453e1cd458b611c1d6d22e983e77d46e32794968dd03d44ae66c0ab0bd9cb29d

Analysis

max time kernel
185s
max time network
192s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
27-11-2022 16:11

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General

Target

453e1cd458b611c1d6d22e983e77d46e32794968dd03d44ae66c0ab0bd9cb29d.exe
Size

27KB
MD5

df9d565d73b0056164e8da08add34b13
SHA1

5dd2ba3a2439c280ddd5f801f324d51514769c1f
SHA256

453e1cd458b611c1d6d22e983e77d46e32794968dd03d44ae66c0ab0bd9cb29d
SHA512

b7273576f2b51a2f236fdb4323a910bcf39c1d6c36e1632df7813436c5b229911ddd574425663a47318dcb2eb64aa2aa71772a0e597234c6a23d823982f5ad1a
SSDEEP

768:j3Fw6kjiBCwd1+L0mNvjaRziDG/jDQjjmWTe+Hc94stg:r8mJP+L0mNvjaRziDG/jDQjjmW9Hc9D+

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

Cythosia.exe

pid process

1364 Cythosia.exe

pid	process
1364	Cythosia.exe

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

Processes:

453e1cd458b611c1d6d22e983e77d46e32794968dd03d44ae66c0ab0bd9cb29d.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	453e1cd458b611c1d6d22e983e77d46e32794968dd03d44ae66c0ab0bd9cb29d.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

453e1cd458b611c1d6d22e983e77d46e32794968dd03d44ae66c0ab0bd9cb29d.exeCythosia.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Cythosia = "C:\\Users\\Admin\\AppData\\Roaming\\App Data\\Cythosia.exe"	453e1cd458b611c1d6d22e983e77d46e32794968dd03d44ae66c0ab0bd9cb29d.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Cythosia = "C:\\Users\\Admin\\AppData\\Roaming\\App Data\\Cythosia.exe"	Cythosia.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 2 IoCs

Processes:

453e1cd458b611c1d6d22e983e77d46e32794968dd03d44ae66c0ab0bd9cb29d.exeCythosia.exe

description	pid	process
Token: SeDebugPrivilege	4088	453e1cd458b611c1d6d22e983e77d46e32794968dd03d44ae66c0ab0bd9cb29d.exe
Token: SeDebugPrivilege	1364	Cythosia.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

453e1cd458b611c1d6d22e983e77d46e32794968dd03d44ae66c0ab0bd9cb29d.exe

description	pid	process	target process
PID 4088 wrote to memory of 1364	4088	453e1cd458b611c1d6d22e983e77d46e32794968dd03d44ae66c0ab0bd9cb29d.exe	Cythosia.exe
PID 4088 wrote to memory of 1364	4088	453e1cd458b611c1d6d22e983e77d46e32794968dd03d44ae66c0ab0bd9cb29d.exe	Cythosia.exe

C:\Users\Admin\AppData\Local\Temp\453e1cd458b611c1d6d22e983e77d46e32794968dd03d44ae66c0ab0bd9cb29d.exe
"C:\Users\Admin\AppData\Local\Temp\453e1cd458b611c1d6d22e983e77d46e32794968dd03d44ae66c0ab0bd9cb29d.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4088

C:\Users\Admin\AppData\Roaming\App Data\Cythosia.exe
"C:\Users\Admin\AppData\Roaming\App Data\Cythosia.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
PID:1364

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\App Data\Cythosia.exe
Filesize
27KB

MD5
df9d565d73b0056164e8da08add34b13

SHA1
5dd2ba3a2439c280ddd5f801f324d51514769c1f

SHA256
453e1cd458b611c1d6d22e983e77d46e32794968dd03d44ae66c0ab0bd9cb29d

SHA512
b7273576f2b51a2f236fdb4323a910bcf39c1d6c36e1632df7813436c5b229911ddd574425663a47318dcb2eb64aa2aa71772a0e597234c6a23d823982f5ad1a

Download Submit
C:\Users\Admin\AppData\Roaming\App Data\Cythosia.exe
Filesize
27KB

MD5
df9d565d73b0056164e8da08add34b13

SHA1
5dd2ba3a2439c280ddd5f801f324d51514769c1f

SHA256
453e1cd458b611c1d6d22e983e77d46e32794968dd03d44ae66c0ab0bd9cb29d

SHA512
b7273576f2b51a2f236fdb4323a910bcf39c1d6c36e1632df7813436c5b229911ddd574425663a47318dcb2eb64aa2aa71772a0e597234c6a23d823982f5ad1a

Download Submit
memory/1364-133-0x0000000000000000-mapping.dmp

Download
memory/1364-137-0x00007FFC13A90000-0x00007FFC14551000-memory.dmp

Filesize
10.8MB

Download
memory/1364-138-0x00007FFC13A90000-0x00007FFC14551000-memory.dmp

Filesize
10.8MB

Download
memory/4088-132-0x0000000000AB0000-0x0000000000ABE000-memory.dmp

Filesize
56KB

Download
memory/4088-136-0x00007FFC13A90000-0x00007FFC14551000-memory.dmp

Filesize
10.8MB

Download