arkei | df4876573295b4e7beb618db31a015ea617f61b811978bb168d432c4052f7731

Analysis

max time kernel
143s
max time network
166s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
07/05/2022, 04:34

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General

Target
zxcv.exe
Size 100KB
Sample220507-e7ctwsegbj
SHA256 df4876573295b4e7beb618db31a015ea617f61b811978bb168d432c4052f7731
MD5 c7a310982da68b10360854f9cd78e718
SHA1 60140c28e0b7db797a771c2dee081fa3812246db
SHA512 6747fa3f7637922eeaa0feeb25d430dc6ab66fd9f3d22e7e5fd16bad9b75528a8174c34a8baf681950b64e8cdaa6a14e37633592e843c363e75468622ebd2ec3
MD5 SHA1 SHA512

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	zxcv.exe

Loads dropped DLL 2 IoCs

pid	Process
3016	MSBuild.exe
3016	MSBuild.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4692 set thread context of 3016	4692	zxcv.exe	100

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3144	3016	WerFault.exe	100

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4692	zxcv.exe
4692	zxcv.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4692	zxcv.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4692 wrote to memory of 3016	4692	zxcv.exe	100
PID 4692 wrote to memory of 3016	4692	zxcv.exe	100
PID 4692 wrote to memory of 3016	4692	zxcv.exe	100
PID 4692 wrote to memory of 3016	4692	zxcv.exe	100
PID 4692 wrote to memory of 3016	4692	zxcv.exe	100
PID 4692 wrote to memory of 3016	4692	zxcv.exe	100
PID 4692 wrote to memory of 3016	4692	zxcv.exe	100
PID 4692 wrote to memory of 3016	4692	zxcv.exe	100
PID 4692 wrote to memory of 3016	4692	zxcv.exe	100
PID 4692 wrote to memory of 3016	4692	zxcv.exe	100

C:\Users\Admin\AppData\Local\Temp\zxcv.exe
"C:\Users\Admin\AppData\Local\Temp\zxcv.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4692
- 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:3016
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3016 -s 1336
    3⤵
    - Program crash
    PID:3144

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 3016 -ip 3016
1⤵
PID:900

Network

MITRE ATT&CK Enterprise v6

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

mozglue.dll

Path C:\ProgramData\mozglue.dll
Size 133KB
SHA256 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
MD5 8f73c08a9660691143661bf7332c3c27
SHA1 37fa65dd737c50fda710fdbde89e51374d0c204a
SHA512 0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
SSDEEP 3072:7Gyzk/x2Wp53pUzPoNpj/kVghp1qt/dXDyp4D2JJJvPhrSeTuk:6yQ2Wp53iO/kVghp12/dXDyyD2JJJvPR
MD5 SHA1 SHA512 SSDEEP

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nss3.dll

Path C:\ProgramData\nss3.dll
Size 1.2MB
SHA256 e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
MD5 bfac4e3c5908856ba17d41edcd455a51
SHA1 8eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA512 2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
SSDEEP 24576:Sb5zzlswYNYLVJAwfpeYQ1Dw/fEE8DhSJVIVfRyAkgO6S/V/jbHpls4MSRSMxkoo:4zW5ygDwnEZIYkjgWjblMSRSMqH
MD5 SHA1 SHA512 SSDEEP

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memory/3016-135-0x0000000000400000-0x000000000043D000-memory.dmp

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memory/3016-137-0x0000000000400000-0x000000000043D000-memory.dmp

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memory/3016-138-0x0000000000400000-0x000000000043D000-memory.dmp

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memory/3016-139-0x0000000060900000-0x0000000060992000-memory.dmp

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memory/4692-130-0x0000000000830000-0x000000000084E000-memory.dmp

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memory/4692-131-0x0000000005750000-0x0000000005CF4000-memory.dmp

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memory/4692-132-0x0000000005240000-0x00000000052D2000-memory.dmp

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memory/4692-133-0x0000000005200000-0x000000000520A000-memory.dmp

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