0da0fc4b507040611b51ccf4a6a09f994256151b23c3b98f475e2d4be13e0b52

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
16-06-2024 04:28

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General

Target

2024-06-16_781f4ae3d655ea4cc44e2c310e22e5d2_cryptolocker.exe
Size

91KB
MD5

781f4ae3d655ea4cc44e2c310e22e5d2
SHA1

b86818f6ae2959a2d4e7526b7b848e5c06735ae9
SHA256

0da0fc4b507040611b51ccf4a6a09f994256151b23c3b98f475e2d4be13e0b52
SHA512

a149b4680f5fdd52b6835824809dcb4ba43db976b381222554e3710ee8e5afe08c88ad70d07fa37b9b3cf109c58a4ff63d01912b0d85ad5b369b914540c47c4c
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgddBZ:AnBdOOtEvwDpj6zr

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3632-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023278-13.dat	CryptoLocker_rule2
behavioral2/memory/3632-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2824-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3632-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023278-13.dat	CryptoLocker_set1
behavioral2/memory/3632-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2824-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3632-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0007000000023278-13.dat	UPX
behavioral2/memory/3632-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2824-27-0x0000000000500000-0x000000000050F000-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-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	2024-06-16_781f4ae3d655ea4cc44e2c310e22e5d2_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2824	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3632-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0007000000023278-13.dat	upx
behavioral2/memory/3632-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2824-27-0x0000000000500000-0x000000000050F000-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 3632 wrote to memory of 2824	3632	2024-06-16_781f4ae3d655ea4cc44e2c310e22e5d2_cryptolocker.exe	82
PID 3632 wrote to memory of 2824	3632	2024-06-16_781f4ae3d655ea4cc44e2c310e22e5d2_cryptolocker.exe	82
PID 3632 wrote to memory of 2824	3632	2024-06-16_781f4ae3d655ea4cc44e2c310e22e5d2_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-16_781f4ae3d655ea4cc44e2c310e22e5d2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-16_781f4ae3d655ea4cc44e2c310e22e5d2_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3632
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2824

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
91KB

MD5
27959fb83bbd9988c0649613da1887b0

SHA1
743e27d543bac0efac75a71088d541ff98ef5b31

SHA256
3b791f12f89c2fbc4d435792cfcf3fe7801ffccd964c9563762a437f00db081f

SHA512
5648e379cb3d1b130c4d0253344238e7236e36859323e44c68efe2d783b2c4da86fbca5f6a150c2a1894c8462eb0a287079f07c6a84a1574babe7e60da8130b9

Download Submit
memory/2824-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/2824-26-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2824-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3632-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3632-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3632-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3632-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3632-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download