710fe2f4949de03df1cd0707e2e0eef19ad8122c83130ca8d08238ec943321e3

Analysis

max time kernel
135s
max time network
131s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 02:34

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General

Target

2024-05-23_8bea09dcbb2ccfa4dc15967ee0a0263d_cryptolocker.exe
Size

63KB
MD5

8bea09dcbb2ccfa4dc15967ee0a0263d
SHA1

a54b08a09b970ba8c10e5ed72d374a9ebf167fa4
SHA256

710fe2f4949de03df1cd0707e2e0eef19ad8122c83130ca8d08238ec943321e3
SHA512

e6227c84aaf4a1372e8bc16c96e089f6b542584e256e8d801dc3bb0c9c75b86fed1c9de148bc960e27ec925bdf1efbf9fe25e09a057470c5e618a6b802d60816
SSDEEP

1536:btB9g/xtCSKfxLIc//Xr+/AO/kIZ3ft2nVuTKB6nggOlHdUHZnF7H+:btng54SMLr+/AO/kIhfoKMHdac

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\gewos.exe	CryptoLocker_rule2

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

2024-05-23_8bea09dcbb2ccfa4dc15967ee0a0263d_cryptolocker.exegewos.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-23_8bea09dcbb2ccfa4dc15967ee0a0263d_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

Processes:

gewos.exe

pid process

4468 gewos.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4468	gewos.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_8bea09dcbb2ccfa4dc15967ee0a0263d_cryptolocker.exe

description	pid	process	target process
PID 208 wrote to memory of 4468	208	2024-05-23_8bea09dcbb2ccfa4dc15967ee0a0263d_cryptolocker.exe	gewos.exe
PID 208 wrote to memory of 4468	208	2024-05-23_8bea09dcbb2ccfa4dc15967ee0a0263d_cryptolocker.exe	gewos.exe
PID 208 wrote to memory of 4468	208	2024-05-23_8bea09dcbb2ccfa4dc15967ee0a0263d_cryptolocker.exe	gewos.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_8bea09dcbb2ccfa4dc15967ee0a0263d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_8bea09dcbb2ccfa4dc15967ee0a0263d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:208

C:\Users\Admin\AppData\Local\Temp\gewos.exe
"C:\Users\Admin\AppData\Local\Temp\gewos.exe"
2⤵
- Checks computer location settings
- Executes dropped EXE
PID:4468

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=3728,i,14221647728265121051,6840906015709541562,262144 --variations-seed-version --mojo-platform-channel-handle=4092 /prefetch:8
1⤵
PID:1256

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\gewos.exe
Filesize
63KB

MD5
a885f23ed6115216cc9521a96ebc038a

SHA1
b42c30f3bbf9b08cc97e87b752f9ff42825d6f6a

SHA256
178f924fd5280fadf226efa84f99afc6273e87699a5fa08ca9b09e4802033356

SHA512
66efe4c94077135d23900c001efeaa945afc795e650f7cb576406e27506e45da4d96dd1c12203c31faa9ae526ba33fe1ee502ad4cb4370104d7dd28523ed8bf6

Download Submit
C:\Users\Admin\AppData\Local\Temp\gewosik.exe
Filesize
185B

MD5
014334f3f64a62f907cbddcb56562cf5

SHA1
f5be0e9f9d5af077e001304423684ba3db10c75b

SHA256
545bad02acb5fe97b31ecf8fe5da699b51dd2f3b555bab9f7ed268a360b2943f

SHA512
3a4e625581a1928b63684a68dc33936cd9bdb49369c0ab7876404bc1a01141a19eb6edd203e49d52a1cf6163db76f9b0e4c148e3f52f38eca3f3f6a429ff1bda

Download Submit
memory/208-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/208-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/208-8-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4468-25-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download