1a0950b696affe85af0e7f8bc9aee42d6db6f4ef95f5499f7a32dfa4c94ead1c

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240319-en
resource tags

arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
submitted
28-03-2024 11:55

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General

Target

2024-03-28_d923d9570be95c9da55eda369b5ceef4_cryptolocker.exe
Size

80KB
MD5

d923d9570be95c9da55eda369b5ceef4
SHA1

23d4667c311436ce9263e9cf9bf66350e829ffa1
SHA256

1a0950b696affe85af0e7f8bc9aee42d6db6f4ef95f5499f7a32dfa4c94ead1c
SHA512

56c74493ccf3b0968e35bdf93388f36a9dd767ba6ece7f3e7f651a49db2029491b7e40eec4cc8cf06c9c52dd29fbd1dc379593007e4769570a06ba12a4eb8735
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdp:T6a+rdOOtEvwDpjNtv

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2092-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000001db72-13.dat	CryptoLocker_rule2
behavioral2/memory/2092-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1344-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2092-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000400000001db72-13.dat	CryptoLocker_set1
behavioral2/memory/2092-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1344-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2092-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000400000001db72-13.dat	UPX
behavioral2/memory/2092-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1344-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

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-1-5-21-817259280-2658881748-983986378-1000\Control Panel\International\Geo\Nation	2024-03-28_d923d9570be95c9da55eda369b5ceef4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1344	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2092-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000400000001db72-13.dat	upx
behavioral2/memory/2092-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1344-26-0x0000000000500000-0x0000000000510000-memory.dmp	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 2092 wrote to memory of 1344	2092	2024-03-28_d923d9570be95c9da55eda369b5ceef4_cryptolocker.exe	94
PID 2092 wrote to memory of 1344	2092	2024-03-28_d923d9570be95c9da55eda369b5ceef4_cryptolocker.exe	94
PID 2092 wrote to memory of 1344	2092	2024-03-28_d923d9570be95c9da55eda369b5ceef4_cryptolocker.exe	94

C:\Users\Admin\AppData\Local\Temp\2024-03-28_d923d9570be95c9da55eda369b5ceef4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_d923d9570be95c9da55eda369b5ceef4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2092
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1344

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=1060 --field-trial-handle=2292,i,2927097380497635931,2014459809064723663,262144 --variations-seed-version /prefetch:8
1⤵
PID:780

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

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Downloads

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

Filesize
80KB

MD5
a0b20d32fc8b3a1967bac99a697ef900

SHA1
cd522f93f6747f145e51919733b67a1d03d99867

SHA256
43530b1ac98566fe149f09c9f5f7b92867429e22ba758288ebbb9b3767476de7

SHA512
18b287e4c01a611c8abc43d5e66d5b05f554340748629704d9a6cdb6727e05e4c2b71cebcb0b39bfef86e5db38fc7349584b3190a306e39143e566ddf844f15f

Download Submit
memory/1344-19-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/1344-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1344-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2092-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2092-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2092-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2092-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/2092-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download