a20dd13daf91a72f59f33cbec96351e2727e09c24a2
SHA512

f3c0fc7f30f0372f425337ef3f332403ccacc57bbc654ea509c050136350d9dafa105b2694aa05ee41ce6f7c6c8832834953cfad79a26b3efc35f70022bb1625
SSDEEP

768:Isjij9x9ZP+tF9yE4UzoNHyg+Kv9cL7THM:I2IWbhzIHSKv9cL7Q

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1652	winlogon.exe

Loads dropped DLL 2 IoCs

pid	Process
1508	f8ccba2118987f2821435a20dd13daf91a72f59f33cbec96351e2727e09c24a2.exe
1508	f8ccba2118987f2821435a20dd13daf91a72f59f33cbec96351e2727e09c24a2.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run	winlogon.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run\NVIDIA Media Center Library = "C:\\Users\\Admin\\Admin1\\winlogon.exe"	winlogon.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	winlogon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\NVIDIA Media Center Library = "C:\\Users\\Admin\\Admin1\\winlogon.exe"	winlogon.exe

Enumerates connected drives 3 TTPs 24 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\W:	winlogon.exe
File opened (read-only)	\??\Y:	winlogon.exe
File opened (read-only)	\??\B:	winlogon.exe
File opened (read-only)	\??\F:	winlogon.exe
File opened (read-only)	\??\K:	winlogon.exe
File opened (read-only)	\??\N:	winlogon.exe
File opened (read-only)	\??\X:	winlogon.exe
File opened (read-only)	\??\L:	winlogon.exe
File opened (read-only)	\??\Q:	winlogon.exe
File opened (read-only)	\??\S:	winlogon.exe
File opened (read-only)	\??\U:	winlogon.exe
File opened (read-only)	\??\Z:	winlogon.exe
File opened (read-only)	\??\G:	winlogon.exe
File opened (read-only)	\??\I:	winlogon.exe
File opened (read-only)	\??\J:	winlogon.exe
File opened (read-only)	\??\O:	winlogon.exe
File opened (read-only)	\??\P:	winlogon.exe
File opened (read-only)	\??\R:	winlogon.exe
File opened (read-only)	\??\T:	winlogon.exe
File opened (read-only)	\??\V:	winlogon.exe
File opened (read-only)	\??\A:	winlogon.exe
File opened (read-only)	\??\E:	winlogon.exe
File opened (read-only)	\??\H:	winlogon.exe
File opened (read-only)	\??\M:	winlogon.exe

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

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
1508	f8ccba2118987f2821435a20dd13daf91a72f59f33cbec96351e2727e09c24a2.exe
1508	f8ccba2118987f2821435a20dd13daf91a72f59f33cbec96351e2727e09c24a2.exe
1652	winlogon.exe
1652	winlogon.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1508 wrote to memory of 1652	1508	f8ccba2118987f2821435a20dd13daf91a72f59f33cbec96351e2727e09c24a2.exe	26
PID 1508 wrote to memory of 1652	1508	f8ccba2118987f2821435a20dd13daf91a72f59f33cbec96351e2727e09c24a2.exe	26
PID 1508 wrote to memory of 1652	1508	f8ccba2118987f2821435a20dd13daf91a72f59f33cbec96351e2727e09c24a2.exe	26
PID 1508 wrote to memory of 1652	1508	f8ccba2118987f2821435a20dd13daf91a72f59f33cbec96351e2727e09c24a2.exe	26

C:\Users\Admin\AppData\Local\Temp\f8ccba2118987f2821435a20dd13daf91a72f59f33cbec96351e2727e09c24a2.exe
"C:\Users\Admin\AppData\Local\Temp\f8ccba2118987f2821435a20dd13daf91a72f59f33cbec96351e2727e09c24a2.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1508
- C:\Users\Admin\Admin1\winlogon.exe
  "C:\Users\Admin\Admin1\winlogon.exe" 0
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Enumerates connected drives
  - Suspicious use of SetWindowsHookEx
  PID:1652

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\Admin1\winlogon.exe

Filesize
40KB

MD5
b14284606dc7b84a30dba0b6c5d80d18

SHA1
b94b71791130b85c5abdc87baec8fb0072f8e129

SHA256
f8ccba2118987f2821435a20dd13daf91a72f59f33cbec96351e2727e09c24a2

SHA512
f3c0fc7f30f0372f425337ef3f332403ccacc57bbc654ea509c050136350d9dafa105b2694aa05ee41ce6f7c6c8832834953cfad79a26b3efc35f70022bb1625

Download Submit
\Users\Admin\Admin1\winlogon.exe

Filesize
40KB

MD5
b14284606dc7b84a30dba0b6c5d80d18

SHA1
b94b71791130b85c5abdc87baec8fb0072f8e129

SHA256
f8ccba2118987f2821435a20dd13daf91a72f59f33cbec96351e2727e09c24a2

SHA512
f3c0fc7f30f0372f425337ef3f332403ccacc57bbc654ea509c050136350d9dafa105b2694aa05ee41ce6f7c6c8832834953cfad79a26b3efc35f70022bb1625

Download Submit
\Users\Admin\Admin1\winlogon.exe

Filesize
40KB

MD5
b14284606dc7b84a30dba0b6c5d80d18

SHA1
b94b71791130b85c5abdc87baec8fb0072f8e129

SHA256
f8ccba2118987f2821435a20dd13daf91a72f59f33cbec96351e2727e09c24a2

SHA512
f3c0fc7f30f0372f425337ef3f332403ccacc57bbc654ea509c050136350d9dafa105b2694aa05ee41ce6f7c6c8832834953cfad79a26b3efc35f70022bb1625

Download Submit
memory/1508-57-0x0000000075451000-0x0000000075453000-memory.dmp

Filesize
8KB

Download

Analysis

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