nymaim | 00c218abf9a06151b0fe57b8253c20d79d621ae25b4d78558866004b46458186

General

Target

file.exe
Size

2.2MB
MD5

996d4d9b027151e10c0237347970ca6a
SHA1

413736534be3072bcc96ab3e40395e6717ab78c5
SHA256

00c218abf9a06151b0fe57b8253c20d79d621ae25b4d78558866004b46458186
SHA512

6c0a6fcf52929dc99df1578dfcd1de91ef7a9700afdde7226db6e09903f831fdd765a11d3157eb65407424a48bbb99109bf9fe4a2bafc0db3d6533c3db10f424
SSDEEP

49152:ITNygzuAlyJfUJxMafII8Pm6rqVQNOw74slEcw5AG5cyT:ITsLAlNka1xC37ZacyXcyT

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

pid	Process
1364	is-34I3A.tmp
1152	PrintFolders.exe
2792	GsxCwwn7UH.exe

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1364	is-34I3A.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

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\is-VLQ8E.tmp	is-34I3A.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-34I3A.tmp
File created	C:\Program Files (x86)\PrintFolders\is-O5TTL.tmp	is-34I3A.tmp
File created	C:\Program Files (x86)\PrintFolders\is-U26NM.tmp	is-34I3A.tmp
File created	C:\Program Files (x86)\PrintFolders\is-UI725.tmp	is-34I3A.tmp
File created	C:\Program Files (x86)\PrintFolders\is-G2QDL.tmp	is-34I3A.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-34I3A.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-34I3A.tmp
File created	C:\Program Files (x86)\PrintFolders\is-7GMJH.tmp	is-34I3A.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
1916	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1152	PrintFolders.exe
1152	PrintFolders.exe
1152	PrintFolders.exe
1152	PrintFolders.exe
1152	PrintFolders.exe
1152	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1152	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1916	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3728 wrote to memory of 1364	3728	file.exe	84
PID 3728 wrote to memory of 1364	3728	file.exe	84
PID 3728 wrote to memory of 1364	3728	file.exe	84
PID 1364 wrote to memory of 1152	1364	is-34I3A.tmp	86
PID 1364 wrote to memory of 1152	1364	is-34I3A.tmp	86
PID 1364 wrote to memory of 1152	1364	is-34I3A.tmp	86
PID 1152 wrote to memory of 2792	1152	PrintFolders.exe	87
PID 1152 wrote to memory of 2792	1152	PrintFolders.exe	87
PID 1152 wrote to memory of 2792	1152	PrintFolders.exe	87
PID 1152 wrote to memory of 4784	1152	PrintFolders.exe	97
PID 1152 wrote to memory of 4784	1152	PrintFolders.exe	97
PID 1152 wrote to memory of 4784	1152	PrintFolders.exe	97
PID 4784 wrote to memory of 1916	4784	cmd.exe	99
PID 4784 wrote to memory of 1916	4784	cmd.exe	99
PID 4784 wrote to memory of 1916	4784	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3728
- C:\Users\Admin\AppData\Local\Temp\is-HKJHV.tmp\is-34I3A.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-HKJHV.tmp\is-34I3A.tmp" /SL4 $A003E "C:\Users\Admin\AppData\Local\Temp\file.exe" 2083846 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1364
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:1152
  - - C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\GsxCwwn7UH.exe
      4⤵
      Executes dropped EXE
      PID:2792
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4784
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1916

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
3.3MB

MD5
9fe0aa872fb388f726a7e599d0f3b5f5

SHA1
d01c39c9e449670eb95f401acfbc108ba19855c1

SHA256
ce2c97e39a96fe3f64148a8fab3912ad42bf4bf9a58798b2cc9a0e6acce4e925

SHA512
1b4eaf850fd28b92c2cc22f0fd93c3d00f0e82ad6d9637e126c3993f4e338dede9346843450645e1f39c8675ea30bb8835da6c02cf530a7192b27f613379e419

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

Filesize
3.3MB

MD5
9fe0aa872fb388f726a7e599d0f3b5f5

SHA1
d01c39c9e449670eb95f401acfbc108ba19855c1

SHA256
ce2c97e39a96fe3f64148a8fab3912ad42bf4bf9a58798b2cc9a0e6acce4e925

SHA512
1b4eaf850fd28b92c2cc22f0fd93c3d00f0e82ad6d9637e126c3993f4e338dede9346843450645e1f39c8675ea30bb8835da6c02cf530a7192b27f613379e419

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-BQ00I.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-HKJHV.tmp\is-34I3A.tmp

Filesize
643KB

MD5
363a4d2aa5d6cf5cbb2267cccf0c4436

SHA1
a4cdb756698ed28f522956166a6292e9e309dd9c

SHA256
b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

SHA512
b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-HKJHV.tmp\is-34I3A.tmp

Filesize
643KB

MD5
363a4d2aa5d6cf5cbb2267cccf0c4436

SHA1
a4cdb756698ed28f522956166a6292e9e309dd9c

SHA256
b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

SHA512
b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

Download Submit
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\GsxCwwn7UH.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\GsxCwwn7UH.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1152-144-0x0000000000400000-0x0000000001545000-memory.dmp

Filesize
17.3MB

Download
memory/1152-143-0x0000000000400000-0x0000000001545000-memory.dmp

Filesize
17.3MB

Download
memory/1152-156-0x0000000000400000-0x0000000001545000-memory.dmp

Filesize
17.3MB

Download
memory/1152-145-0x0000000000400000-0x0000000001545000-memory.dmp

Filesize
17.3MB

Download
memory/1152-150-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1152-149-0x0000000000400000-0x0000000001545000-memory.dmp

Filesize
17.3MB

Download
memory/3728-138-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/3728-133-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/3728-157-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download

Analysis

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