nymaim | ca3036197b66fff40ad56c5070e56025e3f640a73e96bc00d5751defbb59b935

General

Target

file.exe
Size

1.2MB
MD5

ac00a22251200048aaae02bc7e4d021b
SHA1

7bf250bfa164b2f39c494fd8947e3324a6480f49
SHA256

ca3036197b66fff40ad56c5070e56025e3f640a73e96bc00d5751defbb59b935
SHA512

e4dfe044ea28eb63c250c03f23d0d67c28c2f0824fcdc241c22390f833f5b35be109cb52ce5ced8d682bd05b56174265cdb0743b6aa889063d792e812dc2a1a9
SSDEEP

24576:pizWviPn9kSdMnAAUDAkOfx1Hx4snD0bu/P2uRG8cnQtp1n6aXfTbmDmIbPnmlCV:iEi/9SnTkW1HxFD0bu/P2uRG8UA1n6ok

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-DKMR3.tmpPrintFolders.exeVV0j5Vz.exe

pid process

2444 is-DKMR3.tmp
4988 PrintFolders.exe
4924 VV0j5Vz.exe

pid	process
2444	is-DKMR3.tmp
4988	PrintFolders.exe
4924	VV0j5Vz.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

Processes:

PrintFolders.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

Processes:

is-DKMR3.tmp

pid process

2444 is-DKMR3.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
2444	is-DKMR3.tmp

Drops file in Program Files directory 9 IoCs

Processes:

is-DKMR3.tmp

description	ioc	process
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-DKMR3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-M4C8A.tmp	is-DKMR3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-BH8A6.tmp	is-DKMR3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-E232L.tmp	is-DKMR3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-IDB48.tmp	is-DKMR3.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-DKMR3.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-DKMR3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-JS04S.tmp	is-DKMR3.tmp
File created	C:\Program Files (x86)\PrintFolders\is-8VR1O.tmp	is-DKMR3.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

Processes:

taskkill.exe

pid process

3244 taskkill.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

PrintFolders.exe

pid process

4988 PrintFolders.exe
4988 PrintFolders.exe
4988 PrintFolders.exe
4988 PrintFolders.exe
4988 PrintFolders.exe
4988 PrintFolders.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

taskkill.exe

description pid process

Token: SeDebugPrivilege 3244 taskkill.exe

pid	process
3244	taskkill.exe

pid	process
4988	PrintFolders.exe
4988	PrintFolders.exe
4988	PrintFolders.exe
4988	PrintFolders.exe
4988	PrintFolders.exe
4988	PrintFolders.exe

description	pid	process
Token: SeDebugPrivilege	3244	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

file.exeis-DKMR3.tmpPrintFolders.execmd.exe

description	pid	process	target process
PID 4976 wrote to memory of 2444	4976	file.exe	is-DKMR3.tmp
PID 4976 wrote to memory of 2444	4976	file.exe	is-DKMR3.tmp
PID 4976 wrote to memory of 2444	4976	file.exe	is-DKMR3.tmp
PID 2444 wrote to memory of 4988	2444	is-DKMR3.tmp	PrintFolders.exe
PID 2444 wrote to memory of 4988	2444	is-DKMR3.tmp	PrintFolders.exe
PID 2444 wrote to memory of 4988	2444	is-DKMR3.tmp	PrintFolders.exe
PID 4988 wrote to memory of 4924	4988	PrintFolders.exe	VV0j5Vz.exe
PID 4988 wrote to memory of 4924	4988	PrintFolders.exe	VV0j5Vz.exe
PID 4988 wrote to memory of 4924	4988	PrintFolders.exe	VV0j5Vz.exe
PID 4988 wrote to memory of 4188	4988	PrintFolders.exe	cmd.exe
PID 4988 wrote to memory of 4188	4988	PrintFolders.exe	cmd.exe
PID 4988 wrote to memory of 4188	4988	PrintFolders.exe	cmd.exe
PID 4188 wrote to memory of 3244	4188	cmd.exe	taskkill.exe
PID 4188 wrote to memory of 3244	4188	cmd.exe	taskkill.exe
PID 4188 wrote to memory of 3244	4188	cmd.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4976

C:\Users\Admin\AppData\Local\Temp\is-01QTV.tmp\is-DKMR3.tmp
"C:\Users\Admin\AppData\Local\Temp\is-01QTV.tmp\is-DKMR3.tmp" /SL4 $80028 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1065399 51712
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:2444

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 use of WriteProcessMemory
PID:4988

C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\VV0j5Vz.exe
4⤵
- Executes dropped EXE
PID:4924

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:4188

C:\Windows\SysWOW64\taskkill.exe
taskkill /im "PrintFolders.exe" /f
5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3244

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

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Downloads

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

Filesize
1.4MB

MD5
cbf8569d6270592c7f7f0ac6913c4029

SHA1
258775b6bed540e3eb299bf9796cc7dc3cec2f7e

SHA256
1619ed599ea2b2531d2fe64b10d0361a240f12b508bcaabc619e2dee55887b54

SHA512
b11b0b7d51afc9d16b36dfbc1808f91734207200af36affeae81a83e9d1e340885b2beeb39840cd9578ffb18537fc67a5618d6da2b9e7e7ae5096b494ce731f8

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

Filesize
1.4MB

MD5
cbf8569d6270592c7f7f0ac6913c4029

SHA1
258775b6bed540e3eb299bf9796cc7dc3cec2f7e

SHA256
1619ed599ea2b2531d2fe64b10d0361a240f12b508bcaabc619e2dee55887b54

SHA512
b11b0b7d51afc9d16b36dfbc1808f91734207200af36affeae81a83e9d1e340885b2beeb39840cd9578ffb18537fc67a5618d6da2b9e7e7ae5096b494ce731f8

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-01QTV.tmp\is-DKMR3.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-01QTV.tmp\is-DKMR3.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-DCQ9K.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\VV0j5Vz.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\VV0j5Vz.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/2444-135-0x0000000000000000-mapping.dmp

Download
memory/3244-154-0x0000000000000000-mapping.dmp

Download
memory/4188-153-0x0000000000000000-mapping.dmp

Download
memory/4924-145-0x0000000000000000-mapping.dmp

Download
memory/4976-156-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4976-132-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4976-134-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/4988-143-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/4988-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4988-152-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/4988-144-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/4988-142-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/4988-155-0x0000000000400000-0x0000000001373000-memory.dmp

Filesize
15.4MB

Download
memory/4988-139-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads