nymaim | 32474b6648ae92b066f322dfbed06b0cb51b203f0309ae0f79f4732650c7a13d

General

Target

file.exe
Size

1.4MB
MD5

37137f41a2ecc1e2b9eb829d95723597
SHA1

301385ae91a430970b221e1712ab8553403c8092
SHA256

32474b6648ae92b066f322dfbed06b0cb51b203f0309ae0f79f4732650c7a13d
SHA512

2bc6924602b2111a555f98a9526fd7ea707fc2bed5cfae0064c078879b388fd3d3b0a98e9ffd5cad2acb17dd487e512e5f13e46c714b6a17ff3e738c0158d374
SSDEEP

24576:xizGbxrOiiOxXq3A58V3tuLfMZs1QGKNEZJCz4SsJihtpEEmEpHvetwCgZIY7eCT:aGbgiidV3afMZ0BEUA4P6p1mGHmtYNek

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-N832Q.tmpPrintFolders.exewx8V4zIRE0CDF.exe

pid process

1080 is-N832Q.tmp
4788 PrintFolders.exe
3388 wx8V4zIRE0CDF.exe
Loads dropped DLL 1 IoCs

Processes:

is-N832Q.tmp

pid process

1080 is-N832Q.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
1080	is-N832Q.tmp
4788	PrintFolders.exe
3388	wx8V4zIRE0CDF.exe

pid	process
1080	is-N832Q.tmp

Drops file in Program Files directory 9 IoCs

Processes:

is-N832Q.tmp

description	ioc	process
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-N832Q.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-N832Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-R3QFP.tmp	is-N832Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-9LREA.tmp	is-N832Q.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-N832Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HNL5V.tmp	is-N832Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-N8RH5.tmp	is-N832Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-13995.tmp	is-N832Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-H70NF.tmp	is-N832Q.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

4788 PrintFolders.exe
4788 PrintFolders.exe
4788 PrintFolders.exe
4788 PrintFolders.exe
4788 PrintFolders.exe
4788 PrintFolders.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

PrintFolders.exe

pid process

4788 PrintFolders.exe

pid	process
4788	PrintFolders.exe
4788	PrintFolders.exe
4788	PrintFolders.exe
4788	PrintFolders.exe
4788	PrintFolders.exe
4788	PrintFolders.exe

pid	process
4788	PrintFolders.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

file.exeis-N832Q.tmpPrintFolders.exe

description	pid	process	target process
PID 5080 wrote to memory of 1080	5080	file.exe	is-N832Q.tmp
PID 5080 wrote to memory of 1080	5080	file.exe	is-N832Q.tmp
PID 5080 wrote to memory of 1080	5080	file.exe	is-N832Q.tmp
PID 1080 wrote to memory of 4788	1080	is-N832Q.tmp	PrintFolders.exe
PID 1080 wrote to memory of 4788	1080	is-N832Q.tmp	PrintFolders.exe
PID 1080 wrote to memory of 4788	1080	is-N832Q.tmp	PrintFolders.exe
PID 4788 wrote to memory of 3388	4788	PrintFolders.exe	wx8V4zIRE0CDF.exe
PID 4788 wrote to memory of 3388	4788	PrintFolders.exe	wx8V4zIRE0CDF.exe
PID 4788 wrote to memory of 3388	4788	PrintFolders.exe	wx8V4zIRE0CDF.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5080

C:\Users\Admin\AppData\Local\Temp\is-NJ13M.tmp\is-N832Q.tmp
"C:\Users\Admin\AppData\Local\Temp\is-NJ13M.tmp\is-N832Q.tmp" /SL4 $A004C "C:\Users\Admin\AppData\Local\Temp\file.exe" 1253722 51712
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1080

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:4788

C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\wx8V4zIRE0CDF.exe
4⤵
- Executes dropped EXE
PID:3388

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\PrintFolders\PrintFolders.exe

Filesize
1.9MB

MD5
8c82c88cc4b8847954b771e923316f7e

SHA1
cacb5c38d8834bbd4051174f09bd54210163a04d

SHA256
e231fdbda342a54842fe3f4edb95dac7433aa650235d7f4909fe67cc63e71c49

SHA512
2b60dc3e1fafe8fe672cf20c09e7ef02251d5131b9b8098695794d0c457e8deb595774b7e337122244a8de1a817f995efd3b89f8780572ed588230876defa479

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

Filesize
1.9MB

MD5
8c82c88cc4b8847954b771e923316f7e

SHA1
cacb5c38d8834bbd4051174f09bd54210163a04d

SHA256
e231fdbda342a54842fe3f4edb95dac7433aa650235d7f4909fe67cc63e71c49

SHA512
2b60dc3e1fafe8fe672cf20c09e7ef02251d5131b9b8098695794d0c457e8deb595774b7e337122244a8de1a817f995efd3b89f8780572ed588230876defa479

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-14EU8.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-NJ13M.tmp\is-N832Q.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-NJ13M.tmp\is-N832Q.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\wx8V4zIRE0CDF.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\wx8V4zIRE0CDF.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1080-135-0x0000000000000000-mapping.dmp

Download
memory/3388-146-0x0000000000000000-mapping.dmp

Download
memory/4788-143-0x0000000000400000-0x00000000013E6000-memory.dmp

Filesize
15.9MB

Download
memory/4788-144-0x0000000000400000-0x00000000013E6000-memory.dmp

Filesize
15.9MB

Download
memory/4788-145-0x0000000000400000-0x00000000013E6000-memory.dmp

Filesize
15.9MB

Download
memory/4788-140-0x0000000000000000-mapping.dmp

Download
memory/4788-149-0x0000000000400000-0x00000000013E6000-memory.dmp

Filesize
15.9MB

Download
memory/4788-150-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/5080-133-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/5080-138-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download

Analysis

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