b0affe63d058038119f7bbeb47503a0c5f97322c3aba63d13ac6bbd760f4657f

Analysis

max time kernel
141s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
29-01-2024 12:24

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General

Target

2024-01-29_2866e789939e5bbca7704be72035c85a_cryptolocker.exe
Size

53KB
MD5

2866e789939e5bbca7704be72035c85a
SHA1

0d3fc5d95dc01bdc217df111783aa30d9408149a
SHA256

b0affe63d058038119f7bbeb47503a0c5f97322c3aba63d13ac6bbd760f4657f
SHA512

8734b9d423f2fc068f0731f5e12c058232b7b355392cb2f42297bde4bcce29f69ae306b0d465dd2967a5ea4cdc5231a88bc802c7c6ebe3a426c775652e178ccf
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/iVTab3GRuv3VylSV/Cdr:79mqyNhQMOtEvwDpjBPY7xv3g8q

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/224-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002312d-13.dat	CryptoLocker_rule2
behavioral2/memory/2600-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/224-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/224-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002312d-13.dat	CryptoLocker_set1
behavioral2/memory/2600-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/224-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-01-29_2866e789939e5bbca7704be72035c85a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2600	asih.exe

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 224 wrote to memory of 2600	224	2024-01-29_2866e789939e5bbca7704be72035c85a_cryptolocker.exe	84
PID 224 wrote to memory of 2600	224	2024-01-29_2866e789939e5bbca7704be72035c85a_cryptolocker.exe	84
PID 224 wrote to memory of 2600	224	2024-01-29_2866e789939e5bbca7704be72035c85a_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-01-29_2866e789939e5bbca7704be72035c85a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-29_2866e789939e5bbca7704be72035c85a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:224
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2600

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
54KB

MD5
c9408b1ed94079a5969f69859a106882

SHA1
235eda3d59882e3745e15817eb59a139fefb51b3

SHA256
ad458104bd925f41ef47b283498b4c16c1643fdc0609483801a4ec18812449e1

SHA512
5bdc3bebb43b9bdf5c9471c12fdd1d4a3dc894874e2922687bac596f1b7826f705e934622e3c78a7cbe74e3ba739b28822f4b7b779aa3dcdace225c09876b96e

Download Submit
memory/224-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/224-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/224-2-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/224-3-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/224-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2600-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2600-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2600-25-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download