99e5d97835a7f9fc7ea739c4fec811fe18a2f792a2fd9b356bd7533454bd3b8c

General

Target

2024-06-12_af48c2f4cb7b12d35c45342023151cbe_cryptolocker.exe
Size

92KB
MD5

af48c2f4cb7b12d35c45342023151cbe
SHA1

d7c5790edcda0d87e8e5f4f82a7a2d8d83661964
SHA256

99e5d97835a7f9fc7ea739c4fec811fe18a2f792a2fd9b356bd7533454bd3b8c
SHA512

4855fe12b4baae3418f4d1f2588d6dd20de6b136ce3ae8b45984e3f80777bdce3f5614f030b87ed6d9e9ddf7c8a055d7ce0c2e1fdabc783093e3ef86d0ed1b42
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgdd2I:AnBdOOtEvwDpj6zn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4160-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4160-10-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001100000002324d-14.dat	CryptoLocker_rule2
behavioral2/memory/1416-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1416-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4160-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4160-10-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x001100000002324d-14.dat	CryptoLocker_set1
behavioral2/memory/1416-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1416-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4160-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4160-10-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x001100000002324d-14.dat	UPX
behavioral2/memory/1416-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1416-28-0x0000000000500000-0x000000000050F000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-06-12_af48c2f4cb7b12d35c45342023151cbe_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1416	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4160-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4160-10-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x001100000002324d-14.dat	upx
behavioral2/memory/1416-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1416-28-0x0000000000500000-0x000000000050F000-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 4160 wrote to memory of 1416	4160	2024-06-12_af48c2f4cb7b12d35c45342023151cbe_cryptolocker.exe	90
PID 4160 wrote to memory of 1416	4160	2024-06-12_af48c2f4cb7b12d35c45342023151cbe_cryptolocker.exe	90
PID 4160 wrote to memory of 1416	4160	2024-06-12_af48c2f4cb7b12d35c45342023151cbe_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-06-12_af48c2f4cb7b12d35c45342023151cbe_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-12_af48c2f4cb7b12d35c45342023151cbe_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4160
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1416

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4104 --field-trial-handle=2280,i,11703952675008463361,17436195144517971517,262144 --variations-seed-version /prefetch:8
1⤵
PID:2856

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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
92KB

MD5
f4790979cfb69b8551dca9071efaf578

SHA1
07093ac7897939b1a9ba124a4f68d2bf79ee07e2

SHA256
e7b661de4d1d91dfabd97e9d17ba3d764418050eb4b306f756a3d59dc4b90d18

SHA512
5177925b1626291f756bf8e81550450e25b17a5d88eaab2cdc98995b71a86123c140f685b2ff64379c3c81348801c5f8d3bddfa6c535d519e4c6a80a2981d290

Download Submit
memory/1416-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1416-20-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/1416-26-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1416-28-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4160-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4160-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/4160-2-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/4160-3-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/4160-10-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

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