1fd34d52c81bb4fa87b8ad6f24abdf458a415dde3020423ec66248f518a53a58

Analysis

max time kernel
157s
max time network
166s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
14-05-2024 19:46

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General

Target

2024-05-14_e2607842fb88253c794f63dde6b81cb9_cryptolocker.exe
Size

77KB
MD5

e2607842fb88253c794f63dde6b81cb9
SHA1

a60816b1a6588443f0e9654887fbc9e72a4475b4
SHA256

1fd34d52c81bb4fa87b8ad6f24abdf458a415dde3020423ec66248f518a53a58
SHA512

e243137ee65ebfe8698272ca74a5207101a8cfe4b60e0d71ccf5dedc41c88f9869e0d557f7723855fc117982433cd4ee713f4b080b6b4ba78f77610ac0355047
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxY:T6a+rdOOtEvwDpjNtHPn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/784-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/784-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023241-14.dat	CryptoLocker_rule2
behavioral2/memory/3752-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/784-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/784-10-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023241-14.dat	CryptoLocker_set1
behavioral2/memory/3752-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/784-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/784-10-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023241-14.dat	UPX
behavioral2/memory/3752-26-0x0000000000500000-0x0000000000510000-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	2024-05-14_e2607842fb88253c794f63dde6b81cb9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3752	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/784-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/784-10-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023241-14.dat	upx
behavioral2/memory/3752-26-0x0000000000500000-0x0000000000510000-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 784 wrote to memory of 3752	784	2024-05-14_e2607842fb88253c794f63dde6b81cb9_cryptolocker.exe	93
PID 784 wrote to memory of 3752	784	2024-05-14_e2607842fb88253c794f63dde6b81cb9_cryptolocker.exe	93
PID 784 wrote to memory of 3752	784	2024-05-14_e2607842fb88253c794f63dde6b81cb9_cryptolocker.exe	93

C:\Users\Admin\AppData\Local\Temp\2024-05-14_e2607842fb88253c794f63dde6b81cb9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-14_e2607842fb88253c794f63dde6b81cb9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:784
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3752

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=4092 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:8
1⤵
PID:3804

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
77KB

MD5
2317ad9d14386af01477c86ad00ab9b5

SHA1
67146ee337bd0a2a7e6812a4816628fcaf4e5918

SHA256
f12f66230058d7cd3e1257b98f8d67a513648a97d1b4b162c70afc23afa5fbb3

SHA512
d78b747e271d0b8c3fefaf2bba24031c13870b63cc7b132f62ac29fb453e02315de03dcca37a45016d0baa8958ad70b52f8a4eab6bd24c0b01e666b4ec85a435

Download Submit
memory/784-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/784-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/784-2-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/784-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/784-10-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3752-19-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/3752-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3752-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download