nymaim | fc33189d3c146375f5742bbb0e82277e2b8ed3789d8feae27939e834b07ee8dc

General

Target

file.exe
Size

1.4MB
MD5

2ed741014b8cdafd91a740432a3cffa1
SHA1

3d65ac9a3d0950a55d4c7e4cb5a6fbfeab180cab
SHA256

fc33189d3c146375f5742bbb0e82277e2b8ed3789d8feae27939e834b07ee8dc
SHA512

a309386146699f4cfd48872f705cce681266c63af93d9e9347a79e940a6221ce6a3606e52f7afa8a4ca91e259c31f600bad43c851eca387941b4154fe69c6d3c
SSDEEP

24576:hizo5TdlqnGpid2DCDeCSxDQrOAE/1MA5sLspIYJj85itIqSdgZIY7eCLxYi5:KSjiQeef2E/1MDQLJjHIqDNeVi5

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim
Executes dropped EXE 3 IoCs

Processes:

is-8D624.tmpPrintFolders.exeZBtb9BOO7.exe

pid process

3616 is-8D624.tmp
5028 PrintFolders.exe
5068 ZBtb9BOO7.exe
Loads dropped DLL 1 IoCs

Processes:

is-8D624.tmp

pid process

3616 is-8D624.tmp
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

pid	process
3616	is-8D624.tmp
5028	PrintFolders.exe
5068	ZBtb9BOO7.exe

pid	process
3616	is-8D624.tmp

Drops file in Program Files directory 9 IoCs

Processes:

is-8D624.tmp

description	ioc	process
File created	C:\Program Files (x86)\PrintFolders\is-85SVL.tmp	is-8D624.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-8D624.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4KDVM.tmp	is-8D624.tmp
File created	C:\Program Files (x86)\PrintFolders\is-6R8HD.tmp	is-8D624.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-8D624.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-8D624.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4CFAE.tmp	is-8D624.tmp
File created	C:\Program Files (x86)\PrintFolders\is-6G103.tmp	is-8D624.tmp
File created	C:\Program Files (x86)\PrintFolders\is-7H0K8.tmp	is-8D624.tmp

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

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

PrintFolders.exe

pid process

5028 PrintFolders.exe
5028 PrintFolders.exe
5028 PrintFolders.exe
5028 PrintFolders.exe
5028 PrintFolders.exe
5028 PrintFolders.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

PrintFolders.exe

pid process

5028 PrintFolders.exe

pid	process
5028	PrintFolders.exe
5028	PrintFolders.exe
5028	PrintFolders.exe
5028	PrintFolders.exe
5028	PrintFolders.exe
5028	PrintFolders.exe

pid	process
5028	PrintFolders.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

file.exeis-8D624.tmpPrintFolders.exe

description	pid	process	target process
PID 4988 wrote to memory of 3616	4988	file.exe	is-8D624.tmp
PID 4988 wrote to memory of 3616	4988	file.exe	is-8D624.tmp
PID 4988 wrote to memory of 3616	4988	file.exe	is-8D624.tmp
PID 3616 wrote to memory of 5028	3616	is-8D624.tmp	PrintFolders.exe
PID 3616 wrote to memory of 5028	3616	is-8D624.tmp	PrintFolders.exe
PID 3616 wrote to memory of 5028	3616	is-8D624.tmp	PrintFolders.exe
PID 5028 wrote to memory of 5068	5028	PrintFolders.exe	ZBtb9BOO7.exe
PID 5028 wrote to memory of 5068	5028	PrintFolders.exe	ZBtb9BOO7.exe
PID 5028 wrote to memory of 5068	5028	PrintFolders.exe	ZBtb9BOO7.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4988

C:\Users\Admin\AppData\Local\Temp\is-PHC40.tmp\is-8D624.tmp
"C:\Users\Admin\AppData\Local\Temp\is-PHC40.tmp\is-8D624.tmp" /SL4 $A005E "C:\Users\Admin\AppData\Local\Temp\file.exe" 1252960 51712
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:3616

C:\Program Files (x86)\PrintFolders\PrintFolders.exe
"C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:5028

C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\ZBtb9BOO7.exe
4⤵
- Executes dropped EXE
PID:5068

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Filesize
1.9MB

MD5
2abbe052537a4c836afe8dbac888f131

SHA1
a0629a6130b7b7107681b033c0afee0c4eeb6cdb

SHA256
70717e7ee9e2a9ee5ef3804e3571b0df6a1c2abaf63179410a414c99705f9a47

SHA512
cd0361ef97cf7eb1cf248875fcba471a2d5a9f82fa38ea15825ee60159b16465904116c1244d0ca21ed3b49895c2647653ff836b7a114fe5ec384c4e28962e0d

Download Submit
C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Filesize
1.9MB

MD5
2abbe052537a4c836afe8dbac888f131

SHA1
a0629a6130b7b7107681b033c0afee0c4eeb6cdb

SHA256
70717e7ee9e2a9ee5ef3804e3571b0df6a1c2abaf63179410a414c99705f9a47

SHA512
cd0361ef97cf7eb1cf248875fcba471a2d5a9f82fa38ea15825ee60159b16465904116c1244d0ca21ed3b49895c2647653ff836b7a114fe5ec384c4e28962e0d

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-KKT38.tmp\_iscrypt.dll
Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-PHC40.tmp\is-8D624.tmp
Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-PHC40.tmp\is-8D624.tmp
Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\ZBtb9BOO7.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\ZBtb9BOO7.exe
Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/3616-134-0x0000000000000000-mapping.dmp

Download
memory/4988-132-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4988-136-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/5028-139-0x0000000000000000-mapping.dmp

Download
memory/5028-142-0x0000000000400000-0x00000000013E6000-memory.dmp

Filesize
15.9MB

Download
memory/5028-143-0x0000000000400000-0x00000000013E6000-memory.dmp

Filesize
15.9MB

Download
memory/5028-144-0x0000000000400000-0x00000000013E6000-memory.dmp

Filesize
15.9MB

Download
memory/5028-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/5028-152-0x0000000000400000-0x00000000013E6000-memory.dmp

Filesize
15.9MB

Download
memory/5068-145-0x0000000000000000-mapping.dmp

Download

Analysis

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