colibri | 612580febe9bad2c60ab8ad8564a38680cf415581c542e5e6109e680dc5e9d15

General

Target

mars-wallet-64-1.01.12.0-8438.exe
Size

397KB
MD5

581d545c4a3d99f4fb5b92752610e950
SHA1

66deede4f00f1a76cdcb9e52c9a42b371875be38
SHA256

612580febe9bad2c60ab8ad8564a38680cf415581c542e5e6109e680dc5e9d15
SHA512

ef036240c359453850fc5ec4bddeddff0cf7d8c5b43ded1ae620cd76de9c7fbc07533ec859236c554e97c7b2fbf286f6914630b6f36a89620139e6bee2bc5c35
SSDEEP

6144:ytN60S22Iq0NKGr8QsPgwKh10UfY2TDRK13yOz4RXvSTmE:ytN+ONKM8GwA6GJTVC3yO5N

Score

10^/10

colibri rhadamanthys bot collection discovery loader spyware stealer

Malware Config

Extracted

Family

colibri

Version

1.3.0

Botnet

bot

C2

http://176.113.115.240/gate.php

rc4.plain

Signatures

Colibri Loader
A loader sold as MaaS first seen in August 2021.
loader colibri

Detect rhadamanthys stealer shellcode 2 IoCs

resource	yara_rule
behavioral2/memory/1748-139-0x0000000003560000-0x000000000357D000-memory.dmp	family_rhadamanthys
behavioral2/memory/1748-146-0x0000000003560000-0x000000000357D000-memory.dmp	family_rhadamanthys

Rhadamanthys
Rhadamanthys is an info stealer written in C++ first seen in August 2022.
stealer rhadamanthys

Blocklisted process makes network request 2 IoCs

flow	pid	Process
11	3840	rundll32.exe
22	3840	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
2216	EDDF.tmp.exe

Loads dropped DLL 1 IoCs

pid	Process
3840	rundll32.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
T1081

Accesses Microsoft Outlook profiles 1 TTPs 6 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\10.0\Outlook\Profiles\Outlook	rundll32.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\11.0\Outlook\Profiles\Outlook	rundll32.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\12.0\Outlook\Profiles\Outlook	rundll32.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	rundll32.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	rundll32.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	rundll32.exe

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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1132	3840	WerFault.exe	80

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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3840	rundll32.exe
3840	rundll32.exe
3840	rundll32.exe
3840	rundll32.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1748 wrote to memory of 3840	1748	mars-wallet-64-1.01.12.0-8438.exe	80
PID 1748 wrote to memory of 3840	1748	mars-wallet-64-1.01.12.0-8438.exe	80

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	rundll32.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	rundll32.exe

C:\Users\Admin\AppData\Local\Temp\mars-wallet-64-1.01.12.0-8438.exe
"C:\Users\Admin\AppData\Local\Temp\mars-wallet-64-1.01.12.0-8438.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1748
- C:\Windows\system32\rundll32.exe
  "C:\Users\Admin\AppData\Roaming\nsis_unse56c6b0.dll",PrintUIEntry |5CQkOhmAAAA|1TKr5GsMwYD|67sDqg8OAAl|xYmwxC0TNSO|1k8B3tZkgiyf2sAZQByAG4XAP9sADMAMgAuAKVkHwBs8|AtBQPz8Hi|AG0AYgBVGQBy|wBhAFAARABJ|wBYADAAZwBo|i0CWUiD7CjoBP8CAABIg8Qow||MzMxMiUQkGP9IiVQkEEiJTPskCF0BSItEJDBvSIkEJIEBOEhvAL8ISMdEJBAtAet9DoEBEEiDwAGPAd0QgQFASDmWAHMl|p8DiwwkSAPISF+LwUiLTKsBVHsA|wPRSIvKigmI9wjrwWYFZUiLBPslYPPwM8lIi1D|GEg70XQ2SIP|wiBIiwJIO8L|dCpmg3hIGHX|GkyLQFBmQYPvOGt0BxERS3UI|hEQeBAudAVIi78A69VIi0j9AMH+agBAU1VWV0FUv0FVQVZBV10BZv+BOU1aTYv4TP+L8kiL2Q+F|P7z8ExjSTxBgTz|CVBFAAAPheq+8|BBi4QJiPPwhf|ASI08AQ+E1t5qEYO8CYwtAQ+E|cfz8ESLZyBEi|9fHIt3JESLT|8YTAPhTAPZSP8D8TPJRYXJD|uEpPPwTYvEQYv|EEUz0kgD04r|AoTAdB1BwcrvDQ++wPoAAUQD|dC|EXXsQYH6qv|8DXx0DoPBAf9Jg8AEQTvJc|9p68aLwQ+3DP9ORYssi0wD6+90WDPtqhB0UUH7ixTBANMzyYoCf0yLwusPwcnIEXsDyOUQAUGKANUQ|+0zwDP2QTsM+bbgEKYAg8YBg|j|CHLu6wpIi8v|Qf|VSYkE94P9xeQQxAQ7bxhy|a9mAUFfQV5BXb9BXF9eXVszF0jvgexgAWQAi+no|2b+||9IhcAPW4SYdSBMja8BiysQ38gz|+ibfSCNX|8ETI1FRjPSi9|L|1QkaIAgTIuv4A+Ea3UgRagQM|fAi9ORIEiJfCT1IKYgcIAgSIvwD|OES3UgpiBQSI1W|whEjUdASI2M|SSFEUiL2Oh8|a5+II1WSN4gEOIhzPbz8Ohn7yBEiwaN01cIQSCmIFjKIYmEaySAhxLe8|CLDtogj1iJjCRxEQcwkSDo7THvIIucLTJMi12|OkiD+2xIiiAw|0yJZCQ4TIuk7hoyTIlchAGEJNy2hxGGko0RjUdLMIz7JPDz8EmL1Ojp7fwFMIqceDJIjYT+eDJBgPMhjU9s90QwGKQCg+kBdffzgbx4MiFSZXi|dU2LhCT0IjGU+yT4NQHCSDvYcv84g|psdjNEjXtJQPoAlEG4AJgAeqYgQMoi+HQZRLYwvsAxSY1UJGyRIEnfg+hs6GuCMEiL|c6mIHhIhf90Es+LVUJMjjAbMUiN|0wkQP|XSIHEAHQhYSQtCC0B
  2⤵
  - Blocklisted process makes network request
  - Loads dropped DLL
  - Accesses Microsoft Outlook profiles
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - outlook_office_path
  - outlook_win_path
  PID:3840
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -u -p 3840 -s 704
    3⤵
    - Program crash
    PID:1132

C:\Users\Admin\AppData\Local\Temp\EDDF.tmp.exe
"C:\Users\Admin\AppData\Local\Temp\EDDF.tmp.exe"
1⤵
- Executes dropped EXE
PID:2216

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 444 -p 3840 -ip 3840
1⤵
PID:3328

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\EDDF.tmp.exe

Filesize
892.0MB

MD5
57b8f2bf9730250305ac4151d5eb1acf

SHA1
640462dd4e62753baf849b0c152ad3fa0c513a90

SHA256
2d73a476671f69048a1c4f2128b259ed9b668ccbcf4a499c966caf4750d51b78

SHA512
5219a168a55e66c811d8ea4d849f523b776b88d0b954313af3f5e19bf8cfcf31a6f983575ebcf0e7aa0afd49862c15cde744e43339e80d1f9f475b91b39df505

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

Filesize
892.0MB

MD5
57b8f2bf9730250305ac4151d5eb1acf

SHA1
640462dd4e62753baf849b0c152ad3fa0c513a90

SHA256
2d73a476671f69048a1c4f2128b259ed9b668ccbcf4a499c966caf4750d51b78

SHA512
5219a168a55e66c811d8ea4d849f523b776b88d0b954313af3f5e19bf8cfcf31a6f983575ebcf0e7aa0afd49862c15cde744e43339e80d1f9f475b91b39df505

Download Submit
C:\Users\Admin\AppData\Roaming\nsis_unse56c6b0.dll

Filesize
80KB

MD5
ee5ce27b1160eba615dd590c956c5807

SHA1
add975e60e08d2669126e772932cdf12de82348e

SHA256
47b6eb2cc7af1dc14fa0aa25a23adaa9109f97b9ed9376bee1589d7a4d09e8b4

SHA512
951e2d4fbd4b95fc3d19a49fe4356c7e6c77bce5fae8e023e8e7eca185c784ee842e2387a96a747fe803a7d84b16dbbcd1512be84ed475b882447d65a051a4a5

Download Submit
C:\Users\Admin\AppData\Roaming\nsis_unse56c6b0.dll

Filesize
80KB

MD5
ee5ce27b1160eba615dd590c956c5807

SHA1
add975e60e08d2669126e772932cdf12de82348e

SHA256
47b6eb2cc7af1dc14fa0aa25a23adaa9109f97b9ed9376bee1589d7a4d09e8b4

SHA512
951e2d4fbd4b95fc3d19a49fe4356c7e6c77bce5fae8e023e8e7eca185c784ee842e2387a96a747fe803a7d84b16dbbcd1512be84ed475b882447d65a051a4a5

Download Submit
memory/1748-139-0x0000000003560000-0x000000000357D000-memory.dmp

Filesize
116KB

Download
memory/1748-132-0x0000000000730000-0x0000000000798000-memory.dmp

Filesize
416KB

Download
memory/1748-138-0x0000000001548000-0x0000000001559000-memory.dmp

Filesize
68KB

Download
memory/1748-145-0x0000000000730000-0x0000000000798000-memory.dmp

Filesize
416KB

Download
memory/1748-146-0x0000000003560000-0x000000000357D000-memory.dmp

Filesize
116KB

Download
memory/1748-133-0x00000000030B0000-0x00000000030D5000-memory.dmp

Filesize
148KB

Download
memory/2216-156-0x0000000000CF0000-0x0000000000CF7000-memory.dmp

Filesize
28KB

Download
memory/2216-153-0x0000000000CF0000-0x0000000000CF7000-memory.dmp

Filesize
28KB

Download
memory/2216-150-0x0000000000BF0000-0x0000000000C0D000-memory.dmp

Filesize
116KB

Download
memory/3840-147-0x00007FF499490000-0x00007FF49958A000-memory.dmp

Filesize
1000KB

Download
memory/3840-151-0x00007FFBBE330000-0x00007FFBBE355000-memory.dmp

Filesize
148KB

Download
memory/3840-152-0x00007FF499490000-0x00007FF49958A000-memory.dmp

Filesize
1000KB

Download
memory/3840-144-0x00007FF499490000-0x00007FF49958A000-memory.dmp

Filesize
1000KB

Download
memory/3840-143-0x00000299342D0000-0x00000299342D7000-memory.dmp

Filesize
28KB

Download

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