c38986dfdda1264b1d84371404eeeecbb5c459691be6bb42645be4958c477945

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27/02/2024, 15:48

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General

Target

2024-02-27_9c1193ff324432fbb96a1161c72fce37_cryptolocker.exe
Size

75KB
MD5

9c1193ff324432fbb96a1161c72fce37
SHA1

68449254d0fe75680c8b8239f3129ae24fd21d56
SHA256

c38986dfdda1264b1d84371404eeeecbb5c459691be6bb42645be4958c477945
SHA512

bdee43a0ccf1554dbeb00b8e190a13f571044231047270b1510049576ea0dd9d2687d9a1e24402c094f3f3052dec72b48f1799ce361f4883e63525259a7becc8
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdJca:T6a+rdOOtEvwDpjNt9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2708-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023215-13.dat	CryptoLocker_rule2
behavioral2/memory/2708-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1064-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2708-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023215-13.dat	CryptoLocker_set1
behavioral2/memory/2708-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1064-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2708-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023215-13.dat	UPX
behavioral2/memory/2708-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1064-26-0x0000000000500000-0x0000000000510000-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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	2024-02-27_9c1193ff324432fbb96a1161c72fce37_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1064	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2708-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023215-13.dat	upx
behavioral2/memory/2708-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1064-26-0x0000000000500000-0x0000000000510000-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 2708 wrote to memory of 1064	2708	2024-02-27_9c1193ff324432fbb96a1161c72fce37_cryptolocker.exe	89
PID 2708 wrote to memory of 1064	2708	2024-02-27_9c1193ff324432fbb96a1161c72fce37_cryptolocker.exe	89
PID 2708 wrote to memory of 1064	2708	2024-02-27_9c1193ff324432fbb96a1161c72fce37_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-02-27_9c1193ff324432fbb96a1161c72fce37_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-27_9c1193ff324432fbb96a1161c72fce37_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2708
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1064

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
75KB

MD5
4835e99dd6461d94e568745a4c491640

SHA1
220bbb8a87a4346f28275f330f37996cf2859ccb

SHA256
53d7632260a2e99e21b86b55dd8de0373b0f03215c762124e4d3f07c4935b86e

SHA512
a124f4c859d8df5eccb2123adb310ac6cca6f2c6c266e32faa085077f5a4e8d4d26f004546991e0493e1312a568c93f1d364a31187e7b5685c6b3758fbc3dbc1

Download Submit
memory/1064-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/1064-21-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/1064-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2708-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2708-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2708-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2708-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2708-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download