dd0d1167afd519fbeac4f674f06282588c99c576115f690cbe5afd339c0d5f23

Analysis

max time kernel
131s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05-04-2024 04:25

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General

Target

2024-04-05_3395737fecd2793ed399afa642a562fd_cryptolocker.exe
Size

58KB
MD5

3395737fecd2793ed399afa642a562fd
SHA1

5bca4f381db58559f2411f32fb2ff8afc25c8383
SHA256

dd0d1167afd519fbeac4f674f06282588c99c576115f690cbe5afd339c0d5f23
SHA512

2373c28c22666cd62c12cf2005397b0a22f7436238cf089da7970c61a27cfbf16750c2576f0e4f47f8e10362cebade68f992c438fdb26b4468f19a63e9bdc868
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYa59Rl:z6a+CdOOtEvwDpjQd

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1760-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023323-13.dat	CryptoLocker_rule2
behavioral2/memory/1760-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3360-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1760-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023323-13.dat	CryptoLocker_set1
behavioral2/memory/1760-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3360-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1760-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023323-13.dat	UPX
behavioral2/memory/1760-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3360-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	2024-04-05_3395737fecd2793ed399afa642a562fd_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3360	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1760-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023323-13.dat	upx
behavioral2/memory/1760-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3360-26-0x0000000000500000-0x0000000000510000-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 1760 wrote to memory of 3360	1760	2024-04-05_3395737fecd2793ed399afa642a562fd_cryptolocker.exe	95
PID 1760 wrote to memory of 3360	1760	2024-04-05_3395737fecd2793ed399afa642a562fd_cryptolocker.exe	95
PID 1760 wrote to memory of 3360	1760	2024-04-05_3395737fecd2793ed399afa642a562fd_cryptolocker.exe	95

C:\Users\Admin\AppData\Local\Temp\2024-04-05_3395737fecd2793ed399afa642a562fd_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-05_3395737fecd2793ed399afa642a562fd_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1760
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3360

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=4068 --field-trial-handle=2272,i,1589057049575649654,2929151440327217574,262144 --variations-seed-version /prefetch:8
1⤵
PID:2300

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
58KB

MD5
ad88db1b7fa5835bc76017c065e7c40b

SHA1
313112b1786a74787abe4ede818f3f5f6d0cb250

SHA256
25e2a8a1132ed0ffb68256e52744f99ea8371962deede719096251f7ccba6df8

SHA512
2e078496f076c1d3acb8b2e25466e6840f7cfa2af7f82adf29c629d4224849488c09cc33b1b873da17636d2161a7e28d6e9dc238a8aa7a10247b94d9c4db3b5e

Download Submit
memory/1760-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1760-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1760-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/1760-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/1760-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3360-19-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3360-22-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3360-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download