90f7b8cb141c3c69e8233c1872bb8e06e7d08ae9973306c579d1e3692b4caf48

Analysis

max time kernel
142s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/02/2024, 22:27

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General

Target

2024-02-28_91cfcf86c336ce45ff097c4741f3e338_cryptolocker.exe
Size

45KB
MD5

91cfcf86c336ce45ff097c4741f3e338
SHA1

617fefe439b6dee809b4839d8c30f4c1f5e3bc77
SHA256

90f7b8cb141c3c69e8233c1872bb8e06e7d08ae9973306c579d1e3692b4caf48
SHA512

90a1bf5119f5e80192cd86ca0433c240b06bb64f3c92623eba232e5b79dff3ee8272e1d71c3c0f7c399cc81f88a66d2ef373f0ff2b1352df2a20b91541d2e253
SSDEEP

768:79inqyNR/QtOOtEvwDpjBKccJVODvcjpEyp9:79mqyNhQMOtEvwDpjBzck6p9

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1432-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023260-13.dat	CryptoLocker_rule2
behavioral2/files/0x0007000000023260-15.dat	CryptoLocker_rule2
behavioral2/memory/1432-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1432-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023260-13.dat	CryptoLocker_set1
behavioral2/files/0x0007000000023260-15.dat	CryptoLocker_set1
behavioral2/memory/1432-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-02-28_91cfcf86c336ce45ff097c4741f3e338_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2024	asih.exe

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 1432 wrote to memory of 2024	1432	2024-02-28_91cfcf86c336ce45ff097c4741f3e338_cryptolocker.exe	97
PID 1432 wrote to memory of 2024	1432	2024-02-28_91cfcf86c336ce45ff097c4741f3e338_cryptolocker.exe	97
PID 1432 wrote to memory of 2024	1432	2024-02-28_91cfcf86c336ce45ff097c4741f3e338_cryptolocker.exe	97

C:\Users\Admin\AppData\Local\Temp\2024-02-28_91cfcf86c336ce45ff097c4741f3e338_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_91cfcf86c336ce45ff097c4741f3e338_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1432
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2024

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=4104 --field-trial-handle=2280,i,11703952675008463361,17436195144517971517,262144 --variations-seed-version /prefetch:8
1⤵
PID:3212

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\asih.exe

Filesize
45KB

MD5
25fe21fb489e62422c62196d9156ae7c

SHA1
15b158d171644680ad66acbd8c6b9662bc39f6e1

SHA256
9f3c7f51f29c7c691e982d78e08ccd2c422f4bbd0f6bd47f9d33dee4ee531c25

SHA512
4752d931c279ede3346ffbf522259ab1a38054f88408647a3a15e9109efd1225cc89ab8346e3fd1b12aed5907649263f56755d33afd19ab5ce8d12f4ca4cf226

Download Submit
memory/1432-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1432-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1432-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1432-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1432-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2024-18-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2024-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download