arkei | df4876573295b4e7beb618db31a015ea617f61b811978bb168d432c4052f7731

General

Target

ghjkl.exe
Size

100KB
MD5

c7a310982da68b10360854f9cd78e718
SHA1

60140c28e0b7db797a771c2dee081fa3812246db
SHA256

df4876573295b4e7beb618db31a015ea617f61b811978bb168d432c4052f7731
SHA512

6747fa3f7637922eeaa0feeb25d430dc6ab66fd9f3d22e7e5fd16bad9b75528a8174c34a8baf681950b64e8cdaa6a14e37633592e843c363e75468622ebd2ec3

Score

10^/10

arkei default stealer suricata

Malware Config

Extracted

Family

arkei

Botnet

Default

Signatures

Arkei
Arkei is an infostealer written in C++.
stealer arkei
suricata: ET MALWARE Base64 Encoded Stealer Config from Server - APPDATA or USERPROFILE Environment Variable M4
suricata: ET MALWARE Base64 Encoded Stealer Config from Server - APPDATA or USERPROFILE Environment Variable M4
suricata

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-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	ghjkl.exe

Loads dropped DLL 2 IoCs

pid	Process
4040	MSBuild.exe
4040	MSBuild.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{5DE21634-2D23-43A5-B9BA-59FDDC61288E}.catalogItem	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{43D3C79D-540E-483F-A59E-21D01F4B5F55}.catalogItem	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4336 set thread context of 4040	4336	ghjkl.exe	95

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2300	4040	WerFault.exe	95

Checks processor information in registry 2 TTPs 3 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	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	svchost.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4336	ghjkl.exe
4336	ghjkl.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4336	ghjkl.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4336 wrote to memory of 4040	4336	ghjkl.exe	95
PID 4336 wrote to memory of 4040	4336	ghjkl.exe	95
PID 4336 wrote to memory of 4040	4336	ghjkl.exe	95
PID 4336 wrote to memory of 4040	4336	ghjkl.exe	95
PID 4336 wrote to memory of 4040	4336	ghjkl.exe	95
PID 4336 wrote to memory of 4040	4336	ghjkl.exe	95
PID 4336 wrote to memory of 4040	4336	ghjkl.exe	95
PID 4336 wrote to memory of 4040	4336	ghjkl.exe	95
PID 4336 wrote to memory of 4040	4336	ghjkl.exe	95
PID 4336 wrote to memory of 4040	4336	ghjkl.exe	95

C:\Users\Admin\AppData\Local\Temp\ghjkl.exe
"C:\Users\Admin\AppData\Local\Temp\ghjkl.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4336
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  2⤵
  - Loads dropped DLL
  PID:4040
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4040 -s 1312
    3⤵
    - Program crash
    PID:2300

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k netsvcs -p
1⤵
- Drops file in System32 directory
- Checks processor information in registry
- Enumerates system info in registry
PID:1312

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4040 -ip 4040
1⤵
PID:3444

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\mozglue.dll

Filesize
133KB

MD5
8f73c08a9660691143661bf7332c3c27

SHA1
37fa65dd737c50fda710fdbde89e51374d0c204a

SHA256
3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

SHA512
0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

Download Submit
C:\ProgramData\nss3.dll

Filesize
1.2MB

MD5
bfac4e3c5908856ba17d41edcd455a51

SHA1
8eec7e888767aa9e4cca8ff246eb2aacb9170428

SHA256
e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

SHA512
2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Download Submit
memory/4040-135-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/4040-137-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/4040-138-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/4040-139-0x0000000060900000-0x0000000060992000-memory.dmp

Filesize
584KB

Download
memory/4336-130-0x0000000000F10000-0x0000000000F2E000-memory.dmp

Filesize
120KB

Download
memory/4336-131-0x0000000005E50000-0x00000000063F4000-memory.dmp

Filesize
5.6MB

Download
memory/4336-132-0x0000000005940000-0x00000000059D2000-memory.dmp

Filesize
584KB

Download
memory/4336-133-0x00000000058E0000-0x00000000058EA000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads