44cef6352840cf2e76a06c0c90fff6953672134b86afb1f7e12a76c61fcde35c

Analysis

max time kernel
142s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26-03-2024 22:39

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General

Target

2024-03-26_b952bf7eeadd37b40eaf680830b7859a_cryptolocker.exe
Size

84KB
MD5

b952bf7eeadd37b40eaf680830b7859a
SHA1

1a583b1c89d5310cc98b60b271312fc8f1b3e8f5
SHA256

44cef6352840cf2e76a06c0c90fff6953672134b86afb1f7e12a76c61fcde35c
SHA512

9cf7194ac0d3fe5a788daa5fc8b7e53b58df58ab6413a2f0f65b55c7ac533435659134230a58491e6e780e04db353855ba14207ba60237dc49d59c24423d9971
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1kyJS1/:zCsanOtEvwDpj1

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3404-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000002271f-13.dat	CryptoLocker_rule2
behavioral2/memory/3404-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2728-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3404-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000400000002271f-13.dat	CryptoLocker_set1
behavioral2/memory/3404-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2728-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3404-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000400000002271f-13.dat	UPX
behavioral2/memory/3404-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2728-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-03-26_b952bf7eeadd37b40eaf680830b7859a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2728	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3404-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000400000002271f-13.dat	upx
behavioral2/memory/3404-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2728-26-0x0000000000500000-0x0000000000510000-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 3404 wrote to memory of 2728	3404	2024-03-26_b952bf7eeadd37b40eaf680830b7859a_cryptolocker.exe	99
PID 3404 wrote to memory of 2728	3404	2024-03-26_b952bf7eeadd37b40eaf680830b7859a_cryptolocker.exe	99
PID 3404 wrote to memory of 2728	3404	2024-03-26_b952bf7eeadd37b40eaf680830b7859a_cryptolocker.exe	99

C:\Users\Admin\AppData\Local\Temp\2024-03-26_b952bf7eeadd37b40eaf680830b7859a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-26_b952bf7eeadd37b40eaf680830b7859a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3404
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:2728

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=4140 --field-trial-handle=3192,i,2785050981002401924,4037047756083432660,262144 --variations-seed-version /prefetch:8
1⤵
PID:796

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\misid.exe

Filesize
84KB

MD5
742221c07d3a27681165c1256e39e4b4

SHA1
2f5f6d9e0c14bbeed0eff04d8b0c7f8c144985d7

SHA256
369e02785c86b52d4719feb1dbc3967c6db4c6cc77063f5b2e89ae24af4b7d7c

SHA512
d5dd378bc6e82059ea365bc6a60f83f06dfc41819dbab4f716f20dc55f93e70ff0566d6c3dca377cf50aa3b0c0896307f64cc2881be7d29ebeba2b3e287498ef

Download Submit
memory/2728-19-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2728-20-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/2728-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3404-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3404-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3404-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3404-3-0x0000000002230000-0x0000000002236000-memory.dmp

Filesize
24KB

Download
memory/3404-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download