colibri | c43c324bb6f807ace828d494d29a2584d95d594ae021a9212a51041d421b2914

General

Target

c43c324bb6f807ace828d494d29a2584d95d594ae021a9212a51041d421b2914.exe
Size

305KB
MD5

15c439fb774172746f18e03191291bbb
SHA1

3b5c200539e9d9bc5f00aba67b64c8cc507bc4ca
SHA256

c43c324bb6f807ace828d494d29a2584d95d594ae021a9212a51041d421b2914
SHA512

4f156490a1d034befc91651cd92c400e92d31fcaad6801f52623ccba4724c97d297839de7c0e4395b47dd1144f14f5ce73a43aeea898a0235ac7150c05ace6b0
SSDEEP

6144:Lt2RozEAzKbVIXQic43np3fXN7ziScvcc7LMZeNTbvCenD37:B2RozxCIXQepfNtcLLUOTrzD37

Score

10^/10

colibri build1 loader persistence

Malware Config

Extracted

Family

colibri

Version

1.2.0

Botnet

Build1

C2

http://zpltcmgodhvvedxtfcygvbgjkvgvcguygytfigj.cc/gate.php

http://yugyuvyugguitgyuigtfyutdtoghghbbgyv.cx/gate.php

Signatures

Colibri Loader
A loader sold as MaaS first seen in August 2021.
loader colibri
Executes dropped EXE 2 IoCs

Processes:

tmpB00B.tmp.exetmpB00B.tmp.exe

pid process

508 tmpB00B.tmp.exe
3800 tmpB00B.tmp.exe

pid	process
508	tmpB00B.tmp.exe
3800	tmpB00B.tmp.exe

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

Processes:

c43c324bb6f807ace828d494d29a2584d95d594ae021a9212a51041d421b2914.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	c43c324bb6f807ace828d494d29a2584d95d594ae021a9212a51041d421b2914.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

c43c324bb6f807ace828d494d29a2584d95d594ae021a9212a51041d421b2914.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Steam = "C:\\Users\\Admin\\AppData\\Roaming\\NVIDIA\\dllhost.exe"	c43c324bb6f807ace828d494d29a2584d95d594ae021a9212a51041d421b2914.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

tmpB00B.tmp.exe

description pid process target process

PID 508 set thread context of 3800 508 tmpB00B.tmp.exe tmpB00B.tmp.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

c43c324bb6f807ace828d494d29a2584d95d594ae021a9212a51041d421b2914.exe

description pid process

Token: SeDebugPrivilege 876 c43c324bb6f807ace828d494d29a2584d95d594ae021a9212a51041d421b2914.exe

description	pid	process	target process
PID 508 set thread context of 3800	508	tmpB00B.tmp.exe	tmpB00B.tmp.exe

description	pid	process
Token: SeDebugPrivilege	876	c43c324bb6f807ace828d494d29a2584d95d594ae021a9212a51041d421b2914.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

c43c324bb6f807ace828d494d29a2584d95d594ae021a9212a51041d421b2914.exetmpB00B.tmp.exe

description	pid	process	target process
PID 876 wrote to memory of 508	876	c43c324bb6f807ace828d494d29a2584d95d594ae021a9212a51041d421b2914.exe	tmpB00B.tmp.exe
PID 876 wrote to memory of 508	876	c43c324bb6f807ace828d494d29a2584d95d594ae021a9212a51041d421b2914.exe	tmpB00B.tmp.exe
PID 876 wrote to memory of 508	876	c43c324bb6f807ace828d494d29a2584d95d594ae021a9212a51041d421b2914.exe	tmpB00B.tmp.exe
PID 508 wrote to memory of 3800	508	tmpB00B.tmp.exe	tmpB00B.tmp.exe
PID 508 wrote to memory of 3800	508	tmpB00B.tmp.exe	tmpB00B.tmp.exe
PID 508 wrote to memory of 3800	508	tmpB00B.tmp.exe	tmpB00B.tmp.exe
PID 508 wrote to memory of 3800	508	tmpB00B.tmp.exe	tmpB00B.tmp.exe
PID 508 wrote to memory of 3800	508	tmpB00B.tmp.exe	tmpB00B.tmp.exe
PID 508 wrote to memory of 3800	508	tmpB00B.tmp.exe	tmpB00B.tmp.exe
PID 508 wrote to memory of 3800	508	tmpB00B.tmp.exe	tmpB00B.tmp.exe

C:\Users\Admin\AppData\Local\Temp\c43c324bb6f807ace828d494d29a2584d95d594ae021a9212a51041d421b2914.exe
"C:\Users\Admin\AppData\Local\Temp\c43c324bb6f807ace828d494d29a2584d95d594ae021a9212a51041d421b2914.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:876

C:\Users\Admin\AppData\Local\Temp\tmpB00B.tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmpB00B.tmp.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:508

C:\Users\Admin\AppData\Local\Temp\tmpB00B.tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmpB00B.tmp.exe"
3⤵
- Executes dropped EXE
PID:3800

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB00B.tmp.exe
Filesize
75KB

MD5
e0a68b98992c1699876f818a22b5b907

SHA1
d41e8ad8ba51217eb0340f8f69629ccb474484d0

SHA256
2b00d8c2bcc6b48e90524cdd41a07735dc94548ed41925baff86e43a61a4c37f

SHA512
856854f5fd89ae1669e4b2db10b73b4a78496bf80117003244c83e781f75e533e2e2bea9aa6c1b3aba3db1ed92ea0ed9755fbfd78cd6c86ba95867d07fc0ece2

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpB00B.tmp.exe
Filesize
75KB

MD5
e0a68b98992c1699876f818a22b5b907

SHA1
d41e8ad8ba51217eb0340f8f69629ccb474484d0

SHA256
2b00d8c2bcc6b48e90524cdd41a07735dc94548ed41925baff86e43a61a4c37f

SHA512
856854f5fd89ae1669e4b2db10b73b4a78496bf80117003244c83e781f75e533e2e2bea9aa6c1b3aba3db1ed92ea0ed9755fbfd78cd6c86ba95867d07fc0ece2

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpB00B.tmp.exe
Filesize
75KB

MD5
e0a68b98992c1699876f818a22b5b907

SHA1
d41e8ad8ba51217eb0340f8f69629ccb474484d0

SHA256
2b00d8c2bcc6b48e90524cdd41a07735dc94548ed41925baff86e43a61a4c37f

SHA512
856854f5fd89ae1669e4b2db10b73b4a78496bf80117003244c83e781f75e533e2e2bea9aa6c1b3aba3db1ed92ea0ed9755fbfd78cd6c86ba95867d07fc0ece2

Download Submit
memory/508-134-0x0000000000000000-mapping.dmp

Download
memory/508-137-0x0000000001150000-0x0000000001152000-memory.dmp

Filesize
8KB

Download
memory/876-132-0x0000000000E80000-0x0000000000ED0000-memory.dmp

Filesize
320KB

Download
memory/876-133-0x00007FFA44820000-0x00007FFA452E1000-memory.dmp

Filesize
10.8MB

Download
memory/876-142-0x00007FFA44820000-0x00007FFA452E1000-memory.dmp

Filesize
10.8MB

Download
memory/876-143-0x00007FFA44820000-0x00007FFA452E1000-memory.dmp

Filesize
10.8MB

Download
memory/3800-139-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download
memory/3800-138-0x0000000000000000-mapping.dmp

Download
memory/3800-141-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads