856e4f040a32e93eb42f5790a655e5ebf5abe4d3f78a63ec9d405bd1fcdc9f5c

Analysis

max time kernel
147s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
26-04-2024 04:56

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General

Target

2024-04-26_9242d4a80404e89ea376dda085a44929_cryptolocker.exe
Size

23KB
MD5

9242d4a80404e89ea376dda085a44929
SHA1

f2202616a977f50ba14274d254b99962e4c3e3c3
SHA256

856e4f040a32e93eb42f5790a655e5ebf5abe4d3f78a63ec9d405bd1fcdc9f5c
SHA512

2f84d5d56c038c490d979635ecaeba32ac5715a2adab21459293d20ac5d70e8192a4600269c8106e16800245542bca98163e897688deae9ed71275444ba90ca4
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HnDU:bVCPwFRo6CpwXFXSqQXfjAHDU

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4908-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002346f-13.dat	CryptoLocker_rule2
behavioral2/memory/4908-18-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2672-26-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4908-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x000800000002346f-13.dat	UPX
behavioral2/memory/4908-18-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/2672-26-0x0000000008000000-0x000000000800E000-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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	2024-04-26_9242d4a80404e89ea376dda085a44929_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2672	hasfj.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4908-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x000800000002346f-13.dat	upx
behavioral2/memory/4908-18-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/2672-26-0x0000000008000000-0x000000000800E000-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 4908 wrote to memory of 2672	4908	2024-04-26_9242d4a80404e89ea376dda085a44929_cryptolocker.exe	88
PID 4908 wrote to memory of 2672	4908	2024-04-26_9242d4a80404e89ea376dda085a44929_cryptolocker.exe	88
PID 4908 wrote to memory of 2672	4908	2024-04-26_9242d4a80404e89ea376dda085a44929_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-04-26_9242d4a80404e89ea376dda085a44929_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-26_9242d4a80404e89ea376dda085a44929_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4908
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:2672

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\hasfj.exe

Filesize
23KB

MD5
c11bd04e7786884c09a215e09244f53a

SHA1
b12f6026b8449fe9b51994dacceb4ec43fa4fd85

SHA256
f02c047f165c6dfb273278553ac7657136261eb0a3b2f550928900d602539ba1

SHA512
33f51efb50a849d1429042c580fdc41ac2e78c5eed6ab1823f5138845b2ba66d1e57573fc303f12b253e3a5bb4b14c21b0f80811e28238b6bcf5bccd2117fe21

Download Submit
memory/2672-19-0x0000000002EC0000-0x0000000002EC6000-memory.dmp

Filesize
24KB

Download
memory/2672-20-0x0000000002D50000-0x0000000002D56000-memory.dmp

Filesize
24KB

Download
memory/2672-26-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/4908-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/4908-1-0x0000000002340000-0x0000000002346000-memory.dmp

Filesize
24KB

Download
memory/4908-2-0x0000000002340000-0x0000000002346000-memory.dmp

Filesize
24KB

Download
memory/4908-3-0x0000000002370000-0x0000000002376000-memory.dmp

Filesize
24KB

Download
memory/4908-18-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download