3c5f8cb08c9304a4926891598e294dbdb403b30102079b324aeb2a98a5297383

General

Target

3c5f8cb08c9304a4926891598e294dbdb403b30102079b324aeb2a98a5297383.exe
Size

193KB
MD5

67af7bfc251b66e12da5d08a1e45fba0
SHA1

67b7a665847884f855321b33136052bdc9fc4b72
SHA256

3c5f8cb08c9304a4926891598e294dbdb403b30102079b324aeb2a98a5297383
SHA512

a7e62bd841be84f4f66a3e99a7191ffa554c6ba488b895f3e23d04c11da9128650cf142589a98fc6ae51fd22ae4c6807bf3e538797271e0ecb755e98e8fd52fb
SSDEEP

3072:YNObDvd2vvqgZ9nhEDAVIonwz8WNvjQH2vOBkvuHozZhDHKW4d6Enial0WRBAgVI:YBvvqgZ9nh2jQH2WBSURzlBjI

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1616	yahoo.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
1972	netsh.exe

Loads dropped DLL 1 IoCs

pid	Process
948	3c5f8cb08c9304a4926891598e294dbdb403b30102079b324aeb2a98a5297383.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\f82f07d693f4fdc41f8dd7242df85d3f = "\"C:\\ProgramData\\yahoo.exe\" .."	yahoo.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\f82f07d693f4fdc41f8dd7242df85d3f = "\"C:\\ProgramData\\yahoo.exe\" .."	yahoo.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 AdjustPrivilegeToken 19 IoCs

description	pid	Process
Token: SeDebugPrivilege	1616	yahoo.exe
Token: 33	1616	yahoo.exe
Token: SeIncBasePriorityPrivilege	1616	yahoo.exe
Token: 33	1616	yahoo.exe
Token: SeIncBasePriorityPrivilege	1616	yahoo.exe
Token: 33	1616	yahoo.exe
Token: SeIncBasePriorityPrivilege	1616	yahoo.exe
Token: 33	1616	yahoo.exe
Token: SeIncBasePriorityPrivilege	1616	yahoo.exe
Token: 33	1616	yahoo.exe
Token: SeIncBasePriorityPrivilege	1616	yahoo.exe
Token: 33	1616	yahoo.exe
Token: SeIncBasePriorityPrivilege	1616	yahoo.exe
Token: 33	1616	yahoo.exe
Token: SeIncBasePriorityPrivilege	1616	yahoo.exe
Token: 33	1616	yahoo.exe
Token: SeIncBasePriorityPrivilege	1616	yahoo.exe
Token: 33	1616	yahoo.exe
Token: SeIncBasePriorityPrivilege	1616	yahoo.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 948 wrote to memory of 1616	948	3c5f8cb08c9304a4926891598e294dbdb403b30102079b324aeb2a98a5297383.exe	28
PID 948 wrote to memory of 1616	948	3c5f8cb08c9304a4926891598e294dbdb403b30102079b324aeb2a98a5297383.exe	28
PID 948 wrote to memory of 1616	948	3c5f8cb08c9304a4926891598e294dbdb403b30102079b324aeb2a98a5297383.exe	28
PID 948 wrote to memory of 1616	948	3c5f8cb08c9304a4926891598e294dbdb403b30102079b324aeb2a98a5297383.exe	28
PID 1616 wrote to memory of 1972	1616	yahoo.exe	29
PID 1616 wrote to memory of 1972	1616	yahoo.exe	29
PID 1616 wrote to memory of 1972	1616	yahoo.exe	29
PID 1616 wrote to memory of 1972	1616	yahoo.exe	29

C:\Users\Admin\AppData\Local\Temp\3c5f8cb08c9304a4926891598e294dbdb403b30102079b324aeb2a98a5297383.exe
"C:\Users\Admin\AppData\Local\Temp\3c5f8cb08c9304a4926891598e294dbdb403b30102079b324aeb2a98a5297383.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:948
- C:\ProgramData\yahoo.exe
  "C:\ProgramData\yahoo.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1616
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\ProgramData\yahoo.exe" "yahoo.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:1972

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\yahoo.exe

Filesize
193KB

MD5
67af7bfc251b66e12da5d08a1e45fba0

SHA1
67b7a665847884f855321b33136052bdc9fc4b72

SHA256
3c5f8cb08c9304a4926891598e294dbdb403b30102079b324aeb2a98a5297383

SHA512
a7e62bd841be84f4f66a3e99a7191ffa554c6ba488b895f3e23d04c11da9128650cf142589a98fc6ae51fd22ae4c6807bf3e538797271e0ecb755e98e8fd52fb

Download Submit
C:\ProgramData\yahoo.exe

Filesize
193KB

MD5
67af7bfc251b66e12da5d08a1e45fba0

SHA1
67b7a665847884f855321b33136052bdc9fc4b72

SHA256
3c5f8cb08c9304a4926891598e294dbdb403b30102079b324aeb2a98a5297383

SHA512
a7e62bd841be84f4f66a3e99a7191ffa554c6ba488b895f3e23d04c11da9128650cf142589a98fc6ae51fd22ae4c6807bf3e538797271e0ecb755e98e8fd52fb

Download Submit
\ProgramData\yahoo.exe

Filesize
193KB

MD5
67af7bfc251b66e12da5d08a1e45fba0

SHA1
67b7a665847884f855321b33136052bdc9fc4b72

SHA256
3c5f8cb08c9304a4926891598e294dbdb403b30102079b324aeb2a98a5297383

SHA512
a7e62bd841be84f4f66a3e99a7191ffa554c6ba488b895f3e23d04c11da9128650cf142589a98fc6ae51fd22ae4c6807bf3e538797271e0ecb755e98e8fd52fb

Download Submit
memory/948-54-0x0000000075DA1000-0x0000000075DA3000-memory.dmp

Filesize
8KB

Download
memory/948-55-0x0000000074290000-0x000000007483B000-memory.dmp

Filesize
5.7MB

Download
memory/948-61-0x0000000074290000-0x000000007483B000-memory.dmp

Filesize
5.7MB

Download
memory/1616-62-0x0000000074290000-0x000000007483B000-memory.dmp

Filesize
5.7MB

Download
memory/1616-65-0x0000000074290000-0x000000007483B000-memory.dmp

Filesize
5.7MB

Download

Analysis

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