74d132d9a207563ce027f94bed0aa9ee88799c0627dd349bdf7be980c0807272

Analysis

max time kernel
142s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
16/04/2024, 09:38

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General

Target

2024-04-16_ac576ab5b8a43b4586435e4aac603a3a_cryptolocker.exe
Size

95KB
MD5

ac576ab5b8a43b4586435e4aac603a3a
SHA1

fb364b93d0ab66e90a3740dbf45baf9ac604abc8
SHA256

74d132d9a207563ce027f94bed0aa9ee88799c0627dd349bdf7be980c0807272
SHA512

a441e61cb60760a560247e41fea3be49aea15f3dcc36c9399a85fa9eaa665f0a852877db71fc8831095933d05490c18b5a2fbd6f7ead9614951279b83591d9b3
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/b/:zCsanOtEvwDpjB7

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2432-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023247-13.dat	CryptoLocker_rule2
behavioral2/memory/2432-25-0x0000000000500000-0x0000000000510000-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/2432-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023247-13.dat	CryptoLocker_set1
behavioral2/memory/2432-25-0x0000000000500000-0x0000000000510000-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/2432-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023247-13.dat	UPX
behavioral2/memory/2432-25-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-16_ac576ab5b8a43b4586435e4aac603a3a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3360	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2432-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023247-13.dat	upx
behavioral2/memory/2432-25-0x0000000000500000-0x0000000000510000-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 2432 wrote to memory of 3360	2432	2024-04-16_ac576ab5b8a43b4586435e4aac603a3a_cryptolocker.exe	91
PID 2432 wrote to memory of 3360	2432	2024-04-16_ac576ab5b8a43b4586435e4aac603a3a_cryptolocker.exe	91
PID 2432 wrote to memory of 3360	2432	2024-04-16_ac576ab5b8a43b4586435e4aac603a3a_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-04-16_ac576ab5b8a43b4586435e4aac603a3a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-16_ac576ab5b8a43b4586435e4aac603a3a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2432
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.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=1408 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:8
1⤵
PID:4656

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
95KB

MD5
470065f1228e86f41fa7306c9a06e69f

SHA1
e3d8c12799cf7e697adf28940246bc6820d28dd3

SHA256
63bc59c6f460b41aad8bbc674ae6c1a4eab0014f6b10ca26fd91000e519fda22

SHA512
91dbf6c4a40d54dafc2e6d8790d9a73033cbadcac8ee37a6d1474641f37802ecff6253ae600df6b91178809c332c5680b0f842a50e40b6115e29beee4e1b4b1b

Download Submit
memory/2432-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2432-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2432-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2432-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/2432-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3360-18-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3360-20-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

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

Filesize
64KB

Download