arkei | a1e0a1c53824bb1d9d0adcaa6a8e8e2f5bef673b0981807a5775a182f28fe235

General

Target

a1e0a1c53824bb1d9d0adcaa6a8e8e2f5bef673b0981807a5775a182f28fe235.exe
Size

68KB
MD5

311476e365e80b02b44b55ddcf5865c4
SHA1

d6fd497eb25234c77b2e8f672e292b5f9f760550
SHA256

a1e0a1c53824bb1d9d0adcaa6a8e8e2f5bef673b0981807a5775a182f28fe235
SHA512

70ff8f50b54df097a456689eed6c6218b2bb9d8c9e9f46c7b6e5a9dc5060eb331ba36f13cde252758b049f5b4ac498abf2d2b5c256edaf5dd7c777274e31b231
SSDEEP

1536:x2vMlMpCPJeGnyJDBld71oCe10yf0cCGMyo+JM4Z8L6Q3hs1:x2vMlMp8JeoyJDBlZycdGMyoYM+/D

Score

10^/10

arkei default credential_access discovery spyware stealer upx

Malware Config

Extracted

Family

arkei

Botnet

Default

Signatures

Arkei
Arkei is an infostealer written in C++.
stealer arkei
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003
Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
2564	cmd.exe

Loads dropped DLL 3 IoCs

pid	Process
2148	a1e0a1c53824bb1d9d0adcaa6a8e8e2f5bef673b0981807a5775a182f28fe235.exe
2148	a1e0a1c53824bb1d9d0adcaa6a8e8e2f5bef673b0981807a5775a182f28fe235.exe
2148	a1e0a1c53824bb1d9d0adcaa6a8e8e2f5bef673b0981807a5775a182f28fe235.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2148-0-0x0000000000400000-0x0000000000432000-memory.dmp	upx
behavioral1/memory/2148-1-0x0000000000400000-0x0000000000432000-memory.dmp	upx
behavioral1/memory/2148-53-0x0000000000400000-0x0000000000432000-memory.dmp	upx

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a1e0a1c53824bb1d9d0adcaa6a8e8e2f5bef673b0981807a5775a182f28fe235.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	a1e0a1c53824bb1d9d0adcaa6a8e8e2f5bef673b0981807a5775a182f28fe235.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	a1e0a1c53824bb1d9d0adcaa6a8e8e2f5bef673b0981807a5775a182f28fe235.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2596	timeout.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2148 wrote to memory of 2564	2148	a1e0a1c53824bb1d9d0adcaa6a8e8e2f5bef673b0981807a5775a182f28fe235.exe	32
PID 2148 wrote to memory of 2564	2148	a1e0a1c53824bb1d9d0adcaa6a8e8e2f5bef673b0981807a5775a182f28fe235.exe	32
PID 2148 wrote to memory of 2564	2148	a1e0a1c53824bb1d9d0adcaa6a8e8e2f5bef673b0981807a5775a182f28fe235.exe	32
PID 2148 wrote to memory of 2564	2148	a1e0a1c53824bb1d9d0adcaa6a8e8e2f5bef673b0981807a5775a182f28fe235.exe	32
PID 2564 wrote to memory of 2596	2564	cmd.exe	34
PID 2564 wrote to memory of 2596	2564	cmd.exe	34
PID 2564 wrote to memory of 2596	2564	cmd.exe	34
PID 2564 wrote to memory of 2596	2564	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\a1e0a1c53824bb1d9d0adcaa6a8e8e2f5bef673b0981807a5775a182f28fe235.exe
"C:\Users\Admin\AppData\Local\Temp\a1e0a1c53824bb1d9d0adcaa6a8e8e2f5bef673b0981807a5775a182f28fe235.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:2148
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\a1e0a1c53824bb1d9d0adcaa6a8e8e2f5bef673b0981807a5775a182f28fe235.exe" & exit
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2564
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2596

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Browser Information Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\ProgramData\mozglue.dll

Filesize
133KB

MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
\ProgramData\nss3.dll

Filesize
1.2MB

MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Download Submit
\ProgramData\sqlite3.dll

Filesize
630KB

MD5
e477a96c8f2b18d6b5c27bde49c990bf

SHA1
e980c9bf41330d1e5bd04556db4646a0210f7409

SHA256
16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

SHA512
335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

Download Submit
memory/2148-0-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2148-1-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2148-53-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download

Analysis

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