1bdd3b8a11acbdfa86502ef67b222edaa3316cf1b1902ad4f07bc244c60f8915

Analysis

max time kernel
145s
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
29/01/2024, 08:27

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General

Target

2024-01-29_821c1c472f3cbc95147470e18226fb0d_cryptolocker.exe
Size

44KB
MD5

821c1c472f3cbc95147470e18226fb0d
SHA1

d7e03e53cae9ae30535a7a00ea5ddcfb39a0efac
SHA256

1bdd3b8a11acbdfa86502ef67b222edaa3316cf1b1902ad4f07bc244c60f8915
SHA512

dc0d3101c1b9e83ded56dd9e2f55f09f2726054c1a669366157206775e56a46e3a01ea5eaf30511a3695652ca934478f6563dc46876d809428637542b3ab80d1
SSDEEP

768:79inqyNR/QtOOtEvwDpjBKccJVODvcjpbA6q9:79mqyNhQMOtEvwDpjBzck96+

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/4476-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023158-13.dat	CryptoLocker_rule2
behavioral2/memory/4476-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4476-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0006000000023158-13.dat	CryptoLocker_set1
behavioral2/memory/4476-25-0x0000000000500000-0x000000000050F000-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_821c1c472f3cbc95147470e18226fb0d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3128	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 4476 wrote to memory of 3128	4476	2024-01-29_821c1c472f3cbc95147470e18226fb0d_cryptolocker.exe	84
PID 4476 wrote to memory of 3128	4476	2024-01-29_821c1c472f3cbc95147470e18226fb0d_cryptolocker.exe	84
PID 4476 wrote to memory of 3128	4476	2024-01-29_821c1c472f3cbc95147470e18226fb0d_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-01-29_821c1c472f3cbc95147470e18226fb0d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-29_821c1c472f3cbc95147470e18226fb0d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4476
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3128

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
44KB

MD5
3c9bcfa21a97aa61a22c09b4a8401ff8

SHA1
8f790488d279aee66922cb2ae0e300baa352425a

SHA256
74164b9bd53429ed34538271ce50dd5eed00e87e38236c01f8a45558a6165186

SHA512
58e76a9f3c4fd8e852566e4f84e67545c53a6a7fc644b27af65fddeb880ad0ec508b555b6dd1a50c77477f58ea5961c299f028dc944cc6b62f6ede6cb0e78287

Download Submit
memory/3128-18-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3128-19-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/4476-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4476-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4476-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4476-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4476-25-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download