44caliber | b94fcf4ac17020c3f379131719c6cfa33b8da8f930a455b952ad4ad44f888eb0

General

Target

5a673359f805a9349b7dbaa686cbc6e4_JaffaCakes118.exe
Size

5.7MB
MD5

5a673359f805a9349b7dbaa686cbc6e4
SHA1

2f31abdd1773521363234eb4d73970dbae46bb75
SHA256

b94fcf4ac17020c3f379131719c6cfa33b8da8f930a455b952ad4ad44f888eb0
SHA512

8aa30743bf3601d8395e07ae900f24f2fc7f016556693f0e71f2238165c29e1a296f8b44893f640d7a5d64b74740e76852e65ee844632167b8b4a4d2b7fd4b39
SSDEEP

98304:GswjbjOhJVHrhIW5xvgEEWhl3UE9h4NWvrrhm8AtrljsPojNwn/5xIp:JdtvEykE9hqWXXUMiOn/2

Score

10^/10

44caliber stormkitty discovery spyware stealer

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/867877948820029491/gtNPChnQebtHAxgaee1xYkhdf00jW3BJbkQZcVt_UHg2vTCcm1V7aZkXRIEEl3lxpWMG

Signatures

44Caliber
An open source infostealer written in C#.
stealer 44caliber
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000c000000023b14-7.dat	family_stormkitty
behavioral2/memory/3456-15-0x0000000000490000-0x00000000004B4000-memory.dmp	family_stormkitty

Checks computer location settings 2 TTPs 2 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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	5a673359f805a9349b7dbaa686cbc6e4_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	RCC.exe

Executes dropped EXE 3 IoCs

pid	Process
3456	build.exe
1488	RCC.exe
2512	GameWerCheatRust.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
21	raw.githubusercontent.com
22	raw.githubusercontent.com

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
6	freegeoip.app
8	freegeoip.app

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2512	GameWerCheatRust.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4200	2512	WerFault.exe	88

System Location Discovery: System Language Discovery 1 TTPs 1 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	GameWerCheatRust.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2512	GameWerCheatRust.exe
2512	GameWerCheatRust.exe
2512	GameWerCheatRust.exe
2512	GameWerCheatRust.exe
2512	GameWerCheatRust.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2512	GameWerCheatRust.exe
Token: SeDebugPrivilege	3456	build.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2512	GameWerCheatRust.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 4380 wrote to memory of 3456	4380	5a673359f805a9349b7dbaa686cbc6e4_JaffaCakes118.exe	84
PID 4380 wrote to memory of 3456	4380	5a673359f805a9349b7dbaa686cbc6e4_JaffaCakes118.exe	84
PID 4380 wrote to memory of 1488	4380	5a673359f805a9349b7dbaa686cbc6e4_JaffaCakes118.exe	85
PID 4380 wrote to memory of 1488	4380	5a673359f805a9349b7dbaa686cbc6e4_JaffaCakes118.exe	85
PID 1488 wrote to memory of 2512	1488	RCC.exe	88
PID 1488 wrote to memory of 2512	1488	RCC.exe	88
PID 1488 wrote to memory of 2512	1488	RCC.exe	88

C:\Users\Admin\AppData\Local\Temp\5a673359f805a9349b7dbaa686cbc6e4_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\5a673359f805a9349b7dbaa686cbc6e4_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4380
- C:\Users\Admin\AppData\Local\Temp\build.exe
  "C:\Users\Admin\AppData\Local\Temp\build.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3456
- C:\Users\Admin\AppData\Local\Temp\RCC.exe
  "C:\Users\Admin\AppData\Local\Temp\RCC.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:1488
- - C:\Users\Admin\AppData\Local\Temp\GameWerCheatRust.exe
    "C:\Users\Admin\AppData\Local\Temp\GameWerCheatRust.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2512
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2512 -s 1516
      4⤵
      Program crash
      PID:4200

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2512 -ip 2512
1⤵
PID:4228

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

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\44\Browsers\Firefox\Bookmarks.txt

Filesize
105B

MD5
2e9d094dda5cdc3ce6519f75943a4ff4

SHA1
5d989b4ac8b699781681fe75ed9ef98191a5096c

SHA256
c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

SHA512
d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

Download Submit
C:\Users\Admin\AppData\Local\Temp\GameWerCheatRust.exe

Filesize
1.2MB

MD5
7e088b115fa4207cfb39fb5c0af1efd3

SHA1
9bd0463048abb19af56da6699599cc61483dc851

SHA256
00ba9963874ec7834f3c205647e5b5336efc36d68c627904350b92a819bc3bc0

SHA512
45b0e5578ef3527a518600d5562af430964d00ec26ca84be4c77c5af70d4ca95f30cf0f29fedfa7a890108630e602ce7cef12ee303a677a96573e47f5f6a563f

Download Submit
C:\Users\Admin\AppData\Local\Temp\RCC.exe

Filesize
5.7MB

MD5
e56e1ee0af12a066ee5004ea327c53ee

SHA1
50aaf0098ec7ae18a964711ee3ecc4b20da208da

SHA256
40f450c93ce882fc29eabef25e8c13a7c3c8243de54c34d6a3bbc75aae69977b

SHA512
92a03ba03ea3ae0903fd3e314bc6fa7c0d148a4849ac2f33792dfe9053068f21059fef9f37983a8adc31626eaf2a9e0d2d8fc8c52a885aed6b615c4a56f38f1f

Download Submit
C:\Users\Admin\AppData\Local\Temp\build.exe

Filesize
120KB

MD5
16fe7e3582098aaef78c616f1e85dab5

SHA1
3446d42b2cf4fb14e278b2e5f829c3350d5b1f23

SHA256
07cf4c35d8ce3c40a8ea1ee7ae199b676e77cd89d1c6dc8400094fc9ac2aae8e

SHA512
562d462823d0576c743775af481e804f81bb0ff8a5734ba642d2b01df7226e9d0ff95d6d3959b0f8875d2453efc3efe79572a15fca3f8d135ee8932d49c8c902

Download Submit
memory/1488-31-0x0000000000160000-0x0000000000712000-memory.dmp

Filesize
5.7MB

Download
memory/1488-32-0x00007FFE02ED0000-0x00007FFE03991000-memory.dmp

Filesize
10.8MB

Download
memory/1488-47-0x00007FFE02ED0000-0x00007FFE03991000-memory.dmp

Filesize
10.8MB

Download
memory/2512-49-0x0000000000030000-0x00000000003E8000-memory.dmp

Filesize
3.7MB

Download
memory/2512-46-0x0000000000030000-0x00000000003E8000-memory.dmp

Filesize
3.7MB

Download
memory/2512-48-0x0000000000030000-0x00000000003E8000-memory.dmp

Filesize
3.7MB

Download
memory/2512-83-0x0000000006A00000-0x0000000006A92000-memory.dmp

Filesize
584KB

Download
memory/2512-84-0x0000000007050000-0x00000000075F4000-memory.dmp

Filesize
5.6MB

Download
memory/2512-86-0x0000000000030000-0x00000000003E8000-memory.dmp

Filesize
3.7MB

Download
memory/3456-15-0x0000000000490000-0x00000000004B4000-memory.dmp

Filesize
144KB

Download
memory/3456-87-0x00007FFE02ED0000-0x00007FFE03991000-memory.dmp

Filesize
10.8MB

Download
memory/3456-16-0x00007FFE02ED0000-0x00007FFE03991000-memory.dmp

Filesize
10.8MB

Download
memory/4380-30-0x00007FFE02ED0000-0x00007FFE03991000-memory.dmp

Filesize
10.8MB

Download
memory/4380-4-0x00007FFE02ED0000-0x00007FFE03991000-memory.dmp

Filesize
10.8MB

Download
memory/4380-1-0x0000000000980000-0x0000000000F44000-memory.dmp

Filesize
5.8MB

Download
memory/4380-0-0x00007FFE02ED3000-0x00007FFE02ED5000-memory.dmp

Filesize
8KB

Download

Analysis

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