nymaim | 7fb775bfd7d8cb1996f71d31d3adf1e43e2cb4e5e510ba1100b96f7771f6cda7

General

Target

file.exe
Size

1.2MB
MD5

8e3cc7a15832cfaa724fd78702f138b9
SHA1

5577aa437fed39905d0180a21e4d48acee4b273f
SHA256

7fb775bfd7d8cb1996f71d31d3adf1e43e2cb4e5e510ba1100b96f7771f6cda7
SHA512

7c91b66950344a312377906a819acac7155127b709e125c5b1819c557da6849fa6ed41fa6168bd41d6c9ea15f256ed5bef682569fea75078415d1b52e660f797
SSDEEP

24576:lizWfodPvghouOwKHyhftBOsPYkglXcr7ZQeeilngZIY7eCLxYil:OndHguvfcPYllXI7+3ilgNeVil

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-466KT.tmpPrintFolders.exePFI8xqxo.exe

pid process

5036 is-466KT.tmp
1736 PrintFolders.exe
1792 PFI8xqxo.exe
Loads dropped DLL 1 IoCs

Processes:

is-466KT.tmp

pid process

5036 is-466KT.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
5036	is-466KT.tmp
1736	PrintFolders.exe
1792	PFI8xqxo.exe

pid	process
5036	is-466KT.tmp

Drops file in Program Files directory 9 IoCs

Processes:

is-466KT.tmp

description	ioc	process
File created	C:\Program Files (x86)\PrintFolders\is-VQ28P.tmp	is-466KT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-TTMCS.tmp	is-466KT.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-466KT.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-466KT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-K733A.tmp	is-466KT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-N2QE6.tmp	is-466KT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-J0N3U.tmp	is-466KT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-0OA6R.tmp	is-466KT.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-466KT.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

1736 PrintFolders.exe
1736 PrintFolders.exe
1736 PrintFolders.exe
1736 PrintFolders.exe
1736 PrintFolders.exe
1736 PrintFolders.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

PrintFolders.exe

pid process

1736 PrintFolders.exe

pid	process
1736	PrintFolders.exe
1736	PrintFolders.exe
1736	PrintFolders.exe
1736	PrintFolders.exe
1736	PrintFolders.exe
1736	PrintFolders.exe

pid	process
1736	PrintFolders.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

file.exeis-466KT.tmpPrintFolders.exe

description	pid	process	target process
PID 3068 wrote to memory of 5036	3068	file.exe	is-466KT.tmp
PID 3068 wrote to memory of 5036	3068	file.exe	is-466KT.tmp
PID 3068 wrote to memory of 5036	3068	file.exe	is-466KT.tmp
PID 5036 wrote to memory of 1736	5036	is-466KT.tmp	PrintFolders.exe
PID 5036 wrote to memory of 1736	5036	is-466KT.tmp	PrintFolders.exe
PID 5036 wrote to memory of 1736	5036	is-466KT.tmp	PrintFolders.exe
PID 1736 wrote to memory of 1792	1736	PrintFolders.exe	PFI8xqxo.exe
PID 1736 wrote to memory of 1792	1736	PrintFolders.exe	PFI8xqxo.exe
PID 1736 wrote to memory of 1792	1736	PrintFolders.exe	PFI8xqxo.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3068

C:\Users\Admin\AppData\Local\Temp\is-Q83SR.tmp\is-466KT.tmp
"C:\Users\Admin\AppData\Local\Temp\is-Q83SR.tmp\is-466KT.tmp" /SL4 $30074 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1071535 51712
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:5036

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:1736

C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\PFI8xqxo.exe
4⤵
- Executes dropped EXE
PID:1792

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
1.4MB

MD5
a1b911ee14b465a247042e2135431430

SHA1
893f1e5428589bccc3d8621a868e7c7a695395a4

SHA256
19dbf882dd3d3d77edea5f8ea79ca4f93bd4faf78eacd9b7917d96eea9a5cdd3

SHA512
5dc581b2fc10a15a3afddef975250bc63c601e0f0516c6e42f904064bd7dc21924fe57ddfa93d79d5f9b92e00cdb3cf5609c8de87b19b972405c17fd231150c7

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

Filesize
1.4MB

MD5
a1b911ee14b465a247042e2135431430

SHA1
893f1e5428589bccc3d8621a868e7c7a695395a4

SHA256
19dbf882dd3d3d77edea5f8ea79ca4f93bd4faf78eacd9b7917d96eea9a5cdd3

SHA512
5dc581b2fc10a15a3afddef975250bc63c601e0f0516c6e42f904064bd7dc21924fe57ddfa93d79d5f9b92e00cdb3cf5609c8de87b19b972405c17fd231150c7

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-JO53N.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-Q83SR.tmp\is-466KT.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-Q83SR.tmp\is-466KT.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\PFI8xqxo.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\PFI8xqxo.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1736-140-0x0000000000000000-mapping.dmp

Download
memory/1736-143-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/1736-144-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/1736-145-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/1736-149-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/1792-146-0x0000000000000000-mapping.dmp

Download
memory/3068-132-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/3068-139-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/3068-134-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/5036-135-0x0000000000000000-mapping.dmp

Download

Analysis

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