nymaim | e062abaf6962d7e4e919bed5647735c5858dcc77fd7d97f333d2d663238d842e

General

Target

file.exe
Size

1.2MB
MD5

071f89ff44b3a7d230d3a203ab09e6bb
SHA1

06f8f7bd94c01b4f4e3ecdd9be4d5e7ab7dd95b2
SHA256

e062abaf6962d7e4e919bed5647735c5858dcc77fd7d97f333d2d663238d842e
SHA512

d3a818a25731537ec8823d8ec4fabf8ccdb4e6c468890f6de0b322fce75b16c091fb07e1dce525abe8c5f0eb27b05af4973dfd7c1e39af9f9353ef5fb48eafa9
SSDEEP

24576:Jiz+ZR9o6SVKzoZJk2ZKowGb3Epbqi2uwugZIY7eCLxYiW:CwMKgxwGopbjyNeViW

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-TQ37Q.tmpPrintFolders.exeYkePX.exe

pid process

1044 is-TQ37Q.tmp
428 PrintFolders.exe
4128 YkePX.exe
Loads dropped DLL 1 IoCs

Processes:

is-TQ37Q.tmp

pid process

1044 is-TQ37Q.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
1044	is-TQ37Q.tmp
428	PrintFolders.exe
4128	YkePX.exe

pid	process
1044	is-TQ37Q.tmp

Drops file in Program Files directory 9 IoCs

Processes:

is-TQ37Q.tmp

description	ioc	process
File created	C:\Program Files (x86)\PrintFolders\is-MCR8A.tmp	is-TQ37Q.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-TQ37Q.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-TQ37Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-8C7NG.tmp	is-TQ37Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-NMNJ4.tmp	is-TQ37Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-776SK.tmp	is-TQ37Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-5RGVD.tmp	is-TQ37Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-SSJJ7.tmp	is-TQ37Q.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-TQ37Q.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

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

Processes:

PrintFolders.exe

pid process

428 PrintFolders.exe

pid	process
428	PrintFolders.exe
428	PrintFolders.exe
428	PrintFolders.exe
428	PrintFolders.exe
428	PrintFolders.exe
428	PrintFolders.exe

pid	process
428	PrintFolders.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

file.exeis-TQ37Q.tmpPrintFolders.exe

description	pid	process	target process
PID 4300 wrote to memory of 1044	4300	file.exe	is-TQ37Q.tmp
PID 4300 wrote to memory of 1044	4300	file.exe	is-TQ37Q.tmp
PID 4300 wrote to memory of 1044	4300	file.exe	is-TQ37Q.tmp
PID 1044 wrote to memory of 428	1044	is-TQ37Q.tmp	PrintFolders.exe
PID 1044 wrote to memory of 428	1044	is-TQ37Q.tmp	PrintFolders.exe
PID 1044 wrote to memory of 428	1044	is-TQ37Q.tmp	PrintFolders.exe
PID 428 wrote to memory of 4128	428	PrintFolders.exe	YkePX.exe
PID 428 wrote to memory of 4128	428	PrintFolders.exe	YkePX.exe
PID 428 wrote to memory of 4128	428	PrintFolders.exe	YkePX.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4300

C:\Users\Admin\AppData\Local\Temp\is-NRE29.tmp\is-TQ37Q.tmp
"C:\Users\Admin\AppData\Local\Temp\is-NRE29.tmp\is-TQ37Q.tmp" /SL4 $90030 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1047621 51712
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1044

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:428

C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\YkePX.exe
4⤵
- Executes dropped EXE
PID:4128

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
af575aad0b5901020fd24cee0f2240a6

SHA1
15354b17aa9e5bfd00c0e3f52dcbb45fac9b9eff

SHA256
edde6ce7708d430537f00e8dad603c07b2b512bb867581b7da171acadd0a50b8

SHA512
b5e1c354f531c9ac33a798d384eeccbdc5d6b1ea2caad151c1ac10843f6931c0d7bde0608121406938e265e324028e1112693d099fbdb7d144786380659370f1

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

Filesize
1.4MB

MD5
af575aad0b5901020fd24cee0f2240a6

SHA1
15354b17aa9e5bfd00c0e3f52dcbb45fac9b9eff

SHA256
edde6ce7708d430537f00e8dad603c07b2b512bb867581b7da171acadd0a50b8

SHA512
b5e1c354f531c9ac33a798d384eeccbdc5d6b1ea2caad151c1ac10843f6931c0d7bde0608121406938e265e324028e1112693d099fbdb7d144786380659370f1

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-8V7EM.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-NRE29.tmp\is-TQ37Q.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-NRE29.tmp\is-TQ37Q.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/428-139-0x0000000000000000-mapping.dmp

Download
memory/428-150-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/428-142-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/428-143-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/428-149-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/428-145-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/1044-135-0x0000000000000000-mapping.dmp

Download
memory/4128-146-0x0000000000000000-mapping.dmp

Download
memory/4300-134-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4300-144-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4300-132-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download

Analysis

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