gandcrab | ae865231cb46dd09afbd0213f6d29d158ae0c1752337ffab880183ea7fe96ed8

General

Target

o.exe
Size

183KB
MD5

07fadb006486953439ce0092651fd7a6
SHA1

e42431d37561cc695de03b85e8e99c9e31321742
SHA256

d77378dcc42b912e514d3bd4466cdda050dda9b57799a6c97f70e8489dd8c8d0
SHA512

5b09a07371bb5350b22c78aa3e7e673ba61ce72a964e072749a4633e2c15f416c05953cc6e6f6c586df010aa7f2c9c0ab87a014e4f732e5fdb2d58778a1fb437
SSDEEP

3072:Ealy19emgKe0QuYS3UmWuDTEltI3S/7IarDrjCgrQp0M7W:EaqxxDwx/7IS40MS

Score

10^/10

gandcrab backdoor ransomware spyware stealer

Malware Config

Signatures

Gandcrab
Gandcrab is a Trojan horse that encrypts files on a computer.
ransomware backdoor gandcrab
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490
Renames multiple (266) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware
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:

o.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3011986978-2180659500-3669311805-1000\Control Panel\International\Geo\Nation o.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3011986978-2180659500-3669311805-1000\Control Panel\International\Geo\Nation	o.exe

Drops startup file 2 IoCs

Processes:

o.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\SBPAR-DECRYPT.html	o.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\e6de4d4ee6de4aad35.lock	o.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

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

o.exe

description	ioc	process
File opened (read-only)	\??\I:	o.exe
File opened (read-only)	\??\N:	o.exe
File opened (read-only)	\??\V:	o.exe
File opened (read-only)	\??\Z:	o.exe
File opened (read-only)	\??\B:	o.exe
File opened (read-only)	\??\E:	o.exe
File opened (read-only)	\??\K:	o.exe
File opened (read-only)	\??\O:	o.exe
File opened (read-only)	\??\P:	o.exe
File opened (read-only)	\??\U:	o.exe
File opened (read-only)	\??\A:	o.exe
File opened (read-only)	\??\H:	o.exe
File opened (read-only)	\??\J:	o.exe
File opened (read-only)	\??\M:	o.exe
File opened (read-only)	\??\R:	o.exe
File opened (read-only)	\??\W:	o.exe
File opened (read-only)	\??\X:	o.exe
File opened (read-only)	\??\G:	o.exe
File opened (read-only)	\??\L:	o.exe
File opened (read-only)	\??\Q:	o.exe
File opened (read-only)	\??\S:	o.exe
File opened (read-only)	\??\T:	o.exe
File opened (read-only)	\??\Y:	o.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

Processes:

o.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3011986978-2180659500-3669311805-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\\\pidor.bmp"	o.exe

Drops file in Program Files directory 34 IoCs

Processes:

o.exe

description	ioc	process
File opened for modification	C:\Program Files\FindStep.cfg	o.exe
File opened for modification	C:\Program Files\SuspendRestore.rmi	o.exe
File opened for modification	C:\Program Files\TestExport.ppt	o.exe
File opened for modification	C:\Program Files\UnpublishConvertFrom.avi	o.exe
File opened for modification	C:\Program Files\WaitApprove.vdw	o.exe
File opened for modification	C:\Program Files\WatchAssert.vbe	o.exe
File created	C:\Program Files\SBPAR-DECRYPT.html	o.exe
File opened for modification	C:\Program Files\ConvertFromMount.xml	o.exe
File opened for modification	C:\Program Files\FormatExit.avi	o.exe
File opened for modification	C:\Program Files\PopUninstall.wmv	o.exe
File opened for modification	C:\Program Files\ResizeRestore.midi	o.exe
File opened for modification	C:\Program Files\SuspendStart.htm	o.exe
File opened for modification	C:\Program Files\UnprotectConvertTo.bmp	o.exe
File opened for modification	C:\Program Files\UnpublishSplit.vbs	o.exe
File opened for modification	C:\Program Files\BlockJoin.tif	o.exe
File opened for modification	C:\Program Files\EnableDisable.jtx	o.exe
File opened for modification	C:\Program Files\InitializePush.txt	o.exe
File opened for modification	C:\Program Files\ResumeCompress.eps	o.exe
File created	C:\Program Files\e6de4d4ee6de4aad35.lock	o.exe
File opened for modification	C:\Program Files\EditDisconnect.mpeg2	o.exe
File opened for modification	C:\Program Files\RemoveUninstall.cfg	o.exe
File opened for modification	C:\Program Files\TraceGrant.jfif	o.exe
File opened for modification	C:\Program Files\UnregisterMove.wdp	o.exe
File opened for modification	C:\Program Files\RestartMeasure.eps	o.exe
File opened for modification	C:\Program Files\SaveMount.wmf	o.exe
File created	C:\Program Files (x86)\e6de4d4ee6de4aad35.lock	o.exe
File opened for modification	C:\Program Files\FormatClose.ADTS	o.exe
File opened for modification	C:\Program Files\HideSuspend.html	o.exe
File opened for modification	C:\Program Files\ImportRead.ps1xml	o.exe
File opened for modification	C:\Program Files\RestartLock.001	o.exe
File created	C:\Program Files (x86)\SBPAR-DECRYPT.html	o.exe
File opened for modification	C:\Program Files\EnableSplit.mpeg2	o.exe
File opened for modification	C:\Program Files\PushUnlock.3g2	o.exe
File opened for modification	C:\Program Files\SendPing.docm	o.exe

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

System Information Discovery
T1082

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

Processes:

o.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	o.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	o.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	o.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

o.exe

pid process

2948 o.exe
2948 o.exe
2948 o.exe
2948 o.exe

pid	process
2948	o.exe
2948	o.exe
2948	o.exe
2948	o.exe

Suspicious use of AdjustPrivilegeToken 45 IoCs

Processes:

wmic.exevssvc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	1036	wmic.exe
Token: SeSecurityPrivilege	1036	wmic.exe
Token: SeTakeOwnershipPrivilege	1036	wmic.exe
Token: SeLoadDriverPrivilege	1036	wmic.exe
Token: SeSystemProfilePrivilege	1036	wmic.exe
Token: SeSystemtimePrivilege	1036	wmic.exe
Token: SeProfSingleProcessPrivilege	1036	wmic.exe
Token: SeIncBasePriorityPrivilege	1036	wmic.exe
Token: SeCreatePagefilePrivilege	1036	wmic.exe
Token: SeBackupPrivilege	1036	wmic.exe
Token: SeRestorePrivilege	1036	wmic.exe
Token: SeShutdownPrivilege	1036	wmic.exe
Token: SeDebugPrivilege	1036	wmic.exe
Token: SeSystemEnvironmentPrivilege	1036	wmic.exe
Token: SeRemoteShutdownPrivilege	1036	wmic.exe
Token: SeUndockPrivilege	1036	wmic.exe
Token: SeManageVolumePrivilege	1036	wmic.exe
Token: 33	1036	wmic.exe
Token: 34	1036	wmic.exe
Token: 35	1036	wmic.exe
Token: 36	1036	wmic.exe
Token: SeIncreaseQuotaPrivilege	1036	wmic.exe
Token: SeSecurityPrivilege	1036	wmic.exe
Token: SeTakeOwnershipPrivilege	1036	wmic.exe
Token: SeLoadDriverPrivilege	1036	wmic.exe
Token: SeSystemProfilePrivilege	1036	wmic.exe
Token: SeSystemtimePrivilege	1036	wmic.exe
Token: SeProfSingleProcessPrivilege	1036	wmic.exe
Token: SeIncBasePriorityPrivilege	1036	wmic.exe
Token: SeCreatePagefilePrivilege	1036	wmic.exe
Token: SeBackupPrivilege	1036	wmic.exe
Token: SeRestorePrivilege	1036	wmic.exe
Token: SeShutdownPrivilege	1036	wmic.exe
Token: SeDebugPrivilege	1036	wmic.exe
Token: SeSystemEnvironmentPrivilege	1036	wmic.exe
Token: SeRemoteShutdownPrivilege	1036	wmic.exe
Token: SeUndockPrivilege	1036	wmic.exe
Token: SeManageVolumePrivilege	1036	wmic.exe
Token: 33	1036	wmic.exe
Token: 34	1036	wmic.exe
Token: 35	1036	wmic.exe
Token: 36	1036	wmic.exe
Token: SeBackupPrivilege	2476	vssvc.exe
Token: SeRestorePrivilege	2476	vssvc.exe
Token: SeAuditPrivilege	2476	vssvc.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

o.exe

description	pid	process	target process
PID 2948 wrote to memory of 1036	2948	o.exe	wmic.exe
PID 2948 wrote to memory of 1036	2948	o.exe	wmic.exe
PID 2948 wrote to memory of 1036	2948	o.exe	wmic.exe

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\o.exe
"C:\Users\Admin\AppData\Local\Temp\o.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Enumerates connected drives
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2948

C:\Windows\SysWOW64\wbem\wmic.exe
"C:\Windows\system32\wbem\wmic.exe" shadowcopy delete
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1036

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2476

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File Deletion

Modify Registry

Credential Access

Credentials in Files

1

T1081

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

4

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Defacement

1

T1491

Inhibit System Recovery

1

T1490

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Downloads

C:\$Recycle.Bin\SBPAR-DECRYPT.html

Filesize
64KB

MD5
4fc85ce81781977d87f73d36a2419535

SHA1
d5e29e3857066c4d61ec8041032b03996f3eb17d

SHA256
1adbf339b158ec82fc96f9327c8afdda955d6c6e1e00a949faded21deb7a35b5

SHA512
0973e2ec2590687cb9c956d410ea2a5219dc6fb85a87b5996ab6389e45bb9d43556defd2da0cf53c1c31e59b6607aeb9bdd3d3bb06c2a729965b76ee551edbf7

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads