c956c9da5467f01a7bdb2f101fbc4c10870887f56a7a72b7da8a708e3009fea1

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
17/02/2024, 12:27

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General

Target

2024-02-17_1d3e44bf220713b46877c2e674dd54e5_cryptolocker.exe
Size

87KB
MD5

1d3e44bf220713b46877c2e674dd54e5
SHA1

1e04126f27536816537ceaa41fac78c04e421b03
SHA256

c956c9da5467f01a7bdb2f101fbc4c10870887f56a7a72b7da8a708e3009fea1
SHA512

850fcbd81de681caf535ba24524b901721ba97150083bd7071046a5ec8cafcfcd5517d9b456f8f85ab339dbae3198054ab555ea9ad52f7987b80751a8f93563a
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIJ/d:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4464-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023220-13.dat	CryptoLocker_rule2
behavioral2/memory/4464-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1212-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4464-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0006000000023220-13.dat	CryptoLocker_set1
behavioral2/memory/4464-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1212-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4464-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0006000000023220-13.dat	UPX
behavioral2/memory/4464-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1212-26-0x0000000000500000-0x000000000050F000-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-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation	2024-02-17_1d3e44bf220713b46877c2e674dd54e5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1212	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4464-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0006000000023220-13.dat	upx
behavioral2/memory/4464-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1212-26-0x0000000000500000-0x000000000050F000-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 4464 wrote to memory of 1212	4464	2024-02-17_1d3e44bf220713b46877c2e674dd54e5_cryptolocker.exe	84
PID 4464 wrote to memory of 1212	4464	2024-02-17_1d3e44bf220713b46877c2e674dd54e5_cryptolocker.exe	84
PID 4464 wrote to memory of 1212	4464	2024-02-17_1d3e44bf220713b46877c2e674dd54e5_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-17_1d3e44bf220713b46877c2e674dd54e5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-17_1d3e44bf220713b46877c2e674dd54e5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4464
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1212

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
87KB

MD5
9ded2099f424f5d38880ae64ef54377b

SHA1
32429e87182e1853d88fcde39555522fd817587e

SHA256
fe0f11752f9669648c7cb94cefede962e58c57c261a52714e8db658aac250d99

SHA512
9e83f248cddabdb1a154cd26f2f92d3bf01d3131205d753203ff2c7a07bed6cb5d7ae7a532777e22207a5ff511c83b8703e2ca342ea26c44b2dbd61bf2567604

Download Submit
memory/1212-20-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/1212-19-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/1212-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4464-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4464-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4464-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4464-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4464-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download