228c29d7131a49c955753cdb38ff35eb38c3122942799f1f72eabf8a38cd69e5

Analysis

max time kernel
142s
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
05/05/2024, 07:25

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General

Target

2024-05-05_22b14d02303ad795b0a0a99b4e7f593e_cryptolocker.exe
Size

77KB
MD5

22b14d02303ad795b0a0a99b4e7f593e
SHA1

705b40b58a09c169779b5063b430475e69deea1b
SHA256

228c29d7131a49c955753cdb38ff35eb38c3122942799f1f72eabf8a38cd69e5
SHA512

de0c15881a7ff3dac0cc57a8c68d56ebb3169982dc1e3008be2c93c6b7b4ddfb037b3d4bb1f335a6fae451eb6475d16c1a58c38b605e709b67ad9e9c2113ddca
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxB1j:T6a+rdOOtEvwDpjNtHPQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1600-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023289-13.dat	CryptoLocker_rule2
behavioral2/memory/1600-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1216-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1600-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023289-13.dat	CryptoLocker_set1
behavioral2/memory/1600-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1216-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1600-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023289-13.dat	UPX
behavioral2/memory/1600-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1216-26-0x0000000000500000-0x0000000000510000-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	2024-05-05_22b14d02303ad795b0a0a99b4e7f593e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1216	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1600-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023289-13.dat	upx
behavioral2/memory/1600-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1216-26-0x0000000000500000-0x0000000000510000-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 1600 wrote to memory of 1216	1600	2024-05-05_22b14d02303ad795b0a0a99b4e7f593e_cryptolocker.exe	91
PID 1600 wrote to memory of 1216	1600	2024-05-05_22b14d02303ad795b0a0a99b4e7f593e_cryptolocker.exe	91
PID 1600 wrote to memory of 1216	1600	2024-05-05_22b14d02303ad795b0a0a99b4e7f593e_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-05-05_22b14d02303ad795b0a0a99b4e7f593e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-05_22b14d02303ad795b0a0a99b4e7f593e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1600
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1216

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=1416 --field-trial-handle=3240,i,13319578961094268484,16557498665191861597,262144 --variations-seed-version /prefetch:8
1⤵
PID:4184

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
78KB

MD5
3149e71a92112a542b855bfdd1c95f28

SHA1
f09725df13bf2f6e6c7d6c20d17368ac8688bc7a

SHA256
a5bee9c97f6cf8e3613388ee4ab0a211cf005beb7c66e0808a922f32eb5b0d3e

SHA512
cabd95e22ba723ddb5e0d2c9a6b268c9f801535b50183d3b0bca3b3f235a1605f70e7a3a406246c955db83bb3b6dc740150c8b72a874ffc869491d53fd33f7a1

Download Submit
memory/1216-18-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/1216-24-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/1216-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1600-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1600-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1600-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1600-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1600-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download