2cf2e12c52cdfb10392e4d376fce074127cd563ac9549257c470666777231346

Analysis

max time kernel
136s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
03/05/2024, 03:51

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General

Target

2024-05-03_b3980de5f74c84bff8bd67a631ddb2d7_cryptolocker.exe
Size

55KB
MD5

b3980de5f74c84bff8bd67a631ddb2d7
SHA1

2d68620928f12df44ebebf37ea81123c7d0d6f7a
SHA256

2cf2e12c52cdfb10392e4d376fce074127cd563ac9549257c470666777231346
SHA512

e2779127e8a5fa6449f0837438e40c8698ca8298a71f78a73490c011d29fb14642065045531a91e736447b0df8b4d9cc70a81b58ebecc04ea8e455fb67b269b6
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjNT:bP9g/xtCS3Dxx04

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

resource	yara_rule
behavioral2/memory/5112-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023263-14.dat	CryptoLocker_rule2

UPX dump on OEP (original entry point) 2 IoCs

resource	yara_rule
behavioral2/memory/5112-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x0008000000023263-14.dat	UPX

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	gewos.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-03_b3980de5f74c84bff8bd67a631ddb2d7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1892	gewos.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/5112-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x0008000000023263-14.dat	upx

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5112 wrote to memory of 1892	5112	2024-05-03_b3980de5f74c84bff8bd67a631ddb2d7_cryptolocker.exe	91
PID 5112 wrote to memory of 1892	5112	2024-05-03_b3980de5f74c84bff8bd67a631ddb2d7_cryptolocker.exe	91
PID 5112 wrote to memory of 1892	5112	2024-05-03_b3980de5f74c84bff8bd67a631ddb2d7_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-05-03_b3980de5f74c84bff8bd67a631ddb2d7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_b3980de5f74c84bff8bd67a631ddb2d7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5112
- 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:1892

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 --mojo-platform-channel-handle=4160 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8
1⤵
PID:3152

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\gewos.exe

Filesize
55KB

MD5
3b99db9a0d32ab3f170edc6ca3c4d7bb

SHA1
7d0647d3881a84832879858852acd1b638c69f15

SHA256
2e9b8b0e1ba568716c6721fe0354041d022e795ddd28b90d9e595d1339d8c11f

SHA512
d655eb1fc8098a0938f60bd32a02e6956d74c78b92846a37de00acf1ea04a38b58f8d382872a3d1c1bd5ec839876861e01f18bb14e80dc9221b02050d7a90063

Download Submit
memory/1892-27-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/5112-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/5112-1-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/5112-2-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/5112-4-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download